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Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
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1

Injection of Zero Valent Iron into an Unconfined Aquifer Using...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids. Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids....

2

Demonstration of Combined Zero-Valent Iron and Electrical Resistance...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Demonstration of Combined Zero-Valent Iron and Electrical Resistance Heating for In Situ Trichloroethene Remediation. Demonstration of Combined Zero-Valent Iron and Electrical...

3

Zero-valent iron nanoparticles preparation  

SciTech Connect (OSTI)

Graphical abstract: Zero-valent iron nanoparticles were synthesized by hydrogenating [Fe[N(Si(CH{sub 3}){sub 3}){sub 2}]{sub 2}] at room temperature and a pressure of 3 atm. The synthesized nanoparticles were spherical and had diameters less than 5 nm. Highlights: ? Zero-valent iron nanoparticles were synthesized by hydrogenating [Fe[N(Si(CH{sub 3}){sub 3}){sub 2}]{sub 2}]. ? The conditions of reaction were at room temperature and a pressure of 3 atm. ? The synthesized nanoparticles were spherical and had diameters less than 5 nm. -- Abstract: Zero-valent iron nanoparticles were synthesized by hydrogenating [Fe[N(Si(CH{sub 3}){sub 3}){sub 2}]{sub 2}] at room temperature and a pressure of 3 atm. To monitor the reaction, a stainless steel pressure reactor lined with PTFE and mechanically stirred was designed. This design allowed the extraction of samples at different times, minimizing the perturbation in the system. In this way, the shape and the diameter of the nanoparticles produced during the reaction were also monitored. The results showed the production of zero-valent iron nanoparticles that were approximately 5 nm in diameter arranged in agglomerates. The agglomerates grew to 900 nm when the reaction time increased up to 12 h; however, the diameter of the individual nanoparticles remained almost the same. During the reaction, some byproducts constituted by amino species acted as surfactants; therefore, no other surfactants were necessary.

Oropeza, S. [Instituto Politécnico Nacional, ESIQIE, UPALM, Edificio Z-6, Primer Piso, C.P. 07738, Col. San Pedro Zacatenco, México D.F. (Mexico)] [Instituto Politécnico Nacional, ESIQIE, UPALM, Edificio Z-6, Primer Piso, C.P. 07738, Col. San Pedro Zacatenco, México D.F. (Mexico); Corea, M., E-mail: mcoreat@yahoo.com.mx [Instituto Politécnico Nacional, ESIQIE, UPALM, Edificio Z-6, Primer Piso, C.P. 07738, Col. San Pedro Zacatenco, México D.F. (Mexico); Gómez-Yáñez, C. [Instituto Politécnico Nacional, ESIQIE, UPALM, Edificio Z-6, Primer Piso, C.P. 07738, Col. San Pedro Zacatenco, México D.F. (Mexico)] [Instituto Politécnico Nacional, ESIQIE, UPALM, Edificio Z-6, Primer Piso, C.P. 07738, Col. San Pedro Zacatenco, México D.F. (Mexico); Cruz-Rivera, J.J. [Universidad Autónoma de San Luis Potosí, Instituto de Metalurgia, Sierra Leona 550, San Luis Potosí, C.P. 78210 (Mexico)] [Universidad Autónoma de San Luis Potosí, Instituto de Metalurgia, Sierra Leona 550, San Luis Potosí, C.P. 78210 (Mexico); Navarro-Clemente, M.E., E-mail: mnavarroc@ipn.mx [Instituto Politécnico Nacional, ESIQIE, UPALM, Edificio Z-6, Primer Piso, C.P. 07738, Col. San Pedro Zacatenco, México D.F. (Mexico)

2012-06-15T23:59:59.000Z

4

Chromate transport through columns packed with surfactant-modified zeolite/zero valent iron pellets  

E-Print Network [OSTI]

Chromate transport through columns packed with surfactant-modified zeolite/zero valent iron pellets Chromate transport through columns packed with zeolite/zero valent iron (Z/ZVI) pellets, either untreated originated from chromate sorption onto the HDTMA modified Z/ZVI pellets. Due to dual porosity, the presence

Li, Zhaohui

5

Degradation of Polymers Coating Nano-scale Zero Valent Iron Particles used in Groundwater Remediation  

E-Print Network [OSTI]

Degradation of Polymers Coating Nano-scale Zero Valent Iron Particles used in Groundwater chemicals (Zhang, 2003). Nano-scale zero valent iron (NZVI) can be injected into the soil to degrade centrifugation. UV spectrophotometer: The polymers could be quantified when dissolved in pure water or in mineral

Barthelat, Francois

6

Sulfur-Modified Zero-Valent Iron for Remediation Applications at DOE Sites - 13600  

SciTech Connect (OSTI)

Many DOE remediation sites have chemicals of concern that are compounds in higher oxidation states, which make them both more mobile and more toxic. The chemical reduction of these compounds both prevents the migration of these chemicals and in some cases reduces the toxicity. It has also been shown that zero-valent iron is a very effective substance to use in reducing oxygenated compounds in various treatment processes. These have included the treatment of halogenated hydrocarbons in the form volatile organic compounds used as solvents and pesticides. Zero-valent iron has also been used to reduce various oxidized metals such as chromium, arsenic, and mercury in order to immobilize them, decrease their toxicity, and prevent further transport. In addition, it has been used to immobilize or break down other non-metallic species such as selenium compounds and nitrates. Of particular interest at several DOE remediation sites is the fact that zero-valent iron is very effective in immobilizing several radioactive metals which are mobile in their oxidized states. These include both technetium and uranium. The main difficulty in using zero-valent iron has been its tendency to become inactive after relatively short periods of time. While it is advantageous to have the zero-valent iron particles as porous as possible in order to provide maximum surface area for reactions to take place, these pores can become clogged when the iron is oxidized. This is due to the fact that ferric oxide has a greater volume for a given mass than metallic iron. When the surfaces of the iron particles oxidize to ferric oxide, the pores become narrower and will eventually shut. In order to minimize the degradation of the chemical activity of the iron due to this process, a modification of zero-valent iron has been developed which prevents or slows this process, which decreases its effectiveness. It is called sulfur-modified iron, and it has been produced in high purity for applications in municipal water treatment applications. Sulfur-modified iron has been found to not only be an extremely economical treatment technology for municipal water supplies, where very large quantities of water must be treated economically, but it has also been demonstrated to immobilize technetium. It has the added benefit of eliminating several other harmful chemicals in water supplies. These include arsenic and selenium. In one large-scale evaluation study an integrated system implemented chemical reduction of nitrate with sulfur-modified iron followed by filtration for arsenic removal. The sulfur-modified iron that was used was an iron-based granular medium that has been commercially developed for the removal of nitrate, co-contaminants including uranium, vanadium and chromium, and other compounds from water. The independent study concluded that 'It is foreseen that the greatest benefit of this technology (sulfur-modified iron) is that it does not produce a costly brine stream as do the currently accepted nitrate removal technologies of ion exchange and reverse osmosis. This investigation confirmed that nitrate reduction via sulfur-modified iron is independent of the hydraulic loading rate. Future sulfur-modified iron treatment systems can be designed without restriction of the reactor vessel dimensions. Future vessels can be adapted to existing site constraints without being limited to height-to-width ratios that would exist if nitrate reduction were to depend on hydraulic loading rate'. Sulfur-modified iron was studied by the Pacific Northwest National Laboratory (PNNL) for its effectiveness in the reduction and permanent sequestration of technetium. The testing was done using Hanford Site groundwater together with sediment. The report stated, 'Under reducing conditions, TcO{sub 4} is readily reduced to TcIV, which forms highly insoluble oxides such at TcO{sub 2}.nH{sub 2}O. However, (re)oxidation of TcIV oxides can lead to remobilization. Under sulfidogenic conditions, most TcIV will be reduced and immobilized as Tc{sub 2}S{sub 7}, which is less readily re-mobilized, ev

Fogwell, Thomas W. [Fogwell Consulting, P.O. Box 20221, Piedmont, CA 94620 (United States)] [Fogwell Consulting, P.O. Box 20221, Piedmont, CA 94620 (United States); Santina, Pete [SMI-PS, Inc., 2073 Prado Vista, Lincoln, CA 95648 (United States)] [SMI-PS, Inc., 2073 Prado Vista, Lincoln, CA 95648 (United States)

2013-07-01T23:59:59.000Z

7

Chemical Reduction of PCE by Zero Valent Iron Colloids Batch and Column Experiments  

E-Print Network [OSTI]

Chemical Reduction of PCE by Zero Valent Iron Colloids ­ Batch and Column Experiments Motivation nm NAPASAN Particle - nZVI / PCE-Solution 0 20 40 60 80 100 120 140 0 2 4 6 8 10 12 14 16 18 20 22 24H[-] PCE - Inflow PCE - Outflow TCE - Inflow TCE - Outflow Chloride - Outflow Blank Value Chloride pH Value

Cirpka, Olaf Arie

8

Zero Valent Iron: Impact of Anions Present during Synthesis on...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

iron nanoparticles was quantified by monitoring the kinetics as well as products of carbon tetrachloride reduction, and significant differences in reactivity and chloroform...

9

Calcite precipitation dominates the electrical signatures of zero valent iron columns under simulated field conditions  

SciTech Connect (OSTI)

Calcium carbonate is a secondary mineral precipitate influencing zero valent iron (ZVI) barrier reactivity and hydraulic performance. We conducted column experiments to investigate electrical signatures resulting from concurrent CaCO{sub 3} and iron oxides precipitation under simulated field geochemical conditions. We identified CaCO{sub 3} as a major mineral phase throughout the columns, with magnetite present primarily close to the influent based on XRD analysis. Electrical measurements revealed decreases in conductivity and polarization of both columns, suggesting that electrically insulating CaCO{sub 3} dominates the electrical response despite the presence of electrically conductive iron oxides. SEM/EDX imaging suggests that the electrical signal reflects the geometrical arrangement of the mineral phases. CaCO{sub 3} forms insulating films on ZVI/magnetite surfaces, restricting charge transfer between the pore electrolyte and ZVI particles, as well as across interconnected ZVI particles. As surface reactivity also depends on the ability of the surface to engage in redox reactions via charge transfer, electrical measurements may provide a minimally invasive technology for monitoring reactivity loss due to CaCO{sub 3} precipitation. Comparison between laboratory and field data shows consistent changes in electrical signatures due to iron corrosion and secondary mineral precipitation.

Wu, Yuxin; Versteeg, R.; Slater, L.; LaBrecque, D.

2009-06-01T23:59:59.000Z

10

Degradation of carbon tetrachloride in the presence of zero-valent iron.  

SciTech Connect (OSTI)

Efforts to achieve the decomposition of carbon tetrachloride through anaerobic and aerobic bioremediation and chemical transformation have met with limited success because of the conditions required and the formation of hazardous intermediates. Recently, particles of zero-valent iron (ZVI) have been used with limited success for in situ remediation of carbon tetrachloride. We studied a modified microparticulate product that combines controlled-release carbon with ZVI for stimulation of in situ chemical reduction of persistent organic compounds in groundwater. With this product, a number of physical, chemical, and microbiological processes were combined to create very strongly reducing conditions that stimulate rapid, complete dechlorination of organic solvents. In principle, the organic component of ZVI microparticles is nutrient rich and hydrophilic and has high surface area capable of supporting the growth of bacteria in the groundwater environment. In our experiments, we found that as the bacteria grew, oxygen was consumed, and the redox potential decreased to values reaching -600 mV. The small modified ZVI particles provide substantial reactive surface area that, in these conditions, directly stimulates chemical dechlorination and cleanup of the contaminated area without accumulation of undesirable breakdown products. The objective of this work was to evaluate the effectiveness of ZVI microparticles in reducing carbon tetrachloride under laboratory and field conditions. Changes in concentrations and in chemical and physical parameters were monitored to determine the role of the organic products in the reductive dechlorination reaction. Laboratory and field studies are presented.

Alvarado, J. S.; Rose, C.; LaFreniere, L.; Environmental Science Division

2010-01-01T23:59:59.000Z

11

Deployment of an innovative thermally enhanced soil mixing process augmented with zero-valent iron.  

SciTech Connect (OSTI)

An innovative in-situ soil treatment process, referred to as soil mixing/thermally enhanced soil vapor extraction (SM/TESVE), was used to remediate the 317 Area of Argonne National Laboratory-East (i.e., Argonne), which is contaminated with volatile organic compounds (VOCs). Following the initial soil treatment, polishing was required to reduce residual concentrations of contaminants. A study of polishing methods was conducted. It determined that injecting metallic iron particles into the soil, in conjunction with soil mixing, would reduce residual VOC concentrations more effectively than the original conventional soil ventilation approach. After the effectiveness of iron injection was verified, it replaced the soil ventilation step. The modified process involved mixing the soil while hot air and steam were injected into it. Off-gases were captured in a hood over the treatment area. During this process, an iron slurry, consisting of up to 50% iron particles in water with guar gum added as a thickening agent, was injected and mixed into the soil by the mixing equipment. Approximately 6,246 m{sup 3} (8, 170 yd{sup 3}) of soil was treated during this project. Confirmatory samples were then collected. In these samples, VOC concentrations were usually reduced by more than 80%.

Lynch, P. L.

1999-01-15T23:59:59.000Z

12

An Experimental Study of Micron-Size Zero-Valent Iron Emplacement in Permeable Porous Media Using Polymer-Enhanced Fluids  

SciTech Connect (OSTI)

At the Hanford Site, an extensive In Situ Redox Manipulation (ISRM) permeable reactive barrier was installed to prevent chromate from reaching the Columbia River. However, chromium has been detected in several wells, indicating a premature loss of the reductive capacity in the aquifer. One possible cause for premature chromate breakthrough is associated with the presence of high-permeability zones in the aquifer. In these zones, groundwater moves relatively fast and is able to oxidize iron more rapidly. There is also a possibility that the high-permeability flow paths are deficient in reducing equivalents (e.g. reactive iron), required for barrier performance. One way enhancement of the current barrier reductive capacity can be achieved is by the addition of micron-scale zero-valent iron to the high-permeability zones within the aquifer. The potential emplacement of zero-valent iron (Fe0) into high-permeability Hanford sediments (Ringold Unit E gravels) using shear-thinning fluids containing polymers was investigated in three-dimensional wedge-shaped aquifer models. Polymers were used to create a suspension viscous enough to keep the Fe0 in solution for extended time periods to improve colloid movement into the porous media without causing a permanent detrimental decrease in hydraulic conductivity. Porous media were packed in the wedge-shaped flow cell to create either a heterogeneous layered system with a high-permeability zone in between two low-permeability zones or a high-permeability channel surrounded by low-permeability materials. The injection flow rate, polymer type, polymer concentration, and injected pore volumes were determined based on preliminary short- and long-column experiments.

Oostrom, Mart; Wietsma, Thomas W.; Covert, Matthew A.; Vermeul, Vince R.

2005-12-22T23:59:59.000Z

13

Perchlorate reduction using electrochemically induced pitting corrosion of zero-valent titanium  

E-Print Network [OSTI]

effective technologies, especially chemical treatments, to completely destroy trace levels of perchlorate present in drinking and groundwater. The research on perchlorate reduction by zero-valent titanium (Ti(0)) showed that perchlorate was effectively...

Lee, Chun Woo

2009-05-15T23:59:59.000Z

14

Dispersivity Testing of Zero-Valent Iron Treatment Cells: Monticello, Utah,  

Energy Savers [EERE]

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15

Fundamental Studies of the Removal of Contaminants from Ground and Waste Waters via Reduction by Zero-Valent Metals  

SciTech Connect (OSTI)

Contaminated groundwater and surface waters are a problem throughout the United States and the world. In many instances, the types of contamination can be directly attributed to man's actions. For instance, the burial of chemical wastes, casual disposal of solvents in unlined pits, and the development of irrigated agriculture have all contributed to groundwater and surface water contamination. The kinds of contaminants include chlorinated solvents and toxic trace elements (including radioisotopes) that are soluble and mobile in soils and aquifers. Oxyanions of uranium, selenium, chromium, arsenic, technetium, and chlorine (as perchlorate) are frequently found as contaminants on many DOE sites. Uranium is a particularly widespread contaminant at most DOE sites including Oak Ridge, Rocky Flats, Hanford, Idaho (INEEL), and Fernald. The uranium contamination is associated with mining and milling of uranium ore (UMTRA sites), isotope separation and enrichment, and mixed waste and TRU waste burial. In addition, the careless disposal of halogenated solvents, such as carbon tetrachloride and trichloroethylene, has further contaminated many groundwaters at these sites. A potential remediation method for many of these oxyanions and chlorinated-solvents is to react the contaminated water with zero-valent iron. In this reaction, the iron serves as both an electron source and as a catalyst. Elemental iron is already being used on an experimental basis at many DOE sites. Both in situ reactive barriers and above-ground reactors are being developed for this purpose. However, the design and operation of these treatment systems requires a detailed process-level understanding of the interactions between the contaminants and the iron surfaces. We are performing fundamental investigations of the interactions of the relevant chlorinated solvents and trace element-containing compounds with single- and poly-crystalline Fe surfaces. The aim of this work is to develop th e fundamental physical and chemical understanding that is necessary for the development of cleanup techniques and procedures.

Yarmoff, Jory A.; Amrhein, Christopher

1999-06-01T23:59:59.000Z

16

Fundamental Studies of The Removal of Contaminants from Ground and Waste Waters Via Reduction By Zero-Valent metals  

SciTech Connect (OSTI)

Oxyanions of uranium, selenium, chromium, arsenic, technetium, and chlorine (as perchlorate) are frequently found as contaminants on many DOE sites, and in other areas of the U.S.. A potential remediation method is to react the contaminated water with zero-valent iron (ZVI). We are performing fundamental investigations of the interactions of the relevant compounds with Fe filings and single- and poly-crystalline surfaces. The aim of this work is to develop the physical and chemical understanding that is necessary for the development of cleanup techniques and procedures.

Jory A. Yarmoff; Christopher Amrhein

2002-04-23T23:59:59.000Z

17

Degradation of organic and inorganic contaminants by zero valent iron  

E-Print Network [OSTI]

/Feo. The only product observed in the reduction of 2,4-DNT was 2,4-diaminotoluene (2,4-DAT). The 2,4-DAT produced accounted for 83-100% and only 42-54% of the initial mass of 2@4.DNT under anaerobic and aerobic conditions respectively. Since no degradation of 2...

Malla, Deepak Babu

1997-01-01T23:59:59.000Z

18

Electrochemical deposition of green rust on zero-valent iron  

E-Print Network [OSTI]

.............................................. 22 3 Analysis of green rust for content of Fe(II) and Fe(III) after extraction by 0.12 N HCl or Endox ................................................................................................................ 25 4... immersed in seawater and on the hulls of large ships (3). Green rusts are compounds with double-layers of mixed Fe(II)-Fe(III) hydroxides surrounding a layer of anions (A -n ). This structure can be represented by the general formula (Fe II ) 6-x (Fe...

Kulkarni, Dhananjay Vijay

2006-08-16T23:59:59.000Z

19

Demonstration of Combined Zero-Valent Iron and Electrical Resistance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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20

Injection of Zero Valent Iron into an Unconfined Aquifer Using  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Environmental Aspects of Two Volatile Organic Compound Groundwater Treatment Designs at the Rocky Flats Site - 13135  

SciTech Connect (OSTI)

DOE's Rocky Flats Site in Colorado is a former nuclear weapons production facility that began operations in the early 1950's. Because of releases of hazardous substances to the environment, the federally owned property and adjacent offsite areas were placed on the CERCLA National Priorities List in 1989. The final remedy was selected in 2006. Engineered components of the remedy include four groundwater treatment systems that were installed before closure as CERCLA-accelerated actions. Two of the systems, the Mound Site Plume Treatment System and the East Trenches Plume Treatment System, remove low levels of volatile organic compounds using zero-valent iron media, thereby reducing the loading of volatile organic compounds in surface water resulting from the groundwater pathway. However, the zero-valent iron treatment does not reliably reduce all volatile organic compounds to consistently meet water quality goals. While adding additional zero-valent iron media capacity could improve volatile organic compound removal capability, installation of a solar powered air-stripper has proven an effective treatment optimization in further reducing volatile organic compound concentrations. A comparison of the air stripper to the alternative of adding additional zero-valent iron capacity to improve Mound Site Plume Treatment System and East Trenches Plume Treatment System treatment based on several key sustainable remediation aspects indicates the air stripper is also more 'environmentally friendly'. These key aspects include air pollutant emissions, water quality, waste management, transportation, and costs. (authors)

Michalski, Casey C.; DiSalvo, Rick; Boylan, John [Stoller LMS Team, 11025 Dover Street, Suite 1000, Westminster, CO 80021 (United States)] [Stoller LMS Team, 11025 Dover Street, Suite 1000, Westminster, CO 80021 (United States)

2013-07-01T23:59:59.000Z

22

Calcite precipitation dominates the electrical signatures of zero valent iron columns under simulated field conditions  

E-Print Network [OSTI]

of the electrical signatures from magnetite/fougerite vs.electrical properties of the different mineralogies: i.e. conductive and polarizable magnetite/fougerite vs.

Wu, Yuxin

2009-01-01T23:59:59.000Z

23

Aminoclay-templated nanoscale zero-valent iron (nZVI) synthesis for efficient harvesting of  

E-Print Network [OSTI]

of oleaginous microalga, Chlorella sp. KR-1 Young-Chul Lee,ae Kyubock Lee,b Yuhoon Hwang,c Henrik Rasmus ). On the basis of these characteristics, oleaginous Chlorella sp. KR-1 was harvested within 3 min at a > 20 g LÃ?1

Mosegaard, Klaus

24

Dechlorination of PCE by mixtures of green rust and zero-valent iron  

E-Print Network [OSTI]

such as pH (8, 9, and 10), ZVI pretreatment, and preparation method of the mixtures (GR[S]?? synthesized in the presence of ZVI; GR[S]?? and ZVI mixed after preparation). For all the experimental conditions evaluated, the activities of these reductants...

Marchal, Fabienne

2002-01-01T23:59:59.000Z

25

Third (March 2006) Coring and Analysis of Zero-Valent Iron Permeable  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

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26

Mineral Precipitation Upgradient from a Zero-Valent Iron Permeable Reactive  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment SurfacesResource Program PreliminaryA3,0 Alabama - NaturalHanford Tank

27

Zero Valent Iron: Impact of Anions Present during Synthesis on Subsequent  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched FerromagnetismWaste andAnniversary, part 2Zenoss, Version 2.1.3

28

Conversion of Steel Mill's Surface Waste into Zero Valent Iron (ZVI) Nanoparticles for Hydrogen Generation for PEMFCs  

E-Print Network [OSTI]

. The currently pursued modes of hydrogen generation include autothermal and/ or steam reforming of fossil fuels

Azad, Abdul-Majeed

29

Optimization of soil mixing technology through metallic iron addition.  

SciTech Connect (OSTI)

Enhanced soil mixing is a process used to remove volatile organic compounds (VOCs) from soil. In this process, also known as soil mixing with thermally enhanced soil vapor extraction, or SM/TESVE, a soil mixing apparatus breaks up and mixes a column of soil up to 9 m (30 ft) deep; simultaneously, hot air is blown through the soil. The hot air carries the VOCs to the surface where they are collected and safely disposed of. This technology is cost effective at high VOC concentrations, but it becomes cost prohibitive at low concentrations. Argonne National Laboratory-East conducted a project to evaluate ways of improving the effectiveness of this system. The project investigated the feasibility of integrating the SM/TESVE process with three soil treatment processes--soil vapor extraction, augmented indigenous biodegradation, and zero-valent iron addition. Each of these technologies was considered a polishing treatment designed to remove the contaminants left behind by enhanced soil mixing. The experiment was designed to determine if the overall VOC removal effectiveness and cost-effectiveness of the SM/TESVE process could be improved by integrating this approach with one of the polishing treatment systems.

Moos, L. P.

1999-01-15T23:59:59.000Z

30

Effect of thermal treatment on coke reactivity and catalytic iron mineralogy  

SciTech Connect (OSTI)

Iron minerals in coke can catalyze its gasification and may affect coke behavior in the blast furnace. The catalytic behavior of iron depends largely upon the nature of the iron-bearing minerals. To determine the mineralogical changes that iron could undergo in the blast furnace, cokes made from three coals containing iron present in different mineral forms (clays, carbonates, and pyrite) were examined. All coke samples were heat-treated in a horizontal furnace at 1373, 1573, and 1773 K and then gasified with CO{sub 2} at 1173 K in a fixed bed reactor (FBR). Coke mineralogy was characterized using quantitative X-ray diffraction (XRD) analysis of coke mineral matter prepared by low-temperature ashing (LTA) and field emission scanning electron microscopy combined with energy dispersive X-ray analysis (FESEM/EDS). The mineralogy of the three cokes was most notably distinguished by differing proportions of iron-bearing phases. During heat treatment and subsequent gasification, iron-containing minerals transformed to a range of minerals but predominantly iron-silicides and iron oxides, the relative amounts of which varied with heat treatment temperature and gasification conditions. The relationship between initial apparent reaction rate and the amount of catalytic iron minerals - pyrrhotite, metallic iron, and iron oxides - was linear and independent of heat treatment temperature at total catalyst levels below 1 wt %. The study showed that the coke reactivity decreased with increasing temperature of heat treatment due to decreased levels of catalytic iron minerals (largely due to formation of iron silicides) as well as increased ordering of the carbon structure. The study also showed that the importance of catalytic mineral matter in determining reactivity declines as gasification proceeds. 37 refs., 13 figs., 7 tabs.

Byong-chul Kim; Sushil Gupta; David French; Richard Sakurovs; Veena Sahajwalla [University of New South Wales, Sydney, NSW (Australia). Centre for Sustainable Materials Research and Technology

2009-07-15T23:59:59.000Z

31

Aging of Iron (Hydr)oxides by Heat Treatment and Effects on Heavy  

E-Print Network [OSTI]

caused some volatilization of heavy metals (most notably, Hg). Leaching with water at pH 9 (L/S 10, 24 hAging of Iron (Hydr)oxides by Heat Treatment and Effects on Heavy Metal Binding M E T T E A . S Ã? R)oxides are used to remove heavy metals from wastewater and in the treatment of air pollution control residues

Frenkel, Anatoly

32

Fate of As, Se, and Hg in a Passive Integrated System for Treatment of Fossil Plant Wastewater  

SciTech Connect (OSTI)

TVA is collaborating with EPRI and DOE to demonstrate a passive treatment system for removing SCR-derived ammonia and trace elements from a coal-fired power plant wastewater stream. The components of the integrated system consist of trickling filters for ammonia oxidation, reaction cells containing zero-valent iron (ZVI) for trace contaminant removal, a settling basin for storage of iron hydroxide floc, and anaerobic vertical-flow wetlands for biological denitrification. The passive integrated treatment system will treat up to 0.25 million gallons per day (gpd) of flue gas desulfurization (FGD) pond effluent, with a configuration requiring only gravity flow to obviate the need for pumps. The design of the system will enable a comparative evaluation of two parallel treatment trains, with and without the ZVI extraction trench and settling/oxidation basin components. One of the main objectives is to gain a better understanding of the chemical transformations that species of trace elements such as arsenic, selenium, and mercury undergo as they are treated in passive treatment system components with differing environmental conditions. This progress report details the design criteria for the passive integrated system for treating fossil power plant wastewater as well as performance results from the first several months of operation. Engineering work on the project has been completed, and construction took place during the summer of 2005. Monitoring of the passive treatment system was initiated in October 2005 and continued until May 18 2006. The results to date indicate that the treatment system is effective in reducing levels of nitrogen compounds and trace metals. Concentrations of both ammonia and trace metals were lower than expected in the influent FGD water, and additions to increase these concentrations will be done in the future to further test the removal efficiency of the treatment system. In May 2006, the wetland cells were drained of FGD water, refilled with less toxic ash pond water, and replanted due to low survival rates from the first planting the previous summer. The goals of the TVA-EPRI-DOE collaboration include building a better understanding of the chemical transformations that trace elements such as arsenic, selenium, and mercury undergo as they are treated in a passive treatment system, and to evaluate the performance of a large-scale replicated passive treatment system to provide additional design criteria and economic factors.

Terry Yost; Paul Pier; Gregory Brodie

2007-12-31T23:59:59.000Z

33

Coke oven gas treatment and by-product plant of Magnitogorsk Integrated Iron and Steel Works  

SciTech Connect (OSTI)

Magnitogorsk Integrated Iron and Steel Works, Russia, decided to erect a new coke oven gas treatment and by-product plant to replace the existing obsolete units and to improve the environmental conditions of the area. The paper deals with the technological concept and the design requirements. Commissioning is scheduled at the beginning of 1996. The paper describes H{sub 2}S and NH{sub 3} removal, sulfur recovery and ammonia destruction, primary gas cooling and electrostatic tar precipitation, and the distributed control system that will be installed.

Egorov, V.N.; Anikin, G.J. [Magnitogorsk Integrated Iron and Steel Works, (Russian Federation); Gross, M. [Krupp Koppers GmbH, Essen (Germany)

1995-12-01T23:59:59.000Z

34

In situ treatment of mixed contaminants in groundwater: Application of zero-valence iron and palladized iron for treatment of groundwater contaminated with trichloroethene and technetium-99  

SciTech Connect (OSTI)

The overall goal of this portion of the project was to package one or more unit processes, as modular components in vertical and/or horizontal recirculation wells, for treatment of volatile organic compounds (VOCs) [e.g., trichloroethene (TCE)] and radionuclides [e.g., technetium (Tc){sup 99}] in groundwater. The project was conceived, in part, because the coexistence of chlorinated hydrocarbons and radionuclides has been identified as the predominant combination of groundwater contamination in the US Department of Energy (DOE) complex. Thus, a major component of the project was the development of modules that provide simultaneous treatment of hydrocarbons and radionuclides. The project objectives included: (1) evaluation of horizontal wells for inducing groundwater recirculation, (2) development of below-ground treatment modules for simultaneous removal of VOCs and radionuclides, and (3) demonstration of a coupled system (treatment module with recirculation well) at a DOE field site where both VOCs and radionuclides are present in the groundwater. This report is limited to the innovative treatment aspects of the program. A report on pilot testing of the horizontal recirculation system was the first report of the series (Muck et al. 1996). A comprehensive report that focuses on the engineering, cost and hydrodynamic aspects of the project has also been prepared (Korte et al. 1997a).

Korte, N.E.; Muck, M.T.; Zutman, J.L.; Schlosser, R.M. [Oak Ridge National Lab., Grand Junction, CO (United States); Liang, L.; Gu, B. [Oak Ridge National Lab., TN (United States). Environmental Sciences Div.; Siegrist, R.L. [Oak Ridge National Lab., TN (United States). Environmental Sciences Div.; [Colorado School of Mines, Golden, CO (United States); Houk, T.C. [Portsmouth Gaseous Diffusion Plant, Piketon, OH (United States); Fernando, Q. [Univ. of Arizona, Tucson, AZ (United States)

1997-04-01T23:59:59.000Z

35

Tuning of the spin pumping in yttrium iron garnet/Au bilayer system by fast thermal treatment  

SciTech Connect (OSTI)

In this Letter, we investigated the influence of the fast thermal treatment on the spin pumping in ferromagnetic insulator yttrium iron garnet (YIG)/normal metal Au bilayer system. The YIG/Au bilayer thin films were treated by fast annealing process with different temperatures from 0 to 800?°C. The spin pumping was studied using ferromagnetic resonance. The surface evolution was investigated using a high resolution scanning microscopy and an atomic force microscopy. A strong thermal related spin pumping in YIG/Au bilayer system has been revealed. It was found that the spin pumping process can be enhanced by using fast thermal treatment due to the thermal modifications of the Au surface. The effective spin-mixing conductance of the fast thermal treated YIG/Au bilayer has been obtained.

Jin, Lichuan, E-mail: lichuanj@udel.edu, E-mail: hwzhang@uestc.edu.cn; Zhang, Huaiwu, E-mail: lichuanj@udel.edu, E-mail: hwzhang@uestc.edu.cn; Yang, Qinghui; Tang, Xiaoli; Zhong, Zhiyong [State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology, Chengdu 610054 (China); Zhang, Dainan [Department of Electrical and Computer Engineering, University of Delaware, Newark, Delaware 19716 (United States); Xiao, John Q. [Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 (United States)

2014-05-07T23:59:59.000Z

36

Iron-based alloy and nitridation treatment for PEM fuel cell bipolar plates  

DOE Patents [OSTI]

A corrosion resistant electrically conductive component that can be used as a bipolar plate in a PEM fuel cell application is composed of an alloy substrate which has 10-30 wt. % Cr, 0.5 to 7 wt. % V, and base metal being Fe, and a continuous surface layer of chromium nitride and vanadium nitride essentially free of base metal. A oxide layer of chromium vanadium oxide can be disposed between the alloy substrate and the continuous surface nitride layer. A method to prepare the corrosion resistant electrically conductive component involves a two-step nitridization sequence by exposing the alloy to a oxygen containing gas at an elevated temperature, and subsequently exposing the alloy to an oxygen free nitrogen containing gas at an elevated temperature to yield a component where a continuous chromium nitride layer free of iron has formed at the surface.

Brady, Michael P. (Oak Ridge, TN) [Oak Ridge, TN; Yang, Bing (Oak Ridge, TN) [Oak Ridge, TN; Maziasz, Philip J. (Oak Ridge, TN) [Oak Ridge, TN

2010-11-09T23:59:59.000Z

37

Performance of a Permeable Reactive Barrier Using Granular Zero-Valent  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Careerlumens_placard-green.epsEnergy1.pdfMarket | Department of Energy Reviews thePerformance

38

Comparative study of genotoxicity and tissue distribution of nano and micron sized iron oxide in rats after acute oral treatment  

SciTech Connect (OSTI)

Though nanomaterials (NMs) are being utilized worldwide, increasing use of NMs have raised concerns over their safety to human health and environment. Iron oxide (Fe{sub 2}O{sub 3}) NMs have important applications. The aim of this study was to assess the genotoxicity of Fe{sub 2}O{sub 3}-30 nm and Fe{sub 2}O{sub 3}-bulk in female Wistar rats. Fe{sub 2}O{sub 3}-30 nm was characterized by using transmission electron microscopy, dynamic light scattering, laser Doppler velocimetry and surface area analysis. The rats were treated orally with the single doses of 500, 1000, 2000 mg/kg bw of Fe{sub 2}O{sub 3}-30 nm and Fe{sub 2}O{sub 3} –bulk. The genotoxicity was evaluated at 6, 24, 48 and 72 h by the comet assay in leucocytes, 48 and 72 h by micronucleus test (MNT) in peripheral blood cells, 18 and 24 h by chromosomal aberration (CA) assay and 24 and 48 h by MNT in bone marrow cells. The biodistribution of iron (Fe) was carried out at 6, 24, 48 and 72 h after treatment in liver, spleen, kidney, heart, brain, bone marrow, urine and feces by using atomic absorption spectrophotometry. The % tail DNA, frequencies of micronuclei and CAs were statistically insignificant (p > 0.05) at all doses. These results suggest that Fe{sub 2}O{sub 3}-30 nm and Fe{sub 2}O{sub 3}-bulk was not genotoxic at the doses tested. Bioavailability of Fe was size and dose dependent in all the tissues from the groups exposed to Fe{sub 2}O{sub 3}-30 nm. Fe{sub 2}O{sub 3} NMs were able to enter in the organs and the rats are biocompatible with much higher concentration of Fe. However, the accumulated Fe did not cause significant genotoxicity. This study provides additional knowledge about the toxicology of Fe{sub 2}O{sub 3} NMs. -- Highlights: ? Fe{sub 2}O{sub 3}-30 nm and Fe{sub 2}O{sub 3}-bulk were orally administered to rats with single doses. ? The nano and bulk Fe{sub 2}O{sub 3} showed insignificant results with MNT, comet and CA assays. ? The bulk was excreted via feces whereas the NMs were found both in urine and feces. ? The NMs mainly accumulated in the liver, spleen, kidney, heart and bone marrow. ? However the accumulated Fe did not cause significant genotoxicological effects.

Singh, Shailendra Pratap; Rahman, M.F.; Murty, U.S.N.; Mahboob, M.; Grover, Paramjit, E-mail: paramgrover@gmail.com

2013-01-01T23:59:59.000Z

39

Field Projects: Monticello, Utah  

Broader source: Energy.gov [DOE]

A permeable reactive barrier (PRB) of zero-valent iron is helping to clean up groundwater at a former uranium and vanadium ore processing mill at Monticello, Utah. LM managed remediation of...

40

Field Projects: Cañon City, Colorado  

Broader source: Energy.gov [DOE]

In June 2000, Cotter Corporation installed a PRB at its uranium ore processing millsite in Cañon City, Colorado. The PRB contains zero-valent iron (ZVI) that treated molybdenum and uranium...

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Process for the synthesis of iron powder  

DOE Patents [OSTI]

A process for preparing iron powder suitable for use in preparing the iron-potassium perchlorate heat-powder fuel mixture used in thermal batteries, comprises preparing a homogeneous, dense iron oxide hydroxide precipitate by homogeneous precipitation from an aqueous mixture of a ferric salt, formic or sulfuric acid, ammonium hydroxide and urea as precipitating agent; and then reducing the dense iron oxide hydroxide by treatment with hydrogen to prepare the iron powder. 2 figs.

Welbon, W.W.

1983-11-08T23:59:59.000Z

42

Process for the synthesis of iron powder  

DOE Patents [OSTI]

A process for preparing iron powder suitable for use in preparing the iron-potassium perchlorate heat-powder fuel mixture used in thermal batteries, comprises preparing a homogeneous, dense iron oxide hydroxide precipitate by homogeneous precipitation from an aqueous mixture of a ferric salt, formic or sulfuric acid, ammonium hydroxide and urea as precipitating agent; and then reducing the dense iron oxide hydroxide by treatment with hydrogen to prepare the iron powder.

Not Available

1982-03-06T23:59:59.000Z

43

Activation of Hydrogen Peroxide by Iron-Containing Minerals and Catalysts in Circumneutral pH Solutions: Implications for ex situ and in situ Treatment of Contaminated Water and Soil  

E-Print Network [OSTI]

iron and oxygen. Environmental Science & Technology 2008,iron and oxygen. Environmental Science & Technology 2008,

Pham, Anh

2012-01-01T23:59:59.000Z

44

Microbial reduction of iron ore  

DOE Patents [OSTI]

A process is provided for reducing iron ore by treatment with microorganisms which comprises forming an aqueous mixture of iron ore, microorganisms operable for reducing the ferric iron of the iron ore to ferrous iron, and a substrate operable as an energy source for the microbial reduction; and maintaining the aqueous mixture for a period of time and under conditions operable to effect the reduction of the ore. Preferably the microorganism is Pseudomonas sp. 200 and the reduction conducted anaerobically with a domestic wastewater as the substrate. An aqueous solution containing soluble ferrous iron can be separated from the reacted mixture, treated with a base to precipitate ferrous hydroxide which can then be recovered as a concentrated slurry.

Hoffmann, Michael R. (Pasadena, CA); Arnold, Robert G. (Pasadena, CA); Stephanopoulos, Gregory (Pasadena, CA)

1989-01-01T23:59:59.000Z

45

Microbial reduction of iron ore  

DOE Patents [OSTI]

A process is provided for reducing iron ore by treatment with microorganisms which comprises forming an aqueous mixture of iron ore, microorganisms operable for reducing the ferric iron of the iron ore to ferrous iron, and a substrate operable as an energy source for the microbial reduction; and maintaining the aqueous mixture for a period of time and under conditions operable to effect the reduction of the ore. Preferably the microorganism is Pseudomonas sp. 200 and the reduction conducted anaerobically with a domestic wastewater as the substrate. An aqueous solution containing soluble ferrous iron can be separated from the reacted mixture, treated with a base to precipitate ferrous hydroxide which can then be recovered as a concentrated slurry. 11 figs.

Hoffmann, M.R.; Arnold, R.G.; Stephanopoulos, G.

1989-11-14T23:59:59.000Z

46

Iron and Prochlorococcus/  

E-Print Network [OSTI]

Iron availability and primary productivity in the oceans are intricately linked through photosynthesis. At the global scale we understand how iron addition induces phytoplankton blooms through meso-scale iron-addition ...

Thompson, Anne Williford

2009-01-01T23:59:59.000Z

47

Advanced hydraulic fracturing methods to create in situ reactive barriers  

SciTech Connect (OSTI)

This article describes the use of hydraulic fracturing to increase permeability in geologic formations where in-situ remedial action of contaminant plumes will be performed. Several in-situ treatment strategies are discussed including the use of hydraulic fracturing to create in situ redox zones for treatment of organics and inorganics. Hydraulic fracturing methods offer a mechanism for the in-situ treatment of gently dipping layers of reactive compounds. Specialized methods using real-time monitoring and a high-energy jet during fracturing allow the form of the fracture to be influenced, such as creation of assymmetric fractures beneath potential sources (i.e. tanks, pits, buildings) that should not be penetrated by boring. Some examples of field applications of this technique such as creating fractures filled with zero-valent iron to reductively dechlorinate halogenated hydrocarbons, and the use of granular activated carbon to adsorb compounds are discussed.

Murdoch, L. [FRX Inc., Cincinnati, OH (United States)]|[Clemson Univ., SC (United States). Dept. of Geological Sciences; Siegrist, B.; Meiggs, T. [Oak Ridge National Lab., TN (United States)] [and others

1997-12-31T23:59:59.000Z

48

Investigating Iron Ions | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Investigating Iron Ions Investigating Iron Ions Computer code provides detailed predictions of highly charged ions in water Using resources at EMSL, scientists obtained...

49

Solid-phase synthesis of high-alumina cements by high-temperature treatment on the surface of molten cast iron  

SciTech Connect (OSTI)

The use of block and monolithic concreting technology in the construction of thermal power plants together with the technical and economic advantages arising from the use of high-alumina cements in the production of refractory concretes have made the development of new methods for the production of high-alumina cement clinkers mandatory. To this end the authors of this paper study the kinetics of synthesis of such clinkers obtained by their firing on the surface of molten cast iron as the heat transfer agent. Among the results presented are a structural and quantitative analysis of the clinker along with phase and activation energy studies.

Fedorov, N.F.; Gavrilov, A.P.; Ivanov, N.I.; Khalina, O.M.

1986-09-10T23:59:59.000Z

50

Acetylene Inhibition of Trichloroethene and Vinyl Chloride  

E-Print Network [OSTI]

and enhanced anaerobic remediation of chloroethenes at contaminated sites. The results also suggest that acetylene produced abiotically by reactions of chlorinated ethenes with zero-valent iron could inhibit water standard (2 µg/L) (3). A variety of biochemical tools have been used to probe the complexity

Semprini, Lewis

51

Bioremediation of Uranium Plumes with Nano-scale  

E-Print Network [OSTI]

(IV) (UO2[s], uraninite) Anthropogenic · Release of mill tailings during uranium mining - MobilizationBioremediation of Uranium Plumes with Nano-scale Zero-valent Iron Angela Athey Advisers: Dr. Reyes Undergraduate Student Fellowship Program April 15, 2011 #12;Main Sources of Uranium Natural · Leaching from

Fay, Noah

52

Technical Assistance to Ohio Closure Sites Technologies to Address Excavated VOC Contaminated Soil  

E-Print Network [OSTI]

and available solar heat. This report focuses on design features and recommendations for implementing disposal, passive soil venting, enhanced soil venting, zero-valent iron, anaerobic bioremediation, aerobic and functional design requirements (equipment, flow rates, options, issues, cautions, etc.).The design

Hazen, Terry

53

Dispersion enhanced metal/zeolite catalysts  

DOE Patents [OSTI]

Dispersion stabilized zeolite supported metal catalysts are provided as bimetallic catalyst combinations. The catalyst metal is in a reduced zero valent form while the dispersion stabilizer metal is in an unreduced ionic form. Representative catalysts are prepared from platinum or nickel as the catalyst metal and iron or chromium dispersion stabilizer.

Sachtler, W.M.H.; Tzou, M.S.; Jiang, H.J.

1987-03-31T23:59:59.000Z

54

Treatability study for removal of leachable mercury in crushed fluorescent lamps  

SciTech Connect (OSTI)

Nonserviceable fluorescent lamps removed from radiological control areas at the Oak Ridge Department of Energy facilities have been crushed and are currently managed as mixed waste (hazardous and radiologically contaminated). We present proposed treatment flowsheets and supporting treatability study data for conditioning this solid waste residue so that it can qualify for disposal in a sanitary landfill. Mercury in spent fluorescent lamps occurs primarily as condensate on high-surface-area phosphor material. It can be solubilized with excess oxidants (e.g., hypochlorite solution) and stabilized by complexation with halide ions. Soluble mercury in dechlorinated saline solution is effectively removed by cementation with zero-valent iron in the form of steel wool. In packed column dynamic flow testing, soluble mercury was reduced to mercury metal and insoluble calomel, loading > 1.2 g of mercury per grain of steel wool before an appreciable breakthrough of soluble mercury in the effluent.

Bostick, W.D.; Beck, D.E.; Bowser, K.T. [and others

1996-02-01T23:59:59.000Z

55

Grow Iron, Slow Pollution | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Grow Iron, Slow Pollution Grow Iron, Slow Pollution Scientists connect previous studies on electron transport in hematite Making a Deposit: Scanning electron micrographs of...

56

Response of zinc, iron and copper status parameters to supplementation with zinc or zinc and iron in women  

SciTech Connect (OSTI)

Supplementation with zinc at levels available over-the-counter may compromise iron or copper status. This study examined the effects of zinc(50mg/day) or zinc and iron(50 mg each/day) on 18 women aged 25-40. Subjects were matched on initial levels of serum ferritin(SF) and erythrocyte superoxide dismutase(ESOD) and randomly assigned to Group Z (zinc) or F-Z (iron and zinc). The following were measured pretreatment and after 6 and 10 weeks treatment: serum zinc (BZ), salivary sediment zinc (SSZ), hemoglobin (Hgb), hematocrit (Hct), SF, serum ceruloplasmin (Cp) and ESOD. Effects of treatment and weeks of treatment on changes from initial blood and saliva levels were analyzed using AOV. BZ increased (P=0.0144) and ESOD decreased (P=0.0001) with weeks of treatment. Differences due to treatment are presented. No effects were noted on Hgb, Hct or Cp. Intakes of zinc supplements at about 4X RDA appear to decrease copper(ESOD) and iron(SF) status. Use of iron w/zinc may be protective for FE but not Cu, and may compromise zinc (SSZ) status.

Yadrick, K.; Kenney, M.A.; Winterfeldt, E.

1986-03-05T23:59:59.000Z

57

Residual stress measurement on ductile cast iron using critically refracted longitudinal (Lcr) wave technique  

E-Print Network [OSTI]

of requirements for the degree of MASTER OF SCIENCE December 1991 Major Subject: Mechanical Engineering RESIDUAL STRESS MEASUREMENT IN DUCTILE CAST IRON USING CRITICALLY REFRACTED LONGITUDINAL (Lcm) WAVE TECHNIQUE A Thesis by SRINIVASULU NAIDU CHUNDU.... In an attempt to study the effect of heat-treatment on the acoustoelastic behavior of ductile cast iron, four continuously cast ductile iron bars were investigated. While one bar was retained as-cast, the other three bars were subjected to heat...

Chundu, Srinivasulu Naidu

1991-01-01T23:59:59.000Z

58

Formation Damage due to Iron Precipitation in Acidizing Operations and Evaluating GLDA as a Chelating Agent  

E-Print Network [OSTI]

Iron control during acidizing plays a key role in the success of matrix treatment. Ferric ion precipitates in the formation once the acid is spent and the pH exceeds 1-2. Precipitation of iron (III) within the formation can cause formation damage...

Mittal, Rohit

2012-02-14T23:59:59.000Z

59

Iron pages of HTSC  

SciTech Connect (OSTI)

Experimental data are presented on the superconducting and electronic properties of iron-based high-temperature superconductors in the normal and superconducting states. The following topics are discussed: lattice structure; structure of magnetic vortices; magnetic penetration depth; Fermi surface; isotope effect; and critical magnetic fields both in oxide compounds of 1111 type and oxide-free compounds of 122, 111, and 011 types as a function of the doping level, temperature, and external pressure.

Gasparov, V. A., E-mail: vgasparo@issp.ac.r [Russian Academy of Sciences, Institute of Solid State Physics (Russian Federation)

2010-08-15T23:59:59.000Z

60

Effects of High Dietary Iron and Gamma Radiation on Oxidative Stress and Bone  

E-Print Network [OSTI]

(induced by feeding a high iron diet) and gamma radiation exposure would independently increase markers of oxidative stress and markers of oxidative damage and result in loss of bone mass, with the combined treatment having additive or synergistic effects...

Yuen, Evelyn P

2013-04-19T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Seal welded cast iron nuclear waste container  

DOE Patents [OSTI]

This invention identifies methods and articles designed to circumvent metallurgical problems associated with hermetically closing an all cast iron nuclear waste package by welding. It involves welding nickel-carbon alloy inserts which are bonded to the mating plug and main body components of the package. The welding inserts might be bonded in place during casting of the package components. When the waste package closure weld is made, the most severe thermal effects of the process are restricted to the nickel-carbon insert material which is far better able to accommodate them than is cast iron. Use of nickel-carbon weld inserts should eliminate any need for pre-weld and post-weld heat treatments which are a problem to apply to nuclear waste packages. Although the waste package closure weld approach described results in a dissimilar metal combination, the relative surface area of nickel-to-iron, their electrochemical relationship, and the presence of graphite in both materials will act to prevent any galvanic corrosion problem.

Filippi, Arthur M. (Pittsburgh, PA); Sprecace, Richard P. (Murrysville, PA)

1987-01-01T23:59:59.000Z

62

Iron efficiency in sorghum  

E-Print Network [OSTI]

) James Craig Esty, B, S. , Panhandle State College Co-Chairmen of Advisory Committee: Dr. Arthur B. Onken Dr. Lloyd R. Hossner R tt *ht ' d f * ' g * gh L~Sh bicolor (L. ) Moenchj parental lines and Fl hybrids indicate varying degrees of iron (Fe...) utilization. Visual ratings after seven days of Fe stress indicated only one hybrid, ATx 378 x RTx 2536, to be green or Fe efficient. Hybrids or parental lines rated partially chlorotic were: ATx 378 x RTx 415 and RTx 2536. Those sorghums rated chlorotic...

Esty, James Craig

1979-01-01T23:59:59.000Z

63

Electron Correlation in Iron-Based Superconductors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Electron Correlation in Iron-Based Superconductors Print In 2008, the discovery of iron-based superconductors stimulated a worldwide burst of activity, leading to about two...

64

Eosinophilic fasciitis secondary to intravenous iron infusions  

E-Print Network [OSTI]

secondary to intravenous iron infusions Bahar F Firoz MD MPHfour weeks after receiving intravenous iron infusions atmultiple infusion sites along the right proximal forearm.

Firoz, Bahar F; Goldberg, Leonard H; Landau, Jennifer; Kaye, Valda; Berman, Louis

2010-01-01T23:59:59.000Z

65

Transcriptional and translational regulatory responses to iron...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Candidatus Pelagibacter ubique cultures to iron limitation in natural seawater media supplemented with a siderophore to chelate iron. MethodologyPrincipal Findings:...

66

Verification of Steelmaking Slags Iron Content Final Technical Progress Report  

SciTech Connect (OSTI)

The steel industry in the United States generates about 30 million tons of by-products each year, including 6 million tons of desulfurization and BOF/BOP slag. The recycling of BF (blast furnace) slag has made significant progress in past years with much of the material being utilized as construction aggregate and in cementitious applications. However, the recycling of desulfurization and BOF/BOP slags still faces many technical, economic, and environmental challenges. Previous efforts have focused on in-plant recycling of the by-products, achieving only limited success. As a result, large amounts of by-products of various qualities have been stockpiled at steel mills or disposed into landfills. After more than 50 years of stockpiling and landfilling, available mill site space has diminished and environmental constraints have increased. The prospect of conventionally landfilling of the material is a high cost option, a waste of true national resources, and an eternal material liability issue. The research effort has demonstrated that major inroads have been made in establishing the viability of recycling and reuse of the steelmaking slags. The research identified key components in the slags, developed technologies to separate the iron units and produce marketable products from the separation processes. Three products are generated from the technology developed in this research, including a high grade iron product containing about 90%Fe, a medium grade iron product containing about 60% Fe, and a low grade iron product containing less than 10% Fe. The high grade iron product contains primarily metallic iron and can be marketed as a replacement of pig iron or DRI (Direct Reduced Iron) for steel mills. The medium grade iron product contains both iron oxide and metallic iron and can be utilized as a substitute for the iron ore in the blast furnace. The low grade iron product is rich in calcium, magnesium and iron oxides and silicates. It has a sufficient lime value and can be utilized for acid mine drainage treatment. Economic analysis from this research demonstrates that the results are favorable. The strong demand and the increase of price of the DRI and pig iron in recent years are particularly beneficial to the economics. The favorable economics has brought commercial interests. ICAN Global has obtained license agreement on the technology from Michigan Tech. This right was later transferred to the Westwood Land, Inc. A demonstration pilot plant is under construction to evaluate the technology. Steel industry will benefit from the new supply of the iron units once the commercial plants are constructed. Environmental benefits to the public and the steel industry will be tremendous. Not only the old piles of the slag will be removed, but also the federal responsible abandoned mines from the old mining activities can be remediated with the favorable product generated from the process. Cost can be reduced and there will be no lime required, which can avoid the release of carbon dioxide from lime production process.

J.Y. Hwang

2006-10-04T23:59:59.000Z

67

Comparison of gleptoferron iron compound to two commonly used iron supplements for the prevention of baby pig anemia  

E-Print Network [OSTI]

wk of age. Wahlstrom and Juhl (1960) demonstrated that injecting baby pi gs dur- ing the first d of life with iron dextran (100 mg) resulted in higher hemoglobin values at 10, 21, and 28 d and heavier pigs at 28 d than when an oral pill (292 mg... and treatment of baby pig anemia. J. Anim. Sci. 16:1038. Wahlstrom, R. C. and E. W. Juhl. 1960. A comparison of different methods of iron administration on rate of gain and hemoglobin level of the baby pig . J . Anim. Sci . 1 9: 1 83. Zimmerman, D. R. , V. C...

Homann, Ervin R.

2012-06-07T23:59:59.000Z

68

Phase 1 report on the Bear Creek Valley treatability study, Oak Ridge Y-12 Plant, Oak Ridge, Tennessee  

SciTech Connect (OSTI)

Bear Creek Valley (BCV) is located within the US Department of Energy (DOE) Oak Ridge Reservation and encompasses multiple waste units containing hazardous and radioactive wastes associated with past operations at the adjacent Oak Ridge Y-12 Plant. The BCV Remedial Investigation determined that disposal of wastes at the S-3 Site, Boneyard/Burnyard (BYBY), and Bear Creek Burial Grounds (BCBG) has caused contamination of both deep and shallow groundwater. The primary contaminants include uranium, nitrate, and VOCs, although other metals such as aluminum, magnesium, and cadmium persist. The BCV feasibility study will describe several remedial options for this area, including both in situ and ex situ treatment of groundwater. This Treatability Study Phase 1 Report describes the results of preliminary screening of treatment technologies that may be applied within BCV. Four activities were undertaken in Phase 1: field characterization, laboratory screening of potential sorbents, laboratory testing of zero valent iron products, and field screening of three biological treatment systems. Each of these activities is described fully in technical memos attached in Appendices A through G.

NONE

1997-04-01T23:59:59.000Z

69

Method for reducing iron losses in an iron smelting process  

DOE Patents [OSTI]

A process of smelting iron that comprises the steps of: a) introducing a source of iron oxide, oxygen, nitrogen, and a source of carbonaceous fuel to a smelting reactor, at least some of said oxygen being continuously introduced through an overhead lance; b) maintaining conditions in said reactor to cause (i) at least some of the iron oxide to be chemically reduced, (ii) a bath of molten iron to be created and stirred in the bottom of the reactor, surmounted by a layer of slag, and (iii) carbon monoxide gas to rise through the slag; c) causing at least some of said carbon monoxide to react in the reactor with the incoming oxygen, thereby generating heat for reactions taking place in the reactor; and d) releasing from the reactor an offgas effluent, is run in a way that keeps iron losses in the offgas relatively low. After start-up of the process is complete, steps (a) and (b) are controlled so as to: e) keep the temperature of the molten iron at or below about 1550.degree. C. and f) keep the slag weight at or above about 0.8 tonne per square meter.

Sarma, Balu (Airmont, NY); Downing, Kenneth B. (Greenville, SC)

1999-01-01T23:59:59.000Z

70

Method for reducing iron losses in an iron smelting process  

DOE Patents [OSTI]

A process of smelting iron that comprises the steps of: (a) introducing a source of iron oxide, oxygen, nitrogen, and a source of carbonaceous fuel to a smelting reactor, at least some of said oxygen being continuously introduced through an overhead lance; (b) maintaining conditions in said reactor to cause (1) at least some of the iron oxide to be chemically reduced, (2) a bath of molten iron to be created and stirred in the bottom of the reactor, surmounted by a layer of slag, and (3) carbon monoxide gas to rise through the slag; (c) causing at least some of said carbon monoxide to react in the reactor with the incoming oxygen, thereby generating heat for reactions taking place in the reactor; and (d) releasing from the reactor an offgas effluent, is run in a way that keeps iron losses in the offgas relatively low. After start-up of the process is complete, steps (a) and (b) are controlled so as to: (1) keep the temperature of the molten iron at or below about 1550 C and (2) keep the slag weight at or above about 0.8 ton per square meter. 13 figs.

Sarma, B.; Downing, K.B.

1999-03-23T23:59:59.000Z

71

Iron and Steel Energy Intensities  

U.S. Energy Information Administration (EIA) Indexed Site

If you are having trouble, call 202-586-8800 for help. Home > >Energy Users > Energy Efficiency Page > Iron and Steel Energy Intensities First Use of Energy Blue Bullet First Use...

72

Explorations of iron-iron hydrogenase active site models by experiment and theory  

E-Print Network [OSTI]

This dissertation describes computational and experimental studies of synthetic complexes that model the active site of the iron-iron hydrogenase [FeFe]H2ase enzyme. Simple dinuclear iron dithiolate complexes act as functional models of the ironiron...

Tye, Jesse Wayne

2009-05-15T23:59:59.000Z

73

Fabrication and processing of iron aluminides  

SciTech Connect (OSTI)

The Fe{sub 3}Al-based alloys have been shown to exhibit room-temperature ductility values of 15 to 19% by the control of composition and thermomechanical processing steps. The scale-up of one of the compositions to 2270-kg (5000-lb) electroslag-remelted (ESR) round ingot and 3272-kg (7200-lb) vacuum-induction-melted (VIM) slab ingot is described. Microstructural and mechanical property data are presented on small pieces sectioned from these ingots. The effects of final rolling temperature and the final annealing treatment on room-temperature ductility were investigated for the ESR ingot. A study of iron-aluminide binary alloys revealed that the environmental effects on room-temperature ductility values were absent for {le}8.5 wt % Al. The increasing aluminum content and the development of ordered structure resulted in increased environmental effects. Applications and a brief description of their status are described. Based on the combined property and cost advantage, continued development of iron aluminide is recommended.

Sikka, V.K.; Viswanathan, S.

1992-01-01T23:59:59.000Z

74

Fabrication and processing of iron aluminides  

SciTech Connect (OSTI)

The Fe{sub 3}Al-based alloys have been shown to exhibit room-temperature ductility values of 15 to 19% by the control of composition and thermomechanical processing steps. The scale-up of one of the compositions to 2270-kg (5000-lb) electroslag-remelted (ESR) round ingot and 3272-kg (7200-lb) vacuum-induction-melted (VIM) slab ingot is described. Microstructural and mechanical property data are presented on small pieces sectioned from these ingots. The effects of final rolling temperature and the final annealing treatment on room-temperature ductility were investigated for the ESR ingot. A study of iron-aluminide binary alloys revealed that the environmental effects on room-temperature ductility values were absent for {le}8.5 wt % Al. The increasing aluminum content and the development of ordered structure resulted in increased environmental effects. Applications and a brief description of their status are described. Based on the combined property and cost advantage, continued development of iron aluminide is recommended.

Sikka, V.K.; Viswanathan, S.

1992-07-01T23:59:59.000Z

75

Absorption of Iron from Ferritin Is Independent of Heme Iron and Ferrous Salts in Women and Rat Intestinal Segments .  

E-Print Network [OSTI]

??Ferritin iron from food is readily bioavailable to humans and has the potential for treating iron deficiency. Whether ferritin iron absorption is mechanistically different from… (more)

Theil, Elizabeth C.

2012-01-01T23:59:59.000Z

76

Correcting Iron Deficiencies in Grain Sorghum  

E-Print Network [OSTI]

Until grain sorghum develops an extensive root system, young plants may be unable to obtain enough ferrous iron to maintain normal growth. This publication offers strategies for avoiding, identifying and correcting iron deficiencies....

Livingston, Stephen; Coffman, Cloyce G.; Unruh, L. G.

1996-02-20T23:59:59.000Z

77

Influence of Iron Redox Transformations on Plutonium Sorption to Sediments  

SciTech Connect (OSTI)

Plutonium subsurface mobility is primarily controlled by its oxidation state, which in turn is loosely coupled to the oxidation state of iron in the system. Experiments were conducted to examine the effect of sediment iron mineral composition and oxidation state on plutonium sorption and oxidation state. A pH 6.3 vadose zone sediment containing iron oxides and iron-containing phyllosilicates was treated with various complexants (ammonium oxalate) and reductants (dithionite-citrate-bicarbonate) to selectively leach and/or reduce iron oxide and phyllosilicate phases. Mössbauer spectroscopy was used to identify initial iron mineral composition of the sediment and monitor dissolution and reduction of iron oxides. Sorption of Pu(V) was monitored over one week for each of six treated sediment fractions. Plutonium oxidation state speciation in the aqueous and solid phases was monitored using solvent extraction, coprecipitation, and XANES. Mössbauer spectroscopy showed that the sediment contained 25-30% hematite, 60-65% Al-goethite, and <10%Fe(III) in phyllosilicate; there was no detectable Fe(II). Upon reduction with a strong chemical reductant (dithionite-citrate buffer, DCB), much of the hematite and goethite disappeared and the Fe in the phyllosilicate reduced to Fe(II). The rate of sorption was found to correlate with the 1 fraction of Fe(II) remaining within each treated sediment phase. Pu(V) was the only oxidation state measured in the aqueous phase, irrespective of treatment, whereas Pu(IV) and much smaller amounts of Pu(V) and Pu(VI) were measured in the solid phase. Surface-mediated reduction of Pu(V) to Pu(IV) occurred in treated and untreated sediment samples; Pu(V) remained on untreated sediment surface for two days before reducing to Pu(IV). Similar to the sorption kinetics, the reduction rate was correlated with sediment Fe(II) concentration. The correlation between Fe(II) concentrations and Pu(V) reduction demonstrates the potential impact of changing iron mineralogy on plutonium subsurface transport through redox transition areas. These findings should influence the conceptual models of long-term stewardship of Pu contaminated sites that have fluctuating redox conditions, such as vadose zones or riparian zones.

Hixon, Amy E.; Hu, Yung-Jin; Kaplan, Daniel I.; Kukkadapu, Ravi K.; Nitsche, Heino; Qafoku, Odeta; Powell, Brian A.

2010-10-01T23:59:59.000Z

78

Ligand iron catalysts for selective hydrogenation  

DOE Patents [OSTI]

Disclosed are iron ligand catalysts for selective hydrogenation of aldehydes, ketones and imines. A catalyst such as dicarbonyl iron hydride hydroxycyclopentadiene) complex uses the OH on the five member ring and hydrogen linked to the iron to facilitate hydrogenation reactions, particularly in the presence of hydrogen gas.

Casey, Charles P. (Madison, WI); Guan, Hairong (Cincinnati, OH)

2010-11-16T23:59:59.000Z

79

Maraging superalloys and heat treatment processes  

DOE Patents [OSTI]

Described herein are nickel-chromium-iron maraging, gamma prime strengthened superalloys containing about 18 to 25 weight percent nickel, about 4 to 8 weight percent chromium, gamma prime forming elements such as aluminum and/or titanium, and a solid solution strengthening element, such as molybdenum. After heat treatment, which includes at least one ausaging treatment and at least one maraging treatment, a microstructure containing gamma prime phase and decomposed Fe-Ni-Cr type martensite is produced.

Korenko, Michael K. (Wexford, PA); Gelles, David S. (W. Richland, WA); Thomas, Larry E. (Richland, WA)

1986-01-01T23:59:59.000Z

80

Iron production maintenance effectiveness system  

SciTech Connect (OSTI)

In 1989, an internal study in the Coke and Iron Maintenance Department identified the opportunities available to increase production, by decreasing unscheduled maintenance delays from 4.6%. A five year front loaded plan was developed, and presented to the company president. The plan required an initial investment of $1.4 million and a conservative break-even point was calculated to be 2.5 years. Due to budget restraints, it would have to be self-funded, i.e., generate additional production or savings, to pay for the program. The program began in 1991 at number 2 coke plant and the blast furnaces. This paper will describe the Iron Production Maintenance Effectiveness System (ME), which began with the mechanical and pipefitting trades.

Augstman, J.J. [Dofasco Inc., Hamilton, Ontario (Canada)

1996-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Performance Optimization of Metallic Iron and Iron Oxide Nanomaterials for Treatment of Impaired Water Supplies  

E-Print Network [OSTI]

J. -Y. ; Kang, J. -K. , Hydrogen Storage in Ni Nanoparticle-J. -Y. ; Kang, J. -K. , Hydrogen Storage in Ni Nanoparticle-Wu, Y.L. ; Yu, H. , Hydrogen Storage in Multi-Wall Carbon

Xie, Yang

2011-01-01T23:59:59.000Z

82

Evaluation and Treatment of Iron Deficiency Anemia: A Gastroenterological Perspective  

E-Print Network [OSTI]

autoimmune gastritis, Helicobacter pylori and celiac diseaseinfection with Helicobacter pylori or autoimmune gastritis,Atrophic gastritis Helicobacter pylori chronic gastritis

Zhu, Amy; Kaneshiro, Marc; Kaunitz, Jonathan D.

2010-01-01T23:59:59.000Z

83

Iron speciation and its biological availability in seawater: A workshop  

SciTech Connect (OSTI)

This workshop brought together marine chemists with expertise in iron chemistry and biologists with expertise in the role of iron in phytoplankton production to discuss controversies regarding the role of iron in oceanic primary productivity and global climatic change. A new paradigm for marine iron biogeochemistry was generated. The five major new items within this paradigm included (1) the nature of iron inputs to the sea, (2) chemical speciation of iron in seawater, (3) relationships between iron chemistry and marine microbial community dynamics, (4) adaptations of marine microbes to iron input, and (5) ecological and biogeochemical implications of changes in iron supply to the sea.

Wells, M.L.; Bruland, K.W.

1995-09-08T23:59:59.000Z

84

Lithium Insertion Chemistry of Some Iron Vanadates  

E-Print Network [OSTI]

in A. Nazri, G.Pistoia (Eds. ), Lithium batteries, Science &structure materials in lithium cells, for a lower limitLithium Insertion Chemistry of Some Iron Vanadates Sébastien

Patoux, Sebastien; Richardson, Thomas J.

2008-01-01T23:59:59.000Z

85

Lithium Insertion Chemistry of Some Iron Vanadates  

E-Print Network [OSTI]

G.Pistoia (Eds. ), Lithium batteries, Science & Technology,Keywords: Lithium batteries, iron vanadates, insertionelectrode materials for lithium batteries, (mostly layered

Patoux, Sebastien; Richardson, Thomas J.

2008-01-01T23:59:59.000Z

86

Method for producing iron-based catalysts  

DOE Patents [OSTI]

A method for preparing an acid catalyst having a long shelf-life is provided comprising doping crystalline iron oxides with lattice-compatible metals and heating the now-doped oxide with halogen compounds at elevated temperatures. The invention also provides for a catalyst comprising an iron oxide particle having a predetermined lattice structure, one or more metal dopants for said iron oxide, said dopants having an ionic radius compatible with said lattice structure; and a halogen bound with the iron and the metal dopants on the surface of the particle.

Farcasiu, Malvina (Pittsburgh, PA); Kaufman, Phillip B. (Library, PA); Diehl, J. Rodney (Pittsburgh, PA); Kathrein, Hendrik (McMurray, PA)

1999-01-01T23:59:59.000Z

87

Nanostructure, Chemistry and Crystallography of Iron Nitride...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Nanostructure, Chemistry and Crystallography of Iron Nitride Magnetic Materials by Ultra-High-Resolution Electron Microscopy and Related Methods Nanostructure, Chemistry and...

88

Characterization and Reactivity of Iron Nanoparticles Prepared...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

as solute within the iron core of the HRCO particles. Kinetic batch experiments of carbon tetrachloride (CT) degradation were performed to quantitatively compare the redox...

89

Iron oxyhydroxide mineralization on microbial extracellular polysaccharides  

SciTech Connect (OSTI)

Iron biominerals can form in neutral pH microaerophilic environments where microbes both catalyze iron oxidation and create polymers that localize mineral precipitation. In order to classify the microbial polymers that influence FeOOH mineralogy, we studied the organic and mineral components of biominerals using scanning transmission X-ray microscopy (STXM), micro X-ray fluorescence ({mu}XRF) microscopy, and high-resolution transmission electron microscopy (HRTEM). We focused on iron microbial mat samples from a creek and abandoned mine; these samples are dominated by iron oxyhydroxide-coated structures with sheath, stalk, and filament morphologies. In addition, we characterized the mineralized products of an iron-oxidizing, stalk-forming bacterial culture isolated from the mine. In both natural and cultured samples, microbial polymers were found to be acidic polysaccharides with carboxyl functional groups, strongly spatially correlated with iron oxyhydroxide distribution patterns. Organic fibrils collect FeOOH and control its recrystallization, in some cases resulting in oriented crystals with high aspect ratios. The impact of polymers is particularly pronounced as the materials age. Synthesis experiments designed to mimic the biomineralization processes show that the polysaccharide carboxyl groups bind dissolved iron strongly but release it as mineralization proceeds. Our results suggest that carboxyl groups of acidic polysaccharides are produced by different microorganisms to create a wide range of iron oxyhydroxide biomineral structures. The intimate and potentially long-term association controls the crystal growth, phase, and reactivity of iron oxyhydroxide nanoparticles in natural systems.

Chan, Clara S.; Fakra, Sirine C.; Edwards, David C.; Emerson, David; Banfield, Jillian F.

2010-06-22T23:59:59.000Z

90

Electrodynamics in Iron and Steel  

E-Print Network [OSTI]

In order to calculate the reflected EM fields at low amplitudes in iron and steel, more must be understood about the nature of long wavelength excitations in these metals. A bulk piece of iron is a very complex material with microstructure, a split band structure, magnetic domains and crystallographic textures that affect domain orientation. Probing iron and other bulk ferromagnetic materials with weak reflected and transmitted inductive low frequency fields is an easy operation to perform but the responses are difficult to interpret because of the complexity and variety of the structures affected by the fields. First starting with a simple single coil induction measurement and classical EM calculation to show the error is grossly under estimating the measured response. Extending this experiment to measuring the transmission of the induced fields allows the extraction of three dispersion curves which define these internal fields. One dispersion curve yielded an exceedingly small effective mass of 1.8 10^{-39}kg (1.3 10^{-9} m_e) for those spin waves. There is a second distinct dispersion curve more representative of the density function of a zero momentum bound state rather than a propagating wave. The third dispersion curve describes a magneto-elastic coupling to a very long wave length propagating mode. These experiments taken together display the characteristics of a high temperature Bose-Einstein like condensation that can be initiated by pumping two different states. A weak time dependent field drives the formation of coupled J=0 spin wave pairs with the reduced effective mass reflecting the increased size of the coherent state. These field can dominate induction measurements well past the Curie temperature.

John Paul Wallace

2009-06-03T23:59:59.000Z

91

Microstructure and fracture of alloyed austempered ductile iron  

SciTech Connect (OSTI)

An investigation has been conducted on two austempered ductile irons alloyed with Cu and Cu + Ni, austenitized at 900 deg. C and austempered at 350 deg. C. The microstructure and fracture mode developed through these treatments have been identified by means of light and scanning electron microscopy and X-ray diffraction analysis. Impact energy measurements were performed on un-notched Charpy specimens. The maximum value of retained austenite volume fraction observed in the material alloyed with Cu + Ni was higher than in that alloyed with Cu austenitized and austempered under the same conditions. This led to the material alloyed with Cu + Ni having higher impact energy and substantial plastic deformation.

Eric, Olivera [Institute of Nuclear Sciences 'Vinca', Belgrade (Serbia and Montenegro); Rajnovic, Dragan [University of Novi Sad, Faculty of Technical Sciences, Novi Sad (Serbia and Montenegro); Zec, Slavica [Institute of Nuclear Sciences 'Vinca', Belgrade (Serbia and Montenegro); Sidjanin, Leposava [University of Novi Sad, Faculty of Technical Sciences, Novi Sad (Serbia and Montenegro); Jovanovic, Milan T. [Institute of Nuclear Sciences 'Vinca', Belgrade (Serbia and Montenegro)]. E-mail: tmsj@ptt.yu

2006-12-15T23:59:59.000Z

92

Oceanographic and ecological consequences of iron localization in phytoplankton photosystems  

E-Print Network [OSTI]

Y. Zhang, and K.W. Bruland. 1998. An iron limitation mosaicRue, J. Conn, and K.W. Bruland. 2002. Phytoplankton ironY. Zhang, and K.W. Bruland. 1998. An iron limitation mosaic

Hopkinson, Brian Matthew

2007-01-01T23:59:59.000Z

93

The production of iron carbide  

SciTech Connect (OSTI)

From start-up in 1994 to present, Nucor`s Iron Carbide plant has overcome many obstacles in achieving design production. Many of these impediments were due to flaws in equipment design. With the integration existing within the plant, limitations in any one system reduced the operating capacity of others. For this reason, as modifications were made and system capacities were increased, the need for additional modifications became apparent. Subsequently, operating practices, maintenance scheduling, employee incentives, and production objectives were continually adapted. This paper discusses equipment and design corrections and the quality issues that contributed to achieving the plant`s production capacity.

Anderson, K.M.; Scheel, J. [Nucor Iron Carbide, Inc., Point Lisas (Trinidad and Tobago)

1997-12-31T23:59:59.000Z

94

Electrochemical Studies of Packed Iron Powder Electrodes: Effects...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Packed Iron Powder Electrodes: Effects of Common Constituents of Natural Waters on Corrosion Electrochemical Studies of Packed Iron Powder Electrodes: Effects of Common...

95

Preparations of rare earth-iron alloys by thermite reduction  

DOE Patents [OSTI]

An improved method for the preparation of high-purity rare earth-iron alloys by the aluminothermic reduction of a mixture of rare earth and iron fluorides.

Schmidt, Frederick A. (Ames, IA); Peterson, David T. (Ames, IA); Wheelock, John T. (Nevada, IA)

1986-09-16T23:59:59.000Z

96

Watermelon-like iron nanoparticles: Cr doping effect on magnetism...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Watermelon-like iron nanoparticles: Cr doping effect on magnetism and magnetization interaction reversal. Watermelon-like iron nanoparticles: Cr doping effect on magnetism and...

97

Influence of Iron Redox Transformations on Plutonium Sorption...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

state of iron in the system. Experiments were conducted to examine the effect of sediment iron mineral composition and oxidation state on plutonium sorption and oxidation...

98

Atomistic Simulations of Uranium Incorporation into Iron (Hydr...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Uranium Incorporation into Iron (Hydr)Oxides. Atomistic Simulations of Uranium Incorporation into Iron (Hydr)Oxides. Abstract: Atomistic simulations were carried out to...

99

Microbial Reduction of Uranium under Iron- and Sulfate-reducing...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Uranium under Iron- and Sulfate-reducing Conditions: Effect of Amended Goethite on Microbial Community Microbial Reduction of Uranium under Iron- and Sulfate-reducing Conditions:...

100

Formation of iron complexs from trifluoroacetic acid based liquid...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of iron complexs from trifluoroacetic acid based liquid chromatography mobile phases as interference ions in liquid Formation of iron complexs from trifluoroacetic acid based...

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Bioreduction of hematite nanoparticles by the dissimilatory iron...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

nanoparticles by the dissimilatory iron reducing bacterium Shewanella oneidensis MR-1. Bioreduction of hematite nanoparticles by the dissimilatory iron reducing bacterium...

102

Manufacturing Energy and Carbon Footprint - Sector: Iron and...  

Broader source: Energy.gov (indexed) [DOE]

Iron and Steel (NAICS 3311, 3312), October 2012 (MECS 2006) Manufacturing Energy and Carbon Footprint - Sector: Iron and Steel (NAICS 3311, 3312), October 2012 (MECS 2006)...

103

Morphology and Oxide Shell Structure of Iron Nanoparticles Grown...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Oxide Shell Structure of Iron Nanoparticles Grown by Sputter-Gas-Aggregation. Morphology and Oxide Shell Structure of Iron Nanoparticles Grown by Sputter-Gas-Aggregation. Abstract:...

104

Dechlorination of TCE with palladized iron  

DOE Patents [OSTI]

The present invention relates to various methods, such as an above-ground method and an in-ground method, of using a palladized iron bimetallic system for the dechlorination of chlorinated organic compounds from various effluents or contaminated soil containing the same. The use of palladized iron bimetallic system results in the dechlorination of the chlorinated organic compound into environmentally safe reaction products.

Fernando, Quintus (Tucson, AZ); Muftikian, Rosy (Tucson, AZ); Korte, Nic (Grand Junction, CO)

1997-01-01T23:59:59.000Z

105

Production of iron from metallurgical waste  

DOE Patents [OSTI]

A method of recovering metallic iron from iron-bearing metallurgical waste in steelmaking comprising steps of providing an iron-bearing metallurgical waste containing more than 55% by weight FeO and FeO equivalent and a particle size of at least 80% less than 10 mesh, mixing the iron-bearing metallurgical waste with a carbonaceous material to form a reducible mixture where the carbonaceous material is between 80 and 110% of the stoichiometric amount needed to reduce the iron-bearing waste to metallic iron, and as needed additions to provide a silica content between 0.8 and 8% by weight and a ratio of CaO/SiO.sub.2 between 1.4 and 1.8, forming agglomerates of the reducible mixture over a hearth material layer to protect the hearth, heating the agglomerates to a higher temperature above the melting point of iron to form nodules of metallic iron and slag material from the agglomerates by melting.

Hendrickson, David W; Iwasaki, Iwao

2013-09-17T23:59:59.000Z

106

Introduction Southern Ocean natural iron fertilization  

E-Print Network [OSTI]

led to immediate localized phytoplankton blooms. They also have stimulated con- siderable speculation processes motivated three field programs in 2004­ 2006. The United Kingdom led the "CROZet natural iron into surface waters, recycling of nutrients, reactivity of iron, and phytoplankton physiology. This special

107

2iron-based superconductors  

SciTech Connect (OSTI)

We measured the static uniform spin susceptibility of Ba(Fe1?xRhx)2As2 iron-based superconductors, over a broad range of doping (0.041x0.094) and magnetic fields. At small fields (H1kOe) we observed, above the transition temperature Tc, the occurrence of precursor diamagnetism, which is not ascribable to the Ginzburg–Landau theory. On the contrary, our data agree with a phase fluctuation model, which has been used to interpret a similar phenomenology occurring in the high- Tc cuprate superconductors. Additionally, in the presence of strong fields, the unconventional fluctuating diamagnetism is suppressed, whereas Ginzburg–Landau fluctuations are found, in agreement with literature.

Bossoni, L [University of Pavia-CNISM; Romano, L [University of Parma, Parco Area dell Scienze; Canfield, Paul C [Ames Laboratory; Lascialfari, A [Universita degli Studi di Milano

2014-10-08T23:59:59.000Z

108

Electrochemical impedance spectroscopy study of nickel-iron deposition. 2: Theoretical interpretation  

SciTech Connect (OSTI)

A mathematical model of the anomalous deposition of nickel-iron alloys is compared to steady state as well as electrochemical-impedance spectroscopy data taken on a rotating disk electrode. A key aspect of the model is the treatment of adsorption phenomena of the nickel and iron species. A modification of a previously proposed rate law for the adsorption of iron is shown to predict correctly the changes in alloy composition with the ferrous-ion concentration in the electrolyte. The model is also successful at predicting qualitatively the dependence of impedance data on bath concentration, degree of agitation, and current density. Discrepancies between theory and experiment are most significant at low current densities and high ferrous-ion concentrations.

Baker, B.C.; West, A.C. [Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering, Materials Science, and Mining Engineering

1997-01-01T23:59:59.000Z

109

Iron-air battery development program  

SciTech Connect (OSTI)

The progress and status of the research and development program on the iron-air advanced technology battery system at the Westinghouse Electric Corporation during the period June 1978-December 1979 are described. This advanced battery system is being developed for electric vehicle propulsion applications. Testing and evaluation of 100 cm/sup 2/ size cells was undertaken while individual iron and air electrode programs continued. Progress is reported in a number of these study areas. Results of the improvements made in the utilization of the iron electrode active material coupled with manufacturing and processing studies related to improved air electrodes continue to indicate that a fully developed iron-air battery system will be capable of fulfilling the performance requirements for commuter electric vehicles.

Buzzelli, E.S.; Liu, C.T.; Bryant, W.A.

1980-05-01T23:59:59.000Z

110

System and method for producing metallic iron  

DOE Patents [OSTI]

A method of production of metallic iron nodules comprises assembling a hearth furnace having a moveable hearth comprising refractory material and having a conversion zone and a fusion zone, providing a hearth material layer comprising carbonaceous material on the refractory material, providing a layer of reducible material comprising and iron bearing material arranged in discrete portions over at least a portion of the hearth material layer, delivering oxygen gas into the hearth furnace to a ratio of at least 0.8:1 ponds of oxygen to pounds of iron in the reducible material to heat the conversion zone to a temperature sufficient to at least partially reduce the reducible material and to heat the fusion zone to a temperature sufficient to at least partially reduce the reducible material, and heating the reducible material to form one or more metallic iron nodules and slag.

Englund, David J.; Schlichting, Mark; Meehan, John; Crouch, Jeremiah; Wilson, Logan

2014-07-29T23:59:59.000Z

111

Thermal transport properties of grey cast irons  

SciTech Connect (OSTI)

Thermal diffusivity and thermal conductivity of grey cast iron have been measured as a function of graphite flake morphology, chemical composition, and position in a finished brake rotor. Cast iron samples used for this investigation were cut from ``step block`` castings designed to produce iron with different graphite flake morphologies resulting from different cooling rates. Samples were also machined from prototype alloys and from production brake rotors representing a variation in foundry practice. Thermal diffusivity was measured at room and elevated temperatures via the flash technique. Heat capacity of selected samples was measured with differential scanning calorimetry, and these results were used to calculate the thermal conductivity. Microstructure of the various cast iron samples was quantified by standard metallography and image analysis, and the chemical compositions were determined by optical emission spectroscopy.

Hecht, R.L. [Ford Motor Co., Dearborn, MI (United States). Ford Research Lab.; Dinwiddie, R.B.; Porter, W.D.; Wang, Hsin [Oak Ridge National Lab., TN (United States)

1996-10-01T23:59:59.000Z

112

Iron and the ecology of marine microbes  

E-Print Network [OSTI]

Iron is a cofactor of a number biochemical reactions that are essential for life. In the marine environment, this micronutrient is a scarce resource that limits processes of global importance such as photosynthesis and ...

Ventouras, Laure-Anne

2013-01-01T23:59:59.000Z

113

Dechlorination of TCE with palladized iron  

DOE Patents [OSTI]

The present invention relates to various methods, such as an above-ground method and an in-ground method, of using a palladized iron bimetallic system for the dechlorination of chlorinated organic compounds from various effluents or contaminated soil containing the same. The use of palladized iron bimetallic system results in the dechlorination of the chlorinated organic compound into environmentally safe reaction products. 10 figs.

Fernando, Q.; Muftikian, R.; Korte, N.

1997-04-01T23:59:59.000Z

114

Elastic moduli of nickel and iron aluminides  

E-Print Network [OSTI]

ELASTIC MODULI OF NICKEL AND IRON ALUMINIDES A Thesis by SREEDHAR MAN JIGANI Submitted to the Oifice of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1993... Major Subject: Mechanical Engineering ELASTIC MODULI OF NICKEL AND IRON ALUMINIDES A Thesis by SREEDHAR MAN JIGANI Submitted to Texas AkM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved...

Manjigani, Sreedhar

2012-06-07T23:59:59.000Z

115

A Comparison of Iron and Steel Production Energy Intensity in China and the U.S  

E-Print Network [OSTI]

of Iron and Steel Production Energy Use and Energy Intensityof Iron and Steel Production Energy Intensity in China andof Iron and Steel Production Energy Intensity in China and

Price, Lynn

2014-01-01T23:59:59.000Z

116

E-Print Network 3.0 - assembly cellular iron Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: , iron storage function and cellular regulation. Biochim. Biophys. Acta Bioenerg. 1275: 161-203. HOFMANN... Availability of iron from iron-storage proteins to marine...

117

Effect of different intravenous iron preparations on lymphocyte intracellular reactive oxygen species generation and subpopulation survival.  

E-Print Network [OSTI]

IV iron compounds induced greater intracellular ROS generation,IV iron preparations on intracellular reactive oxygen species generationIV iron preparations on intracellular immune cell ROS generation

Gupta, Ajay; Zhuo, Jiaying; Zha, Junli; Reddy, Srinivasa; Olp, Jonathan; Pai, Amy

2010-01-01T23:59:59.000Z

118

Iron speciation in urban dust  

SciTech Connect (OSTI)

An improved understanding of anthropogenic impacts on ocean fertility requires knowledge of anthropogenic dust mineralogy and associated Fe speciation as a critical step toward developing Fe solubility models constrained by mineralogical composition. This study explored the utility of micro-focused X-ray absorption spectroscopy ({mu}-XAS) in characterizing the speciation of Fe in urban dust samples. A micro-focused beam of 10 x 7 {mu}m made possible the measurement of the Fe K edge XAS spectra of individual dust particles in the PM5.6 size fraction collected in Newark, New Jersey, USA. Spectral analysis indicated the presence of mixtures of Fe-containing minerals within individual dust particles; we observed significant magnetite content along with other Fe(III)-(hydr)oxide minerals which could not be conclusively identified. Our data indicate that detailed quantitative determination of Fe speciation requires extended energy scans to constrain the types and relative abundance of Fe species present. We observe heterogeneity in Fe speciation at the dust particle level, which underscores the importance of analyzing a statistically adequate number of particles within each dust sample. Where possible, {mu}-XAS measurements should be complemented with additional characterization techniques such as {mu}-XRD and bulk XAS to obtain a comprehensive picture of the Fe speciation in dust materials. X-ray microprobes should be used to complement bulk methods used to determine particle composition, methods that fail to record particle heterogeneity. Keywords - Urban dust; Iron; Speciation; Micro-focused X-ray absorption spectroscopy.

Elzinga, E.J.; Fitts, J.; Gao, Y.; Tappero, R.

2011-08-01T23:59:59.000Z

119

Catalytic iron oxide for lime regeneration in carbonaceous fuel combustion  

SciTech Connect (OSTI)

Lime utilization for sulfurous oxides absorption in fluidized combustion of carbonaceous fuels is improved by impregnation of porous lime particulates with iron oxide. The impregnation is achieved by spraying an aqueous solution of mixed iron sulfate and sulfite on the limestone before transfer to the fluidized bed combustor, whereby the iron compounds react with the limestone substrate to form iron oxide at the limestone surface. It is found that iron oxide present in the spent limestone acts as a catalyst to regenerate the spent limestone in a reducing environment. With only small quantities of iron oxide the calcium can be recycled at a significantly increased rate.

Shen, M.; Yang, R.T.

1980-09-30T23:59:59.000Z

120

Iron-based soft magnetic composites with MnZn ferrite nanoparticles coating obtained by solgel method  

E-Print Network [OSTI]

­gel method Shen Wu a , Aizhi Sun a,n , Wenhuan Xu a , Qian Zhang a , Fuqiang Zhai a , Philip Logan b , Alex A-ray spectroscopy and distribution maps show that the iron particle surface is covered with a thin layer of Mn compared with the epoxy resin coated samples at 10 kHz. The effects of heat treatment temperature

Volinsky, Alex A.

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Iron-based alloys with corrosion resistance to oxygen-sulfur mixed gases  

DOE Patents [OSTI]

An iron-based alloy with improved performance with exposure to oxygen-sulfur mixed gases with the alloy containing about 9--30 wt. % Cr and a small amount of Nb and/or Zr implanted on the surface of the alloy to diffuse a depth into the surface portion, with the alloy exhibiting corrosion resistance to the corrosive gases without bulk addition of Nb and/or Zr and without heat treatment at temperatures of 1000--1100 C. 7 figs.

Natesan, K.

1992-11-17T23:59:59.000Z

122

Iron-based alloys with corrosion resistance to oxygen-sulfur mixed gases  

DOE Patents [OSTI]

An iron-based alloy with improved performance with exposure to oxygen-sulfur mixed gases with the alloy containing about 9-30 wt. % Cr and a small amount of Nb and/or Zr implanted on the surface of the alloy to diffuse a depth into the surface portion, with the alloy exhibiting corrosion resistance to the corrosive gases without bulk addition of Nb and/or Zr and without heat treatment at temperatures of 1000.degree.-1100.degree. C.

Natesan, Krishnamurti (Naperville, IL)

1992-01-01T23:59:59.000Z

123

Iron-based Superconductor Simulations Spin Out New Possibilities...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in 15 iron-based materials, including iron compounds that are high-temperature superconductors (images d-h). The x axis shows the momentum of the spin excitation in selected...

124

Candidate anode materials for iron production by molten oxide electrolysis  

E-Print Network [OSTI]

Molten oxide electrolysis (MOE) has been identified by the American Iron and Steel Institute (AISI) as one of four possible breakthrough technologies to alleviate the environmental impact of iron and steel production. This ...

Paramore, James D

2010-01-01T23:59:59.000Z

125

Iron oxide nanoparticles as a contrast agent for thermoacoustic tomography  

E-Print Network [OSTI]

radiation. The addition of an exogenous contrast agent improves image quality by more effectively converting microwave energy to heat. The use of iron oxide nanoparticles in MRI applications has been explored but super paramagnetic iron oxide nanoparticles...

Keho, Aaron Lopez

2009-06-02T23:59:59.000Z

126

Preparations of rare earth-iron alloys by thermite reduction  

DOE Patents [OSTI]

Disclosed is an improved method for the preparation of high-purity rare earth-iron alloys by the aluminothermic reduction of a mixture of rare earth and iron fluorides.

Schmidt, F.A.; Peterson, D.T.; Wheelock, J.T.

1985-10-28T23:59:59.000Z

127

The marine biogeochemistry of dissolved and colloidal iron  

E-Print Network [OSTI]

Iron is a redox active trace metal micronutrient essential for primary production and nitrogen acquisition in the open ocean. Dissolved iron (dFe) has extremely low concentrations in marine waters that can drive phytoplankton ...

Fitzsimmons, Jessica Nicole

2013-01-01T23:59:59.000Z

128

arabian iron age: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

iron deficiency should be the goal of nutritional intervention programs. In the United States, approximately 5 % of children from 1-5 years of age suffer from iron deficiency...

129

Iron and Manganese in Potable Water  

E-Print Network [OSTI]

none 22. Hays 469.0 1.0 none 23. Hays .55 24. Peabody 830.0 .5 trace 25. Caldwell 458.0 2.0 trace 26. Lyons 456.0 .1 trace 27. Osborne 377.0 .3 none 28. Herington 608,0 .1 trace 29. Sterling - - _ .1 .036 30. Waverly 546,0 .2 none 31. Clifton 350.... The occurence of a black peaty layer overlying white sand containing iron, the white sand in turn overlying red sand containing 10. oxidize^ iron, is a familiar sight to all engineers who have made excavations. Here the carbon dioxide produced...

Young, Clifford Caudy

1911-06-01T23:59:59.000Z

130

Steam reforming utilizing iron oxide catalyst  

SciTech Connect (OSTI)

High activity steam reforming iron oxide catalysts are described. Such catalysts can be unsupported utilizing at least 90% by weight iron oxide and various modifiers (Ai/sub 2/O/sub 3/, K/sub 2/O, CaO, SiO/sub 2/) or unmodified and supported on such things as alumina, CaO impregnated alumina, and lanthanum stabilized alumina. When used in steam reformers such as autothermal and tubular steam reformers, these catalysts demonstrate much improved resistance to carbon plugging.

Setzer, H. T.; Bett, J. A. S.

1985-06-11T23:59:59.000Z

131

Iron Availability in the Southern Ocean  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for andFuel-Efficient Engines | ornl.govIronIron

132

Iron Availability in the Southern Ocean  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctober 5,Octoberdeep |IronIron

133

Iron Availability in the Southern Ocean  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctober 5,OctoberdeepIronIron

134

Minnesota Jobs to Come with Efficient Iron Plant  

Broader source: Energy.gov [DOE]

New energy-efficient iron plant offers a ray of hope for workers after local mining company shuts down.

135

Apparatus and process for water treatment  

DOE Patents [OSTI]

An apparatus is disclosed utilizing permeable treatment media for treatment of contaminated water, along with a method for enhanced passive flow of contaminated water through the treatment media. The apparatus includes a treatment cell including a permeable structure that encloses the treatment media, the treatment cell may be located inside a water collection well, exterior to a water collection well, or placed in situ within the pathway of contaminated groundwater. The passive flow of contaminated water through the treatment media is maintained by a hydraulic connection between a collecting point of greater water pressure head, and a discharge point of lower water pressure head. The apparatus and process for passive flow and groundwater treatment utilizes a permeable treatment media made up of granular metal, bimetallics, granular cast iron, activated carbon, cation exchange resins, and/or additional treatment materials. An enclosing container may have an outer permeable wall for passive flow of water into the container and through the enclosed treatment media to an effluent point. Flow of contaminated water is attained without active pumping of water through the treatment media. Remediation of chlorinated hydrocarbons and other water contaminants to acceptable regulatory concentration levels is accomplished without the costs of pumping, pump maintenance, and constant oversight by personnel.

Phifer, Mark A. (North Augusta, SC); Nichols, Ralph L. (North Augusta, SC)

2001-01-01T23:59:59.000Z

136

A Review of Iron Phosphate Glasses and Recommendations for Vitrifying Hanford Waste  

SciTech Connect (OSTI)

This report contains a comprehensive review of the research conducted, world-wide, on iron phosphate glass over the past ~30 years. Special attention is devoted to those iron phosphate glass compositions which have been formulated for the purpose of vitrifying numerous types of nuclear waste, with special emphasis on the wastes stored in the underground tanks at Hanford WA. Data for the structural, chemical, and physical properties of iron phosphate waste forms are reviewed for the purpose of understanding their (a) outstanding chemical durability which meets all current DOE requirements, (b) high waste loadings which can exceed 40 wt% (up to 75 wt%) for several Hanford wastes, (c) low melting temperatures, can be as low as 900°C for certain wastes, and (d) high tolerance for “problem” waste components such as sulfates, halides, and heavy metals (chromium, actinides, noble metals, etc.). Several recommendations are given for actions that are necessary to smoothly integrate iron phosphate glass technology into the present waste treatment plans and vitrification facilities at Hanford.

Delbert E. Ray; Chandra S. Ray

2013-11-01T23:59:59.000Z

137

Iron distribution and phytoplankton iron limitation in the southern California Current System  

E-Print Network [OSTI]

layer density (sigma-theta) are shown for six CalCOFI surveysolution (Sigma-Aldrich) in 0.016 M ultrapure HCl every sixsigma-theta. Macronutrients, dissolved iron, and chl were elevated during all six

King, Andrew Luke

2008-01-01T23:59:59.000Z

138

Iron Air collision with high density QCD  

E-Print Network [OSTI]

The color glass condensate approach describes successfully heavy ion collisions at RHIC. We investigate Iron-air collisions within this approach and compare results to event generators commonly used in air shower simulations. We estimate uncertainties in the extrapolation to GZK energies and discuss implications for air shower simulations.

Hans-Joachim Drescher

2006-12-08T23:59:59.000Z

139

Drinking Water Problems: Iron and Manganese  

E-Print Network [OSTI]

. The chemical must be in the water for at least 20 minutes for oxi- dation to take place, longer if the water contains colloidal iron/manganese. After solid particles have formed they are filtered, often with a sand filter. Adding aluminum sulfate (alum...

Dozier, Monty; McFarland, Mark L.

2004-02-20T23:59:59.000Z

140

Superconductivity in iron compounds G. R. Stewart  

E-Print Network [OSTI]

of the superconductivity in this new class of compounds. These iron pnictide and chalcogenide (FePn/Ch) superconductors-phonon coupled ``conventional'' superconductors. Clearly, superconductivity and magnetism or magnetic of magnetism and superconductivity in FePn/Ch superconductors 1606 D. Tc and TS=TSDW versus pressure 1607 1

Wu, Zhigang

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Ligand effects on bioinspired iron complexes  

E-Print Network [OSTI]

- phosphaadamantane, PTA, coordinates to the Fe centers forming the disubstituted complex (m-pdt)[Fe(CO)2PTA]2, which presents one PTA in each iron in a transoid arrangement. Substitution of one CO ligand in the (m-pdt)[Fe(CO)3]2 parent complex forms the asymmetric (m-pdt)[Fe...

Mejia Rodriguez, Ma. del Rosario

2005-11-01T23:59:59.000Z

142

Visualizing Iron Deposition in Multiple Sclerosis Cadaver Brains  

SciTech Connect (OSTI)

Aim: To visualize and validate iron deposition in two cases of multiple sclerosis using rapid scanning X-Ray Fluorescence (RS-XRF) and Susceptibility Weighted Imaging (SWI). Material and Methods: Two (2) coronal cadaver brain slices from patients clinically diagnosed with multiple sclerosis underwent magnetic resonance imaging (MRI), specifically SWI to image iron content. To confirm the presence of iron deposits and the absence of zinc-rich myelin in lesions, iron and zinc were mapped using RS-XRF. Results: MS lesions were visualized using FLAIR and correlated with the absence of zinc by XRF. XRF and SWI showed that in the first MS case, there were large iron deposits proximal to the draining vein of the caudate nucleus as well as iron deposits associated with blood vessels throughout the globus pallidus. Less iron was seen in association with lesions than in the basal ganglia. The presence of larger amounts of iron correlated reasonably well between RS-XRF and SWI. In the second case, the basal ganglia appeared normal and acute perivascular iron deposition was absent. Conclusion: Perivascular iron deposition is seen in some but not all MS cases, giving credence to the use of SWI to assess iron involvement in MS pathology in vivo.

Habib, Charbel A.; Zheng Weili; Mark Haacke, E. [Department Of Biomedical Engineering, Wayne State University, Detroit, MI 48202 (United States); Webb, Sam [Stanford Synchrotron Radiation Lightsource, Stanford Linear Accelerator Complex National Accelerator Laboratory, Menlo Park, California (United States); Nichol, Helen [Department of Anatomy and Cell Biology, University of Saskatchewan, 107 Wiggins Rd. Rm A302, Saskatoon, SK S7N5E5 (Canada)

2010-07-23T23:59:59.000Z

143

Method for preparing hydrous iron oxide gels and spherules  

DOE Patents [OSTI]

The present invention is directed to methods for preparing hydrous iron oxide spherules, hydrous iron oxide gels such as gel slabs, films, capillary and electrophoresis gels, iron monohydrogen phosphate spherules, hydrous iron oxide spherules having suspendable particles homogeneously embedded within to form composite sorbents and catalysts, iron monohydrogen phosphate spherules having suspendable particles of at least one different sorbent homogeneously embedded within to form a composite sorbent, iron oxide spherules having suspendable particles homogeneously embedded within to form a composite of hydrous iron oxide fiber materials, iron oxide fiber materials, hydrous iron oxide fiber materials having suspendable particles homogeneously embedded within to form a composite, iron oxide fiber materials having suspendable particles homogeneously embedded within to form a composite, dielectric spherules of barium, strontium, and lead ferrites and mixtures thereof, and composite catalytic spherules of barium or strontium ferrite embedded with oxides of Mg, Zn, Pb, Ce and mixtures thereof. These variations of hydrous iron oxide spherules and gel forms prepared by the gel-sphere, internal gelation process offer more useful forms of inorganic ion exchangers, catalysts, getters, dielectrics, and ceramics.

Collins, Jack L.; Lauf, Robert J.; Anderson, Kimberly K.

2003-07-29T23:59:59.000Z

144

Developer Installed Treatment Plants  

E-Print Network [OSTI]

-installed treatment plants. These treatment plants are more commonly known as package wastewater treatment plants. 1

unknown authors

2008-01-01T23:59:59.000Z

145

A study on the oxidation characteristics of cast irons containing aluminum  

SciTech Connect (OSTI)

Isothermal-oxidation characteristics of cast irons containing aluminum (5-15% Al) from 700 to 1000{degrees}C in air have been studied. In addition to mass-gain measurements, the morphology and composition of the oxide scales have been examined by SEM-EDX system and XRD analysis. A normal Fe-5Al-C alloy does not develop protective, adherent scales. Even the addition of misch metal and calcium silicide to such an alloy does not improve its oxidation resistance. But aluminum cast iron develops considerable oxidation resistance only when a sufficient quantity of silicon is also present in the alloy. Treatment of the alloy with misch metal and calcium silicide together assists in protective scale formation. Among the alloys investigated Fe-15Al-Si-C treated with misch metal and calcium silicide shows minimum oxidation at 1000{degrees}C.

Ghosh, S.; Prodhan, A. [National Metallurigical Laboratory, Jamshedpur (India); Mohanty, O.N. [Tata Steel, Jamshedpur (India)] [and others

1996-02-01T23:59:59.000Z

146

Iron-sulfide redox flow batteries  

DOE Patents [OSTI]

Iron-sulfide redox flow battery (RFB) systems can be advantageous for energy storage, particularly when the electrolytes have pH values greater than 6. Such systems can exhibit excellent energy conversion efficiency and stability and can utilize low-cost materials that are relatively safer and more environmentally friendly. One example of an iron-sulfide RFB is characterized by a positive electrolyte that comprises Fe(III) and/or Fe(II) in a positive electrolyte supporting solution, a negative electrolyte that comprises S.sup.2- and/or S in a negative electrolyte supporting solution, and a membrane, or a separator, that separates the positive electrolyte and electrode from the negative electrolyte and electrode.

Xia, Guan-Guang; Yang, Zhenguo; Li, Liyu; Kim, Soowhan; Liu, Jun; Graff, Gordon L

2013-12-17T23:59:59.000Z

147

Role of microbial iron reduction in the dissolution of iron hydroxysulfate minerals - article no. G01012  

SciTech Connect (OSTI)

Reduction of structural sulfate in the iron-hydroxysulfate mineral jarosite by sulfate-reducing bacteria has previously been demonstrated. The primary objective of this work was to evaluate the potential for anaerobic dissolution of the iron-hydroxysulfate minerals jarosite and schwertmannite at neutral pH by iron-reducing bacteria. Mineral dissolution was tested using a long-term cultivar, Geobacter metallireducens strain GS-15, and a fresh isolate Geobacter sp. strain ENN1, previously undescribed. ENN1 was isolated from the discharge site of Shadle Mine, in the southern anthracite coalfield of Pennsylvania, where schwertmannite was the predominant iron-hydroxysulfate mineral. When jarosite from Elizabeth Mine (Vermont) was provided as the sole terminal electron acceptor, resting cells of both G. metallireducens and ENN1 were able to reduce structural Fe(III), releasing Fe{sup +2}, SO{sub 4}{sup -2}, and K{sup +} ions. A lithified jarosite sample from Utah was more resistant to microbial attack, but slow release of Fe{sup +2} was observed. Neither bacterium released Fe{sup +2} from poorly crystalline synthetic schwertmannite. Our results indicate that exposure of jarosite to iron-reducing conditions at neutral pH is likely to promote the mobility of hazardous constituents and should therefore be considered in evaluating waste disposal and/or reclamation options involving jarosite-bearing materials.

Jones, E.J.P.; Nadeau, T.L.; Voytek, M.A.; Landa, E.R. [US Geological Survey, Reston, VA (United States)

2006-03-28T23:59:59.000Z

148

Thin Wall Cast Iron: Phase II  

SciTech Connect (OSTI)

The development of thin-wall technology allows the designers of energy consuming equipment to select the most appropriate material based on cost/material properties considerations, and not solely on density. The technology developed in this research project will permit the designers working for the automotive industry to make a better informed choice between competing materials and thin wall cast iron, thus decreasing the overall cost of the automobile.

Doru M. Stefanescu

2005-07-21T23:59:59.000Z

149

Correlation effects in the iron pnictides  

SciTech Connect (OSTI)

One of the central questions about the iron pnictides concerns the extent to which their electrons are strongly correlated. Here we address this issue through the phenomenology of the charge transport and dynamics, single-electron excitation spectrum, and magnetic ordering and dynamics. We outline the evidence that the parent compounds, while metallic, have electron interactions that are sufficiently strong to produce incipient Mott physics. In other words, in terms of the strength of electron correlations compared to the kinetic energy, the iron pnictides are closer to intermediately-coupled systems lying at the boundary between itinerancy and localization, such as V{sub 2}O{sub 3} a or Se-doped NiS{sub 2} , rather than to simple antiferromagnetic metals like Cr. This level of electronic correlations produces a new small parameter for controlled theoretical analyses, namely the fraction of the single-electron spectral weight that lies in the coherent part. Using this expansion parameter, we construct the effective low-energy Hamiltonian and discuss its implications for the magnetic order and magnetic quantum criticality. Finally, this approach sharpens the notion of magnetic frustration for such a metallic system, and brings about a multi band matrix t-J{sub 1}-J{sub 2} model for the carrier-doped iron pnictides.

Zhu, Jian-xin [Los Alamos National Laboratory; Si, Qimiao [RICE UNIV; Abrahams, Elihu [RUTGERS UNIV; Dai, Jianhui [ZHEJIANG UNIV

2009-01-01T23:59:59.000Z

150

Optimization of low-cost phosphorus removal from wastewater using co-treatments with constructed  

E-Print Network [OSTI]

treatment residual; iron; lime sludge; municipal wastewater Introduction The US-EPA has identified for removing P from wastewater (US-EPA, 1993). However, questions of mechanisms, predictabilityOptimization of low-cost phosphorus removal from wastewater using co-treatments with constructed

Florida, University of

151

Magnetic phase composition of strontium titanate implanted with iron ions  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer The origin of RT-ferromagnetism in iron implanted strontium titanate. Black-Right-Pointing-Pointer Metallic iron nanoclusters form during implantation and define magnetic behaviour. Black-Right-Pointing-Pointer Paramagnetic at room temperature iron-substituted strontium titanate identified. -- Abstract: Thin magnetic films were synthesized by means of implantation of iron ions into single-crystalline (1 0 0) substrates of strontium titanate. Depth-selective conversion electron Moessbauer spectroscopy (DCEMS) indicates that origin of the samples magnetism is {alpha}-Fe nanoparticles. Iron-substituted strontium titanate was also identified but with paramagnetic behaviour at room temperature. Surface magneto-optical Kerr effect (SMOKE) confirms that the films reveal superparamagnetism (the low-fluence sample) or ferromagnetism (the high-fluence sample), and demonstrate absence of magnetic in-plane anisotropy. These findings highlight iron implanted strontium titanate as a promising candidate for composite multiferroic material and also for gas sensing applications.

Dulov, E.N., E-mail: evgeny.dulov@ksu.ru [Kazan Federal University, 420008 Kazan (Russian Federation); Ivoilov, N.G.; Strebkov, O.A. [Kazan Federal University, 420008 Kazan (Russian Federation)] [Kazan Federal University, 420008 Kazan (Russian Federation); Tagirov, L.R. [Kazan Federal University, 420008 Kazan (Russian Federation) [Kazan Federal University, 420008 Kazan (Russian Federation); Zavoisky Physico-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences, 420029 Kazan (Russian Federation); Nuzhdin, V.I. [Zavoisky Physico-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences, 420029 Kazan (Russian Federation)] [Zavoisky Physico-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences, 420029 Kazan (Russian Federation); Khaibullin, R.I. [Kazan Federal University, 420008 Kazan (Russian Federation) [Kazan Federal University, 420008 Kazan (Russian Federation); Zavoisky Physico-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences, 420029 Kazan (Russian Federation); Kazan, S. [Department of Physics, Gebze Institute of Technology, Gebze, 41400 Kocaeli (Turkey)] [Department of Physics, Gebze Institute of Technology, Gebze, 41400 Kocaeli (Turkey); Mikailzade, F.A. [Department of Physics, Gebze Institute of Technology, Gebze, 41400 Kocaeli (Turkey) [Department of Physics, Gebze Institute of Technology, Gebze, 41400 Kocaeli (Turkey); Institute of Physics, Azerbaijan National Academy of Sciences, H. Javid Av. 33, AZ 1143, Baku (Azerbaijan)

2011-12-15T23:59:59.000Z

152

Iron phosphate compositions for containment of hazardous metal waste  

DOE Patents [OSTI]

An improved iron phosphate waste form for the vitrification, containment and long-term disposition of hazardous metal waste such as radioactive nuclear waste is provided. The waste form comprises a rigid iron phosphate matrix resulting from the cooling of a melt formed by heating a batch mixture comprising the metal waste and a matrix-forming component. The waste form comprises from about 30 to about 70 weight percent P{sub 2}O{sub 5} and from about 25 to about 50 weight percent iron oxide and has metals present in the metal waste chemically dissolved therein. The concentration of iron oxide in the waste form along with a high proportion of the iron in the waste form being present as Fe{sup 3+} provide a waste form exhibiting improved chemical resistance to corrosive attack. A method for preparing the improved iron phosphate waste forms is also provided. 21 figs.

Day, D.E.

1998-05-12T23:59:59.000Z

153

Iron phosphate compositions for containment of hazardous metal waste  

DOE Patents [OSTI]

An improved iron phosphate waste form for the vitrification, containment and long-term disposition of hazardous metal waste such as radioactive nuclear waste is provided. The waste form comprises a rigid iron phosphate matrix resulting from the cooling of a melt formed by heating a batch mixture comprising the metal waste and a matrix-forming component. The waste form comprises from about 30 to about 70 weight percent P.sub.2 O.sub.5 and from about 25 to about 50 weight percent iron oxide and has metals present in the metal waste chemically dissolved therein. The concentration of iron oxide in the waste form along with a high proportion of the iron in the waste form being present as Fe.sup.3+ provide a waste form exhibiting improved chemical resistance to corrosive attack. A method for preparing the improved iron phosphate waste forms is also provided.

Day, Delbert E. (Rolla, MO)

1998-01-01T23:59:59.000Z

154

Reduction and carburization reactions in the iron bath smelter  

SciTech Connect (OSTI)

Slag-metal-coal reactions in the iron-bath smelter were analyzed based on a reaction model. It was concluded that the productivity and carbon content of the hot metal produced in a smelter can be controlled by adjusting the slag volume and iron oxide content in slag. Furthermore, iron oxide content is determined by the slag volume and the stirring intensity of the slag.

Uemura, Kenichiro

1993-01-01T23:59:59.000Z

155

approved iron nanoparticles: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

thickness on magnetic interactions in self-assembled single domain iron nanoparticles Materials Science Websites Summary: of Mechanical and Chemical Engineering, North Carolina...

156

Argonne scientists discover new magnetic phase in iron-based...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

neutron diffraction image giving evidence for the new magnetic phase in iron-based superconductors discovered by Argonne scientists. It shows the scattering results from a sample...

157

Metal regeneration of iron chelates in nitric oxide scrubbing  

DOE Patents [OSTI]

The present invention relates to a process of using metal particles to reduce NO to NH.sub.3. More specifically, the invention concerns an improved process to regenerate iron (II) (CHELATE) by reduction of iron (II) (CHELATE) (NO) complex, which process comprises: a) contacting an aqueous solution containing iron (II) (CHELATE) (NO) with metal particles at between about 20.degree. and 90.degree. C. to reduce NO present, produce ammonia or an ammonium ion, and produce free iron (II) (CHELATE) at a pH of between about 3 and 8. The process is useful to remove NO from flue gas and reduce pollution.

Chang, Shih-Ger (El Cerrito, CA); Littlejohn, David (Oakland, CA); Shi, Yao (Berkeley, CA)

1997-08-19T23:59:59.000Z

158

Metal regeneration of iron chelates in nitric oxide scrubbing  

DOE Patents [OSTI]

The present invention relates to a process of using metal particles to reduce NO to NH{sub 3}. More specifically, the invention concerns an improved process to regenerate iron (II) (CHELATE) by reduction of iron (II) (CHELATE) (NO) complex, which process comprises: (a) contacting an aqueous solution containing iron (II) (CHELATE) (NO) with metal particles at between about 20 and 90 C to reduce NO present, produce ammonia or an ammonium ion, and produce free iron (II) (CHELATE) at a pH of between about 3 and 8. The process is useful to remove NO from flue gas and reduce pollution. 34 figs.

Chang, S.G.; Littlejohn, D.; Shi, Y.

1997-08-19T23:59:59.000Z

159

Iron Speciation and Mixing in Single Aerosol Particles from the...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

iron from atmospheric aerosol is an essential nutrient that can control oceanic productivity, thereby impacting the global carbon budget and climate. Particles collected on...

160

Iron Cycling and Redox Evolution in the Precambrian  

E-Print Network [OSTI]

I use compilations of phosphorous and iron data in ironused upwelling dissolved phosphorous and ammonium as well asand adsorption of dissolved phosphorous onto microbial Fe

Planavsky, Noah John

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Iron(III)-doped, silica : biodegradable, self-targeting nanoparticles  

E-Print Network [OSTI]

of calcium and phosphorous, which can be attributed toamount of calcium and phosphorous increase. The iron(III)-composed of calcium and phosphorous were in the recovered

Mitchell, Kristina Kalani Pohaku

2011-01-01T23:59:59.000Z

162

The effects of copper and iron deficiencies in the chick  

E-Print Network [OSTI]

was assimilated by the chick. Cunningham (1931) and Josephs (1932) found that rats fed a milk diet plus iron showed no significant difference from rats fed milk plus sources of copper and iron. Elvehjem and Sherman (1932) reported that when rats de- ficient.../or iron as follows: Group Group Group Group Group Group 1 ? no added copper or iron 2 - cupric sulfate added (5 ppm) 3 - cupric oxide added (5 ppm) 4 ? ferrous sulfate added (40 ppm) 5 - cupric sulfate (5 ppm) plus ferrous sulfate added (40 ppm...

McGhee, Flin Cameron

1964-01-01T23:59:59.000Z

163

Iron acquisition and utilization by Rhodococcus equi: potential virulence factors  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . Growth of R. equi in minimal media (MM) and MM without iron 66 (MM-Fe) . . 67 12 13 Growth of R. equi in 100 ItM DIP + varying iron concentrations. . . . . . . . . 68 Effects of iron source (FeSO& or FeCls) onin vitro growth of R. equi. . . 69.... , virulence factors) against oxidative stress Three types of bacterial SODs have been described: those that contain either iron (Fe SOD), manganese (MnSOD), or copper-zinc (Cu-ZnSOD)(85). If the appropriate minerals are not available for production of SODs...

Carnes, Misty Lee

2002-01-01T23:59:59.000Z

164

Percolation Explains How Earth's Iron Core Formed | Stanford...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

history. Earth's present layered structure with a metallic core and an overlying silicate mantle would have required mechanisms to separate iron alloy from a silicate phase....

165

Oil production enhancement through a standardized brine treatment. Final report  

SciTech Connect (OSTI)

In order to permit the environmentally safe discharge of brines produced from oil wells in Pennsylvania to the surface waters of the Commonwealth and to rapidly brings as many wells as possible into compliance with the law, the Pennsylvania Oil and Gas Association (POGAM) approached the Pennsylvania State University to develop a program designed to demonstrate that a treatment process to meet acceptable discharge conditions and effluent limitations can be standardized for all potential stripper wells brine discharge. After the initial studies, the first phase of this project was initiated. A bench-scale prototype model was developed for conducting experiments in laboratory conditions. The experiments pursued in the laboratory conditions were focused on the removal of ferrous iron from synthetically made brine. Iron was selected as the primary heavy metals for studying the efficiency of the treatment process. The results of a number of experiments in the lab were indicative of the capability of the proposed brine treatment process in the removal of iron. Concurrent with the laboratory experiments, a comprehensive and extensive kinetic study was initiated. This study was necessary to provide the required data base for process modeling. This study included the investigation of the critical pH as well as the rate and order of reactions of the studied elements: aluminum, lead, zinc, and copper. In the second phase of this project, a field-based prototype was developed to evaluate and demonstrate the treatment process effectiveness. These experiments were conducted under various conditions and included the testing on five brines from different locations with various dissolved constituents. The outcome of this research has been a software package, currently based on iron`s reactivity, to be used for design purposes. The developed computer program was refined as far as possible using the results from laboratory and field experiments.

Adewumi, A.; Watson, R.; Tian, S.; Safargar, S.; Heckman, S.; Drielinger, I.

1995-08-01T23:59:59.000Z

166

Manganese Doping of Magnetic Iron Oxide Nanoparticles: Tailoring Surface Reactivity for a Regenerable Heavy Metal Sorbent  

SciTech Connect (OSTI)

A method for tuning the analyte affinity of magnetic, inorganic nanostructured sorbents for heavy metal contaminants is described. The manganese-doped iron oxide nanoparticle sorbents have a remarkably high affinity compared to the precursor material. Sorbent affinity can be tuned toward an analyte of interest simply by adjustment of the dopant quantity. The results show that following the Mn doping process there is a large increase in affinity and capacity for heavy metals (i.e., Co, Ni, Zn, As, Ag, Cd, Hg, and Tl). Capacity measurements were carried out for the removal of cadmium from river water and showed significantly higher loading than the relevant commercial sorbents tested for comparison. The reduction in Cd concentration from 100 ppb spiked river water to 1 ppb (less than the EPA drinking water limit of 5 ppb for Cd) was achieved following treatment with the Mn-doped iron oxide nanoparticles. The Mn-doped iron oxide nanoparticles were able to load 1 ppm of Cd followed by complete stripping and recovery of the Cd with a mild acid wash. The Cd loading and stripping is shown to be consistent through multiple cycles with no loss of sorbent performance.

Warner, Cynthia L.; Chouyyok, Wilaiwan; Mackie, Katherine E.; Neiner, Doinita; Saraf, Laxmikant; Droubay, Timothy C.; Warner, Marvin G.; Addleman, Raymond S.

2012-02-28T23:59:59.000Z

167

EPR and magnetic susceptibility investigation of iron-zinc-phosphate glass ceramics  

SciTech Connect (OSTI)

(Fe{sub 2}O{sub 3}){sub x}?(P{sub 2}O{sub 5}){sub 40}?(ZnO){sub 60?x} glass ceramics containing different concentrations of Fe{sub 2}O{sub 3} ranging from 1 to 20 mol% were obtained by heat treatment of glass samples at 650 °C for 2 h. The structural and magnetic properties of these glass ceramics were investigated by means of electron paramagnetic resonance (EPR) and magnetic susceptibility measurements. The EPR spectra of the studied samples revealed absorptions centered at g ? 2.0 and 4.3. The compositional variations of the intensity and line width of these absorption lines was interpreted in terms of the variation in Fe{sup 3+} and Fe{sup 2+} ions concentration in the glass ceramics as well as the interaction between the iron ions. The magnetic susceptibility data evidenced the presence of both Fe{sup 3+} and Fe{sup 2+} ions, with their relative content depending on the Fe{sub 2}O{sub 3} concentration. Dipolar and superexchange interactions involving iron ions were revealed depending on the iron content of the sample.

Popa, A. [National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath, 400293 Cluj-Napoca (Romania)] [National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath, 400293 Cluj-Napoca (Romania); Stefan, R. [Agricultural Science and Veterinary Medicine University, 3-5 Calea Manastur, 400372 Cluj-Napoca, Romania and Technical University, 28 Memorandumului, 400114 Cluj-Napoca (Romania)] [Agricultural Science and Veterinary Medicine University, 3-5 Calea Manastur, 400372 Cluj-Napoca, Romania and Technical University, 28 Memorandumului, 400114 Cluj-Napoca (Romania); Bosca, M.; Dan, V.; Pop, V.; Pascuta, P. [Technical University, 28 Memorandumului, 400114 Cluj-Napoca (Romania)] [Technical University, 28 Memorandumului, 400114 Cluj-Napoca (Romania)

2013-11-13T23:59:59.000Z

168

Interstitial-phase precipitation in iron-base alloys: a comparative study  

SciTech Connect (OSTI)

Recent developments have elucidated the atomistic mechanisms of precipitation of interstitial elements in simple alloy systems. However, in the more technologically important iron base alloys, interstitial phase precipitation is generally not well understood. The present experimental study was therefore designed to test the applicability of these concepts to more complex ferrous alloys. Hence, a comparative study was made of interstitial phase precipitation in ferritic Fe-Si-C and in austenitic phosphorus-containing Fe-Cr-Ni steels. These systems were subjected to a variety of quench-age thermal treatments, and the microstructural development was subsequently characterized by transmission electron microscopy.

Pelton, A.R.

1982-06-01T23:59:59.000Z

169

Public good dynamics drive evolution of iron acquisition strategies in natural bacterioplankton populations  

E-Print Network [OSTI]

A common strategy among microbes living in iron-limited environments is the secretion of siderophores, which can bind poorly soluble iron and make it available to cells via active transport mechanisms. Such siderophore–iron ...

Cordero, Otto X.

170

Tricking Iron into Acting like a Rare-earth Element | The Ames...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tricking Iron into Acting like a Rare-earth Element By slipping iron between two nitrogen atoms in a lithium matrix, researchers are able to trick iron into having magnetic...

171

A Comparison of Iron and Steel Production Energy Intensity in China and the U.S  

E-Print Network [OSTI]

pdf Association for Iron and Steel Technology (AIST). 2010a.American BOF Roundup. Iron & Steel Technology. November.for Iron and Steel Technology (AIST). 2010b. 2010 EAF

Price, Lynn

2014-01-01T23:59:59.000Z

172

Arsenic remediation of drinking water using iron-oxide coated coal bottom ash  

E-Print Network [OSTI]

using Iron-oxide Coated Coal Ash. In Arsenic Contaminationwater using  iron?oxide coated coal bottom ash  Johanna L.  using iron-oxide coated coal bottom ash JOHANNA L. MATHIEU

MATHIEU, JOHANNA L.

2010-01-01T23:59:59.000Z

173

Crystal Structure of Iron-dependent Halogenase  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to UserProduct: Crude Oil Period-Unit:Iron-dependent Halogenase Over 4000

174

Rare Iron Oxide in Ancient Chinese Pottery  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromising Science for1PrincipalRare Iron Oxide in Ancient Chinese

175

Suspension Hydrogen Reduction of Iron Oxide Concentrates  

SciTech Connect (OSTI)

The objective of the project is to develop a new ironmaking technology based on hydrogen and fine iron oxide concentrates in a suspension reduction process. The ultimate objective of the new technology is to replace the blast furnace and to drastically reduce CO2 emissions in the steel industry. The goals of this phase of development are; the performance of detailed material and energy balances, thermochemical and equilibrium calculations for sulfur and phosphorus impurities, the determination of the complete kinetics of hydrogen reduction and bench-scale testing of the suspension reduction process using a large laboratory flash reactor.

H.Y. Sohn

2008-03-31T23:59:59.000Z

176

Iron Availability in the Southern Ocean  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for andFuel-Efficient Engines | ornl.govIron

177

Iron Availability in the Southern Ocean  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctober 5,Octoberdeep |Iron

178

Iron Availability in the Southern Ocean  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctober 5,OctoberdeepIron

179

Iron Phosphate Glass-Containing Hanford Waste Simulant  

SciTech Connect (OSTI)

Resolution of the nation's high-level tank waste legacy requires the design, construction, and operation of large and technically complex one-of-a-kind processing waste treatment and vitrification facilities. While the ultimate limits for waste loading and melter efficiency have yet to be defined or realized, significant reductions in glass volumes for disposal and mission life may be possible with advancements in melter technologies and/or glass formulations. This test report describes the experimental results from a small-scale test using the research-scale melter (RSM) at Pacific Northwest National Laboratory (PNNL) to demonstrate the viability of iron-phosphate-based glass with a selected waste composition that is high in sulfate (4.37 wt% SO3). The primary objective of the test was to develop data to support a cost-benefit analysis related to the implementation of phosphate-based glasses for Hanford low-activity waste (LAW) and/or other high-level waste streams within the U.S. Department of Energy complex. The testing was performed by PNNL and supported by Idaho National Laboratory, Savannah River National Laboratory, Missouri University of Science and Technology, and Mo-Sci Corporation.

Sevigny, Gary J.; Kimura, Marcia L.; Fischer, Christopher M.; Schweiger, M. J.; Rodriguez, Carmen P.; Kim, Dong-Sang; Riley, Brian J.

2012-01-18T23:59:59.000Z

180

Iron Phosphate Glass-Containing Hanford Waste Simulant  

SciTech Connect (OSTI)

Resolution of the nation’s high level tank waste legacy requires the design, construction, and operation of large and technically complex one-of-a-kind processing waste treatment and vitrification facilities. While the ultimate limits for waste loading and melter efficiency have yet to be defined or realized, significant reductions in glass volumes for disposal and mission life may be possible with advancements in melter technologies and/or glass formulations. This test report describes the experimental results from a small-scale test using the research scale melter (RSM) at Pacific Northwest National Laboratory (PNNL) to demonstrate the viability of iron phosphate-based glass with a selected waste composition that is high in sulfates (4.37 wt% SO3). The primary objective of the test was to develop data to support a cost-benefit analysis as related to the implementation of phosphate-based glasses for Hanford low activity waste (LAW) and/or other high-level waste streams within the U.S. Department of Energy complex. The testing was performed by PNNL and supported by Idaho National Laboratory, Savannah River National Laboratory, and Mo-Sci Corporation.

Sevigny, Gary J.; Kimura, Marcia L.; Fischer, Christopher M.; Schweiger, Michael J.; Kim, Dong-Sang

2011-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Archaeometallurgical investigation of the iron anchor from the Tantura F shipwreck  

SciTech Connect (OSTI)

The Tantura F shipwreck was a coaster or a fishing vessel about 15.7 m long, discovered in the Dor/Tantura lagoon, Israel in 1995. It was dated to between the mid-7th and the end of the 8th centuries CE. Among the finds excavated were two T-shaped type iron anchors. Of the two anchors, one (anchor A) was thoroughly studied by archaeometallurgical methods in order to identify forge-welding lines, to determine the welding quality and to understand the manufacturing technology. The examinations included X-ray radiography, XRF analysis, optical microscopy, SEM/EDS observation and analysis, OES analysis and microhardness tests. The investigation included characterization of the composition, microstructure, thermal treatments, forge-welding junctions and slag analysis. The results revealed a heterogeneous microstructure, rich in glassy, fayalite and wüstite slag. Iron based phases included ferrite, pearlite, cementite and Widmanstätten plates, all typical to wrought iron. The forge-welds of Anchor A were located. Each arm was made of one piece, weighing about 2.5–3 kg and the shank was made of a few 1.5–2 kg pieces. The second anchor (anchor B) was only briefly examined visually and with a few radiographs, which support the results from anchor A. The research results revealed significant information about T-shaped anchors and their manufacturing process, including hot-working processes without any additional heat treatments, and folding techniques. The microstructure was similar to other ancient simple tools such as saws, sickles, axes and mortise chisels, and though the technology to make complicated structures and objects, such as swords, existed at that time, the anchors did not require this sophistication; thus simpler techniques were used, presumably because they were more cost-effective. - Highlights: ? Tantura F was a coaster dated to mid-7th–end-8th centuries. ? Two iron anchors were discovered at the Tantura F shipwreck-site. ? Anchor A was manufactured from heterogeneous wrought iron blooms. ? Forge-welding lines were detected using archaeometallurgical methods.

Aronson, A. [Faculty of Engineering, Tel Aviv University, Ramat Aviv 69978 (Israel); Ashkenazi, D., E-mail: dana@eng.tau.ac.il [Faculty of Engineering, Tel Aviv University, Ramat Aviv 69978 (Israel); Barkai, O.; Kahanov, Y. [Leon Recanati Institute for Maritime Studies, University of Haifa, Haifa 31905 (Israel)

2013-04-15T23:59:59.000Z

182

Using Disorder to Study How Electrons Pair in Iron-Based Superconducto...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Using Disorder to Study How Electrons Pair in Iron-Based Superconductors Researchers introduced disorder to test electron pairing in iron-based superconductors and produced...

183

Trophic status of Chlamydomonas reinhardtii influences the impact of iron deficiency on photosynthesis  

E-Print Network [OSTI]

of iron de?ciency on photosynthesis Aimee M. Terauchi •rates by suppress- ing photosynthesis but increasing insteadal. 2007). In oxygenic photosynthesis, iron is a cofactor in

Terauchi, Aimee M.; Peers, Graham; Kobayashi, Marilyn C.; Niyogi, Krishna K.; Merchant, Sabeeha S.

2010-01-01T23:59:59.000Z

184

E-Print Network 3.0 - ancient iron plate Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

oceans Noah... Keywords: iron-bacteria iron-formations Fe-isotopes rare earth elements Paleoproterozoic stromatolites We... conducted a geochemical and petrographic...

185

E-Print Network 3.0 - alpha elements iron Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Gordon*a Keywords... : Asymmetric iron(II) amidinate Bridging ligands Metathesis Sublimation kinetics Thermochemistry... A highly volatile asymmetric iron(II) amidinate,...

186

Neutron Scattering Studies of Cuprates and Iron Pnictides.  

E-Print Network [OSTI]

??Presented within are neutron scattering studies of several different high temperature superconducting materials: BaFe1.9Ni0.1As2 [Barium Iron Nickel Arsenic], BaFe1.85Ni0.15As2 [Barium Iron Nickel Arsenic], Ba0.67K0.33Fe2As2 [Barium… (more)

Liu, Mengshu

2014-01-01T23:59:59.000Z

187

Enhanced Superconducting Properties of Iron Chalcogenide Thin Films  

E-Print Network [OSTI]

Among the newly discovered iron-based superconductor, FeSe with the simplest structure and a transition temperature (T_c) around 8 K arouses much research interest. Although its Tc is much lower than that of the cuprates, iron chalcogenide has low...

Chen, Li

2013-07-26T23:59:59.000Z

188

Next Generation Metallic Iron Nodule Technology in Electric Furnace Steelmaking  

Broader source: Energy.gov [DOE]

This factsheet describes a research project whose objective is to investigate reducing processing temperature, controlling the gas temperature and gas atmosphere over metalized iron nodules, and effectively using sub-bituminous coal as a reductant for producing high quality metalized iron nodules at low cost.

189

Investigation of Iron Aluminide Weld Overlays  

SciTech Connect (OSTI)

Conventional fossil fired boilers have been retrofitted with low NO(sub)x burners in order for the power plants to comply with new clean air regulations. Due to the operating characteristics of these burners, boiler tube sulfidation corrosion typically has been enhanced resulting in premature tube failure. To protect the existing panels from accelerated attack, weld overlay coatings are typically being applied. By depositing an alloy that offers better corrosion resistance than the underlying tube material, the wastage rates can be reduced. While Ni-based and stainless steel compositions are presently providing protection, they are expensive and susceptible to failure via corrosion-fatigue due to microsegregation upon solidification. Another material system presently under consideration for use as a coating in the oxidation/sulfidation environments is iron-aluminum. These alloys are relatively inexpensive, exhibit little microsegregation, and show excellent corrosion resistance. However, their use is limited due to weldability issues and their lack of corrosion characterization in simulated low NO(sub)x gas compositions. Therefore a program was initiated in 1996 to evaluate the use of iron-aluminum weld overlay coatings for erosion/corrosion protection of boiler tubes in fossil fired boilers with low NO(sub)x burners. Investigated properties included weldability, corrosion behavior, erosion resistance, and erosion-corrosion performance.

Banovic, S.W.; DuPont, J.B.; Levin, B.F.; Marder, A.R.

1999-08-02T23:59:59.000Z

190

System and method for producing metallic iron nodules  

DOE Patents [OSTI]

A method for producing metallic iron nodules by assembling a shielding entry system to introduce coarse carbonaceous material greater than 6 mesh in to the furnace atmosphere at location(s) where the temperature of the furnace atmosphere adjacent at least partially reduced reducible iron bearing material is between about 2200 and 2650.degree. F. (1200 and 1450.degree. C.), the shielding entry system adapted to inhibit emission of infrared radiation from the furnace atmosphere and seal the furnace atmosphere from exterior atmosphere while introducing coarse carbonaceous material greater than 6 mesh into the furnace to be distributed over the at least partially reduced reducible iron bearing material, and heating the covered at least partially reduced reducible iron bearing material in a fusion atmosphere to assist in fusion and inhibit reoxidation of the reduced material during fusion to assist in fusion and inhibit reoxidation of the reduced material in forming metallic iron nodules.

Bleifuss, Rodney L. (Grand Rapids, MN); Englund, David J. (Bovey, MN); Iwasaki, Iwao (Grand Rapids, MN); Lindgren, Andrew J. (Grand Rapids, MN); Kiesel, Richard F. (Hibbing, MN)

2011-09-20T23:59:59.000Z

191

The iron powder test for naphthenic acid corrosion studies  

SciTech Connect (OSTI)

In the course of an ongoing investigation into the phenomenon of naphthenic acid corrosion, a new test method has evolved and is currently being further developed to substitute the total acid number (TAN or neutralization number) as an indicator for naphthenic acid corrosion potential. It can also be used to complement conventional autoclave corrosion tests in high temperature environments, which are based on weight loss of steel coupons. In this new method an oil sample reacts with pure iron powder within an autoclave heated to the testing temperature. The result is based on the amount of dissolved iron found in the oil sample. The oil sample can dissolve an amount of iron for a given time at a given temperature, depending on the naphthenic acid corrosion, since these acids react with iron to produce oil soluble iron naphthenates. This paper describes the method, compares it with conventional crude corrosiveness testing, and proposes it as a new way of measuring naphthenic acid corrosion potential.

Hau, J.L.; Yepez, O.; Specht, M.I.; Lorenzo, R. [PDVSA-Intevep, Caracas (Venezuela)

1999-11-01T23:59:59.000Z

192

MOSSBAUER STUDIES ON THE STATE OF TIN ATOMS SEGREGATED AT THE GRAIN BOUNDARY OF IRON AND IRON ALLOYS  

E-Print Network [OSTI]

MOSSBAUER STUDIES ON THE STATE OF TIN ATOMS SEGREGATED AT THE GRAIN BOUNDARY OF IRON AND IRON, Tokyo, Japan Abstract.- The binding state of tin atoms segregated at the grain boundary of fine grained state differs considerably from that of solid solution tin even though the average binding force itself

Paris-Sud XI, Université de

193

THE ROLE OF FERRIC IRON UPTAKE REGULATOR (FUR) PROTEIN ON IRON REGULATION IN COXIELLA BURNETII  

E-Print Network [OSTI]

at 37?C for overnight. These cultures were then subcultured in 5mL media with either 50uM ferrous chloride or 200uM deferoxamine, an iron chelator until an OD600 of 0.45-0.55 was reached and the assay performed. Plasmids/Strain#7;Description#7;Source#7... Solution, 98mM KH2PO4, 270mM KCl, 26.8mM NaCl, 40mM MgCl, 0.2mM glucose, 2x spermine, 2x erythritol, 2x para-aminobenzoic acid, 2x NADH, 2x adenine, 2x hypoxanthine, 2x uracil) (Beare, personal communication) with 0uM, 10uM or 50uM iron sulfate. After...

Wilson, Mary J

2006-08-16T23:59:59.000Z

194

Factors influencing biological treatment of MTBE contaminated ground water  

SciTech Connect (OSTI)

Methyl tert-butyl ether (MTBE) contamination has complicated the remediation of gasoline contaminated sites. Many sites are using biological processes for ground water treatment and would like to apply the same technology to MTBE. However, the efficiency and reliability of MTBE biological treatment is not well documented. The objective of this study was to examine the operational and environmental variables influencing MTBE biotreatment. A fluidized bed reactor was installed at a fuel transfer station and used to treat ground water contaminated with MTBE and gasoline hydrocarbons. A complete set of chemical and operational data was collected during this study and a statistical approach was used to determine what variables were influencing MTBE treatment efficiency. It was found that MTBE treatment was more sensitive to up-set than gasoline hydrocarbon treatment. Events, such as excess iron accumulation, inhibited MTBE treatment, but not hydrocarbon treatment. Multiple regression analysis identified biomass accumulation and temperature as the most important variables controlling the efficiency of MTBE treatment. The influent concentration and loading of hydrocarbons, but not MTBE, also impacted MTBE treatment efficiency. The results of this study suggest guidelines for improving MTBE treatment. Long cell retention times in the reactor are necessary for maintaining MTBE treatment. The onset of nitrification only occurs when long cell retention times have been reached and can be used as an indicator in fixed film reactors that conditions favorable to MTBE treatment exist. Conversely, if the reactor can not nitrify, it is unlikely to have stable MTBE treatment.

Stringfellow, William T.; Hines Jr., Robert D.; Cockrum, Dirk K.; Kilkenny, Scott T.

2001-09-14T23:59:59.000Z

195

Kinetics of dissolution and bio-availability of iron in amorphous siliceous iron oxides  

E-Print Network [OSTI]

A&M University Chair of Advisory Committee: Dr. Richard H. Loeppert Amorphous iron (Fe) oxides are of interest because of their high reactivity, surface area, and influence on Fe availability in the soil environment. These materials may have... potential utilization as slow-release Fe amendments for calcareous soils. The objective of this study was to evaluate the impact of various concentrations of silicon (Si), present during precipitation, on the dissolution kinetics of amorphous Fe oxides...

Seaman, John C.

1990-01-01T23:59:59.000Z

196

Theoretical Investigation of Hydrogen Adsorption and Dissociation on Iron and Iron Carbide Surfaces Using the ReaxFF Reactive Force Field Method  

SciTech Connect (OSTI)

We have developed a ReaxFF reactive force field to describe hydrogen adsorption and dissociation on iron and iron carbide surfaces relevant for simulation of Fischer–Tropsch (FT) synthesis on iron catalysts. This force field enables large system (>>1000 atoms) simulations of hydrogen related reactions with iron. The ReaxFF force field parameters are trained against a substantial amount of structural and energetic data including the equations of state and heats of formation of iron and iron carbide related materials, as well as hydrogen interaction with iron surfaces and different phases of bulk iron. We have validated the accuracy and applicability of ReaxFF force field by carrying out molecular dynamics simulations of hydrogen adsorption, dissociation and recombination on iron and iron carbide surfaces. The barriers and reaction energies for molecular dissociation on these two types of surfaces have been compared and the effect of subsurface carbon on hydrogen interaction with iron surface is evaluated. We found that existence of carbon atoms at subsurface iron sites tends to increase the hydrogen dissociation energy barrier on the surface, and also makes the corresponding hydrogen dissociative state relatively more stable compared to that on bare iron. These properties of iron carbide will affect the dissociation rate of H{sub 2} and will retain more surface hydride species, thus influencing the dynamics of the FT synthesis process.

Zou, Chenyu; van Duin, Adri C.T.; Sorescu, Dan C.

2012-06-01T23:59:59.000Z

197

System and method for producing metallic iron  

DOE Patents [OSTI]

A hearth furnace for producing metallic iron material has a furnace housing having a drying/preheat zone, a conversion zone, a fusion zone, and optionally a cooling zone, the conversion zone is between the drying/preheat zone and the fusion zone. A moving hearth is positioned within the furnace housing. A hood or separation barrier within at least a portion of the conversion zone, fusion zone or both separates the fusion zone into an upper region and a lower region with the lower region adjacent the hearth and the upper region adjacent the lower region and spaced from the hearth. An injector introduces a gaseous reductant into the lower region adjacent the hearth. A combustion region may be formed above the hood or separation barrier.

Bleifuss, Rodney L; Englund, David J; Iwasaki, Iwao; Fosnacht, Donald R; Brandon, Mark M; True, Bradford G

2013-09-17T23:59:59.000Z

198

Iron and steel industry process model  

SciTech Connect (OSTI)

The iron and steel industry process model depicts expected energy-consumption characteristics of the iron and steel industry and ancillary industries for the next 25 years by means of a process model of the major steps in steelmaking, from ore mining and scrap recycling to the final finishing of carbon, alloy, and stainless steel into steel products such as structural steel, slabs, plates, tubes, and bars. Two plant types are modeled: fully integrated mills and mini-mills. User-determined inputs into the model are as follows: projected energy and materials prices; projected costs of capacity expansion and replacement; energy-conserving options, both operating modes and investments; the internal rate of return required on investment; and projected demand for finished steel. Nominal input choices in the model for the inputs listed above are as follows: National Academy of Sciences Committee on Nuclear and Alternative Energy Systems Demand Panel nominal energy-price projections for oil, gas, distillates, residuals, and electricity and 1975 actual prices for materials; actual 1975 costs; new technologies added; 15% after taxes; and 1975 actual demand with 1.5%/y growth. The model reproduces the base-year (1975) actual performance of the industry; then, given the above nominal input choices, it projects modes of operation and capacity expansion that minimize the cost of meeting the given final demands for each of 5 years, each year being the midpoint of a 5-year interval. The output of the model includes the following: total energy use and intensity (Btu/ton) by type, by process, and by time period; energy conservation options chosen; utilization rates for existing capacity; capital-investment decisions for capacity expansion.

Sparrow, F.T.; Pilati, D.; Dougherty, T.; McBreen, E.; Juang, L.L.

1980-01-01T23:59:59.000Z

199

RUSTY OLD STARS: A SOURCE OF THE MISSING INTERSTELLAR IRON?  

SciTech Connect (OSTI)

Iron, the universe's most abundant refractory element, is highly depleted in both circumstellar and interstellar environments, meaning it exists in solid form. The nature of this solid is unknown. In this Letter, we provide evidence that metallic iron grains are present around oxygen-rich asymptotic giant branch stars, where it is observationally manifest as a featureless mid-infrared excess. This identification is made using Spitzer Space Telescope observations of evolved globular cluster stars, where iron dust production appears ubiquitous and in some cases can be modeled as the only observed dust product. In this context, FeO is examined as the likely carrier for the 20 {mu}m feature observed in some of these stars. Metallic iron appears to be an important part of the dust condensation sequence at low metallicity, and subsequently plays an influential role in the interstellar medium. We explore the stellar metallicities and luminosities at which iron formation is observed, and how the presence of iron affects the outflow and its chemistry. The conditions under which iron can provide sufficient opacity to drive a wind remain unclear.

McDonald, I.; Zijlstra, A. A.; Markwick, A. J. [Jodrell Bank Centre for Astrophysics, Alan Turing Building, Manchester, M13 9PL (United Kingdom); Sloan, G. C.; Bernard-Salas, J. [Cornell University, Astronomy Department, Ithaca, NY 14853-6801 (United States); Matsunaga, N. [Institute of Astronomy, University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015 (Japan); Matsuura, M. [UCL-Institute of Origins, Astrophysics Group, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom); Kraemer, K. E., E-mail: iain.mcdonald-2@jb.man.ac.u, E-mail: albert.zijlstra@manchester.ac.u, E-mail: andrew.markwick@manchester.ac.u, E-mail: sloan@isc.astro.cornell.ed, E-mail: matsunaga@ioa.s.u-tokyo.ac.j, E-mail: mikako@star.ucl.ac.u [Air Force Research Laboratory, Space Vehicles Directorate, Hanscom AFB, MA 01731 (United States)

2010-07-10T23:59:59.000Z

200

Iron aluminide alloy coatings and joints, and methods of forming  

DOE Patents [OSTI]

Disclosed is a method of joining two bodies together, at least one of the bodies being predominantly composed of metal, the two bodies each having a respective joint surface for joining with the joint surface of the other body, the two bodies having a respective melting point, includes the following steps: (a) providing aluminum metal and iron metal on at least one of the joint surfaces of the two bodies; (b) after providing the aluminum metal and iron metal on the one joint surface, positioning the joint surfaces of the two bodies in juxtaposition against one another with the aluminum and iron positioned therebetween; (c) heating the aluminum and iron on the juxtaposed bodies to a temperature from greater than or equal to 600 C to less than the melting point of the lower melting point body; (d) applying pressure on the juxtaposed surfaces; and (e) maintaining the pressure and the temperature for a time period effective to form the aluminum and iron into an iron aluminide alloy joint which bonds the juxtaposed surfaces and correspondingly the two bodies together. The method can also effectively be used to coat a body with an iron aluminide coating.

Wright, R.N.; Wright, J.K.; Moore, G.A.

1994-09-27T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Iron aluminide alloy coatings and joints, and methods of forming  

DOE Patents [OSTI]

A method of joining two bodies together, at least one of the bodies being predominantly composed of metal, the two bodies each having a respective joint surface for joining with the joint surface of the other body, the two bodies having a respective melting point, includes the following steps: a) providing aluminum metal and iron metal on at least one of the joint surfaces of the two bodies; b) after providing the aluminum metal and iron metal on the one joint surface, positioning the joint surfaces of the two bodies in juxtaposition against one another with the aluminum and iron positioned therebetween; c) heating the aluminum and iron on the juxtaposed bodies to a temperature from greater than or equal to 600.degree. C. to less than the melting point of the lower melting point body; d) applying pressure on the juxtaposed surfaces; and e) maintaining the pressure and the temperature for a time period effective to form the aluminum and iron into an iron aluminide alloy joint which bonds the juxtaposed surfaces and correspondingly the two bodies together. The method can also effectively be used to coat a body with an iron aluminide coating.

Wright, Richard N. (Idaho Falls, ID); Wright, Julie K. (Idaho Falls, ID); Moore, Glenn A. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

202

Iron/soot interaction in a laminar ethylene nonpremixed flame  

SciTech Connect (OSTI)

A laminar, coannular, ethylene/air nonpremixed flame doped with ferrocene additive is employed to address the fundamental question of how iron becomes incorporated into the carbonaceous soot phase, thus interfering with the soot formation processes. The structure and chemical composition of individual aggregates are characterized with respect to flame coordinates via a combination of thermophoretic sampling, transmission electron microscopy, and energy dispersive spectrometry. Soot aggregate microstructure clearly reveals iron occlusion, as well as stratification of soot layers over the occluded phase. The study provides physical evidence that the soot and iron compounds combine in the flame to form a hybrid (inhomogeneous) particulate phase. The reported observations are consistent with the hypothesis that ferrocene decomposes early in the combustion process and before the onset of soot particle inception, thus forming a fine aerosol for the subsequent deposition of carbonaceous substances. Examination of a series of inhomogeneous soot aggregates shows that the flame aerosol composition varies with flame coordinates. In particular, aggregates transported in the soot annulus near the luminous flame front are primarily composed of carbon and oxygen, with traces of iron finely dispersed through the aggregate matrix. On the other hand, carbonaceous soot transported at low heights and near the flame axis contains iron in its elemental form. Finally, soot aggregates in all other areas of the flame contain both iron and oxygen, thus implying the possible presence of iron oxides within the carbonaceous matrix.

Zhang, J.; Megaridis, C.M. [Univ. of Illinois, Chicago, IL (United States). Dept. of Mechanical Engineering

1994-12-31T23:59:59.000Z

203

Spall behavior of cast iron with varying microstructures  

SciTech Connect (OSTI)

The spall strength of cast iron with varying microstructures has been investigated using plate impact at moderate speed. Stress history measurements were made with manganin stress gauges embedded between the back face of the specimen and a low impedance polycarbonate backing. Five separate cast irons were tested. Four of these consisted of gray cast iron with graphite in flake form, with three classified as Type VII A2 and the fourth containing a bimodal distribution of Types VII A4 and VII D8. The fifth casting consisted of ductile cast iron with graphite in nodular form, classified as Type I, size class 5. The spall strength for the Type VII A2 gray cast irons varied between 40 and 370?MPa, and that of the additional gray cast iron, between 410 and 490?MPa. The spall strength of the ductile cast iron fell within the range of 0.94–1.2?GPa. It is shown that the spall strength is linked to the damage level at the spall plane, where an increased level of tensile stress is required to generate higher levels of damage. Post mortem analysis was performed on the recovered samples, revealing the graphite phase to be the primary factor governing the spall fracture of cast irons, where crack nucleation is directly correlated to the debonding of graphite from the metal matrix. The average length of graphite found within a casting is linked to the material's strength, where strength increases as a function of decreasing length. The morphology and mean free path of graphite precipitates further govern the subsequent coalescence of initiated cracks to form a complete fracture plane. In cases where graphite spacing is large, increased energy level is required to complete the fracture process. A secondary factor governing the spall fracture of cast irons has also been linked to the microstructure of the metal matrix, with pearlite yielding higher spall strengths than free ferrite.

Plume, Gifford; Rousseau, Carl-Ernst, E-mail: rousseau@uri.edu [Mechanical Engineering, University of Rhode Island, 92 Upper College Rd., Kingston, Rhode Island 02881 (United States)

2014-07-21T23:59:59.000Z

204

Iron-carbon compacts and process for making them  

DOE Patents [OSTI]

The present invention includes iron-carbon compacts and a process for making them. The process includes preparing a slurry comprising iron powder, furfuryl alcohol, and a polymerization catalyst for initiating the polymerization of the furfuryl alcohol into a resin, and heating the slurry to convert the alcohol into the resin. The resulting mixture is pressed into a green body and heated to form the iron-carbon compact. The compact can be used as, or machined into, a magnetic flux concentrator for an induction heating apparatus.

Sheinberg, Haskell (Santa Fe, NM)

2000-01-01T23:59:59.000Z

205

Iron is the Key to Preserving Dinosaur Soft Tissue  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for andFuel-Efficient Engines | ornl.govIronIronIron

206

Iron is the Key to Preserving Dinosaur Soft Tissue  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctoberOxide WasteIronIronIron

207

Snapshot of iron response in Shewanella oneidensis by gene network reconstruction  

E-Print Network [OSTI]

dissection of the Helicobacter pylori Fur regulatory circuitregulation of the Helicobacter pylori iron-cofactored

Harris, Daniel P.

2010-01-01T23:59:59.000Z

208

Cast B2-phase iron-aluminum alloys with improved fluidity  

DOE Patents [OSTI]

Systems and methods are described for iron aluminum alloys. A composition includes iron, aluminum and manganese. A method includes providing an alloy including iron, aluminum and manganese; and processing the alloy. The systems and methods provide advantages because additions of manganese to iron aluminum alloys dramatically increase the fluidity of the alloys prior to solidification during casting.

Maziasz, Philip J. (122 Clark La., Oak Ridge, TN 37830); Paris, Alan M. (P.O. Box 64, Tarrs, PA 15688); Vought, Joseph D. (124 Cove Point Rd., Rockwood, TN 37854)

2002-01-01T23:59:59.000Z

209

Solar-Powered Air Stripping at the Rocky Flats Site, Colorado - 12361  

SciTech Connect (OSTI)

The U.S. Department of Energy's Rocky Flats Site (the Site), near Denver, Colorado, is a former nuclear weapons facility that was constructed beginning in 1951. With the end of the Cold War, the Site was cleaned up and closed in 2005. Four gravity-driven groundwater treatment systems were installed during cleanup, and their continued operation was incorporated into the final remedy for the Site. All utilities, including electrical power, were removed as part of this closure, so all Site electrical power needs are now met with small solar-powered systems. The Mound Site Plume Treatment System (MSPTS) was installed in 1998 as an innovative system based on zero-valent iron (ZVI). Groundwater flow from the Mound source area containing elevated concentrations of volatile organic compounds (VOCs), primarily in the tetrachloroethene (PCE)-trichloroethene (TCE) family of chlorinated solvents, is intercepted by a collection trench and routed to twin ZVI treatment cells. Later, in 2005, remediation of VOC-contaminated soils at a second up-gradient source area included adding an electron donor to the backfill to help stimulate biodegradation. This reduced concentrations of primary constituents but caused down-gradient groundwater to contain elevated levels of recalcitrant degradation byproducts, particularly cis-1,2-dichloroethene and vinyl chloride. A gravel drain installed as part of the 2005 remediation directs contaminated groundwater from this second source area to the MSPTS for treatment. This additional contaminant load, coupled with correspondingly reduced residence time within the ZVI media due to the increased flow rate, resulted in reduced treatment effectiveness. Elevated concentrations of VOCs were then detected in MSPTS effluent, as well as in surface water at the downstream performance monitoring location for the MSPTS. Subsequent consultations with the Site regulators led to the decision to add a polishing component to reduce residual VOCs in MSPTS effluent. Initially, several alternatives such as commercial air strippers and cascade aerators were evaluated; resulting cost estimates exceeded $100,000. After several simpler alternatives were considered and prototype testing was conducted, the existing effluent metering manhole was converted to house a spray-nozzle based, solar-powered air stripper, at a cost of approximately $20,000. About two-thirds of this cost was for the solar power system, which was initially designed to only provide power for 12 hours per day. Performance data are being collected and adjustments made to optimize the design, determine maintenance requirements, and establish power needs for continuous operation. Analytical data confirm the air stripper is sharply reducing concentrations of residual contaminants. (authors)

Boylan, John A. [S.M. Stoller Corporation, Rocky Flats Site, 11025 Dover Street, Suite 1000, Westminster, Colorado 80021 (United States)

2012-07-01T23:59:59.000Z

210

anthropogenic iron cycles: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

tion in the average odds of each feature occurring within Sandercock, Brett K. 42 Solar Cycle Variations in the Elemental Abundance of Helium and Fractionation of Iron in the...

211

Mechanism of iron catalysis of carbon monoxide decomposition in refractories  

SciTech Connect (OSTI)

The authors discuss the catalytic effects of selected iron phases (metals, oxides, sulfides, and carbides) on the Boudouard reaction studied in an effort to more fully understand the disintegration of refractories when exposed to CO for long periods of time. It was found that active Fe atoms generated from the reduction of the iron oxides, especially {alpha}-Fe/sub 2/O/sub 3/, are the actual catalysts for the Boudouard reaction. The catalytic process confirmed by thermodynamic calculations, kinetic data, and X-ray diffraction data, consists of adsorption and decomposition of CO simultaneously forming carbides of iron. The chemisorption and subsequent decomposition of the iron carbides, rather than diffusion, constitute the rate-controlling process for carbon deposition.

Xu, M.W.P.; Brown, J.J. Jr. (Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (USA). Dept. of Materials Engineering)

1989-01-01T23:59:59.000Z

212

Simulation of iron impurity gettering in crystalline silicon solar cells  

E-Print Network [OSTI]

This work discusses the Impurity-to-Efficiency (12E) simulation tool and applet. The 12E simulator models the physics of iron impurity gettering in silicon solar cells during high temperature processing. The tool also ...

Powell, Douglas M. (Douglas Michael)

2012-01-01T23:59:59.000Z

213

Magnetism and Superconductivity Compete in Iron-based Superconductors...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Magnetism and Superconductivity Compete in Iron-based Superconductors Wednesday, April 30, 2014 HTSC Figure 1 Fig. 1. Measured electronic structure of underdoped Ba1-xKxFe2As2 in...

214

Evidence for a Weak Iron Core at Earth's Center  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Iron Core at Earth's Center Print Seismic waves that pass through the center of the Earth travel faster going from pole to pole than along the equatorial plane-why? One theory...

215

The Iron Spin Transition in the Earth's Lower Mantle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Print It is now known that the iron present in minerals of the lower mantle of the Earth undergoes a pressure-induced transition with pairing of the spins of its 3d electrons....

216

The Iron Spin Transition in the Earth's Lower Mantle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2008 00:00 It is now known that the iron present in minerals of the lower mantle of the Earth undergoes a pressure-induced transition with pairing of the spins of its 3d electrons....

217

Modernization of the iron making plant at SOLLAC FOS  

SciTech Connect (OSTI)

When the blast furnaces at SOLLAC/FOS were relined, the objective being to ensure a worklife of 15 years, it was decided that the iron making plant would be modernized at the same time: the coking plant has been overhauled and renovated and its coking time increased to ensure a worklife of at least 34 years. The surface area of the sinter strand was increased from 400 to 520 m{sup 2}, the burden preparation circuit were simplified, and pig iron production capacity increased from 4.2 to 4.5 million metric tons per year. Coal injection was developed so as to obtain 170 kg/t of pig iron, an expert system was added to ensure more efficient blast furnace operation, and new measures have been carried out for environmental protection. Since these heavy investments have been completed, SOLLAC/FOS is a high-performance iron making plant, allowing it to face new challenges in the future.

Crayelynghe, M. van; Dufour, A.; Soland, J.; Feret, J.; Lebonvallet, J.

1995-12-01T23:59:59.000Z

218

LIQUID PHASE SINTERING OF IRON WITH COPPER BASE ALLOY POWDERS  

E-Print Network [OSTI]

Symposium on Powder Metallurgy - The Iron and Steel Inst.a Liquid Phase", Powder Metallurgy, 17 (33), 227 (1974). H.Other made by powder metallurgy techniques. ses to produce

Chen, M.-H.

2010-01-01T23:59:59.000Z

219

Metal Reduction and Iron Biomineralization by a Psychrotolerant...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

sp. strain PV-4, from the microbial mat at a hydrothermal vent of Loihi Seamount in the Pacific Ocean has been further characterized, with emphases on metal reduction and iron...

220

Method and system for producing metallic iron nuggets  

DOE Patents [OSTI]

A method and system for producing metallic iron nuggets may include providing multiple layers of agglomerates, such as briquettes, balls and extrusions, of a reducible mixture of reducing material (such as carbonaceous material) and of a reducible iron bearing material (such as iron oxide) on a hearth material layer (such as carbonaceous material) and providing a coarse overlayer of carbonaceous material over at least some of the agglomerates. Heating the agglomerates of reducible mixture to 1425.degree. C. or 1400.degree. C. or 1375.degree. C. results in formation of an intermediate product of one or more metallic iron nuggets, which may have a sulfur content of less than 0.03%, and slag, which may have less than 5% mass MgO, which may have a ratio of percent by weight sulfur in the slag over percent by weight sulfur in the metallic nuggets of at least about 12 or at least about 15.

Iwasaki, Iwao; Kiesel, Richard F.; Englund, David J; Hendrickson, Dave

2012-12-18T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Iron-oxide catalyzed silicon photoanode for water splitting  

E-Print Network [OSTI]

This thesis presents an integrated study of high efficiency photoanodes for water splitting using silicon and iron-oxide. The fundamental limitations of silicon to water splitting applications were overcome by an ultrathin ...

Jun, Kimin

2011-01-01T23:59:59.000Z

222

Process for removing technetium from iron and other metals  

DOE Patents [OSTI]

A process for removing technetium from iron and other metals comprises the steps of converting the molten, alloyed technetium to a sulfide dissolved in manganese sulfide, and removing the sulfide from the molten metal as a slag. 4 figs.

Leitnaker, J.M.; Trowbridge, L.D.

1999-03-23T23:59:59.000Z

223

Process for removing technetium from iron and other metals  

DOE Patents [OSTI]

A process for removing technetium from iron and other metals comprises the steps of converting the molten, alloyed technetium to a sulfide dissolved in manganese sulfide, and removing the sulfide from the molten metal as a slag.

Leitnaker, James M. (Kingston, TN); Trowbridge, Lee D. (Oak Ridge, TN)

1999-01-01T23:59:59.000Z

224

Energy intensity in China's iron and steel sector  

E-Print Network [OSTI]

In this study, I examine the spatial and economic factors that influence energy intensity in China's iron and steel sector, namely industrial value added, renovation investment, coke consumption, and local coke supply. ...

Xu, Jingsi, M.C.P. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

225

Polymer-coated iron oxide nanoparticles for medical imaging  

E-Print Network [OSTI]

One of the most versatile and safe materials used in medicine are polymer-coated iron oxide nanoparticles. This dissertation describes several formulations for in vivo imaging applications. The paramagnetic polymer-coated ...

Chen, Suelin, Ph.D. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

226

Microstructure of thin-wall ductile iron castings  

SciTech Connect (OSTI)

The automotive industry is seeking to replace current car parts made of aluminum and iron castings with thin wall (down to 2 mm) iron castings to reduce the cost and weight of automobiles. The mechanical properties of thin wall ductile iron castings are affected strongly by the thickness of the castings. The thinner castings cool at a faster rate, and microstructural features that form during solidification, and subsequently, transform in the solid state, are strongly dependent on a geometrical parameter related to the ratio of surface area-to-volume of the casting. As this ratio becomes larger, castings cool faster. As a result, the nodule count on the observation plane of the specimens increases dramatically (>2000 nodules/mm2 in most specimens), i.e. as the thickness of castings decreases. Also, the matrix of the thin walled ductile iron castings becomes more ferritic as the ratio of surface area-to-volume decreases.

Dogan, Omer N.; Schrems, Karol K.; Hawk, Jeffrey A.; Druschitz, A.P. (Intermet Corp., Lynchburg, VA)

2001-10-01T23:59:59.000Z

227

The relationship between iron and nitrogen fixation in Trichodesmium spp.  

E-Print Network [OSTI]

Trichodesmium spp. are considered the dominant nitrogen (N) fixing cyanobacteria in tropical and subtropical oceans, regimes frequently characterized by low iron (Fe). Limited information exists about what levels of Fe ...

Chappell, Phoebe Dreux

2009-01-01T23:59:59.000Z

228

The industrial ecology of the iron casting industry  

E-Print Network [OSTI]

Metal casting is an energy and materials intensive manufacturing process, which is an important U.S. industry. This study analyzes iron casting, in particular, for possible improvements that will result in greater efficiencies ...

Jones, Alissa J. (Alissa Jean)

2007-01-01T23:59:59.000Z

229

Surface modifications of iron oxide nanoparticles for biological applications  

E-Print Network [OSTI]

Iron oxides magnetic nanoparticles (MPs) of high crystallinity, high magnetization, and size-monodispersity were synthesized with oleic acid as their native ligands. These hydrophobic and non-functionalized MPs have magnetic ...

Insin, Numpon

2011-01-01T23:59:59.000Z

230

Iron limitation and the role of Siderophores in marine Synechococcus  

E-Print Network [OSTI]

Marine cyanobacteria in the genus Synechococcus are widely distributed and contribute significantly to global primary productivity. In many parts of the ocean their growth is limited by a lack of iron, an essential nutrient ...

Rivers, Adam R. (Adam Reid)

2009-01-01T23:59:59.000Z

231

Neutron scattering study of the iron based superconductors.  

E-Print Network [OSTI]

??In most iron-based and copper-oxide superconductors, the Tc [superconducting critical temperature] gradually increases upon charge carrier doping or isovalent doping. In the under-doped regime of… (more)

Wang, Miaoyin

2013-01-01T23:59:59.000Z

232

SLURRY PHASE IRON CATALYSTS FOR INDIRECT COAL LIQUEFACTION  

SciTech Connect (OSTI)

This report describes research conducted to support the DOE program in indirect coal liquefaction. Specifically, they have studied the attrition behavior of iron Fischer-Tropsch catalysts, their interaction with the silica binder and the evolution of iron phases in a synthesis gas conversion process. The results provide significant insight into factors that should be considered in the design of catalysts for converting coal based syngas into liquid fuels.

Abhaya K. Datye

1998-11-19T23:59:59.000Z

233

Slurry Phase Iron Catalysts for Indirect Coal Liquefaction  

SciTech Connect (OSTI)

This report describes research conducted to support the DOE program in indirect coal liquefaction. Specifically, we have studied the attrition behavior of Iron Fischer-Tropsch catalysts, their interaction with the silica binder and the evolution of iron phases in a synthesis gas conversion process. The results provide significant insight into factors that should be considered in the design of catalysts for the conversion of coal-derived synthesis gas into liquid fuels.

Abhaya K. Datye

1998-09-10T23:59:59.000Z

234

Methyl arsenic adsorption and desorption behavior on iron oxides  

E-Print Network [OSTI]

METHYL ARSENIC ADSORPTION AND DESORPTION BEHAVIOR ON IRON OXIDES A Thesis by BRANDON JAMES LAFFERTY Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 2004 Major Subject: Soil Science METHYL ARSENIC ADSORPTION AND DESORPTION BEHAVIOR ON IRON OXIDES A Thesis by BRANDON JAMES LAFFERTY Submitted to Texas A&M University...

Lafferty, Brandon James

2005-08-29T23:59:59.000Z

235

Electrodeposition of binary iron-group alloys  

SciTech Connect (OSTI)

Thin films of NiCo and CoFe have been galvanostatically electroplated onto a platinum rotating disk electrode from simple sulfate baths containing 0.5M of the more noble metal sulfate and 0.1M of the less noble metal sulfate. The experimental results are compared to those of previous studies of NiFe codeposition in order to study the anomalous codeposition behavior of the binary iron-group alloys. Comparison of the electrodeposition results indicates that codeposition of these binary alloys is not totally analogous. It was found that codeposition of NiCo and NiFe show more mass-transfer effects than does CoFe deposition within the range of current densities studied. A model of anomalous codeposition put forth previously for NiFe was applied to the electrodeposition of NiCo and CoFe to determine the extensibility of the model, which assumes metal mono hydroxides, MOH{sup +}, are the important charge-transfer species. This model was unable to characterize fully either NiCo or CoFe electrodeposition. However, with minor changes to the hydrolysis constants used in the model, the model predictions were found to agree with the data for CoFe codeposition and greatly, improve the fit for the NiCo results.

Sasaki, K.Y.; Talbot, J.B. [Univ. of California, San Diego, La Jolla, CA (United States)

1995-03-01T23:59:59.000Z

236

Development of iron phosphate ceramic waste form to immobilize radioactive waste solution  

SciTech Connect (OSTI)

The objective of this research was to develop an iron phosphate ceramic (IPC) waste form using converter slag obtained as a by-product of the steel industry as a source of iron instead of conventional iron oxide. Both synthetic off-gas scrubber solution containing technetium-99 (or Re as a surrogate) and LiCl-KCl eutectic salt, a final waste solution from pyrochemical processing of spent nuclear fuel, were used as radioactive waste streams. The IPC waste form was characterized for compressive strength, reduction capacity, chemical durability, and contaminant leachability. Compressive strengths of the IPC waste form prepared with different types of waste solutions were 16 MPa and 19 MPa for LiCl-KCl eutectic salt and the off-gas scrubber simulant, respectively, which meet the minimum compressive strength of 3.45 MPa (500 psi) for waste forms to be accepted into the radioactive waste repository. The reduction capacity of converter slag, a main dry ingredient used to prepare the IPC waste form, was 4,136 meq/kg by the Ce(IV) method, which is much higher than those of the conventional Fe oxides used for the IPC waste form and the blast furnace slag materials. Average leachability indexes of Tc, Li, and K for the IPC waste form were higher than 6.0, and the IPC waste form demonstrated stable durability even after 63-day leaching. In addition, the Toxicity Characteristic Leach Procedure measurements of converter slag and the IPC waste form with LiCl-KCl eutectic salt met the universal treatment standard of the leachability limit for metals regulated by the Resource Conservation and Recovery Act. This study confirms the possibility of development of the IPC waste form using converter slag, showing its immobilization capability for radionuclides in both LiCl-KCl eutectic salt and off-gas scrubber solutions with significant cost savings.

Choi, Jongkwon; Um, Wooyong; Choung, Sungwook

2014-05-09T23:59:59.000Z

237

Onsite Wastewater Treatment Systems: Aerobic Treatment Unit  

E-Print Network [OSTI]

wastewater treatment systems use. They remove 85 to 98 percent of the organic matter and solids from the wastewater, producing effluent as clean as that from munici- pal wastewater treatment plants, and cleaner than that from conventional septic tanks.... Onsite wastewater treatment systems Single-compartment trash tank Chlorinator Aerobic treatment unit Spray heads Pump tank Bruce Lesikar Professor and Extension Agricultural Engineer The Texas A&M System Aerobic treatment units, which are certified...

Lesikar, Bruce J.

2008-10-31T23:59:59.000Z

238

Interplay between interband coupling and ferromagnetism in iron pnictide superconductor/ferromagnet/iron pnictide superconductor junctions  

SciTech Connect (OSTI)

An extended eight-component Bogoliubov-de Gennes equation is applied to study the Josephson effect between iron-based superconductors (SCs) with s{sub ±}-wave pairing symmetry, separated by an ferromagnet (FM). The feature of damped oscillations of critical Josephson current as a function of FM thickness, the split of the peaks induced by the interband coupling is much different from that for the junction with the s{sub ±}-wave SCs replaced by s{sub ++}-wave ones. In particular, a 0?? transition as a function of interband coupling strength ? is found to always exhibit with the corresponding dip shifting toward the larger ? due to enhancing the spin polarization in the FM, while there exits no 0?? transition for the SC with s{sub ++}-wave pairing symmetry. The two features can be used to identify the pairing symmetry in the iron pnictide SC different from the s{sub ++}-wave one in MgB{sub 2}. Experimentally, by adjusting the doping level in the s{sub ±}-wave SCs, one can vary ?.

Liu, S. Y.; Tao, Y. C., E-mail: yctao88@163.com [Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210023 (China); Hu, J. G. [Department of Physics, Yangzhou University, Yangzhou 225002 (China)

2014-08-28T23:59:59.000Z

239

Exchange bias in Core-Shell Iron-Iron Oxide Nanoclusters  

SciTech Connect (OSTI)

An exchange bias study has been performed on core-shell iron-iron oxide (Fe-Fe3O4) nanoclusters (NCs) of size 11 nm and 14 nm carrying a different core to shell ratio. NCs show complicated behaviors due to competition between interfacial exchange and Zeeman energy in the presence of magnetic field during cooling. These behaviors are accompanied by the evolution of size- dependent cluster structures in the ferromagnetic-core/ferri- or antiferro-magnetic-shell. Smaller clusters have larger coercive field, exchange bias field, and vertical magnetization shift due to the greater contribution from frozen spins of shell/interfaces. These smaller clusters thus also show more dramatic changes with the training effect. Both sizes of clusters display an additional anomaly of the upper part of the hysteresis loop at 10 K under low cooling field (0.1 kOe). This anomaly decreases with number of loop cycles with same field, and disappear with large cooling field (> 0.1 kOe). It may be caused by the competition between the magnetization reversal and the magnetostatic interactions.

Kaur, Maninder; McCloy, John S.; Qiang, You

2013-04-03T23:59:59.000Z

240

The effect of iron dilution on strength of nickel/steel and Monel/steel welds  

SciTech Connect (OSTI)

The weld strength, as a function of iron content, for nickel/steel and Monel/steel welds was determined. Samples were prepared using a Gas Metal Arc (GMAW) automatic process to weld steel plate together with nickel or Monel to produce a range of iron contents typical of weld compositions. Tensile specimens of each iron content were tested to obtain strength and ductility measurements for that weld composition. Data indicate that at iron contents of less than 20% iron in a nickel/steel weld, the weld fails at the weld interface, due to a lack of fusion. Between 20% and 35% iron, the highest iron dilution that could be achieved in a nickel weld, the welds were stronger than the steel base metal. This indicates that a minimum amount of iron dilution (20%) is necessary for good fusion and optimum strength. On the other hand for Monel/steel welds, test results showed that the welds had good strength and integrity between 10% and 27% iron in the weld. Above 35% iron, the welds have less strength and are more brittle. The 35% iron content also corresponds to the iron dilution in Monel welds that has been shown to produce an increase in corrosion rate. This indicates that the iron dilution in Monel welds should be kept below 35% iron to maximize both the strength and corrosion resistance. 2 refs., 6 figs., 3 tabs.

Fout, S.L.; Wamsley, S.D.

1983-03-28T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Application of chlorine dioxide as an oilfield facilities treatment fluid  

SciTech Connect (OSTI)

Both mechanical and chemical treatments are used to clean water flood injection distribution systems whose efficiency has been reduced as a result of plugging material such as iron sulfide sludge. Most mechanical treatments rely on uniform line diameter to be effective, while chemical treatments require good contact with the plugging material for efficient removal. This paper describes the design and operation of a new innovative application using chlorine dioxide for the removal of iron sulfide sludge from water flood injection distribution systems. This technology has evolved from the use of chlorine dioxide in well stimulation applications. The use of chlorine dioxide for continuous treatment of injection brines will also be discussed. Exxon USA`s Hartzog Draw facility in Gillette, Wyoming was the site for the application described. 4,500 barrels of chlorine dioxide was pumped in three phases to clean sixty-six miles of the water flood distribution system. Results indicate that chlorine dioxide was effective in cleaning the well guard screens, the injection lines, frac tanks used to collect the treatment fluids and the injection wells.

Romaine, J.; Strawser, T.G.; Knippers, M.L.

1995-11-01T23:59:59.000Z

242

Dynamics of iron-acceptor-pair formation in co-doped silicon  

SciTech Connect (OSTI)

The pairing dynamics of interstitial iron and dopants in silicon co-doped with phosphorous and several acceptor types are presented. The classical picture of iron-acceptor pairing dynamics is expanded to include the thermalization of iron between different dopants. The thermalization is quantitatively described using Boltzmann statistics and different iron-acceptor binding energies. The proper understanding of the pairing dynamics of iron in co-doped silicon will provide additional information on the electronic properties of iron-acceptor pairs and may become an analytical method to quantify and differentiate acceptors in co-doped silicon.

Bartel, T.; Gibaja, F.; Graf, O.; Gross, D.; Kaes, M.; Heuer, M.; Kirscht, F. [Calisolar GmbH, Magnusstrasse 11, 12489 Berlin (Germany)] [Calisolar GmbH, Magnusstrasse 11, 12489 Berlin (Germany); Möller, C. [CiS Forschungsinstitut für Mikrosensorik und Photovoltaik GmbH, Konrad-Zuse-Str. 14, 99099 Erfurt (Germany) [CiS Forschungsinstitut für Mikrosensorik und Photovoltaik GmbH, Konrad-Zuse-Str. 14, 99099 Erfurt (Germany); TU Ilmenau, Institut für Physik, Weimarer Str. 32, 98693 Ilmenau (Germany); Lauer, K. [CiS Forschungsinstitut für Mikrosensorik und Photovoltaik GmbH, Konrad-Zuse-Str. 14, 99099 Erfurt (Germany)] [CiS Forschungsinstitut für Mikrosensorik und Photovoltaik GmbH, Konrad-Zuse-Str. 14, 99099 Erfurt (Germany)

2013-11-11T23:59:59.000Z

243

Investigation into phosphorus removal by iron ochre for the potential treatment of aquatic phosphorus pollution   

E-Print Network [OSTI]

Phosphorus (P) pollution of waterbodies is a global issue with detrimental environmental, social and economic impacts. Low-cost and sustainable P removal technologies are therefore required to tackle P pollution, whilst ...

Carr, Stephen Thomas David

2012-11-29T23:59:59.000Z

244

MECHANICAL ALLOYING AND THERMAL TREATMENT FOR PRODUCTION OF ZIRCONIUM IRON HYDROGEN ISOTOPE GETTERS  

SciTech Connect (OSTI)

The objective of this task was to demonstrate that metal hydrides could be produced by mechanical alloying in the quantities needed to support production-scale hydrogen isotope separations. Three starting compositions (ratios of elemental Zr and Fe powders) were selected and attritor milled under argon for times of 8 to 60 hours. In general, milling times of at least 24 hours were required to form the desired Zr{sub 2}Fe and Zr{sub 3}Fe phases, although a considerable amount of unalloyed Zr and Fe remained. Milling in liquid nitrogen does not appear to provide any advantages over milling in hexane, particularly due to the formation of ZrN after longer milling times. Carbides of Zr formed during some of the milling experiments in hexane. Elemental Zr was present in the as-milled material but not detected after annealing for milling times of 48 and 60 hours. It may be that after intimate mixing of the powders in the attritor mill the annealing temperature was sufficient to allow for the formation of a Zr-Fe alloy. Further investigation of this conversion is necessary, and could provide an opportunity for reducing the amount of unreacted metal powder after milling.

Fox, K.

2008-02-20T23:59:59.000Z

245

Effect of coating time on corrosion behavior of electroless nickel-phosphorus coated powder metallurgy iron specimens  

SciTech Connect (OSTI)

Powder metallurgy iron specimens with porosities in the range 0% to 2% were electroless coated with nickel-phosphorus alloy from baths containing sodium hypophosphite (NaH{sub 2}PO{sub 2}{center_dot}H{sub 2}O). The effect of coating time on thickness and phosphorus content of the deposit was analyzed. The free corrosion potentials and corrosion rates of the coated specimens were obtained by the Tafel extrapolation method in 1.0 M hydrochloric acid (HCl) solution. Corrosion rates of the coated specimens after heat treatment also were studied. The observed corrosion characteristics were explained by the mixed-potential theory.

Singh, D.; Balasubramaniam, R.; Dube, R.K. [Indian Inst. of Tech., Kanpur (India). Dept. of Materials and Metallurgical Engineering

1995-08-01T23:59:59.000Z

246

Large enhanced dielectric permittivity in polyaniline passivated core-shell nano magnetic iron oxide by plasma polymerization  

SciTech Connect (OSTI)

Commercial samples of Magnetite with size ranging from 25–30?nm were coated with polyaniline by using radio frequency plasma polymerization to achieve a core shell structure of magnetic nanoparticle (core)–Polyaniline (shell). High resolution transmission electron microscopy images confirm the core shell architecture of polyaniline coated iron oxide. The dielectric properties of the material were studied before and after plasma treatment. The polymer coated magnetite particles exhibited a large dielectric permittivity with respect to uncoated samples. The dielectric behavior was modeled using a Maxwell–Wagner capacitor model. A plausible mechanism for the enhancement of dielectric permittivity is proposed.

Joy, Lija K.; Sooraj, V.; Sethulakshmi, N.; Anantharaman, M. R., E-mail: mraiyer@yahoo.com [Department of Physics, Cochin University of Science and Technology, Cochin-682022, Kerala (India); Sajeev, U. S. [Department of Physics, Government College, Kottayam-686613, Kerala (India); Nair, Swapna S. [Department of Physics, School of Mathematical and Physical Sciences, Central University of Kerala, Kasargode-671123, Kerala (India); Narayanan, T. N. [CSIR-Central Electrochemical Research Institute, Karaikkudi-630006, Tamil Nadu (India); Ajayan, P. M. [Department of Material Science and Nano Engineering, Rice University, 6100 Main Street, Houston, Texas 7700 (United States)

2014-03-24T23:59:59.000Z

247

Assessment of Energy Efficiency Improvement and CO2 Emission Reduction Potentials in the Iron and Steel Industry in China  

E-Print Network [OSTI]

Potentials in the Iron and steel Industry in China. Reportfor the U.S. Iron and Steel Industry. An ENERGY STAR Guidebusiness/industry/Iron_Steel_Guide.pdf Worrell, E. Ramesohl,

Hasanbeigi, Ali

2013-01-01T23:59:59.000Z

248

A Comparison of Iron and Steel Production Energy Use and Energy Intensity in China and the U.S.  

E-Print Network [OSTI]

23 5. Comparison of Energy Intensity of Iron and Steelthe U.S. . 27 5.1. Energy Intensity of Iron and27 5.2. Energy Intensity of Iron and Steel Production in

Hasanbeigi, Ali

2012-01-01T23:59:59.000Z

249

Method and system for producing metallic iron nuggets  

DOE Patents [OSTI]

Method and system for producing metallic nuggets includes providing reducible mixture of reducing material (such as carbonaceous material) and reducible iron bearing material (such as iron oxide) that may be arranged in discrete portions, such as mounds or briquettes, on at least a portion of a hearth material layer (such as carbonaceous material). A coarse overlayer of carbonaceous material may be provided over at least some of the discrete portions. Heating the reducible mixture to 1425.degree. C. or 1400.degree. C. or 1375.degree. C. results in formation of an intermediate product of one or more metallic iron nuggets, which may have a sulfur content of less than 0.03%, and slag, which may have less than 5% mass MgO, which may have a ratio of percent by weight sulfur in the slag over percent by weight sulfur in the metallic nuggets of at least about 12 or at least about 15.

Iwasaki, Iwao; Lindgren, Andrew J.; Kiesel, Richard F.

2013-06-25T23:59:59.000Z

250

Fissile sample worths in the Uranium/Iron Benchmark  

SciTech Connect (OSTI)

One of the long-standing problems from LMFBR critical experiments is the central worth discrepancy, the consistent overprediction of the reactivity associated with introducing a small material sample near the center of an assembly. Reactivity (sample worth) experiments in ZPR-9, assembly 34, the Uranium/Iron Benchmark (U/Fe), were aimed at investigating this discrepancy. U/Fe had a large, single-region core whose neutronics was governed almost entirely by /sup 235/U and iron. The essentially one-dimensional plate unit cell had one 1.6 mm-wide column of 93% enriched uranium (U(93)) near the center, imbedded in about 50 mm of iron and stainless steel. The neutron spectrum was roughly comparable to that of an LMFBR, but the adjoint spectrum was much flatter than an LMFBR's. The worths of four different fissile materials were measured and the worth of U(93) was measured using several different experimental techniques.

Schaefer, R.W.; Bucher, R.G.

1983-01-01T23:59:59.000Z

251

XMM-Newton Observations of AGN Iron Line Profiles  

E-Print Network [OSTI]

XMM-Newton observations of type I AGN are presented. The properties of the iron K emission line are reviewed, the majority of AGN observed by XMM-Newton show narrow, unresolved (by XMM) iron lines at 6.4 keV from cold matter that must originate far from the inner accretion disc, perhaps in the putative torus or outer broad line region. The strength of this narrow line appears to decrease with luminosity, implying a reduction in the covering fraction of this material in the more luminous quasars. Few examples of the broad, relativistic iron line profile have been found by XMM-Newton, although in MCG -6-30-15, the extreme breadth of the broad line component may imply a Kerr metric for the central black hole. Generally, relativistic Fe K line profiles are not required in a number of other Seyfert 1 X-ray spectra.

James Reeves

2002-11-18T23:59:59.000Z

252

How Godzilla Ate Pittsburgh: The Long Rise of the Japanese Iron and Steel Industry, 1900–1973  

E-Print Network [OSTI]

poorly endowed as Japan in coking coal and iron ore (WarrenYawata of iron ore for coking coal and the progressive in-

Bernard Elbaum

2007-01-01T23:59:59.000Z

253

A Comparison of Iron and Steel Production Energy Use and Energy Intensity in China and the U.S.  

E-Print Network [OSTI]

of Iron and Steel Production Energy Use and Energy Intensityof Iron and Steel Production Energy Use and Energy Intensitycomparisons of steel production energy efficiency and CO 2

Hasanbeigi, Ali

2012-01-01T23:59:59.000Z

254

Progress report and technical evaluation of the ISCR pilot test conducted at the former CCC/USDA grain storage facility in Centralia, Kansas.  

SciTech Connect (OSTI)

In October, 2007, the Commodity Credit Corporation of the U.S. Department of Agriculture (CCC/USDA) presented the document Interim Measure Conceptual Design (Argonne 2007a) to the Kansas Department of Health and Environment, Bureau of Environmental Remediation (KDHE/BER), for a proposed non-emergency Interim Measure (IM) at the site of the former CCC/USDA grain storage facility in Centralia, Kansas (Figure 1.1). The IM was recommended to mitigate existing levels of carbon tetrachloride contamination identified in the vadose zone soils beneath the former facility and in the groundwater beneath and in the vicinity of the former facility, as well as to moderate or decrease the potential future concentrations of carbon tetrachloride in the groundwater. The Interim Measure Conceptual Design (Argonne 2007a) was developed in accordance with the KDHE/BER Policy No.BERRS-029, Policy and Scope of Work: Interim Measures (KDHE 1996). The hydrogeologic, geochemical, and contaminant distribution characteristics of the Centralia site, as identified by the CCC/USDA, factored into the development of the nonemergency IM proposal. These characteristics were summarized in the Interim Measure Conceptual Design (Argonne 2007a) and were discussed in detail in previous Argonne reports (Argonne 2002a, 2003, 2004, 2005a,b,c, 2006a,b, 2007b). The identified remedial goals of the proposed IM were as follows: (1) To reduce the existing concentrations of carbon tetrachloride in groundwater in three 'hot spot' areas identified at the site (at SB01, SB05, and SB12-MW02; Figure 1.2) to levels acceptable to the KDHE. (2) To reduce carbon tetrachloride concentrations in the soils near the location of former soil boring SB12 and existing monitoring well MW02 (Figure 1.2) to levels below the KDHE Tier 2 Risk-Based Screening Level (RBSL) of 200 {micro}g/kg for this contaminant. To address these goals, the potential application of an in situ chemical reduction (ISCR) treatment technology, employing the use of the EHC{reg_sign} treatment materials marketed by Adventus Americas, Inc. (Freeport, Illinois), was recommended. The EHC materials are proprietary mixtures of food-grade organic carbon and zero-valent iron that are injected into the subsurface as a slurry (EHC) or in dissolved form (EHC-A) and subsequently released slowly into the formation. The materials are designed to create highly reducing geochemical conditions in the vadose and saturated zones that foster both thermodynamic and biological reductive dechlorination of carbon tetrachloride.

LaFreniere, L. M.; Environmental Science Division

2009-01-14T23:59:59.000Z

255

E-Print Network 3.0 - as-cast iron-aluminide alloys Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fe3Al alloys. Proceedings of the International Symposium on Nickel and Iron... . A., and Liu, C. T. 1989. Effect of chromium on properties of iron ... Source: DuPont, John N. -...

256

Sedimentary and mineral dust sources of dissolved iron to the world ocean  

E-Print Network [OSTI]

of the tropi- cal Pacific Ocean II. Iron biogeochemistry,in the Northeast Pacific Ocean Gyre: Aerosols, iron, and theF. M. M. : The equatorial Pacific Ocean: Grazer-controlled

Moore, J. K; Braucher, O.

2008-01-01T23:59:59.000Z

257

Interactions of Fe(II) with the iron oxidizing bacterium Rhodopseudomonas palustris TIE-1  

E-Print Network [OSTI]

Microbial anaerobic iron oxidation has long been of interest to biologists and geologists, both as a possible mechanism for the creation of banded iron formations before the rise of oxygen, and as a model system for organisms ...

Bird, Lina J. (Lina Joana)

2013-01-01T23:59:59.000Z

258

Vessel Cold-Ironing Using a Barge Mounted PEM Fuel Cell: Project...  

Office of Environmental Management (EM)

Vessel Cold-Ironing Using a Barge Mounted PEM Fuel Cell: Project Scoping and Feasibility Vessel Cold-Ironing Using a Barge Mounted PEM Fuel Cell: Project Scoping and Feasibility...

259

Characterization of temperature profile in furnace and solubility of iron in silicon  

E-Print Network [OSTI]

A better understanding of the behavior of impurities, such as iron, in silicon can lead to increases in solar cell efficiency. The purpose of this thesis was to study the behavior of iron in silicon via three sub-tasks: ...

Modi, Vrajesh Y

2011-01-01T23:59:59.000Z

260

Mineralogical and Microbial Controls on Iron Reduction in a Contaminated Aquifer-Wetland System  

E-Print Network [OSTI]

and lepidocrocite); moderately reducible iron (such as goethite, akageneite, and hematite); organically bound iron; magnetite; and pyrite. The second phase of this research involved creating in situ microcosm experiments that exposed native microbial communities...

Howson, Andrea Melissa

2011-02-22T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

A Radar-like Iron based Nanohybrid as an Efficient and Stable...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Radar-like Iron based Nanohybrid as an Efficient and Stable Electrocatalyst for Oxygen Reduction. A Radar-like Iron based Nanohybrid as an Efficient and Stable Electrocatalyst for...

262

V-021: Cisco IronPort Web / Email Security Appliance Sophos Anti...  

Broader source: Energy.gov (indexed) [DOE]

1: Cisco IronPort Web Email Security Appliance Sophos Anti-Virus Multiple Vulnerabilities V-021: Cisco IronPort Web Email Security Appliance Sophos Anti-Virus Multiple...

263

The shielding effect of wild type iron reducing bacterial flora on the corrosion of linepipe steel  

E-Print Network [OSTI]

The shielding effect of wild type iron reducing bacterial flora on the corrosion of linepipe steel (iron reducing bacteria (IRB)) on API 5L Ã?52 carbon steel coupons was investigated. A wild type of IRB

264

Geologic evolution of Iron Mountain, central Mojave Desert, California  

E-Print Network [OSTI]

' quadrangle, mapped Iron Mountain [Dibblee, 1967] at a scale of 1:62,500, and presented the first description of many of the rock types at Iron Mountain. Detailed geologic mapping at 1:12,000 of the entire range, undertaken by S.S. Boettcher in the Fall... by coarsely crystalline dolomitic marble that is massive to finely laminated. A distinct, micaceous quartzite unit, up to 50 m thick, forms aprominent marker. It contains abundant, closely spaced, dark laminations ofbiotite, magnetite and other heavy...

Boettcher, Stefan S.; Walker, J. Douglas

1993-04-01T23:59:59.000Z

265

Iron-phosphorus relationships in Fe chlorisis of sorghum  

E-Print Network [OSTI]

IRON-PHOSPHORUS RELATIONSHIPS IN FE CHLOROSIS OF SORGHUM A Thesis by DENNIS A. MORALES-VARGAS Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requirement for the degree of MASl'ER OF SCIENCE December... 1979 Major Subject: Soil Science IRON-PHOSPHORUS RELATIONSHIPS IN FE CHLOROSI OF SORGHUM A Thesis by DENNIS A. MORALES-VARGAS Approved as to style and content by: \\ J(c'w"H~. v& 4 Cc ~. r&'4 wc' c "&"~ / ~Chairman of Committee ! ~Co-' hai...

Morales-Vargas, Dennis A

1979-01-01T23:59:59.000Z

266

Iron is the Key to Preserving Dinosaur Soft Tissue  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for andFuel-Efficient Engines |Iron is the Key toIron is

267

The Iron Spin Transition in the Earth's Lower Mantle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism in Layered NbS2 and NbSe2DifferentTheInforum LIFTThe Iron SpinThe Iron

268

Iron Catalysis in Oxidations by Ozone - Energy Innovation Portal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctober 5,OctoberdeepIronIron

269

Iron is the Key to Preserving Dinosaur Soft Tissue  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctoberOxide WasteIron andIron

270

Iron is the Key to Preserving Dinosaur Soft Tissue  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctoberOxide WasteIronIron is

271

Iron is the Key to Preserving Dinosaur Soft Tissue  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctoberOxide WasteIronIron

272

Waste Treatment Plant Overview  

Office of Environmental Management (EM)

contracted Bechtel National, Inc., to design and build the world's largest radioactive waste treatment plant. The Waste Treatment and Immobilization Plant (WTP), also known as the...

273

Chromium modified nickel-iron aluminide useful in sulfur bearing environments  

DOE Patents [OSTI]

An improved nickel-iron aluminide containing chromium and molybdenum additions to improve resistance to sulfur attack.

Cathcart, John V. (Knoxville, TN); Liu, Chain T. (Oak Ridge, TN)

1989-06-13T23:59:59.000Z

274

Consequence of total lepton number violation in strongly magnetized iron white dwarfs  

SciTech Connect (OSTI)

The influence of a neutrinoless electron to positron conversion on a cooling of strongly magnetized iron white dwarfs is studied.

Belyaev, V. B. [Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna 141980 (Russian Federation); Ricci, P. [Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, I-50019 Sesto Fiorentino (Firenze) (Italy); Šimkovic, F. [Department of Nuclear Physics and Biophysics, Comenius University, Mlynská dolina F1, SK-842 15, Bratislava, Slovakia and Bogolyubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna 141980 (Russian Federation); Adam, J. Jr.; Tater, M.; Truhlík, E. [Institute of Nuclear Physics ASCR, CZ-250 68 ?ež (Czech Republic)

2013-12-30T23:59:59.000Z

275

Energy and materials savings from gases and solid waste recovery in the iron and steel industry in Brazil: An industrial ecology approach  

SciTech Connect (OSTI)

This paper attempts to investigate, from an entropic point of view, the role of selected technologies in the production, transformation, consumption and release of energy and materials in the Iron and Steel Industry in Brazil. In a quantitative analysis, the potential for energy and materials savings with recovery of heat, gases and tar are evaluated for the Iron and Steel Industry in Brazil. The technologies for heat recovery of gases include Coke Dry Quenching (CDQ), applied only in one of the five Brazilian coke integrated steel plants, Top Gas Pressure Recovery Turbines (TPRT), recovery of Coke Oven Gas (COG), recovery of Blast Furnace Gas (BFG), recovery of BOF gas, recovery of tar, and thermal plant. Results indicate that, in a technical scenario, some 5.1 TWh of electricity can be generated if these technologies are applied to recover these remaining secondary fuels in the Iron and Steel Industry in Brazil, which is equivalent to some 45% of current total electricity consumption in the integrated plants in the country. Finally, solid waste control technologies, including options available for collection and treatment, are discussed. Estimates using the best practice methodology show that solid waste generation in the Iron and Steel Industry in Brazil reached approximately 18 million metric tons in 1994, of which 28% can be recirculated if the best practice available in the country is applied thoroughly.

Costa, M.M.; Schaeffer, R.

1997-07-01T23:59:59.000Z

276

Iron Based Superconductors Jeffrey W. Lynn, NIST Center for Neutron Research  

E-Print Network [OSTI]

Iron Based Superconductors Jeffrey W. Lynn, NIST Center for Neutron Research The phenomenon energy without dissipation. Superconductors have other unique properties such as the ability to expel of superconductors based on iron. These iron-based superconductors have initiated a flurry of activity as researchers

Lynn, Jeffrey W.

277

The Continental Margin is a Key Source of Iron to the HNLC North Pacific Ocean  

E-Print Network [OSTI]

The Continental Margin is a Key Source of Iron to the HNLC North Pacific Ocean Phoebe J. Lam1 concentrations in the upper 500m of the Western Subarctic Pacific, an iron-limited High Nutrient Low Chlorophyll a key source of bioavailable Fe to the HNLC North Pacific. Keywords: iron, continental margin, HNLC 1

278

Phase diagram of iron, revised-core temperatures Thomas J. Ahrens, Kathleen G. Holland,1  

E-Print Network [OSTI]

. In agreement with Brown [2001] the discrepancy between the diamond cell melting data and the iron shock and Ahrens [1998b]. [6] We used polycrystalline iron (99%) targets in the shape of two cylinders that for the VISAR shots, the iron sample is covered with a 0.5 mm thick shim of polycrystalline Mo. [10] For g

Stewart, Sarah T.

279

Highpressure behavior of iron carbide (Fe7C3) at inner core conditions  

E-Print Network [OSTI]

Highpressure behavior of iron carbide (Fe7C3) at inner core conditions Mainak Mookherjee,1 Yoichi at high pressures have demonstrated that Fe7C3 iron carbide is a likely candidate for the Earth's inner behavior of iron carbide (Fe7C3) at inner core conditions, J. Geophys. Res., 116, B04201, doi:10

Steinle-Neumann, Gerd

280

Factors Affecting the Reactvity of Granular Iron in contact with Chlorinated Solvents  

E-Print Network [OSTI]

in column experiments: Connelly Iron (GI)(~3% C) and Electrolytic Iron (EI) (¡Ü 0.01% C). Kinetic data suggested a shift in rate constant (k) and sorption parameters for both iron types with time. This work demonstrated the implication of carbon during...

Firdous, Rubina

2013-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Author's personal copy Hematite and iron carbonate precipitation-coexistence at the  

E-Print Network [OSTI]

Carbon dioxide The hydrothermal reactivity of swelling clays has relevant implications on the geological that the carbon dioxide increased the hydrothermal reactivity of montmorillonite because the hematite and ironAuthor's personal copy Hematite and iron carbonate precipitation-coexistence at the iron

Montes-Hernandez, German

282

Numerical analysis of a model for Nickel-Iron alloy electrodeposition on rotating disk  

E-Print Network [OSTI]

Numerical analysis of a model for Nickel-Iron alloy electrodeposition on rotating disk electrode N the nickel-iron electrodeposition process, we have developed one-dimensional numerical model. This model ad can predict characteristic features of the nickel-iron sys- tem. this work was supported

Paris-Sud XI, Université de

283

Role of Surface Precipitation in Copper Sorption by the Hydrous Oxides of Iron and Aluminum  

E-Print Network [OSTI]

Role of Surface Precipitation in Copper Sorption by the Hydrous Oxides of Iron and Aluminum K. G precipitation; sorption; isotherms; X-ray diffraction; hydrous iron oxide; hydrous aluminum oxide; copper. INTRODUCTION Hydrous oxides of iron (HFO) and aluminum (HAO) are important mineral components of natural

Chorover, Jon

284

HIGH TEMPERATURE SULFIDATION BEHAVIOR OF LOW Al IRON-ALUMINUM COMPOSITIONS  

E-Print Network [OSTI]

HIGH TEMPERATURE SULFIDATION BEHAVIOR OF LOW Al IRON-ALUMINUM COMPOSITIONS S.W. Banovic, J.N. Du (Received January 5, 1998) (Accepted March 23, 1998) Introduction Iron-aluminum weld overlay coatings, the application of iron-aluminum alloys is currently limited due to hydrogen cracking susceptibility subsequent

DuPont, John N.

285

Variable-temperature solid-state NMR studies of iron(II) and iron(III) complexes  

E-Print Network [OSTI]

the first communication reporting the use of C CP/MAS NMR to observe paramagnetic solids directly. Zust as shift reagents had been used in solution-state NMR, selected paramagnetic lanthanide acetates exhibited paramagnetic shifts in the solid state... of the Fe(III) chloride salt yields the w-oxo-bis[porphine- iron(III)] dimer where the two iron centers are bridged via an oxygen. The synthesis, characterization and crystal structure of the metallo-porphyrin dimer w-oxo-bis[tetra- phenylporphineiron...

Shepard, Patricia Arlene

1989-01-01T23:59:59.000Z

286

Studies of anisotropy of iron based superconductors  

SciTech Connect (OSTI)

To study the electronic anisotropy in iron based superconductors, the temperature dependent London penetration depth, {Delta}{lambda}#1;#21;(T), have been measured in several compounds, along with the angular dependent upper critical field, H{sub c2}(T). Study was undertaken on single crystals of Ba(Fe{sub 1-x}Co{sub x}){sub 2}As{sub 2} with x=0.108 and x=0.127, in the overdoped range of the doping phase diagram, characterized by notable modulation of the superconducting gap. Heavy ion irradiation with matching field doses of 6 T and 6.5 T respectively, were used to create columnar defects and to study their effect on the temperature {Delta}{lambda}#1;#21;(T). The variation of the low-temperature penetration depth in both pristine and irradiated samples was #12;tted with a power-law function {Delta}{lambda}#1;#21;(T) = AT{sup n}. Irradiation increases the magnitude of the pre-factor A and decreases the exponent n, similar to the effect on the optimally doped samples. This finding supports the universal s{sub {+-}}#6; scenario for the whole doping range. Knowing that the s{sub {+-}}#6; gap symmetry exists across the superconducting dome for the electron doped systems, we next looked at {lambda}#21;(T), in optimally - doped, SrFe{sub 2}(As{sub 1-x}P{sub x}){sub 2}, x =0.35. Both, as-grown (T{sub c} ~ #25;25 K) and annealed (T{sub c} ~ #25;35 K) single crystals of SrFe{sub 2}(As{sub 1-x}P{sub x}){sub 2} were measured. Annealing decreases the absolute value of the London penetration depth from #21;{lambda}(0) = 300 {+-}#6; 10 nm in as-grown samples to {lambda}#21;(0) = 275{+-}#6;10 nm. At low temperatures, {lambda}#21;(T) #24;~ T indicates a superconducting gap with line nodes. Analysis of the full-temperature range superfluid density is consistent with the line nodes, but differs from the simple single-gap d-wave. The observed behavior is very similar to that of BaFe{sub 2}(As{sub 1-x}P{sub x}){sub 2}, showing that isovalently substituted pnictides are inherently different from the charge-doped materials. In-plane resistivity measurements as a function of temperature, magnetic field, and its orientation with respect to the crystallographic ab-plane were used to study the upper critical field, H{sub c2}, of two overdoped compositions of Ba(Fe{sub 1-x}Ni{sub x}){sub 2}As{sub 2}, x=0.054 and x=0.072. Measurements were performed using precise alignment (with accuracy less than 0.1{degree}) of the magnetic field with respect to the Fe-As plane. The dependence of the H{sub c2} on angle {theta}#18; between the field and the ab- plane was measured in isothermal conditions in a broad temperature range. We found that the shape of the H{sub c2} vs. {theta}#18; curve clearly deviates from the Ginzburg-Landau theory.

Murphy, Jason [Ames Laboratory

2013-05-15T23:59:59.000Z

287

Fischer-Tropsch synthesis over iron-rhodium alloy catalysts  

SciTech Connect (OSTI)

To investigate the nature of iron-rhodium alloy catalysts during the Fischer-Tropsch synthesis, a combination of experimental techniques were applied. Infrared spectroscopy was mainly used to extract direct information on the surface of catalysts under the reaction conditions. In addition, Mossbauer spectroscopy was employed to study the iron alloy catalysts. Further characterization of the catalysts was performed by chemisorption measurements. Hydrocarbon products of the CO + H/sub 2/ synthesis reaction were analyzed by gas chromatography. The working surface of a silica-supported rhodium catalyst was found to be saturated with molecular carbon monoxide. The intensity of the linear carbonyl absorption band remained constant compared to that for room temperature CO adsorption, while that of the bridge-bonded carbonyl absorption band was drastically reduced during the Fischer-Tropsch synthesis. The bridge-bonded adsorption sites are assumed to be the active sites for dissociating carbon monoxide. The hydrogenation rate of the linearly adsorbed carbon monoxide was much slower than the steady state reaction rate. The alloy catalyst did not form a bulk carbide, but the presence of surface carbon was suggested by the large shift of the linear carbonyl absorption band. On the other hand, infrared spectra on an iron catalyst showed only weak bands, indicating a high degree of CO dissociation. On a silica-supported iron-rhodium alloy catalyst, surface analysis by infrared spectroscopy presents evidence of well-mixed alloy formation. Three models of carbon monoxide adsorption were identified.

Choi, S.

1983-01-01T23:59:59.000Z

288

The unexpected properties of alkali metal iron selenide superconductors  

SciTech Connect (OSTI)

The iron-based superconductors that contain FeAs layers as the fundamental building block in the crystal structures have been rationalized in the past using ideas based on the Fermi surface nesting of hole and electron pockets when in the presence of weak Hubbard U interactions. This approach seemed appropriate considering the small values of the magnetic moments in the parent compounds and the clear evidence based on photoemission experiments of the required electron and hole pockets. However, recent results in the context of alkali metal iron selenides, with generic chemical composition AxFe2ySe2 (A alkali metal element), have challenged those previous ideas since at particular compositions y the low-temperature ground states are insulating and display antiferromagnetic order with large iron magnetic moments. Moreover, angle-resolved photoemission studies have revealed the absence of hole pockets at the Fermi level in these materials. The present status of this exciting area of research, with the potential to alter conceptually our understanding of the ironbased superconductors, is here reviewed, covering both experimental and theoretical investigations. Other recent related developments are also briefly reviewed, such as the study of selenide two-leg ladders and the discovery of superconductivity in a single layer of FeSe. The conceptual issues considered established for the alkali metal iron selenides, as well as several issues that still require further work, are discussed.

Dagotto, Elbio R [ORNL

2013-01-01T23:59:59.000Z

289

Oxide Dispersion Strengthened Iron Aluminide by CVD Coated Powders  

SciTech Connect (OSTI)

This I &I Category2 program developed chemical vapor deposition (CVD) of iron, aluminum and aluminum oxide coated iron powders and the availability of high temperature oxidation, corrosion and erosion resistant coating for future power generation equipment and can be used for retrofitting existing fossil-fired power plant equipment. This coating will provide enhanced life and performance of Coal-Fired Boilers components such as fire side corrosion on the outer diameter (OD) of the water wall and superheater tubing as well as on the inner diameter (ID) and OD of larger diameter headers. The program also developed a manufacturing route for readily available thermal spray powders for iron aluminide coating and fabrication of net shape component by powder metallurgy route using this CVD coated powders. This coating can also be applid on jet engine compressor blade and housing, industrial heat treating furnace fixtures, magnetic electronic parts, heating element, piping and tubing for fossil energy application and automotive application, chemical processing equipment , heat exchanger, and structural member of aircraft. The program also resulted in developing a new fabrication route of thermal spray coating and oxide dispersion strengthened (ODS) iron aluminide composites enabling more precise control over material microstructures.

Asit Biswas Andrew J. Sherman

2006-09-25T23:59:59.000Z

290

Reduction of Vinyl Chloride in Metallic Iron-Water Systems  

E-Print Network [OSTI]

Reduction of Vinyl Chloride in Metallic Iron-Water Systems B A O L I N D E N G * Department to groundwater and soil contamination. In particular, VC can be produced as an intermediate in the reductive). Remediation of groundwater contaminated with chlori- nated ethylenes, including vinyl chloride, has been chal

Deng, Baolin

291

Extracellular iron-sulfur precipitates from growth of Desulfovibrio desulfuricans  

SciTech Connect (OSTI)

The authors have examined extracellular iron-bearing precipitates resulting from the growth of Desulfovibrio desulfuricans in a basal medium with lactate as the carbon source and ferrous sulfate. Black precipitates were obtained when D. desulfuricans was grown with an excess of FeSO{sub 4}. When D. desulfuricans was grown under conditions with low amounts of FeSO{sub 4}, brown precipitates were obtained. The precipitates were characterized by iron K-edge XAFS (X-ray absorption fine structure), {sup 57}Fe Moessbauer-effect spectroscopy, and powder X-ray diffraction. Both were noncrystalline and nonmagnetic (at room temperature) solids containing high-spin Fe(III). The spectroscopic data for the black precipitates indicate the formation of an iron-sulfur phase with 6 nearest S neighbors about Fe at an average distance of 2.24(1) {angstrom}, whereas the brown precipitates are an iron-oxygen-sulfur phase with 6 nearest O neighbors about Fe at an average distance of 1.95(1) {angstrom}.

Antonio, M. R.; Tischler, M. L.; Witzcak, D.

1999-12-20T23:59:59.000Z

292

Versatile ferrofluids based on polyethylene glycol coated iron oxide nanoparticles  

E-Print Network [OSTI]

Versatile ferrofluids based on polyethylene glycol coated iron oxide nanoparticles W. Brullot a in revised form 20 December 2011 Available online 3 February 2012 Keywords: Ferrofluid Polyethylene glycol Magneto-optics Magnetite Rheology a b s t r a c t Versatile ferrofluids based on polyethylene glycol

293

ORIGINAL PAPER Electrochemical reduction of oxygen with iron phthalocyanine  

E-Print Network [OSTI]

bio- fuel cells) has been increasing [1­6]. The common point for all the biological systems is need Recent interest in electricity production using microbial fuel cells makes it important to better applications in neutral media. Keywords Microbial fuel cells Á Oxygen reduction Á Iron phthalocyanine Á Redox

294

Octadecylphosphonate (ODP) for corrosion inhibition of iron using  

E-Print Network [OSTI]

of corrosion include pipelines, mining facilities, oil and gas production sites, marine ships, hazmat storageOctadecylphosphonate (ODP) for corrosion inhibition of iron using the T-BAG technique Tiffany V · Cost of corrosion in the U.S. is $276 billion/year, (CC Technologies Laboratories, 2001) ­ Cost

Petta, Jason

295

High Temperature Corrosion Behavior of Iron Aluminide Alloys and Coatings  

SciTech Connect (OSTI)

A multi-year effort has been focused on optimizing the long-term oxidation performance of ingot-processed (IP) and oxide-dispersion strengthened (ODS) Fe{sub 3}Al and iron aluminide-based coatings. Based on results from several composition iterations, a Hf-doped alloy (Fe-28Al-2Cr-0.05at.%Hf) has been developed with significantly better high temperature oxidation resistance than other iron aluminides. The scale adhesion is not significantly better; however, the {alpha}-Al{sub 2}O{sub 3} scale grows at a slower rate, approximately a factor of 10 less than undoped iron aluminide. The benefit of Hf is greatest at 1100-1200 C. Long-term oxidation resistance of commercially fabricated ODS Fe{sub 3}Al has been determined and compared to commercially available ODS FeCrAl. Scale spallation rates for ODS Fe{sub 3}Al are higher than for ODS FeCrAl. To complement studies of iron-aluminide weld-overlay coatings, carbon steel was coated with Fe-Al-Cr by thermal spraying. These specimens were then exposed in air at 900 and 1000 C and in air-1%SO{sub 2} at 800 C. Most likely due to an inadequate aluminum concentration in the coatings, continuous protective Al{sub 2}O{sub 3} could not be maintained and, consequently, the corrosion performance was significantly worse than what is normally observed for Fe{sub 3}Al.

Pint, B.A.

2001-10-22T23:59:59.000Z

296

Sulfur Versus Iron Oxidation in an Iron-Thiolate Model Complex  

SciTech Connect (OSTI)

In the absence of base, the reaction of [Fe{sup II}(TMCS)]PF{sub 6} (1, TMCS = 1-(2-mercaptoethyl)-4,8,11-trimethyl-1,4,8,11-tetraazacyclotetradecane) with peracid in methanol at -20 C did not yield the oxoiron(IV) complex (2, [Fe{sup IV}(O)(TMCS)]PF{sub 6}), as previously observed in the presence of strong base (KO{sup t}Bu). Instead, the addition of 1 equiv of peracid resulted in 50% consumption of 1. The addition of a second equivalent of peracid resulted in the complete consumption of 1 and the formation of a new species 3, as monitored by UV-vis, ESI-MS, and Moessbauer spectroscopies. ESI-MS showed 3 to be formulated as [Fe{sup II}(TMCS) + 2O]{sup +}, while EXAFS analysis suggested that 3 was an O-bound iron(II)-sulfinate complex (Fe-O = 1.95 {angstrom}, Fe-S = 3.26 {angstrom}). The addition of a third equivalent of peracid resulted in the formation of yet another compound, 4, which showed electronic absorption properties typical of an oxoiron(IV) species. Moessbauer spectroscopy confirmed 4 to be a novel iron(IV) compound, different from 2, and EXAFS (Fe{double_bond}O = 1.64 {angstrom}) and resonance Raman ({nu}{sub Fe{double_bond}O} = 831 cm{sup -1}) showed that indeed an oxoiron(IV) unit had been generated in 4. Furthermore, both infrared and Raman spectroscopy gave indications that 4 contains a metal-bound sulfinate moiety ({nu}{sub s}(SO{sub 2}) {approx} 1000 cm{sup -1}, {nu}{sub as}(SO{sub 2}) {approx} 1150 cm{sup -1}). Investigations into the reactivity of 1 and 2 toward H{sup +} and oxygen atom transfer reagents have led to a mechanism for sulfur oxidation in which 2 could form even in the absence of base but is rapidly protonated to yield an oxoiron(IV) species with an uncoordinated thiol moiety that acts as both oxidant and substrate in the conversion of 2 to 3.

A McDonald; M Bukowski; E Farquhar; T Jackson; K Koehntop; M Seo; R De Hont; A Stubna; J Halfen; E Munck

2011-12-31T23:59:59.000Z

297

Overview on backfill materials and permeable reactive barriers for nuclear waste disposal facilities.  

SciTech Connect (OSTI)

A great deal of money and effort has been spent on environmental restoration during the past several decades. Significant progress has been made on improving air quality, cleaning up and preventing leaching from dumps and landfills, and improving surface water quality. However, significant challenges still exist in all of these areas. Among the more difficult and expensive environmental problems, and often the primary factor limiting closure of contaminated sites following surface restoration, is contamination of ground water. The most common technology used for remediating ground water is surface treatment where the water is pumped to the surface, treated and pumped back into the ground or released at a nearby river or lake. Although still useful for certain remediation scenarios, the limitations of pump-and-treat technologies have recently been recognized, along with the need for innovative solutions to ground-water contamination. Even with the current challenges we face there is a strong need to create geological repository systems for dispose of radioactive wastes containing long-lived radionuclides. The potential contamination of groundwater is a major factor in selection of a radioactive waste disposal site, design of the facility, future scenarios such as human intrusion into the repository and possible need for retrieving the radioactive material, and the use of backfills designed to keep the radionuclides immobile. One of the most promising technologies for remediation of contaminated sites and design of radioactive waste repositories is the use of permeable reactive barriers (PRBs). PRBs are constructed of reactive material(s) to intercept and remove the radionuclides from the water and decontaminate the plumes in situ. The concept of PRBs is relatively simple. The reactive material(s) is placed in the subsurface between the waste or contaminated area and the groundwater. Reactive materials used thus far in practice and research include zero valent iron, hydroxyapatite, magnesium oxide, and others. As the contaminant moves through the reactive material, the contaminant is either sorbed by the reactive material or chemically reacts with the material to form a less harmful substance. Because of the high risk associated with failure of a geological repository for nuclear waste, most nations favor a near-field multibarrier engineered system using backfill materials to prevent release of radionuclides into the surrounding groundwater.

Moore, Robert Charles; Hasan, Ahmed Ali Mohamed; Holt, Kathleen Caroline; Hasan, Mahmoud A. (Egyptian Atomic Energy Authority, Cairo, Egypt)

2003-10-01T23:59:59.000Z

298

Iron Aerogel and Xerogel Catalysts for Fischer-Tropsch Synthesis of Diesel Fuel  

SciTech Connect (OSTI)

Iron aerogels, potassium-doped iron aerogels, and potassium-doped iron xerogels have been synthesized and characterized and their catalytic activity in the Fischer-Tropsch (F-T) reaction has been studied. Iron aerogels and xerogels were synthesized by polycondensation of an ethanolic solution of iron(III) chloride hexahydrate with propylene oxide which acts as a proton scavenger for the initiation of hydrolysis and polycondensation. Potassium was incorporated in the iron aerogel and iron xerogel by adding aqueous K{sub 2}CO{sub 3} to the ethanolic solutions of the Fe(III) precursor prior to addition of propylene oxide. Fischer-Tropsch activities of the catalysts were tested in a fixed bed reactor at a pressure of 100 psi with a H{sub 2}:CO ratio of 2:1. Iron aerogels were found to be active for F-T synthesis, and their F-T activities increased on addition of a K containing promoter. Moessbauer spectroscopic data are consistent with an open, nonrigid iron(III) aerogel structure progressing to an iron carbide/metallic iron catalyst via agglomeration as the F-T synthesis proceeds in the course of a 35 h fixed bed reaction test.

Bali, S.; Huggins, F; Huffman, G; Ernst, R; Pugmire, R; Eyring, E

2009-01-01T23:59:59.000Z

299

Use of bimodal carbon distribution in compacts for producing metallic iron nodules  

DOE Patents [OSTI]

A method for use in production of metallic iron nodules comprising providing a reducible mixture into a hearth furnace for the production of metallic iron nodules, where the reducible mixture comprises a quantity of reducible iron bearing material, a quantity of first carbonaceous reducing material of a size less than about 28 mesh of an amount between about 65 percent and about 95 percent of a stoichiometric amount necessary for complete iron reduction of the reducible iron bearing material, and a quantity of second carbonaceous reducing material with an average particle size greater than average particle size of the first carbonaceous reducing material and a size between about 3 mesh and about 48 mesh of an amount between about 20 percent and about 60 percent of a stoichiometric amount of necessary for complete iron reduction of the reducible iron bearing material.

Iwasaki, Iwao

2014-04-08T23:59:59.000Z

300

In-situ measurement of phase transformation kinetics in austempered ductile iron  

SciTech Connect (OSTI)

Austempered ductile iron (ADI) alloyed with 0.42% Mn and 0.72% Cu was heat treated in a mirror furnace and the phase transitions were studied in-situ by neutron diffraction. The heat treatment consisted of austenitisation at 920 °C and isothermal austempering at 400 °C, 350 °C and 300 °C, respectively. Due to the growth of ferrite platelets, the austenite content decreases rapidly at all temperatures within the first 15–20 min and reaches a stable plateau after 35 min (400 °C) to 80 min (300 °C). The carbon content of the residual austenite, which was monitored and characterised by the change of the lattice parameter, increases up to 1.6 wt.% caused by redistribution from the newly formed ferrite. While at higher austempering temperatures this takes place almost parallel to the phase transformation, at 300 °C the redistribution of carbon to austenite lags behind considerably. Furthermore the neutron data revealed an austenite peak asymmetry during austempering which is attributed to successive phase transformation. It results temporarily in two fractions of austenite, an initial low-carbon and an enriched high-carbon modification. - Highlights: • The heat treatment of ADI was studied in detail by in-situ neutron diffraction. • The phase fractions were monitored and evaluated quantitatively. • The austenite carbon content increased up to 1.6 wt.% during austempering. • Peak asymmetries indicate two austenite fractions during highest transformation rates.

Meier, Leopold, E-mail: leopold.meier@utg.de [Technische Universität München, Lehrstuhl für Umformtechnik und Gießereiwesen, Walther-Meißner-Straße 4, 85748 Garching (Germany); Hofmann, Michael, E-mail: michael.hofmann@frm2.tum.de [Technische Universität München, Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Lichtenbergstraße 1, 85748 Garching (Germany); Saal, Patrick, E-mail: patrick.saal@utg.de [Technische Universität München, Lehrstuhl für Umformtechnik und Gießereiwesen, Walther-Meißner-Straße 4, 85748 Garching (Germany); Volk, Wolfram, E-mail: wolfram.volk@utg.de [Technische Universität München, Lehrstuhl für Umformtechnik und Gießereiwesen, Walther-Meißner-Straße 4, 85748 Garching (Germany); Hoffmann, Hartmut, E-mail: hartmut.hoffmann@utg.de [Technische Universität München, Lehrstuhl für Umformtechnik und Gießereiwesen, Walther-Meißner-Straße 4, 85748 Garching (Germany)

2013-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

IEA Energy conservation in the iron and steel industry. [US and Western Europe  

SciTech Connect (OSTI)

The NATO Committee on the Challenges of Modern Society research program, under the auspices of the IEA, had the objectives of collecting data on material requirements and energy-consumption patterns in selected energy-intensive industries in the US and Western Europe, of identifying technologies and operating practices with the potential for energy conservation in those industries, and of recommending research projects that could lead to improved energy efficiency. The steel industry was selected for analysis and ideas for an international cooperative program were developed. Representatives from various countries conducted meetings and the form of an implementing agreement for a research and development program was finalized in December, 1980. The program includes three technical areas: hot-surface inspection, heat recovery, and coal gasification. Hot-surface inspection methods to be demonstrated are: optical, induction, electromagnetic ultrasonic, electromagnetic ultrasonic surface testing methods, and eddy current method for hot surface inspection and an infrared system (possibly). Three heat-recovery projects are: ceramic heat wheel development; demonstration of granular bed/heat pipe system for heat recovery; and demonstration of tubular ceramic recuperators. Processes in coal gasification are: converter process, gas treatment, and iron treatment. Each project is described in detail. (MCW)

Tunnah, B.G.

1981-01-01T23:59:59.000Z

302

Iron beam acceleration using direct plasma injection scheme  

SciTech Connect (OSTI)

A new set of vanes of radio frequency quadrupole (RFQ) accelerator was commissioned using highly charged iron beam. To supply high intensity heavy ion beams to the RFQ, direct plasma injection scheme (DPIS) with a confinement solenoid was adopted. One of the difficulties to utilize the combination of DPIS and a solenoid field is a complexity of electro magnetic field at the beam extraction region, since biasing high static electric field for ion extraction, RFQ focusing field, and the solenoid magnetic field fill the same space simultaneously. To mitigate the complexity, a newly designed magnetic field clamps were used. The intense iron beam was observed with bunched structure and the total accelerated current reached 2.5 nC.

Okamura, M., E-mail: okamura@bnl.gov [Brookhaven National Laboratory, Upton, New York 11973 (United States); RIKEN-BNL Research Center, Upton, New York 11973 (United States); Kanesue, T. [Brookhaven National Laboratory, Upton, New York 11973 (United States)] [Brookhaven National Laboratory, Upton, New York 11973 (United States); Yamamoto, T. [Waseda University, Shinjuku, Tokyo 169-8555 (Japan)] [Waseda University, Shinjuku, Tokyo 169-8555 (Japan); Fuwa, Y. [Kyoto University, Uji, Kyoto 611-0011 (Japan) [Kyoto University, Uji, Kyoto 611-0011 (Japan); RIKEN, Wako, Saitama 351-0198 (Japan)

2014-02-15T23:59:59.000Z

303

Unified Picture for Magnetic Correlations in Iron-Based Superconductors  

SciTech Connect (OSTI)

The varying metallic antiferromagnetic correlations observed in iron-based superconductors are unified in a model consisting of both itinerant electrons and localized spins. The decisive factor is found to be the sensitive competition between the superexchange antiferromagnetism and the orbital-degenerate double-exchange ferromagnetism. Our results reveal the crucial role of Hund's rule coupling for the strongly correlated nature of the system and suggest that the iron-based superconductors are closer kin to manganites than cuprates in terms of their diverse magnetism and incoherent normal-state electron transport. This unified picture would be instrumental for exploring other exotic properties and the mechanism of superconductivity in this new class of superconductors.

Yin, W.G.; Lee, E.-C.; Ku, W.

2010-09-02T23:59:59.000Z

304

The world`s first commercial iron carbide plant  

SciTech Connect (OSTI)

The paper traces the development of Nucor`s investigation of clean iron unit processes, namely, direct reduction, and the decision to build and operate the world`s first commercial iron carbide plant. They first investigated coal based processes since the US has abundant coal reserves, but found a variety of reasons for dropping the coal-based processes from further consideration. A natural gas based process was selected, but the failure to find economically priced gas supplies stopped the development of a US based venture. It was later found that Trinidad had economically priced and abundant supplies of natural gas, and the system of government, the use of English language, and geographic location were also ideal. The cost estimates required modification of the design, but the plant was begun in April, 1993. Start-up problems with the plant are also discussed. Production should commence shortly.

Prichard, L.C.; Schad, D.

1995-12-01T23:59:59.000Z

305

Iron aluminide alloy container for solid oxide fuel cells  

DOE Patents [OSTI]

A container for fuel cells is made from an iron aluminide alloy. The container alloy preferably includes from about 13 to about 22 weight percent Al, from about 2 to about 8 weight percent Cr, from about 0.1 to about 4 weight percent M selected from Zr and Hf, from about 0.005 to about 0.5 weight percent B or from about 0.001 to about 1 weight percent C, and the balance Fe and incidental impurities. The iron aluminide container alloy is extremely resistant to corrosion and metal loss when exposed to dual reducing and oxidizing atmospheres at elevated temperatures. The alloy is particularly useful for containment vessels for solid oxide fuel cells, as a replacement for stainless steel alloys which are currently used.

Judkins, Roddie Reagan (Knoxville, TN); Singh, Prabhakar (Export, PA); Sikka, Vinod Kumar (Oak Ridge, TN)

2000-01-01T23:59:59.000Z

306

Iron aluminide alloys with improved properties for high temperature applications  

DOE Patents [OSTI]

An improved iron aluminide alloy of the DO.sub.3 type that has increased room temperature ductility and improved high elevated temperature strength. The alloy system further is resistant to corrosive attack in the environments of advanced energy corrosion systems such as those using fossil fuels. The resultant alloy is relatively inexpensive as contrasted to nickel based and high nickel steels currently utilized for structural components. The alloy system consists essentially of 26-30 at. % aluminum, 0.5-10 at. % chromium, 0.02-0.3 at. % boron plus carbon, up to 2 at. % molybdenum, up to 1 at. % niobium, up to 0.5 at. % zirconium, up to 0.1 at. % yttrium, up to 0.5 at. % vanadium and the balance iron.

McKamey, Claudette G. (Knoxville, TN); Liu, Chain T. (Oak Ridge, TN)

1990-01-01T23:59:59.000Z

307

Iron aluminide alloys with improved properties for high temperature applications  

DOE Patents [OSTI]

An improved iron aluminide alloy of the DO[sub 3] type is described that has increased room temperature ductility and improved high elevated temperature strength. The alloy system further is resistant to corrosive attack in the environments of advanced energy conversion systems such as those using fossil fuels. The resultant alloy is relatively inexpensive as contrasted to nickel based and high nickel steels currently utilized for structural components. The alloy system consists essentially of 26--30 at. % aluminum, 0.5--10 at. % chromium, 0.02--0.3 at. % boron plus carbon, up to 2 at. % molybdenum, up to 1 at. % niobium, up to 0.5 at. % zirconium, up to 0.1 at. % yttrium, up to 0.5 at. % vanadium and the balance iron. 3 figs.

McKamey, C.G.; Liu, C.T.

1990-10-09T23:59:59.000Z

308

IRON-PHOSPHATE GLASS FOR IMMOBILIZATION OF RADIOACTIVE TECHNETIUM  

SciTech Connect (OSTI)

Technetium-99 (Tc-99) can bring a serious environmental threat because of its high fission yield, long half-life, and high solubility and mobility in the ground water. The present work investigated the immobilization of Tc-99 (surrogated by Re) by heat-treating mixtures of an iron-phosphate glass with 1.5 to 6 wt.% KReO{sub 4} at {approx}1000 C. The Re retention in the glass was as high as {approx}1.2 wt. % while the loss of Re by evaporation during melting was {approx}50%. Re was uniformly distributed within the glass. The normalized Re release by the 7-day Product Consistency Test was {approx}0.39 g/m{sup 2}, comparable with that in phosphate-bonded ceramics and borosilicate glasses. These results suggest that iron-phosphate glass can provide a good matrix for immobilizing Tc-99.

KRUGER AA; HRMA PR; XU K; CHOI J; UM W; HEO J

2012-03-19T23:59:59.000Z

309

Microstructure of thin-wall ductile iron castings  

SciTech Connect (OSTI)

Step plate castings with section thicknesses of 1.5 mm to 6 mm and individual (single) castings with section thicknesses of 2 mm to 6 mm were produced using a ductile iron chemistry. Microstructures of these thin wall ductal iron castings were characterized quantitatively using an image analyzer. Matrix structure (amount of pearlite, ferrite, and massive carbides) and graphite structure (volume fraction, nodule size, nodule content, and nodularity) were investigated as a function of section thickness. Pearlite content, nodule count, and nodularity increased with decreasing section thickness, whereas the nodule size decreased. Nodule content exceeded 2000 nodules per mm{sup 2} at the thinnest sections. Statistical analysis was performed to investigate the effect of casting parameters on the microstructure.

Dogan, Omer N.; Schrems, Karol K.; Hawk, Jeffrey A.

2003-01-01T23:59:59.000Z

310

TECHNOLOGY DEVELOPMENT FOR IRON FISCHER-TROPSCH CATALYSTS  

SciTech Connect (OSTI)

The goal of the proposed work described in this Final Report was the development of iron-based Fischer-Tropsch catalysts that combined high activity, selectivity and life with physical robustness for slurry phase reactors that will produce either low-alpha or high-alpha products. The work described here has optimized the catalyst composition and pretreatment operation for a low-alpha catalyst. In parallel, work has been conducted to design a high-alpha iron catalyst that is suitable for slurry phase synthesis. Studies have been conducted to define the chemical phases present at various stages of the pretreatment and synthesis stages and to define the course of these changes. The oxidation/reduction cycles that are anticipated to occur in large, commercial reactors have been studied at the laboratory scale. Catalyst performance has been determined for catalysts synthesized in this program for activity, selectivity and aging characteristics.

Davis, B.H.

1998-07-22T23:59:59.000Z

311

Iron aluminide useful as electrical resistance heating elements  

DOE Patents [OSTI]

The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, .ltoreq.1% Cr and either .gtoreq.0.05% Zr or ZrO.sub.2 stringers extending perpendicular to an exposed surface of the heating element or .gtoreq.0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B, .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, .ltoreq.1% oxygen, .ltoreq.3% Cu, balance Fe.

Sikka, Vinod K. (Oak Ridge, TN); Deevi, Seetharama C. (Oak Ridge, TN); Fleischhauer, Grier S. (Midlothian, VA); Hajaligol, Mohammad R. (Richmond, VA); Lilly, Jr., A. Clifton (Chesterfield, VA)

2001-01-01T23:59:59.000Z

312

Iron aluminide useful as electrical resistance heating elements  

DOE Patents [OSTI]

The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, .ltoreq.1% Cr and either .gtoreq.0.05% Zr or ZrO.sub.2 stringers extending perpendicular to an exposed surface of the heating element or .gtoreq.0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B, .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, .ltoreq.1% oxygen, .ltoreq.3% Cu, balance Fe.

Sikka, Vinod K. (Oak Ridge, TN); Deevi, Seetharama C. (Oak Ridge, TN); Fleischhauer, Grier S. (Midlothian, VA); Hajaligol, Mohammad R. (Richmond, VA); Lilly, Jr., A. Clifton (Chesterfield, VA)

1999-01-01T23:59:59.000Z

313

Iron aluminide useful as electrical resistance heating elements  

DOE Patents [OSTI]

The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, {<=}1% Cr and either {>=}0.05% Zr or ZrO{sub 2} stringers extending perpendicular to an exposed surface of the heating element or {>=}0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, {<=}2% Ti, {<=}2% Mo, {<=}1% Zr, {<=}1% C, {<=}0.1% B, {<=}30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, {<=}1% rare earth metal, {<=}1% oxygen, {<=}3% Cu, balance Fe. 64 figs.

Sikka, V.K.; Deevi, S.C.; Fleischhauer, G.S.; Hajaligol, M.R.; Lilly, A.C. Jr.

1997-04-15T23:59:59.000Z

314

Iron aluminide useful as electrical resistance heating elements  

DOE Patents [OSTI]

The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, .ltoreq.1% Cr and either .gtoreq.0.05% Zr or ZrO.sub.2 stringers extending perpendicular to an exposed surface of the heating element or .gtoreq.0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B, .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, .ltoreq.1% oxygen, .ltoreq.3% Cu, balance Fe.

Sikka, Vinod K. (Oak Ridge, TN); Deevi, Seetharama C. (Oak Ridge, TN); Fleischhauer, Grier S. (Midlothian, VA); Hajaligol, Mohammad R. (Richmond, VA); Lilly, Jr., A. Clifton (Chesterfield, VA)

1997-01-01T23:59:59.000Z

315

Broad Iron Emission from Gravitationally Lensed Quasars Observed by Chandra  

E-Print Network [OSTI]

Recent work has demonstrated the potential of gravitationally lensed quasars to extend measurements of black hole spin out to high-redshift with the current generation of X-ray observatories. Here we present an analysis of a large sample of 27 lensed quasars in the redshift range 1.0permit the detection of iron emission from the inner accretion disk in individual cases in our sample, we find significant structure in the stacked residuals. In addition to the narrow core, seen almost ubiquitously in local AGN, we find evidence for an additional underlying broad component from the inner accretion disk, with a clear red wing to the emission profile. Based on simulations, we find the detection of this broader component to be significant at greater than the 3-sigma level. This implies that iron emission...

Walton, D J; Miller, J M; Reis, R C; Stern, D; Harrison, F A

2015-01-01T23:59:59.000Z

316

Coal Fly Ash as a Source of Iron in Atmospheric Dust  

SciTech Connect (OSTI)

Anthropogenic coal fly ash aerosols may represent a significant source of bioavailable iron in the open ocean. Few measurements have been made to compare the solubility of atmospheric iron from anthropogenic aerosols and other sources. We report an investigation of the iron dissolution of three fly ash samples in acidic aqueous solutions and compare the solubilities with that of Arizona test dust, a reference material of mineral dust. The effects of pH, cloud processing, and solar irradiation on Fe solubility were explored. Similar to previously reported results on mineral dust, iron in aluminosilicate phases provide predominant dissolved iron compared with iron in oxides. Iron solubility of fly ash is higher than Arizona test dust, especially at the higher pH conditions investigated. Simulated atmospheric processing elevates iron solubility due to significant changes in the morphology aluminosilicate glass, a dominantly material in fly ash particle. Iron continuously releases into the aqueous solution as fly ash particles break up into smaller fragments. The assessment of dissolved atmospheric iron deposition fluxes, and their effect on the biogeochemistry at ocean surface should be constrained by taking into account the source, environment pH, Fe speciation, and solar radiation.

Chen, Haihan; Laskin, Alexander; Baltrusaitis, Jonas; Gorski, Christopher A.; Scherer, Michelle; Grassian, Vicki H.

2012-01-18T23:59:59.000Z

317

Zinc sorption by iron oxides and soil samples  

E-Print Network [OSTI]

(Head of Department) May 1989 ABSTRACT Zinc Sorption by Iron Oxides and Soil Samples. (May 1989) Markku Juhani Yli-Halla, M. S. University of Helsinki, Finland Chair of Advisory Committee: Dr. Richard H. Loeppert Zn sorption by synthetic Fe oxide... and soil samples was studied. The purpose was to examine the effect of crystallinity and adsorbed silica on Zn adsorption by synthetic Fe oxide using goethite and ferrihydrite as test materials. Zn sorption by acid soil samples from Finland and a...

Yli-Halla, Markku Juhani

1989-01-01T23:59:59.000Z

318

Low resistivity contact to iron-pnictide superconductors  

DOE Patents [OSTI]

Method of making a low resistivity electrical connection between an electrical conductor and an iron pnictide superconductor involves connecting the electrical conductor and superconductor using a tin or tin-based material therebetween, such as using a tin or tin-based solder. The superconductor can be based on doped AFe.sub.2As.sub.2, where A can be Ca, Sr, Ba, Eu or combinations thereof for purposes of illustration only.

Tanatar, Makariy; Prozorov, Ruslan; Ni, Ni; Bud'ko, Sergey; Canfield, Paul

2013-05-28T23:59:59.000Z

319

Methods for making a supported iron-copper catalyst  

DOE Patents [OSTI]

A catalyst is described for the synthesis of hydrocarbons from CO+H.sub.2 utilizing a porous Al.sub.2 O.sub.3 support impregnated with iron and copper and optionally promoted with an alkali metal. The use of an Al.sub.2 O.sub.3 support results in the suppression of heavy waxes (C.sub.26 + hydrocarbons), particularly in slurry phase operation, when compared to unsupported or co-precipitated catalysts.

Dyer, Paul N. (Allentown, PA); Pierantozzi, Ronald (Macungie, PA)

1986-01-01T23:59:59.000Z

320

Parkers-Iron Springs, Arkansas: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoading map...(UtilityCounty,Orleans County,PPPSolarParagonThis articlePandaParkers-Iron

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Iron County, Utah: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 - 429 Throttled (bot load)InternationalRenewableIowaIron County is a county in Utah.

322

Iron County, Wisconsin: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 - 429 Throttled (bot load)InternationalRenewableIowaIron County is a county in

323

Iron Junction, Minnesota: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 - 429 Throttled (bot load)InternationalRenewableIowaIron County is a county

324

Blood and hair lead in children with different extents of iron deficiency in Karachi  

SciTech Connect (OSTI)

Childhood iron deficiency has a high incidence in Pakistan. Some but not all studies have shown that dietary iron deficiency may cause increased absorption of lead as both compete for the same transporters in the small intestine. Therefore, children in Pakistan, residing in heavily polluted cities like Karachi may be prone to lead poisoning. This hypothesis was tested by investigating blood and hair lead concentrations in children from Karachi who were divided into four groups of iron status; normal, borderline iron deficiency, iron deficiency and iron deficiency anaemia. A prospective observational study was conducted where 269 children were categorized into four groups of iron status using the World Health Organization criteria and one based on soluble transferrin receptor measurements. Blood iron status was determined using a full blood count, serum iron, ferritin, transferrin saturation and soluble transferrin receptor measurements. Blood lead was determined by graphite atomic absorption spectroscopy, whereas hair lead was assessed using an inductively coupled plasma atomic emission spectroscopy technique. Blood lead concentrations were significantly higher in children with iron deficiency anaemia (mean [95% confidence intervals] were 24.9 [22.6-27.2] {mu}g/dL) compared to those with normal iron status (19.1 [16.8-21.4] {mu}g/dL) using WHO criteria. In contrast, hair lead content was not significantly different in children of different iron status. Our findings reinforce the importance of not only reducing environmental lead pollution but also the development of national health strategies to reduce childhood iron deficiency in Pakistan.

Ataur Rahman, Muhammad; Rahman, Bushra [Karachi Institute of Biotechnology and Genetic Engineering, University of Karachi, Karachi-75270 (Pakistan)] [Karachi Institute of Biotechnology and Genetic Engineering, University of Karachi, Karachi-75270 (Pakistan); Saeed Ahmad, Muhammad [School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD (United Kingdom)] [School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD (United Kingdom); Blann, Andrew [Department of Medicine, City Hospital, Birmingham B18 7QH, United Kingdom. (United Kingdom)] [Department of Medicine, City Hospital, Birmingham B18 7QH, United Kingdom. (United Kingdom); Ahmed, Nessar, E-mail: N.Ahmed@mmu.ac.uk [School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD (United Kingdom)] [School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD (United Kingdom)

2012-10-15T23:59:59.000Z

325

The development of precipitated iron catalysts with improved stability  

SciTech Connect (OSTI)

The goal of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. This report covers testing an iron catalyst. During the last quarter, a new precipitated iron catalyst was prepared and tested in the slurry autoclave reactor at various conditions. This catalyst did not noticeably deactivate during 1250 hours of testing. This quarter, the test was extended to include performance evaluations at different conversion levels ranging from 35 to 88% at 265 and 275{degree}C. The conversion levels were varied by changing the feed rate. The catalytic performance at different conversion intervals was then integrated to approximately predict performance in a bubble column reactor. The run was shut down at the end of 1996 hours because of a 24-hour-power outage. When the power was back on, the run was restarted from room temperature. Catalytic performance during the first 300 hours after the restart-up was monitored. Overall product distributions are being tabulated as analytical laboratory data are obtained. 34 figs., 3 tabs.

Not Available

1990-01-01T23:59:59.000Z

326

Advances in Glass Formulations for Hanford High-Alumimum, High-Iron and Enhanced Sulphate Management in HLW Streams - 13000  

SciTech Connect (OSTI)

The current estimates and glass formulation efforts have been conservative in terms of achievable waste loadings. These formulations have been specified to ensure that the glasses are homogenous, contain essentially no crystalline phases, are processable in joule-heated, ceramic-lined melters and meet Hanford Tank Waste Treatment and Immobilization Plant (WTP) Contract terms. The WTP?s overall mission will require the immobilization of tank waste compositions that are dominated by mixtures of aluminum (Al), chromium (Cr), bismuth (Bi), iron (Fe), phosphorous (P), zirconium (Zr), and sulphur (S) compounds as waste-limiting components. Glass compositions for these waste mixtures have been developed based upon previous experience and current glass property models. Recently, DOE has initiated a testing program to develop and characterize HLW glasses with higher waste loadings and higher throughput efficiencies. Results of this work have demonstrated the feasibility of increases in waste loading from about 25 wt% to 33-50 wt% (based on oxide loading) in the glass depending on the waste stream. In view of the importance of aluminum limited waste streams at Hanford (and also Savannah River), the ability to achieve high waste loadings without adversely impacting melt rates has the potential for enormous cost savings from reductions in canister count and the potential for schedule acceleration. Consequently, the potential return on the investment made in the development of these enhancements is extremely favorable. Glass composition development for one of the latest Hanford HLW projected compositions with sulphate concentrations high enough to limit waste loading have been successfully tested and show tolerance for previously unreported tolerance for sulphate. Though a significant increase in waste loading for high-iron wastes has been achieved, the magnitude of the increase is not as substantial as those achieved for high-aluminum, high-chromium, high-bismuth or sulphur. Waste processing rate increases for high-iron streams as a combined effect of higher waste loadings and higher melt rates resulting from new formulations have been achieved.

Kruger, Albert A.

2013-01-16T23:59:59.000Z

327

Advances in Glass Formulations for Hanford High-Aluminum, High-Iron and Enhanced Sulphate Management in HLW Streams - 13000  

SciTech Connect (OSTI)

The current estimates and glass formulation efforts have been conservative in terms of achievable waste loadings. These formulations have been specified to ensure that the glasses are homogenous, contain essentially no crystalline phases, are processable in joule-heated, ceramic-lined melters and meet Hanford Tank Waste Treatment and Immobilization Plant (WTP) Contract terms. The WTP's overall mission will require the immobilization of tank waste compositions that are dominated by mixtures of aluminum (Al), chromium (Cr), bismuth (Bi), iron (Fe), phosphorous (P), zirconium (Zr), and sulphur (S) compounds as waste-limiting components. Glass compositions for these waste mixtures have been developed based upon previous experience and current glass property models. Recently, DOE has initiated a testing program to develop and characterize HLW glasses with higher waste loadings and higher throughput efficiencies. Results of this work have demonstrated the feasibility of increases in waste loading from about 25 wt% to 33-50 wt% (based on oxide loading) in the glass depending on the waste stream. In view of the importance of aluminum limited waste streams at Hanford (and also Savannah River), the ability to achieve high waste loadings without adversely impacting melt rates has the potential for enormous cost savings from reductions in canister count and the potential for schedule acceleration. Consequently, the potential return on the investment made in the development of these enhancements is extremely favorable. Glass composition development for one of the latest Hanford HLW projected compositions with sulphate concentrations high enough to limit waste loading have been successfully tested and show tolerance for previously unreported tolerance for sulphate. Though a significant increase in waste loading for high-iron wastes has been achieved, the magnitude of the increase is not as substantial as those achieved for high-aluminum, high-chromium, high-bismuth or sulphur. Waste processing rate increases for high-iron streams as a combined effect of higher waste loadings and higher melt rates resulting from new formulations have been achieved. (author)

Kruger, Albert A. [WTP Engineering Division, United States Department of Energy, Office of River Protection, Post Office Box 450, Richland, Washington 99352 (United States)] [WTP Engineering Division, United States Department of Energy, Office of River Protection, Post Office Box 450, Richland, Washington 99352 (United States)

2013-07-01T23:59:59.000Z

328

Measurement and Treatment of Nuisance Odors at Wastewater Treatment Plants  

E-Print Network [OSTI]

the ability of existing treatment technologies at Plant 1 toof existing treatment technologies at both OCSD plantsof existing treatment technologies at both OCSD plants

Abraham, Samantha Margaret

2014-01-01T23:59:59.000Z

329

Mössbauer study of metallic iron and iron oxide nanoparticles having environmental purifying ability  

SciTech Connect (OSTI)

A relationship between local structure and methylene blue (MB) decomposing ability of nanoparticles (NPs) of metallic iron (Fe{sup 0}) and maghemite (??Fe{sub 2}O{sub 3}) was investigated by {sup 57}Fe Mössbauer spectroscopy, X-ray diffractometry and UV-visible light absorption spectroscopy. ??Fe{sub 2}O{sub 3} NPs were successfully prepared by mixing (NH{sub 4}){sub 2}Fe(SO{sub 4}){sub 2}?6H{sub 2}O (Mohr's salt) and (NH{sub 4}){sub 3}Fe(C{sub 2}O{sub 4}){sub 3}?3H{sub 2}O aqueous solution at 30 °C for 1 h, while those of Fe{sup 0} were obtained by the reduction of Mohr's salt with NaBH{sub 4}. From the Scherrer's equation, the smallest crystallite sizes of ??Fe{sub 2}O{sub 3} NPs and Fe{sup 0} NPs were determined to be 9.7 and 1.5 nm, respectively. {sup 57}Fe Mössbauer spectrum of ??Fe{sub 2}O{sub 3} NPs consists of a relaxed sextet with isomer shift (?) of 0.33{sub ±0.01} mm s{sup ?1}, internal magnetic field (H{sub int}) of 25.8{sub ±0.5} T, and linewidth (?) of 0.62{sub ±0.04} mm s{sup ?1}. {sup 57}Fe Mössbauer spectrum of Fe{sup 0} NP is mainly composed of a sextet having ?, ?, and H{sub int} of 0.00{sub ±0.01} mm s{sup ?1} 0.45{sub ±0.01} mm s{sup ?1}, and 22.8{sub ±0.1} T, respectively. A bleaching test of the mixture of Fe{sup 0} and ??Fe{sub 2}O{sub 3} NPs (3:7 ratio, 100 mg) in MB aqueous solution (20 mL) for 6 h showed a remarkable decrease of MB concentration with the first-order rate constant (k{sub MB}) of 6.7 × 10{sup ?1} h{sup ?1}. This value is larger than that obtained for the bleaching test using bulk Fe{sup 0}+??Fe{sub 2}O{sub 3} (3:7) mixture (k{sub MB}?=?6.5×10{sup ?3}h{sup ?1}). These results prove that MB decomposing ability is enhanced by the NPs mixture of Fe{sub 0} and ??Fe{sub 2}O{sub 3}.

Kubuki, Shiro, E-mail: kubuki@tmu.ac.jp; Watanabe, Yuka, E-mail: kubuki@tmu.ac.jp; Akiyama, Kazuhiko, E-mail: kubuki@tmu.ac.jp [Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachi-Oji, Tokyo 192-0397 (Japan); Risti?, Mira; Krehula, Stjepko [Division of Materials Chemistry, Ru?er Boškovi? Institute, P. O. Box 180, Zagreb 10002 (Croatia); Homonnay, Zoltán; Kuzmann, Ern? [Institute of Chemistry, Eötvös Loránd University, P.O. Box 32, 1512 Budapest (Hungary); Nishida, Tetsuaki [Department of Biological and Environmental Chemistry, Faculty of Humanity-Oriented Science and Engineering, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka 820-8555 (Japan)

2014-10-27T23:59:59.000Z

330

Studies on the reduction kinetics of hematite iron ore pellets with noncoking coals for sponge iron plants  

SciTech Connect (OSTI)

In the present investigation, fired pellets were made by mixing hematite iron ore fines of -100, -16+18, and -8+10 mesh size in different ratios and studies on their reduction kinetics in Lakhanpur, Orient OC-2 and Belpahar coals were carried out at temperatures ranging from 850{sup o}C to 1000{sup o}C with a view toward promoting the massive utilization of fines in ironmaking. The rate of reduction in all the fired iron ore pellets increased markedly with an increase in temperature up to 1000{sup o}C, and it was more intense in the first 30min. The values of activation energy, calculated from integral and differential approaches, for the reduction of fired pellets (prepared from iron ore fines of -100 mesh size) in coals were found to be in the range 131-148 and 130-181 kJ mol{sup -1} (for =0.2 to 0.8), indicating the process is controlled by a carbon gasification reaction. The addition of selected larger size particles in the matrix of -100 mesh size fines up to the extent studied decreased the activation energy and slightly increased the reduction rates of resultant fired pellets. In comparison to coal, the reduction of fired pellets in char was characterized by significantly lower reduction rates and higher activation energy.

Kumar, M.; Mohapatra, P.; Patel, S.K. [National Institute of Technology, Rourkela (India). Dept. of Mechanical Engineering

2009-07-01T23:59:59.000Z

331

Laboratory study related to the production and properties of pig iron nuggets  

SciTech Connect (OSTI)

Pig iron nuggets were produced in a laboratory-scale furnace at Michigan Technological University. The process was intended to replicate Kobe Steel's ITmk3 direct ironmaking process. These nuggets were produced from pellets that were made from a mixture of iron oxide, coal, flux and a binder and heated in a furnace with a chamber temperature of 1450{sup o}C. The pellets then self-reduced to produce a solid, high-density, highly metallized (96.5% Fe) pig iron. During the nugget production process, a separate liquid slag phase formed that cleanly separated from the molten metal. The physical and chemical properties of the pig iron nuggets were similar to pig iron produced by blast furnaces, which is distinct from direct reduced iron (DRI).

Anameric, B.; Kawatra, S.K. [Michigan Technological University, Houghton, MI (United States). Dept. for Chemical Engineering

2006-02-15T23:59:59.000Z

332

The effect of graphite nodules on fracture behavior of ductile iron  

E-Print Network [OSTI]

shelf fracture toughness value. In addition, fatigue precrack Charpys were tested both quasi-statically and dynamically to determine the quasi-static and dynamic transition temperatures. The twelve varieties of ductile iron varied in nodule count... advantage ductile iron has over cast steels is very significant. Nevertheless, ductile iron has been excluded from many applications because of its low Charpy impact energy, and hence, its assumed low fracture toughness. Over the past ten years, newer...

Tanner, Glenn Mark

1986-01-01T23:59:59.000Z

333

Iron supplementation at high altitudes induces inflammation and oxidative injury to lung tissues in rats  

SciTech Connect (OSTI)

Exposure to high altitudes is associated with hypoxia and increased vulnerability to oxidative stress. Polycythemia (increased number of circulating erythrocytes) develops to compensate the high altitude associated hypoxia. Iron supplementation is, thus, recommended to meet the demand for the physiological polycythemia. Iron is a major player in redox reactions and may exacerbate the high altitudes-associated oxidative stress. The aim of this study was to explore the potential iron-induced oxidative lung tissue injury in rats at high altitudes (6000 ft above the sea level). Iron supplementation (2 mg elemental iron/kg, once daily for 15 days) induced histopathological changes to lung tissues that include severe congestion, dilatation of the blood vessels, emphysema in the air alveoli, and peribronchial inflammatory cell infiltration. The levels of pro-inflammatory cytokines (IL-1?, IL-6, and TNF-?), lipid peroxidation product and protein carbonyl content in lung tissues were significantly elevated. Moreover, the levels of reduced glutathione and total antioxidant capacity were significantly reduced. Co-administration of trolox, a water soluble vitamin E analog (25 mg/kg, once daily for the last 7 days of iron supplementation), alleviated the lung histological impairments, significantly decreased the pro-inflammatory cytokines, and restored the oxidative stress markers. Together, our findings indicate that iron supplementation at high altitudes induces lung tissue injury in rats. This injury could be mediated through excessive production of reactive oxygen species and induction of inflammatory responses. The study highlights the tissue injury induced by iron supplementation at high altitudes and suggests the co-administration of antioxidants such as trolox as protective measures. - Highlights: • Iron supplementation at high altitudes induced lung histological changes in rats. • Iron induced oxidative stress in lung tissues of rats at high altitudes. • Iron increased the levels of IL-1?, IL-6 and TNF-? in lung tissues at high altitudes. • Trolox alleviated the iron-induced histological and biochemical changes to the lungs.

Salama, Samir A., E-mail: salama.3@buckeyemail.osu.edu [High Altitude Research Center, Taif University, Al-Haweiah, Taif 21974 (Saudi Arabia); Department of Biochemistry, Faculty of Pharmacy, Al-Azhar University, Cairo 11751 (Egypt); Department of Pharmacology and GTMR Unit, College of Clinical Pharmacy, Taif University, Al-Haweiah, Taif 21974 (Saudi Arabia); Omar, Hany A. [Department of Pharmacology, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62514 (Egypt); Maghrabi, Ibrahim A. [Department of Clinical Pharmacy, College of Clinical Pharmacy, Taif University, Al-Haweiah, Taif 21974 (Saudi Arabia); AlSaeed, Mohammed S. [Department of Surgery, College of Medicine, Taif University, Al-Haweiah, Taif 21974 (Saudi Arabia); EL-Tarras, Adel E. [High Altitude Research Center, Taif University, Al-Haweiah, Taif 21974 (Saudi Arabia)

2014-01-01T23:59:59.000Z

334

Contribution of Iron-Reducing Bacteria to Mercury Methylation in Marine Sediments  

E-Print Network [OSTI]

in continental margin sediments off central Chile. Limnologyof microbial iron reduction in sediments of the Baltic-Northreducing bacteria from sediments of an acid stressed lake.

Fleming, Emily J.; Nelson, D C

2006-01-01T23:59:59.000Z

335

ORNL scientists uncover clues to role of magnetism in iron-based...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(865) 574-7308 ORNL scientists uncover clues to role of magnetism in iron-based superconductors Oak Ridge National Laboratory scientists used scanning transmission electron...

336

Preservation of iron(II) by carbon-rich matrices in a hydrothermal plume  

SciTech Connect (OSTI)

Hydrothermal venting associated with mid-ocean ridge volcanism is globally widespread. This venting is responsible for a dissolved iron flux to the ocean that is approximately equal to that associated with continental riverine runoff. For hydrothermal fluxes, it has long been assumed that most of the iron entering the oceans is precipitated in inorganic forms. However, the possibility of globally significant fluxes of iron escaping these mass precipitation events and entering open-ocean cycles is now being debated, and two recent studies suggest that dissolved organic ligands might influence the fate of hydrothermally vented metals. Here we present spectromicroscopic measurements of iron and carbon in hydrothermal plume particles at the East Pacific Rise mid-ocean ridge. We show that organic carbon-rich matrices, containing evenly dispersed iron(II)-rich materials, are pervasive in hydrothermal plume particles. The absence of discrete iron(II) particles suggests that the carbon and iron associate through sorption or complexation. We suggest that these carbon matrices stabilize iron(II) released from hydrothermal vents in the region, preventing its oxidation and/or precipitation as insoluble minerals. Our findings have implications for deep-sea biogeochemical cycling of iron, a widely recognized limiting nutrient in the oceans.

Toner, Brandy M.; Fakra, Sirine C.; Manganini, Steven J.; Santelli, Cara M.; Marcus, Matthew A.; Moffett, James W.; Rouxel, Olivier; German, Christopher R.; Edwards, Katrina J.

2008-09-20T23:59:59.000Z

337

Layer-By-Layer Assembled Hybrid Film of Carbon Nanotubes/Iron...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

By-Layer Assembled Hybrid Film of Carbon NanotubesIron Oxide Nanocrystals for Reagentless Electrochemical Detection of Layer-By-Layer Assembled Hybrid Film of Carbon Nanotubes...

338

E-Print Network 3.0 - advanced iron aluminide-clad Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Molecular to Field Scale Uranium... , Arsenic, and Iron Biogeochemistry at Abandoned Mining Sites Abandoned Uranium Mine Tailings in Harding Source: Borch, Thomas - Department...

339

E-Print Network 3.0 - anaemia iron deficiency Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

that S... causes can lead to anaemia including infections, low dietary iron intake, sickle-cell anaemia... of anaemia in Nigerien children. ... Source: Ecole Polytechnique,...

340

Brittle Failure Design Criteria for Ductile Cast Iron Spent-Fuel  

Office of Scientific and Technical Information (OSTI)

for Ductile and Brittle Failure Design Criteria for Ductile Cast Iron Spent-Fuel Shipping Containers This report was prepared as an account of work sponsored by an...

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Reduction of soot emissions by iron pentacarbonyl in isooctane diffusion flames  

SciTech Connect (OSTI)

Light-scattering measurements, in situ laser-induced fluorescence, and thermophoretic sampling with transmission electron microscopy (TEM) analysis, were performed in laboratory isooctane diffusion flames seeded with 4000 ppm iron pentacarbonyl. These measurements allowed the determination of the evolution of the size, number density, and volume fraction of soot particles through the flame. Comparison to unseeded flame data provided a detailed assessment of the effects of iron addition on soot particle inception, growth, and oxidation processes. Iron was found to produce a minor soot-enhancing effect at early residence times, while subsequent soot particle growth was largely unaffected. It is concluded that primarily elemental iron is incorporated within the soot particles during particle inception and growth. However, iron addition was found to enhance the rate of soot oxidation during the soot burnout regime, yielding a two-thirds reduction in overall soot emissions. In situ spectroscopic measurements probed the transient nature of elemental iron throughout the flame, revealing significant loss of elemental iron, presumably to iron oxides, with increasing flame residence, suggesting catalysis of soot oxidation via iron oxide species. (author)

Kim, K.B.; Masiello, K.A.; Hahn, D.W. [Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611 (United States)

2008-07-15T23:59:59.000Z

342

E-Print Network 3.0 - arsenic rich iron Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2 Processes conducive to the release and transport of arsenic into aquifers of Bangladesh Summary: then by reductive dissolution of iron and arsenic during the ensuing...

343

E-Print Network 3.0 - anaerobically corroding iron Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

This publication provides a general overview of anaero- Summary: . Scrubbing the biogas with iron-impregnated wood chips has been used in anaerobic digesters in municipal......

344

Reactivity of iron-bearing minerals and CO2 sequestration: A...  

Office of Scientific and Technical Information (OSTI)

Reactivity of iron-bearing minerals and CO2 sequestration: A multi-disciplinary experimental approach Re-direct Destination: The reactivity of sandstones was studied under...

345

E-Print Network 3.0 - atmospheric iron corrosion Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

product, iron sulfide, itself may deposit... the corrosion of aluminum. The ... Source: Wood, Thomas K. - Department of Chemical Engineering, Texas A&M University Collection:...

346

Chemistry and Electronic Structure of Iron-Based Superconductors  

SciTech Connect (OSTI)

The solid state provides a richly varied fabric for intertwining chemical bonding, electronic structure, and magnetism. The discovery of superconductivity in iron pnictides and chalcogenides has revealed new aspects of this interplay, especially involving magnetism and superconductivity. Moreover, it has challenged prior thinking about high-temperature superconductivity by providing a set of materials that differ in many crucial aspects from the previously known cuprate superconductors. Here we review some of what is known about the superconductivity and its interplay with magnetism, chemistry, and electronic structure in Fe-based superconductors.

Safa-Sefat, Athena [ORNL; Singh, David J [ORNL

2011-01-01T23:59:59.000Z

347

Synthesis of endohedral iron-fullerenes by ion implantation  

SciTech Connect (OSTI)

In this paper, we discuss the results of our study of the synthesis of endohedral iron-fullerenes. A low energy Fe{sup +} ion beam was irradiated to C{sub 60} thin film by using a deceleration system. Fe{sup +}-irradiated C{sub 60} thin film was analyzed by high performance liquid chromatography and laser desorption/ ionization time-of-flight mass spectrometry. We investigated the performance of the deceleration system for using a Fe{sup +} beam with low energy. In addition, we attempted to isolate the synthesized material from a Fe{sup +}-irradiated C{sub 60} thin film by high performance liquid chromatography.

Minezaki, H.; Ishihara, S. [Graduate School of Engineering, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan)] [Graduate School of Engineering, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan); Uchida, T., E-mail: uchida-t@toyo.jp [Bio-Nano Electronics Research Centre, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan); Muramatsu, M.; Kitagawa, A. [National Institute of Radiological Sciences (NIRS), 4-9-1, Anagawa, Inage-ku, Chiba-shi, Chiba 263-8555 (Japan)] [National Institute of Radiological Sciences (NIRS), 4-9-1, Anagawa, Inage-ku, Chiba-shi, Chiba 263-8555 (Japan); Rácz, R.; Biri, S. [Institute of Nuclear Research (ATOMKI), Bem tér 18/C, H-4026 Debrecen (Hungary)] [Institute of Nuclear Research (ATOMKI), Bem tér 18/C, H-4026 Debrecen (Hungary); Asaji, T. [Oshima National College of Maritime Technology, 1091-1, Komatsu Suou Oshima-city Oshima, Yamaguchi 742-2193 (Japan)] [Oshima National College of Maritime Technology, 1091-1, Komatsu Suou Oshima-city Oshima, Yamaguchi 742-2193 (Japan); Kato, Y. [Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871 (Japan)] [Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871 (Japan); Yoshida, Y. [Graduate School of Engineering, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan) [Graduate School of Engineering, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan); Bio-Nano Electronics Research Centre, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan)

2014-02-15T23:59:59.000Z

348

Iron catalyst for preparation of polymethylene from synthesis gas  

DOE Patents [OSTI]

This invention relates to a process for synthesizing hydrocarbons; more particularly, the invention relates to a process for synthesizing long-chain hydrocarbons known as polymethylene from carbon monoxide and hydrogen or from carbon monoxide and water or mixtures thereof in the presence of a catalyst comprising iron and platinum or palladium or mixtures thereof which may be supported on a solid material, preferably an inorganic refractory oxide. This process may be used to convert a cabon monoxide containing gas to a product which could substitute for high density polyethylene.

Sapienza, Richard S. (Shoreham, NY); Slegeir, William A. (Hampton Bays, NY)

1990-01-01T23:59:59.000Z

349

New iron catalyst for preparation of polymethylene from synthesis gas  

DOE Patents [OSTI]

This invention relates to a process for synthesizing hydrocarbons; more particularly, the invention relates to a process for synthesizing long-chain hydrocarbons known as polymethylene from carbon monoxide and hydrogen or from carbon monoxide and water or mixtures thereof in the presence of a catalyst comprising iron and platinum or palladium or mixtures thereof which may be supported on a solid material, preferably an inorganic refractory oxide. This process may be used to convert a carbon monoxide containing gas to a product which could substitute for high density polyethylene.

Sapienza, R.S.; Slegeir, W.A.

1988-03-31T23:59:59.000Z

350

The iron reduction ability of various rose rootstocks  

E-Print Network [OSTI]

's (Hoagland and Amon 1950) solution, without iron and with NO3 as the nitrogen source (see Appendix 2 for recipe). Solution pH was adjusted with 1N NaOH to 6. 3. All solutions were well aerated with a powerhead air/circulation pump (venturi type Rolf C... with six different Fe +EDTA solutions at the following concentrations: 0, 0. 05, 1, 4, 8, and 48 pM Fe +EDTA (0 to 2. 78 mg liter ). Plants were aerated with a powerhead venturi type air/circulation pump (Rolf C. Hagen Corp, Mansfield MA) to insure...

McDonald, Garry Vernon

2012-06-07T23:59:59.000Z

351

Ultrafast reduction of the total magnetization in iron  

SciTech Connect (OSTI)

Surprisingly, if a ferromagnet is exposed to an ultrafast laser pulse, its apparent magnetization is reduced within less than a picosecond. Up to now, the total magnetization, i.e., the average spin polarization of the whole valence band, was not detectable on a sub-picosecond time scale. Here, we present experimental data, confirming the ultrafast reduction of the total magnetization. Soft x-ray pulses from the free electron laser in Hamburg (FLASH) extract polarized cascade photoelectrons from an iron layer excited by a femtosecond laser pulse. The spin polarization of the emitted electrons is detected by a Mott spin polarimeter.

Fognini, A., E-mail: afognini@phys.ethz.ch; Michlmayr, T. U.; Salvatella, G.; Vaterlaus, A.; Acremann, Y., E-mail: acremann@solid.phys.ethz.ch [Laboratory for Solid State Physics, Otto-Stern-Weg 1, ETH Zurich, 8093 Zurich (Switzerland); Wetli, C. [Multifunktionale Ferroische Mat., Vladimir-Prelog-Weg 1-5/10, ETH Zurich, 8093 Zurich (Switzerland); Ramsperger, U.; Bähler, T.; Pescia, D. [Laboratory for Solid State Physics, Auguste-Piccard-Hof 1, ETH Zurich, 8093 Zurich (Switzerland); Sorgenfrei, F.; Beye, M.; Eschenlohr, A.; Pontius, N.; Föhlisch, A. [Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin (Germany); Stamm, C. [Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin (Germany); Department of Materials, ETH Zurich, Hönggerbergring 64, 8093 Zurich (Switzerland); Hieke, F.; Dell'Angela, M.; Wurth, W. [Institut für Experimentalphysik and Center for Free-Electron Laser Science, Universität Hamburg, 22607 Hamburg (Germany); Jong, S. de; Dürr, H. A. [SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States); and others

2014-01-20T23:59:59.000Z

352

Alkali-lead-iron phosphate glass and associated method  

DOE Patents [OSTI]

A glass composition and method of preparation utilizes a mixture consisting of phosphorus oxide within the range of about 40 to 49 molar percent, lead oxide within the range of about 10 to 25 molar percent, iron oxide within the range of about 10 to 17 molar percent and an alkali oxide within the range of about 23 to 30 molar percent. The glass resulting from the melting and subsequent solidifying of the mixture possesses a high degree of durability and a coefficient of thermal expansion as high as that of any of a number of metals. Such features render this glass highly desirable in glass-to-metal seal applications. 6 figures.

Boatner, L.A.; Sales, B.C.; Franco, S.C.S.

1994-03-29T23:59:59.000Z

353

Alkali-lead-iron phosphate glass and associated method  

DOE Patents [OSTI]

A glass composition and method of preparation utilizes a mixture consisting of phosphorus oxide within the range of about 40 to 49 molar percent, lead oxide within the range of about 10 to 25 molar percent, iron oxide within the range of about 10 to 17 molar percent and an alkali oxide within the range of about 23 to 30 molar percent. The glass resulting from the melting and subsequent solidifying of the mixture possesses a high degree of durability and a coefficient of thermal expansion as high as that of any of a number of metals. Such features render this glass highly desirable in glass-to-metal seal applications.

Boatner, Lynn A. (Oak Ridge, TN); Sales, Brian C. (Knoxville, TN); Franco, Sofia C. S. (Santafe de Bogota, CO)

1994-01-01T23:59:59.000Z

354

Center for Inverse Design Highlight: Iron Chalcogenide PV Absorbers  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6Energy,MUSEUMCongratulations to CEN onWhite LightPracticalIron

355

Characterization and Reactivity of Iron Nanoparticles Prepared with Added  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New Substation SitesStanding FriedelIron-Sulfur3-1 November8-1DerivedfromCu, Pd, and

356

Iron is the Key to Preserving Dinosaur Soft Tissue  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformation for andFuel-Efficient Engines |Iron is the Key to

357

MECS 2006 - Iron and Steel | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department of Energy Low-Temperature CombustionGlass MECS 2006 - Glass ManufacturingIron

358

The Iron Spin Transition in the Earth's Lower Mantle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism in Layered NbS2 and NbSe2DifferentTheInforum LIFTThe Iron Spin

359

The Iron Spin Transition in the Earth's Lower Mantle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism in Layered NbS2 and NbSe2DifferentTheInforum LIFTThe Iron SpinThe

360

The Iron Spin Transition in the Earth's Lower Mantle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism in Layered NbS2 and NbSe2DifferentTheInforum LIFTThe Iron SpinTheThe

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

The Iron Spin Transition in the Earth's Lower Mantle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism in Layered NbS2 and NbSe2DifferentTheInforum LIFTThe Iron

362

Iron is the Key to Preserving Dinosaur Soft Tissue  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctoberOxide WasteIron

363

Lithium Iron Phosphate Composites for Lithium Batteries | Argonne National  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces and Interfaces Sample6, 2011Liisa O'NeillFuelsLaboratory Lithium Iron

364

An Octahedral Coordination Complex of Iron(VI)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICEAmes Laboratory Site| Department ofAn Inside LookAn Iron is

365

Medical Management Treatment Manual  

E-Print Network [OSTI]

Medical Management Treatment Manual: A Clinical Guide for Researchers and Clinicians) This manual is an adaptation of: Medical Management Treatment Manual: A Clinical Research Guide for Medically, Maryland #12;Message to the Users of this Medical Management (MM) Manual from the Editors Background

Bezrukov, Sergey M.

366

Technology and form : iron construction and transformation of architectural ideals in nineteenth century France, 1830-1889.  

E-Print Network [OSTI]

This dissertation investigates the transformation of architectural ideals brought about by the development of iron construction during the nineteenth century in France. The emergence of iron construction paralleled the ...

Lee, Sanghun

1996-01-01T23:59:59.000Z

367

A Comparison of Iron and Steel Production Energy Use and Energy Intensity in China and the U.S.  

E-Print Network [OSTI]

flow models for the US steel industry,” Energy 26, no. 2 (pdf Association for Iron and Steel Technology (AIST). 2010a.American BOF Roundup. Iron & Steel Technology. November.

Hasanbeigi, Ali

2012-01-01T23:59:59.000Z

368

Liquid metal feeding through dendritic region in Ni-Hard white iron  

SciTech Connect (OSTI)

Liquid permeability in the dendritic regions is one of the factors that determine porosity formation and macro segregation in castings. Permeability in the dendritic structure of Ni-Hard white iron was measured as a function of temperature. Effect of microstructural coarsening on the permeability was also investigated. Permeability increased with coarsening dendritic structure in Ni-Hard white iron.

Oryshchyn, Danylo B.; Dogan, Omer N.

2005-01-01T23:59:59.000Z

369

Raman studies of corrosion layers formed on archaeological irons in various media  

E-Print Network [OSTI]

147 Raman studies of corrosion layers formed on archaeological irons in various media Ludovic mandana.saheb@cea.fr, f philippe.dillmann@cea.fr Keywords: Raman spectroscopy, iron corrosion, ancient artefact, imaging. Abstract. The description and identification of corrosion products formed

370

Physics 5, 61 (2012) Untangling the Orbitals in Iron-Based Superconductors  

E-Print Network [OSTI]

Physics 5, 61 (2012) Viewpoint Untangling the Orbitals in Iron-Based Superconductors Daniel-Based Superconductors Jiangping Hu and Ningning Hao Phys. Rev. X 2, 021009 (2012) ­ Published May 30, 2012 The iron-based superconductors have generated great excitement since their discovery in 2008 [1]. They con- stitute a large

Wang, Wei Hua

371

THE ROLE OF IRON PLAQUES IN IMMOBILIZING ARSENIC IN THE RICE-ROOT ENVIRONMENT  

E-Print Network [OSTI]

THE ROLE OF IRON PLAQUES IN IMMOBILIZING ARSENIC IN THE RICE-ROOT ENVIRONMENT by Cecily Eiko Moyer Rights Reserved #12;THE ROLE OF IRON PLAQUES IN IMMOBILIZING ARSENIC IN THE RICE-ROOT ENVIRONMENT 1.1 Arsenic in the Environment

Sparks, Donald L.

372

Microbial reduction of iron(III)-rich nontronite and uranium(VI)1 Gengxin Zhang1  

E-Print Network [OSTI]

1 Microbial reduction of iron(III)-rich nontronite and uranium(VI)1 2 Gengxin Zhang1 , John M Cosmochimica Acta9 10 Title running head: bioreduction of nontronite and uranium11 12 *Corresponding author17 examined the reduction of iron(III)-rich nontronite NAu-2 and uranium(VI) by18 Shewanella

Burgos, William

373

Attrition resistant bulk iron catalysts and processes for preparing and using same  

DOE Patents [OSTI]

An attrition resistant precipitated bulk iron catalyst is prepared from iron oxide precursor and a binder by spray drying. The catalysts are preferably used in carbon monoxide hydrogenation processes such as Fischer-Tropsch synthesis. These catalysts are suitable for use in fluidized-bed reactors, transport reactors and, especially, slurry bubble column reactors.

Jothimurugesan, Kandaswamy (Ponca City, OK); Goodwin, Jr., James G. (Clemson, SC); Gangwal, Santosh K. (Cary, NC)

2007-08-21T23:59:59.000Z

374

Chemically bonded phosphate ceramics of trivalent oxides of iron and manganese  

DOE Patents [OSTI]

A new method for combining elemental iron and other metals to form an inexpensive ceramic to stabilize arsenic, alkaline red mud wastes, swarfs, and other iron or metal-based additives, to create products and waste forms which can be poured or dye cast.

Wagh, Arun S. (Orland Park, IL); Jeong, Seung-Young (Westmont, IL)

2002-01-01T23:59:59.000Z

375

(Iron regulation of gene expression in the Bradyrhizobium japonicum/soybean symbiosis)  

SciTech Connect (OSTI)

We wish to address the question of whether iron plays a regulatory role in the Bradyrhizobium japonicum/soybeam symbiosis. Iron may be an important regulatory signal in planta as the bacteria must acquire iron from their plant hosts and iron-containing proteins figure prominently in all nitrogen-fixing symbioses. For example, the bacterial partner is believed to synthesize the heme moiety of leghemoglobin, which may represent as much as 25--30% of the total soluble protein in an infected plant cell. For this reason, we have focused our attention on the regulation by iron of the first step in the bacterial heme biosynthetic pathway. The enzyme which catalyzes this step, 5-aminolevulinic acid synthase, is encoded by the hemA gene which we had previously cloned and sequenced. Specific objectives include: to define the cis-acting sequences which confer iron regulation on the B. japonicum hemA gene; to identify trans-acting factors which regulate the expression of hemA by iron; to identify new loci which are transcriptionally responsive to changes in iron availability; and to examine the effects of mutations in various known regulatory genes for their effect on the expression of hemA.

Guerinot, M.L.

1992-01-01T23:59:59.000Z

376

[Iron regulation of gene expression in the Bradyrhizobium japonicum/soybean symbiosis]. Progress report  

SciTech Connect (OSTI)

We wish to address the question of whether iron plays a regulatory role in the Bradyrhizobium japonicum/soybeam symbiosis. Iron may be an important regulatory signal in planta as the bacteria must acquire iron from their plant hosts and iron-containing proteins figure prominently in all nitrogen-fixing symbioses. For example, the bacterial partner is believed to synthesize the heme moiety of leghemoglobin, which may represent as much as 25--30% of the total soluble protein in an infected plant cell. For this reason, we have focused our attention on the regulation by iron of the first step in the bacterial heme biosynthetic pathway. The enzyme which catalyzes this step, 5-aminolevulinic acid synthase, is encoded by the hemA gene which we had previously cloned and sequenced. Specific objectives include: to define the cis-acting sequences which confer iron regulation on the B. japonicum hemA gene; to identify trans-acting factors which regulate the expression of hemA by iron; to identify new loci which are transcriptionally responsive to changes in iron availability; and to examine the effects of mutations in various known regulatory genes for their effect on the expression of hemA.

Guerinot, M.L.

1992-06-01T23:59:59.000Z

377

Iron control of past productivity in the coastal upwelling system off the Atacama Desert, Chile  

E-Print Network [OSTI]

Iron control of past productivity in the coastal upwelling system off the Atacama Desert, Chile in the productivity of the upwelling system off presently arid northern Chile during the last 100,000 years. Changes in productivity are found to be in phase with the precessional cycle ($20,000 years) and with inputs of iron from

Demouchy, Sylvie

378

Electrical conductivity as an indicator of iron reduction rates in abiotic and biotic systems  

E-Print Network [OSTI]

Electrical conductivity as an indicator of iron reduction rates in abiotic and biotic systems Aaron; published 16 April 2011. [1] Although changes in bulk electrical conductivity (b) in aquifers have been. To explore the use of electrical conductivity to measure reaction rates, we conducted iron oxide reduction

Singha, Kamini

379

Melting of Iron under Earth's Core Conditions from Diffusion Monte Carlo Free Energy Calculations  

E-Print Network [OSTI]

Melting of Iron under Earth's Core Conditions from Diffusion Monte Carlo Free Energy Calculations Ester Sola1 and Dario Alfe`1,2 1 Thomas Young Centre@UCL, and Department of Earth Sciences, UCL, Gower. Here we used quantum Monte Carlo techniques to compute the free energies of solid and liquid iron

Alfè, Dario

380

Competitive adsorption effects in the electrodeposition of iron-nickel alloys  

SciTech Connect (OSTI)

Two-step reaction mechanisms involving adsorbed monovalent intermediate ions for the electrodeposition of iron and nickel as single metals can be combined to form a predictive model for the codeposition of iron-nickel alloys. Inhibition of the more noble nickel in the presence of iron is caused by preferential surface coverage of the adsorbed iron intermediate resulting from a difference between the two elements in Tafel constant for the electrosorption step. The role of hydrolyzed cations and surface pH is investigated and methods for evaluating the influence of pH are explored. The analysis shows that changes in surface pH with potential are not necessary for iron-rich (anomalous) deposits, but that variations in pH from one electrolyte to another may influence deposit composition. The tendency toward iron-rich deposits with increasing overpotential exists in all systems, however, and can be prevented only by decreasing the iron concentration of the bath. An extension of the analysis to account for transport limitations in baths with low iron concentration is developed and calculations with the model are presented to illustrate the effects of current density and electrolyte convection under conditions similar to those investigated experimentally in the literature.

Matlosz, M. (Ecole Polytechnique Federale de Lausanne, (Switzerland). Dept. des materiaux)

1993-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

The superconducting properties of two classes of iron-based materials have been studied in  

E-Print Network [OSTI]

The superconducting properties of two classes of iron-based materials have been studied in high Jc define the applications limit of any superconductor. We found that Tc and Hc2 of Ba1-xKxFe2As2 can. 98, 042509 (2011) High field performances in iron-based superconductors Gregory S. Boebinger

Weston, Ken

382

Interconnection of nitrogen fixers and iron in the Pacific Ocean: Theory and numerical simulations  

E-Print Network [OSTI]

Interconnection of nitrogen fixers and iron in the Pacific Ocean: Theory and numerical simulations, F. Monteiro, and M. J. Follows (2012), Interconnection of nitrogen fixers and iron in the Pacific interconnected. Microbial community structure is shaped by the variable physical, chemical and predatory

383

A soil bacterium regulates plant acquisition of iron via deficiency-inducible mechanisms  

E-Print Network [OSTI]

A soil bacterium regulates plant acquisition of iron via deficiency-inducible mechanisms Huiming in most soils. While certain soil microbes produce chelating agents that enhance the solubility of iron understanding that select soil microbes play a signaling role in activating growth and stress responses

Paré, Paul W.

384

Dissociation of Import of the Rieske Iron-Sulfur Protein into Saccharomyces cerevisiae Mitochondria from Proteolytic  

E-Print Network [OSTI]

processing peptidase was investigated using high concentrations of metal chelators and iron-sulfur protein- sulfur protein into the mitochondrial matrix is inde- pendent of proteolytic processing first removes a 22-amino acid peptide from the prese- quence of the precursor iron-sulfur protein (p

Trumpower, Bernard L.

385

Spectral induced polarization and electrodic potential monitoring of microbially mediated iron sulfide transformations  

SciTech Connect (OSTI)

Stimulated sulfate-reduction is a bioremediation technique utilized for the sequestration of heavy metals in the subsurface.We performed laboratory column experiments to investigate the geoelectrical response of iron sulfide transformations by Desulfo vibriovulgaris. Two geoelectrical methods, (1) spectral induced polarization (SIP), and (2) electrodic potential measurements, were investigated. Aqueous geochemistry (sulfate, lactate, sulfide, and acetate), observations of precipitates (identified from electron microscopy as iron sulfide), and electrodic potentials on bisulfide ion (HS) sensitive silver-silver chloride (Ag-AgCl) electrodes (630 mV) were diagnostic of induced transitions between an aerobic iron sulfide forming conditions and aerobic conditions promoting iron sulfide dissolution. The SIP data showed 10m rad anomalies during iron sulfide mineralization accompanying microbial activity under an anaerobic transition. These anomalies disappeared during iron sulfide dissolution under the subsequent aerobic transition. SIP model parameters based on a Cole-Cole relaxation model of the polarization at the mineral-fluid interface were converted to (1) estimated biomineral surface area to pore volume (Sp), and (2) an equivalent polarizable sphere diameter (d) controlling the relaxation time. The temporal variation in these model parameters is consistent with filling and emptying of pores by iron sulfide biofilms, as the system transitions between anaerobic (pore filling) and aerobic (pore emptying) conditions. The results suggest that combined SIP and electrodic potential measurements might be used to monitor spatiotemporal variability in microbial iron sulfide transformations in the field.

Hubbard, Susan; Personna, Y.R.; Ntarlagiannis, D.; Slater, L.; Yee, N.; O'Brien, M.; Hubbard, S.

2008-02-15T23:59:59.000Z

386

Towards improved iron-based catalysts for direct coal liquefaction  

SciTech Connect (OSTI)

Iron-based catalysts for direct coal liquefaction (DCL) have several advantages: they are cheap and environmentally benign, and have a reasonable activity in the sulfide form. Work in this area has recently been collected and published. work in our laboratory has focussed on catalysts made with ferric sulfide as a precursor. This material is unstable even at room temperature, and disproportionates to form pyrite (FeS{sub x}; PY) , non-stoichiometric pyrrhotite (FeS{sub x}, x {approx} 1; PH) , and elemental S. The value of x and the relative amounts of PY and PH depend upon the time and temperature of disproportionation. Materials from hydrothermal disproportionation at 200{degrees}C for 1 h have roughly equal amounts of PH and PY (on an iron basis), and these materials appear to make the most active and selective catalysts for DCL. These catalyst precursors and catalyst materials have been characterized by atomic adsorption spectroscopy (AA), Auger electron spectroscopy (AES) and x-ray diffraction (XRD). The characterizations have been correlated to the reactions of Fe during disproportionation and to the performance of the catalysts. Improvements in these catalysts can be made in two ways: by altering the active sites, and by decreasing the particle sizes. In the present work, we present examples of both types. The active sites are altered by using small amounts of a second metal. The particle sizes are reduced by using an aerosol technique for preparation.

Dadyburjor, D.B.; Stiller, A.H.; Stinespring, C.D. [West Virginia Univ., Morgantown, WV (United States)] [and others

1994-12-31T23:59:59.000Z

387

Mechanical properties of thin-wall ductile iron  

SciTech Connect (OSTI)

The use of cast iron in automotive applications in this era of increasing fuel efficiency requires the ability to cast very thin sections (2-7 mm). Although thin-wall iron castings have been produced, difficulty arises in predicting the mechanical properties of these castings because mechanical behavior is closely related to thickness, which in turn is a direct consequence of the section cooling rate. Experiments relating casting thickness with ultimate tensile strength, elongation, reduction in area, and hardness were performed. An inverse relationship was found between ultimate tensile strength and thickness. Elongation was found to depend only on the thickness of the sample and approached zero as the thickness of the sample decreased below 1.5 mm. Percent reduction in area was found to depend linearly on thickness. Although average hardness also correlated with the inverse of thickness, it was not found to be a useful measure of ultimate tensile strength. The results of this study show that cooling rate of the thin wall casting very much affects the mechanical properties.

Schrems, Karol K.; Dogan, Omer N.; Hawk, Jeffrey A.; Druschitz, A.P. (Intermet Corp., Lynchburg, VA)

2000-10-01T23:59:59.000Z

388

Sublattice Magnetic Relaxation in Rare Earth Iron Garnets  

SciTech Connect (OSTI)

The magnetic properties of rare earth garnets make them attractive materials for applications ranging from optical communications to magnetic refrigeration. The purpose of this research was to determine the AC magnetic properties of several rare earth garnets, in order to ascertain the contributions of various sublattices. Gd3Fe5O¬12, Gd3Ga5O12, Tb3Fe5O12, Tb3Ga5O12, and Y3Fe5O12 were synthesized by a solid state reaction of their oxides and verified by x-ray diffraction. Frequency-dependent AC susceptibility and DC magnetization were measured versus temperature (10 – 340 K). Field cooling had little effect on AC susceptibility, but large effect on DC magnetization, increasing magnetization at the lowest temperature and shifting the compensation point to lower temperatures. Data suggest that interaction of the two iron lattices results in the two frequency dependent magnetic relaxations in the iron garnets, which were fit using the Vogel-Fulcher and Arrhenius laws.

McCloy, John S.; Walsh, Brian

2013-07-08T23:59:59.000Z

389

Mixed polyanion glass cathodes: Iron phosphate vanadate glasses  

SciTech Connect (OSTI)

Mixed polyanion (MP) glasses have been investigated for use as cathodes in lithium ion batteries. MP glass cathodes are similar in composition to theoretically promising crystalline polyanionic (CP) cathodes (e.g., lithium cobalt phosphate, lithium manganese silicate), but with proper polyanion substitution, they can be designed to overcome the key shortcomings of CP cathodes, such as poor electrical conductivity and irreversible phase changes. Iron phosphate/vanadate glasses were chosen as a first demonstration of the MP glass concept. Polyanion substitution with vanadate was shown to improve the intercalation capacity of an iron phosphate glass from almost zero to full theoretical capacity. In addition, the MP glass cathodes also exhibited an unexpected second high-capacity electrochemical reaction. X-ray absorption near-edge structure (XANES) and x-ray diffraction (XRD) of cathodes from cells having different states of charge suggested that this second electrochemical reaction is a glass-state conversion reaction. With a first demonstration established, MP glass materials utilizing an intercalation and/or glass-state conversion reaction are promising candidates for future high-energy cathode research.

Kercher, Andrew K [ORNL; Ramey, Joanne Oxendine [ORNL; Carroll, Kyler J [Massachusetts Institute of Technology (MIT); Kiggans Jr, James O [ORNL; Veith, Gabriel M [ORNL; Meisner, Roberta [Oak Ridge National Laboratory (ORNL); Boatner, Lynn A [ORNL; Dudney, Nancy J [ORNL

2014-01-01T23:59:59.000Z

390

PHASE II CALDERON PROCESS TO PRODUCE DIRECT REDUCED IRON RESEARCH AND DEVELOPMENT PROJECT  

SciTech Connect (OSTI)

This project was initially targeted to the making of coke for blast furnaces by using proprietary technology of Calderon in a phased approach, and Phase I was successfully completed. The project was then re-directed to the making of iron units. In 2000, U.S. Steel teamed up with Calderon for a joint effort which will last 42 months to produce directly reduced iron with the potential of converting it into molten iron or steel consistent with the Roadmap recommendations of 1998 prepared by the Steel Industry in cooperation with the Department of Energy by using iron ore concentrate and coal as raw materials, both materials being appreciably lower in cost than using iron pellets and coke.

Albert Calderon; Reina Calderon

2004-01-27T23:59:59.000Z

391

PHASE II CALDERON PROCESS TO PRODUCE DIRECT REDUCED IRON RESEARCH AND DEVELOPMENT PROJECT  

SciTech Connect (OSTI)

This project was initially targeted to the making of coke for blast furnaces by using proprietary technology of Calderon in a phased approach, and Phase I was successfully completed. The project was then re-directed to the making of iron units. In 2000, U.S. Steel teamed up with Calderon for a joint effort which will last 42 months to produce directly reduced iron with the potential of converting it into molten iron or steel consistent with the Roadmap recommendations of 1998 prepared by the Steel Industry in cooperation with the Department of Energy by using iron ore concentrate and coal as raw materials, both materials being appreciably lower in cost than using iron pellets and coke.

Albert Calderon

2004-10-28T23:59:59.000Z

392

A study of kinetics and mechanisms of iron ore reduction in ore/coal composites  

SciTech Connect (OSTI)

Blast furnace ironmaking technology, by far the most important ironmaking process, is based on coke and iron ore pellets (or sinter) to produce liquid iron. However, there has been a worldwide effort searching for a more economical and environmental friendly alternative process for the production of liquid iron. The essential requirement is that it should be minimized in the usage of metallurgical coke and agglomerate of iron ore concentrates. With iron ore concentrate and coal as raw materials, there are two approaches: (a) Smelting reduction; melting the ore before reduction; (b) Reduction of the ore in solid state followed by melting. The present work is on the fundamentals of the latter. It consists of a better designed experimental study including pressure gradient measurement, and a more rigorous non-isothermal and non-isobaric mathematical model. Results of this work may be applied to carbothermic processes, such as FASTMET and LB processes, as well as recycling of fines in steel plants.

Sun, S.; Lu, W.K. [McMaster Univ., Hamilton, Ontario (Canada). Dept. of Materials Science and Engineering

1996-12-31T23:59:59.000Z

393

X-ray absorption spectroscopic studies of mononuclear non-heme iron enzymes  

SciTech Connect (OSTI)

Fe-K-edge X-ray absorption spectroscopy (XAS) has been used to investigate the electronic and geometric structure of the iron active site in non-heme iron enzymes. A new theoretical extended X-ray absorption fine structure (EXAFS) analysis approach, called GNXAS, has been tested on data for iron model complexes to evaluate the utility and reliability of this new technique, especially with respect to the effects of multiple-scattering. In addition, a detailed analysis of the 1s{yields}3d pre-edge feature has been developed as a tool for investigating the oxidation state, spin state, and geometry of iron sites. Edge and EXAFS analyses have then been applied to the study of non-heme iron enzyme active sites.

Westre, T.E.

1996-01-01T23:59:59.000Z

394

PHASE II CALDERON PROCESS TO PRODUCE DIRECT REDUCED IRON RESEARCH AND DEVELOPMENT PROJECT  

SciTech Connect (OSTI)

This project was initially targeted to the making of coke for blast furnaces by using proprietary technology of Calderon in a phased approach, and Phase I was successfully completed. The project was then re-directed to the making of iron units. In 2000, U.S. Steel teamed up with Calderon for a joint effort to produce directly reduced iron with the potential of converting it into molten iron or steel consistent with the Roadmap recommendations of 1998 prepared by the Steel Industry in cooperation with the Department of Energy by using iron ore concentrate and coal as raw materials, both materials being appreciably lower in cost than using iron pellets, briquettes, sinter and coke.

Albert Calderon

2006-04-19T23:59:59.000Z

395

A Long, Contingent Path to Comparative Advantage: Industrial Policy and the Japanese Iron and Steel Industry, 1900-1973  

E-Print Network [OSTI]

Overseas Procurement of Coking Coal By the Japanese Steelendowed as Japan in coking coal and iron ore (Yonekura,

ELBAUM, BERNARD

2006-01-01T23:59:59.000Z

396

Real-time x-ray absorption spectroscopy of uranium, iron, and manganese in contaminated sediments during bioreduction  

E-Print Network [OSTI]

ferric iron in aquatic sediments. Applied and Environmentalin evaporation basin sediments. Geochimica Cosmochimica Actaof uranium-contaminated subsurface sediments. Environmental

Tokunaga, T.K.

2008-01-01T23:59:59.000Z

397

Interplay of superconductivity, magnetism, and density waves in rare-earth tritellurides and iron-based superconducting materials  

E-Print Network [OSTI]

B. Superconductivity . . . . . . . . . . . . . . . . .IV Superconductivity and Magnetism in Iron-PnictideSearch for Pressure Induced Superconductivity in Undoped Ce-

Zocco, Diego Andrés

2011-01-01T23:59:59.000Z

398

Assessment of Energy Efficiency Improvement and CO2 Emission Reduction Potentials in the Iron and Steel Industry in China  

E-Print Network [OSTI]

Improvement and CO2 Emission Reduction Potentials in theElectricity Saving and CO2 Emission Reduction in the Iron

Hasanbeigi, Ali

2013-01-01T23:59:59.000Z

399

Synchrotron-based investigations of the nature and impact of iron contamination in multicrystalline silicon solar cells  

E-Print Network [OSTI]

particles, either oxidized and/or present with multiple other metal species reminiscent of stainless steels equipment, or feedstock, and b the more numerous, homogeneously distributed, and smaller iron silicide involving atomically dissolved iron in the melt or in the crystal. It was found that iron silicide

400

Manipulation of in vivo iron levels can alter resistance to oxidative stress without affecting ageing in the nematode C. elegans  

E-Print Network [OSTI]

by reactive oxygen species (ROS) (Harman, 1956; Sohal and Weindruch, 1996). Thus, far, extensive experimental.2. Iron as a generator of oxidative damage Iron plays a central role in many essential cellular processes including oxygen transport, xenobiotic detoxification, and mito- chondrial energy metabolism. Iron

Gems, David

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Chem.Mater. 1996,7, 1419-1421 1419 Encapsulation of Iron Carbide in Carbon Nanocapsules  

E-Print Network [OSTI]

Chem.Mater. 1996,7, 1419-1421 1419 Encapsulation of Iron Carbide in Carbon Nanocapsules Nikolai S Manuscript Received April 24, 1995@ Whiskers of iron carbide encased in carbon shells have been prepared from microscopy. The iron carbide whiskers range in length from 300 to 500 nm, and their widths are approximately

Wang, Zhong L.

402

PGRL1 Participates in Iron-induced Remodeling of the Photosynthetic Apparatus and in Energy Metabolism in  

E-Print Network [OSTI]

PGRL1 Participates in Iron-induced Remodeling of the Photosynthetic Apparatus and in Energy- ciency symptoms at higher iron concentrations than wild-type cells, although the cells are not more depleted in cellular iron relative to wild-type cells as measured by mass spectrometry. Thiol

403

Thermal treatment wall  

DOE Patents [OSTI]

A thermal treatment wall emplaced to perform in-situ destruction of contaminants in groundwater. Thermal destruction of specific contaminants occurs by hydrous pyrolysis/oxidation at temperatures achievable by existing thermal remediation techniques (electrical heating or steam injection) in the presence of oxygen or soil mineral oxidants, such as MnO.sub.2. The thermal treatment wall can be installed in a variety of configurations depending on the specific objectives, and can be used for groundwater cleanup, wherein in-situ destruction of contaminants is carried out rather than extracting contaminated fluids to the surface, where they are to be cleaned. In addition, the thermal treatment wall can be used for both plume interdiction and near-wellhead in-situ groundwater treatment. Thus, this technique can be utilized for a variety of groundwater contamination problems.

Aines, Roger D. (Livermore, CA); Newmark, Robin L. (Livermore, CA); Knauss, Kevin G. (Livermore, CA)

2000-01-01T23:59:59.000Z

404

Medical Actinium Therapeutic Treatment  

ScienceCinema (OSTI)

Learn how INL researchers are increasing world supplies of Bismuth 213 to help with cancer treatments. For more information about INL research projects, visit http://www.facebook.com/idahonationallaboratory.

None

2013-05-28T23:59:59.000Z

405

Portable treatment systems study  

SciTech Connect (OSTI)

In developing their Site Treatment Plans (STPs), many of the Department of Energy installations identified some form of portable treatment, to facilitate compliant disposition of select mixed low-level wastestreams. The Environmental Management Office of Science and Technology requested that a systems study be performed to better define the potential role of portable treatment with respect to mixed low-level waste, highlight obstacles to implementation, and identify opportunities for future research and development emphasis. The study was performed by first establishing a representative set of mixed waste, then formulating portable treatment system concepts to meet the required processing needs for these wastes. The portable systems that were conceptualized were evaluated and compared to a fixed centralized treatment alternative. The system evaluations include a life-cycle cost analysis and an assessment of regulatory, institutional, and technical issues associated with the potential use of portable systems. The results of this study show that when all costs are included, there are no significant cost differences between portable systems and fixed systems. However, it is also emphasized that many uncertainties exist that could impact the cost of implementing portable treatment systems. Portable treatment could be made more attractive through private sector implementation, although there is little economic incentive for a commercial vendor to develop small, specialized treatment capabilities with limited applicability. Alternatively, there may also be valid reasons why fixed units cannot be used for some problematic wastestreams. In any event, there are some site-specific problems that still need to be addressed, and there may be some opportunity for research and development to make a positive impact in these areas.

Sherick, M.J.; Schwinkendorf, W.E.; Bechtold, T.E.; Cole, L.T.

1997-03-01T23:59:59.000Z

406

Vitrification and solidification remedial treatment and disposal costs  

SciTech Connect (OSTI)

Solidification (making concrete) and vitrification (making glass) are frequently the treatment methods recommended for treating inorganic or radioactive wastes. Solidification is generally perceived as the most economical treatment method. Whereas, vitrification is considered (by many) as the most effective of all treatment methods. Unfortunately, vitrification has acquired the stigma that it is too expensive to receive further consideration as an alternative to solidification in high volume treatment applications. Ironically, economic studies, as presented in this paper, show that vitrification may be more competitive in some high volume applications. Ex-situ solidification and vitrification are the competing methods for treating in excess of 450,000 m{sup 3} of low-level radioactive and mixed waste at the Fernald Environmental Management Project (FEMP or simply, Fernald) located near Cincinnati, Ohio. This paper summarizes a detailed study done to: compare the economics of the solidification and vitrification processes, determine if the stigma assigned to vitrification is warranted and, determine if investing millions of dollars into vitrification development, along with solidification development, at the Fernald is warranted.

Gimpel, R.F.

1992-03-12T23:59:59.000Z

407

Energy and materials flows in the iron and steel industry  

SciTech Connect (OSTI)

Past energy-consumption trends and future energy-conservation opportunities are investigated for the nation's iron and steel industry. It is estimated that, in 1980, the industry directly consumed approximately 2.46 x 10/sup 15/ Btu of energy (roughly 3% of total US energy consumption) to produce 111 million tons of raw steel and to ship 84 million tons of steel products. Direct plus indirect consumption is estimated to be about 3.1 x 10/sup 15/ Btu. Of the set of conservation technologies identified, most are judged to be ready for commercialization if and when the industry's capital formation and profitability problems are solved and the gradual predicted increase in energy prices reduces the payback periods to acceptable levels.

Sparrow, F.T.

1983-06-01T23:59:59.000Z

408

Organic binders for iron ore pelletization and steelmaking  

SciTech Connect (OSTI)

Historically, bentonite has been used in the agglomeration process in North American iron ore plants. In 1986, Eveleth Mines replaced bentonite with Peridur, a carboxy methyl cellulose organic binder used in conjunction with 1% limestone. Since May of 1993, Allied Colloids` Alcotac FE8 has been used by Eveleth as the replacement for bentonite. This paper discusses the performance benefits obtained when bentonite was replaced with an organic binder. These totally synthetic binders are used in conjunction with limestone. The benefits of organic binders are: improved metallurgical parameters of the fired pellet, especially the reducibility, which results in more efficient use of gases in the blast furnace; reduced silica in the pellet, in the case of Eveleth Mines this was a reduction of 0.5%, a lower silica pellet reduces slag in the blast furnace; increased production in both the agglomeration/induration and steelmaking processes; and a decrease in coke consumption.

Karkoska, D.; Sankey, E. [Allied Colloids, Suffolk, VA (United States); Anderson, R. [Eveleth Mines, MN (United States)

1995-12-01T23:59:59.000Z

409

Complexation effects in the electrodeposition of nickel-iron alloys  

SciTech Connect (OSTI)

The nickel-iron alloy electrodeposition system exhibits a phenomenon known as anomalous codeposition, where the less noble metal (Fe) deposits preferentially to the more noble metal (Ni). One explanation for this behavior is that ferrous hydroxide adsorbs to the surface of the electrode and inhibits the electrodeposition of the nickel. This mechanism is being tested through the use of {open_quotes}selective{close_quotes} complexing agents for Ni{sup 2+}, Fe{sup 2+} and Fe{sup 3+}. The complexation behavior of these ions with acetate, chloroacetate,and aminoacetate ions is being characterized by potentiometric titration and polarographic measurements. The effect of these complexants on the electrodeposition of the alloys is also being studied.

Huynh, T.; Harris, T. [Univ. of Tulsa, OK (United States)

1995-12-01T23:59:59.000Z

410

Strong nonlinear current–voltage behaviour in iron oxyborate  

SciTech Connect (OSTI)

Strong nonlinear resistance has been found in the charge ordered ferroelectric iron oxyborate (Fe{sub 2}OBO{sub 3}) with a high dielectric constant and giant converse magnetoelectric effect. In low temperature range the I-V nonlinearity increases quickly with decreasing temperature. Transport measurements on polycrystalline and single crystal Fe{sub 2}OBO{sub 3} indicate that the nonlinearity is not induced by grain boundaries. The nonlinear I-V behavior is intrinsically correlated with the charge order phase melting in Fe{sub 2}OBO{sub 3} by detailed in-situ TEM investigations. These results provide an insight into structure-activity relationship of resistance switching effects at atomic and electric scales, which is essential for its potential application as varistors and storage media.

Song, Yuanjun [Department of Physics, Beihang University, Beijing 100191 (China); Xu, Yingying; Song, Yujun [School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083 (China); Li, Jianqi [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Wang, Rongming, E-mail: rmwang@buaa.edu.cn [Department of Physics, Beihang University, Beijing 100191 (China); School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083 (China)

2014-11-15T23:59:59.000Z

411

Ferromagnetic resonance of sputtered yttrium iron garnet nanometer films  

SciTech Connect (OSTI)

Growth of nm-thick yttrium iron garnet (YIG) films by sputtering and ferromagnetic resonance (FMR) properties in the films were studied. The FMR linewidth of the YIG film decreased as the film thickness was increased from several nanometers to about 100?nm. For films with very smooth surfaces, the linewidth increased linearly with frequency. In contrast, for films with big grains on the surface, the linewidth-frequency response was strongly nonlinear. Films in the 7–26?nm thickness range showed a surface roughness between 0.1?nm and 0.4?nm, a 9.48-GHz FMR linewidth in the 6–10?Oe range, and a damping constant of about 0.001.

Liu, Tao [Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States); State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China); Chang, Houchen; Sun, Yiyan; Kabatek, Michael; Wu, Mingzhong, E-mail: mwu@lamar.colostate.edu [Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States); Vlaminck, Vincent; Hoffmann, Axel [Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Deng, Longjiang [State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China)

2014-05-07T23:59:59.000Z

412

Arsenic remediation of drinking water using iron-oxide coated coal bottom ash  

SciTech Connect (OSTI)

We describe laboratory and field results of a novel arsenic removal adsorbent called 'Arsenic Removal Using Bottom Ash' (ARUBA). ARUBA is prepared by coating particles of coal bottom ash, a waste material from coal fired power plants, with iron (hydr)oxide. The coating process is simple and conducted at room temperature and atmospheric pressure. Material costs for ARUBA are estimated to be low (~;;$0.08 per kg) and arsenic remediation with ARUBA has the potential to be affordable to resource-constrained communities. ARUBA is used for removing arsenic via a dispersal-and-removal process, and we envision that ARUBA would be used in community-scale water treatment centers. We show that ARUBA is able to reduce arsenic concentrations in contaminated Bangladesh groundwater to below the Bangladesh standard of 50 ppb. Using the Langmuir isotherm (R2 = 0.77) ARUBA's adsorption capacity in treating real groundwater is 2.6x10-6 mol/g (0.20 mg/g). Time-to-90percent (defined as the time interval for ARUBA to remove 90percent of the total amount of arsenic that is removed at equilibrium) is less than one hour. Reaction rates (pseudo-second-order kinetic model, R2>_ 0.99) increase from 2.4x105 to 7.2x105 g mol-1 min-1 as the groundwater arsenic concentration decreases from 560 to 170 ppb. We show that ARUBA's arsenic adsorption density (AAD), defined as the milligrams of arsenic removed at equilibrium per gram of ARUBA added, is linearly dependent on the initial arsenic concentration of the groundwater sample, for initial arsenic concentrations of up to 1600 ppb and an ARUBA dose of 4.0 g/L. This makes it easy to determine the amount of ARUBA required to treat a groundwater source when its arsenic concentration is known and less than 1600 ppb. Storing contaminated groundwater for two to three days before treatment is seen to significantly increase ARUBA's AAD. ARUBA can be separated from treated water by coagulation and clarification, which is expected to be less expensive than filtration of micron-scale particles, further contributing to the affordability of a community-scale water treatment center.

MATHIEU, JOHANNA L.; GADGIL, ASHOK J.; ADDY, SUSAN E.A.; KOWOLIK, KRISTIN

2010-06-01T23:59:59.000Z

413

Wintertime pytoplankton bloom in the Subarctic Pacific supportedby continental margin iron  

SciTech Connect (OSTI)

Heightened biological activity was observed in February 1996in the high-nutrient low-chlorophyll (HNLC) subarctic North PacificOcean, a region that is thought to beiron-limited. Here we provideevidence supporting the hypothesis that Ocean Station Papa (OSP) in thesubarctic Pacific received a lateral supply of particulate iron from thecontinental margin off the Aleutian Islands in the winter, coincidentwith the observed biological bloom. Synchrotron X-ray analysis was usedto describe the physical form, chemistry, and depth distributions of ironin size fractionated particulate matter samples. The analysis revealsthat discrete micron-sized iron-rich hotspots are ubiquitous in the upper200m at OSP, more than 900km from the closest coast. The specifics of thechemistry and depth profiles of the Fe hot spots trace them to thecontinental margins. We thus hypothesize that iron hotspots are a markerfor the delivery of iron from the continental margin. We confirm thedelivery of continental margin iron to the open ocean using an oceangeneral circulation model with an iron-like tracer source at thecontinental margin. We suggest that iron from the continental marginstimulated a wintertime phytoplankton bloom, partially relieving the HNLCcondition.

Lam, Phoebe J.; Bishop, James K.B.; Henning, Cara C.; Marcus,Matthew A.; Waychunas, Glenn A.; Fung, Inez

2004-06-08T23:59:59.000Z

414

Energy Saving Melting and Revert Reduction Technology: Aging of Graphitic Cast Irons and Machinability  

SciTech Connect (OSTI)

The objective of this task was to determine whether ductile iron and compacted graphite iron exhibit age strengthening to a statistically significant extent. Further, this effort identified the mechanism by which gray iron age strengthens and the mechanism by which age-strengthening improves the machinability of gray cast iron. These results were then used to determine whether age strengthening improves the machinability of ductile iron and compacted graphite iron alloys in order to develop a predictive model of alloy factor effects on age strengthening. The results of this work will lead to reduced section sizes, and corresponding weight and energy savings. Improved machinability will reduce scrap and enhance casting marketability. Technical Conclusions: ���¢�������¢ Age strengthening was demonstrated to occur in gray iron ductile iron and compacted graphite iron. ���¢�������¢ Machinability was demonstrated to be improved by age strengthening when free ferrite was present in the microstructure, but not in a fully pearlitic microstructure. ���¢�������¢ Age strengthening only occurs when there is residual nitrogen in solid solution in the Ferrite, whether the ferrite is free ferrite or the ferrite lamellae within pearlite. ���¢�������¢ Age strengthening can be accelerated by Mn at about 0.5% in excess of the Mn/S balance Estimated energy savings over ten years is 13.05 trillion BTU, based primarily on yield improvement and size reduction of castings for equivalent service. Also it is estimated that the heavy truck end use of lighter castings for equivalent service requirement will result in a diesel fuel energy savings of 131 trillion BTU over ten years.

Von L. Richards

2012-09-19T23:59:59.000Z

415

PHASE II CALDERON PROCESS TO PRODUCE DIRECT REDUCED IRON RESEARCH AND DEVELOPMENT PROJECT  

SciTech Connect (OSTI)

This project was initially targeted to the making of coke for blast furnaces by using proprietary technology of Calderon in a phased approach, and Phase I was successfully completed. The project was then re-directed to the making of iron units. U.S. Steel teamed up with Calderon for a joint effort which will last 30 months to produce directly reduced iron with the potential of converting it into molten iron or steel consistent with the Roadmap recommendations of 1998 prepared by the Steel Industry in cooperation with the Department of Energy.

Albert Calderon

2002-07-30T23:59:59.000Z

416

PHASE II CALDERON PROCESS TO PRODUCE DIRECT REDUCED IRON RESEARCH AND DEVELOPMENT PROJECT  

SciTech Connect (OSTI)

This project was initially targeted to the making of coke for blast furnaces by using proprietary technology of Calderon in a phased approach, and Phase I was successfully completed. The project was then re-directed to the making of iron units. U.S. Steel teamed up with Calderon for a joint effort which will last 30 months to produce directly reduced iron with the potential of converting it into molten iron or steel consistent with the Roadmap recommendations of 1998 prepared by the Steel Industry in cooperation with the Department of Energy.

Albert Calderon

2003-04-28T23:59:59.000Z

417

Spatial and Geochemical Spatial and Geochemical Heterogeneity Impacts on Iron Biomineralization and Uranium Sequestration  

SciTech Connect (OSTI)

Bioreductive transformations of iron (hydr)oxides are a critically important processes controlling the fate and transport of contaminants in soil and aquifer systems. Heterogeneity arising from both chemical and physical conditions will lead to various biomineralization products of iron oxides and will additionally alter reactions controlling the partitioning of hazardous elements such as uranium. We are presently exploring chemical and mineralogical transformations within physically complex material having a range of pore-size distribution and chemical environments. Here we discuss the impact of calcium on the reactive transport of uranium and the spatial heterogeneity in iron hydroxide mineralization and concomitant uranium reduction along a diffusive flow path.

Scott Fendorf; Shawn Benner; Jim Neiss; Colleen Hansel; Peter Nico; Chris Francis; Phil Jardine

2004-03-17T23:59:59.000Z

418

Computational study: Reduction of iron corrosion in lead coolant of fast nuclear reactor  

SciTech Connect (OSTI)

In this paper we report molecular dynamics simulation results of iron (cladding) corrosion in interaction with lead coolant of fast nuclear reactor. The goal of this work is to study effect of oxygen injection to the coolant to reduce iron corrosion. By evaluating diffusion coefficients, radial distribution functions, mean-square displacement curves and observation of crystal structure of iron before and after oxygen injection, we concluded that a significant reduction of corrosion can be achieved by issuing about 2% of oxygen atoms into lead coolant.

Arkundato, Artoto; Su'ud, Zaki; Abdullah, Mikrajuddin; Widayani [Physics Department, ITB, Bandung (Indonesia) and Physics Department, University of Jember, Jl. Kalimantan III/25, Jember (Indonesia); Physics Department, ITB Jl. Ganesha 10, Bandung (Indonesia)

2012-06-20T23:59:59.000Z

419

Atomic, electronic and magnetic structure of graphene/iron and nickel interfaces: theory and experiment  

E-Print Network [OSTI]

First-principles calculations of the effect of carbon coverage on the atomic, electronic and magnetic structure of nickel and iron substrates demonstrate insignificant changes in the interatomic distances and magnetic moments on the atoms of the metallic substrates. The coverage of the iron surface by mono- and few-layer graphene induces significant changes in the orbital occupancies and exchange interactions between the layers in contrast to the case of a nickel substrate for which changes in the orbital ordering and exchange interactions are much smaller. Experimental measurements demonstrate the presence of ferromagnetic fcc-iron in Fe@C nanoparticles and the superparamagnetic behavior of Ni@C nanoparticles.

Boukhvalov, D W; Uimin, M A; Korolev, A V; Yermakov, A Ye

2014-01-01T23:59:59.000Z

420

Decaking of coal or oil shale during pyrolysis in the presence of iron oxides  

DOE Patents [OSTI]

A method for producing a fuel from the pyrolysis of coal or oil shale in the presence of iron oxide in an inert gas atmosphere is described. The method includes the steps of pulverizing feed coal or oil shale, pulverizing iron oxide, mixing the pulverized feed and iron oxide, and heating the mixture in a gas atmosphere which is substantially inert to the mixture so as to form a product fuel, which may be gaseous, liquid and/or solid. The method of the invention reduces the swelling of coals, such as bituminous coal and the like, which are otherwise known to swell during pyrolysis. 4 figs., 8 tabs.

Rashid Khan, M.

1988-05-05T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Decaking of coal or oil shale during pyrolysis in the presence of iron oxides  

DOE Patents [OSTI]

A method for producing a fuel from the pyrolysis of coal or oil shale in the presence of iron oxide in an inert gas atmosphere. The method includes the steps of pulverizing feed coal or oil shale, pulverizing iron oxide, mixing the pulverized feed and iron oxide, and heating the mixture in a gas atmosphere which is substantially inert to the mixture so as to form a product fuel, which may be gaseous, liquid and/or solid. The method of the invention reduces the swelling of coals, such as bituminous coal and the like, which are otherwise known to swell during pyrolysis.

Khan, M. Rashid (Morgantown, WV)

1989-01-01T23:59:59.000Z

422

PHASE II CALDERON PROCESS TO PRODUCE DIRECT REDUCED IRON RESEARCH AND DEVELOPMENT PROJECT  

SciTech Connect (OSTI)

This project was initially targeted to the making of coke for blast furnaces by using proprietary technology of Calderon in a phased approach, and Phase I was successfully completed. The project was then re-directed to the making of iron units. U.S. Steel teamed up with Calderon for a joint effort which will last 30 months to produce directly reduced iron with the potential of converting it into molten iron or steel consistent with the Roadmap recommendations of 1998 prepared by the Steel Industry in cooperation with the Department of Energy.

Albert Calderon

2003-01-28T23:59:59.000Z

423

Summary of INEL research on the iron-enriched basalt waste form  

SciTech Connect (OSTI)

This report summarizes the knowledge base on the iron-enriched basalt (IEB) waste form developed at the Idaho National Engineering Laboratory (INEL) during 1979--1982. The results presented discuss the applicability of IEB in converting retrieved transuranic (TRU) waste from INEL`s Radioactive Waste Management Complex (RWMC) into a vitreous/ceramic (glassy/rock) stable waste form suitable for permanent disposal in an appropriate repository, such as the Waste Isolation Pilot Plant (WIPP) in New Mexico. Borosilicate glass (BSG), the approved high-level waste form, appears unsuited for this application. Melting the average waste-soil mix from the RWMC produces the IEB composition and attempting to convert IEB to the BSG composition would require additions of substantial B{sub 2}0{sub 3}, Na, and SiO{sub 2} (glass frit). IEB requires processing temperatures of 1400 to 1600{degrees}C, depending upon the waste composition. Production of the IEB waste form, using Joule heated melters, has proved difficult in the past because of electrode and refractory corrosion problems associated with the high temperature melts. Higher temperature electric melters (arc and plasma) are available to produce this final waste form. Past research focused on extensive slag property measurements, waste form leachability tests, mechanical, composition, and microstructure evaluations, as well as a host of experiments to improve production of the waste form. Past INEL studies indicated that the IEB glass-ceramic is a material that will accommodate and stabilize a wide range of heterogeneous waste materials, including long lived radionuclides and scrap metals, while maintaining a superior level of chemical and physical performance characteristics. Controlled cooling of the molten IEB and subsequent heat treatment will produce a glass-ceramic waste form with superior leach resistance.

Reimann, G.A.; Grandy, J.D.; Eddy, T.L.; Anderson, G.L.

1992-01-01T23:59:59.000Z

424

Summary of INEL research on the iron-enriched basalt waste form  

SciTech Connect (OSTI)

This report summarizes the knowledge base on the iron-enriched basalt (IEB) waste form developed at the Idaho National Engineering Laboratory (INEL) during 1979--1982. The results presented discuss the applicability of IEB in converting retrieved transuranic (TRU) waste from INEL's Radioactive Waste Management Complex (RWMC) into a vitreous/ceramic (glassy/rock) stable waste form suitable for permanent disposal in an appropriate repository, such as the Waste Isolation Pilot Plant (WIPP) in New Mexico. Borosilicate glass (BSG), the approved high-level waste form, appears unsuited for this application. Melting the average waste-soil mix from the RWMC produces the IEB composition and attempting to convert IEB to the BSG composition would require additions of substantial B{sub 2}0{sub 3}, Na, and SiO{sub 2} (glass frit). IEB requires processing temperatures of 1400 to 1600{degrees}C, depending upon the waste composition. Production of the IEB waste form, using Joule heated melters, has proved difficult in the past because of electrode and refractory corrosion problems associated with the high temperature melts. Higher temperature electric melters (arc and plasma) are available to produce this final waste form. Past research focused on extensive slag property measurements, waste form leachability tests, mechanical, composition, and microstructure evaluations, as well as a host of experiments to improve production of the waste form. Past INEL studies indicated that the IEB glass-ceramic is a material that will accommodate and stabilize a wide range of heterogeneous waste materials, including long lived radionuclides and scrap metals, while maintaining a superior level of chemical and physical performance characteristics. Controlled cooling of the molten IEB and subsequent heat treatment will produce a glass-ceramic waste form with superior leach resistance.

Reimann, G.A.; Grandy, J.D.; Eddy, T.L.; Anderson, G.L.

1992-01-01T23:59:59.000Z

425

Reduction of Perchlorate and Nitrate by Aluminum Activated by pH Change and Electrochemically Induced Pitting Corrosion.  

E-Print Network [OSTI]

, pitting corrosion to remove the passivating oxide layer and expose the underlying, thermodynamically reactive, zero-valent aluminum. A partially oxidized species of aluminum, like monovalent aluminum, is believed to bring about the reduction of perchlorate...

Raut Desai, Aditya B.

2011-08-08T23:59:59.000Z

426

Iron ore and coal: pricing and volume up for these key export commodities  

SciTech Connect (OSTI)

Australia's huge coal and iron ore industries are booming. Up until now, the majors have benefited handsomely, but smaller players are beginning to muscle in. The article discusses development in both industries. 1 fig., 4 photos.

NONE

2006-01-15T23:59:59.000Z

427

Mechanisms controlling dissolved iron distribution in the North Pacific: A model study  

E-Print Network [OSTI]

Rue, E. L. , and K. W. Bruland (1995), Complexation of iron(the subsurface ocean [Rue and Bruland, 1995; Cullen et al. ,and Butler, 2009]. Rue and Bruland [1995] reported high L 2

2011-01-01T23:59:59.000Z

428

Iron, nutrient, and phytoplankton distributions in Oregon coastal Zanna Chase,1,2,3  

E-Print Network [OSTI]

and Bruland, 1998; Hutchins et al., 1998] has demonstrated that the addition of iron to incubation bottles is potentially an important variable controlling phytoplankton biomass and community compo- sition [Bruland et al

Kurapov, Alexander

429

Distribution and variability of iron input to Oregon coastal waters during the upwelling season  

E-Print Network [OSTI]

available to phytoplankton but over different timescales [Bruland and Rue, 2001]. [3] The proximity to iron and community composition [Bruland et al., 2001; Hutchins and Bruland, 1998; Johnson et al., 2001

Pierce, Stephen

430

Iron distribution in silicon after solar cell processing: Synchrotron analysis and predictive modeling  

E-Print Network [OSTI]

The evolution during silicon solar cell processing of performance-limiting iron impurities is investigated with synchrotron-based x-ray fluorescence microscopy. We find that during industrial phosphorus diffusion, bulk ...

Fenning, David P.

431

Reliability of two techniques for assessing cerebral iron deposits from structural MRI   

E-Print Network [OSTI]

Purpose: To test the reliability of two computational methods for segmenting cerebral iron deposits (IDs) in the ageing brain, given that its measurement in MRI is challenging due to the similar effect produced by other minerals, especially calcium...

Valdés Hernández, Maria C.; Jeong, Tina H.; Murray, Catherine; Bastin, Mark; Chappell, Francesca M.; Deary, Ian J; Wardlaw, Joanna M

432

Characterization of Urinary Iron Loss in the fsn (flaky skin) Anemia Mouse Mutant  

E-Print Network [OSTI]

., Ashland, OR) gating on live cells and excluding doublets. Gating was based on unstained and isotype controls. Western Blot of kidney samples and Antibodies fsn and WT littermate kidney was dissected after 4 weeks on a high iron diet. Half...

Kress, Robert Lee

2014-08-31T23:59:59.000Z

433

Structural Basis of Regiospecificity of a Mononuclear Iron Enzyme in Antibiotic Fosfomycin Biosynthesis  

E-Print Network [OSTI]

Hydroxypropylphosphonic acid epoxidase (HppE) is an unusual mononuclear iron enzyme that uses dioxygen to catalyze the oxidative epoxidation of (S)-2-hydroxypropylphosphonic acid (S-HPP) in the biosynthesis of the antibiotic ...

Yun, Danny

434

Vessel Cold-Ironing Using a Barge Mounted PEM Fuel Cell: Project...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Unlimited Release Printed February 2013 Vessel Cold-Ironing Using a Barge Mounted PEM Fuel Cell: Project Scoping and Feasibility Joseph W. Pratt and Aaron P. Harris Prepared by...

435

Electrical characterization of metal-to-insulator transition in iron silicide thin films on sillicone substrates.  

E-Print Network [OSTI]

??Iron Silicide (FeSi) films deposited on silicon substrates with the native SiO2 layer have shown a Metal-to-Insulator Transition (MIT) of more than four order of… (more)

Weerasinghe, Hasitha C

2006-01-01T23:59:59.000Z

436

Empire Without A Voice: Phoenician Iron Metallurgy and Imperial Strategy at Carthage  

E-Print Network [OSTI]

in Cyprus. In Early Metallurgy in Cyprus, 4000-500 B.C. ,57. Blyth, P.H. 1993. Metallurgy of Two Fragmentary ArchaicThe Beginning of Iron Metallurgy in Tuscany, with Special

Kaufman, Brett

2014-01-01T23:59:59.000Z

437

Spray drying and attrition behavior of iron catalysts for slurry phase Fischer-Tropsch synthesis  

E-Print Network [OSTI]

This thesis describes results of a study aimed at developing and evaluating attrition resistant iron catalysts prepared by spray drying technique. These catalysts are intended for Fischer-Tropsch (F-T) synthesis in a slurry bubble column reactor...

Carreto Vazquez, Victor Hugo

2004-11-15T23:59:59.000Z

438

Influences on the oceanic biogeochemical cycling of the hybrid-type metals, cobalt, iron, and manganese  

E-Print Network [OSTI]

Trace metal cycling is one of many processes that influence ocean ecosystem dynamics. Cobalt, iron, and manganese are redox active trace metal micro-nutrients with oceanic distributions that are influenced by both biological ...

Noble, Abigail Emery

2012-01-01T23:59:59.000Z

439

Company Name: General Dynamics Bath Iron Works Web Site: https://www.gdbiw.com  

E-Print Network [OSTI]

Company Name: General Dynamics Bath Iron Works Web Site: https://www.gdbiw.com Industry: Defense's largest city, Portland. Majors they typically recruit: Civil Engineering, Electrical Engineering, Mechanical Engineering Do they offer internships: Our summer internship program provides students

New Hampshire, University of

440

Development of fabrication techniques for europia/iron cermet reactor control-arm plates  

SciTech Connect (OSTI)

Dense europia spheroids were dispersed in iron powder prior to pressing and sintering. The plates had adequate strength and possessed a neutron absorption worth in excess of comparable cadmium plates. 4 refs.

Moore, D.A.; Tarrant, E.A.

1982-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Iron-niobium-aluminum alloy having high-temperature corrosion resistance  

DOE Patents [OSTI]

An alloy for use in high temperature sulfur and oxygen containing environments, having aluminum for oxygen resistance, niobium for sulfur resistance and the balance iron, is discussed. 4 figs., 2 tabs.

Hsu, Huey S.

1988-04-14T23:59:59.000Z

442

E-Print Network 3.0 - archean banded iron Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

, 1900 (2007);317Science Summary: or breccia and deepens upwards to either pelagic shale or banded iron-formation (Fig. 1). The succession has... insofar as sediments are...

443

Microstructure evolution in irons and steels: a tribute to David V. Edmonds  

E-Print Network [OSTI]

as cementite and cast iron, and in a variety of non-ferrous fields including high-density tungsten and uranium for his work, including the Vana- dium Award from the Institute of Materials, Minerals and Mining in both

Cambridge, University of

444

High-temperature superconductivity in a family of iron pnictide materials  

E-Print Network [OSTI]

variety of methods to create high-quality samples of various Iron Pnictide superconductors, to dope them with various chemicals and to characterise the resulting crystalline samples. I discuss in depth the signature of good quality crystals and the various...

Gillett, Jack

2011-11-08T23:59:59.000Z

445

Iron (III) Chloride doping of large-area chemical vapor deposition graphene  

E-Print Network [OSTI]

Chemical doping is an effective method of reducing the sheet resistance of graphene. This thesis aims to develop an effective method of doping large area Chemical Vapor Deposition (CVD) graphene using Iron (III) Chloride ...

Song, Yi, S.M. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

446

Consequence of total lepton number violation in strongly magnetized iron white dwarfs  

E-Print Network [OSTI]

The influence of neutrinoless electron to positron conversion on cooling of strongly magnetized iron white dwarfs is studied. It is shown that they can be good candidates for soft gamma-ray repeaters and anomalous X-ray pulsars.

V. B. Belyaev; P. Ricci; F. Simkovic; J. Adam, Jr.; M. Tater; E. Truhlik

2014-06-04T23:59:59.000Z

447

Thermal plasma processed ferro-magnetically ordered face-centered cubic iron at room temperature  

SciTech Connect (OSTI)

Here, we report tailor made phase of iron nanoparticles using homogeneous gas phase condensation process via thermal plasma route. It was observed that crystal lattice of nano-crystalline iron changes as a function of operating parameters of the plasma reactor. In the present investigation iron nanoparticles have been synthesized in presence of argon at operating pressures of 125–1000?Torr and fixed plasma input DC power of 6?kW. It was possible to obtain pure fcc, pure bcc as well as the mixed phases for iron nanoparticles in powder form as a function of operating pressure. The as synthesized product was characterized for understanding the structural and magnetic properties by using X-ray diffraction, vibrating sample magnetometer, and Mössbauer spectroscopy. The data reveal that fcc phase is ferromagnetically ordered with high spin state, which is unusual whereas bcc phase is found to be ferromagnetic as usual. Finally, the structural and magnetic properties are co-related.

Raut, Suyog A.; Kanhe, Nilesh S.; Bhoraskar, S. V.; Mathe, V. L., E-mail: vlmathe@physics.unipune.ac.in [Department of Physics, Savitribai Phule Pune University, Pune 411007 (India); Das, A. K. [Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India)

2014-10-28T23:59:59.000Z

448

E-Print Network 3.0 - abnormal brain iron Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Powered by Explorit Topic List Advanced Search Sample search results for: abnormal brain iron Page: << < 1 2 3 4 5 > >> 1 51ISSN 1756-8919Future Med. Chem. (2010) 2(1),...

449

Iron Oxide-Gold Core-Shell Nanoparticles and Thin-Film Assembly...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Oxide-Gold Core-Shell Nanoparticles and Thin-Film Assembly. Iron Oxide-Gold Core-Shell Nanoparticles and Thin-Film Assembly. Abstract: This paper reports findings of an...

450

TREATMENT SYSTEMS AN INTEGRATED APPROACH  

E-Print Network [OSTI]

ECOLOGICAL TREATMENT SYSTEMS AN INTEGRATED APPROACH TO THE TREATMENT OF WASTE AND WASTE WATER's naturally pure water #12;Wetland Ecology Our treatment systems incorporate a wide variety of wetland plants for on-site management and treatment of effluent and solid waste 3. Provide for surface water attenuation

Heal, Kate

451

WASTEWATER TREATMENT OVER SAND COLUMNS  

E-Print Network [OSTI]

93/0096 WASTEWATER TREATMENT OVER SAND COLUMNS TREATMENT YIELDS, LOCALISATION OF THE BIOMASS Domestic wastewater treatment by infiltration-percolation is a process that becomming common in France, a greater depth for desinfection purposes. KEYWORDS Wastewater treatment, Infiltration-percolation. Sand

Paris-Sud XI, Université de

452

Data on production and use of DRI: World and U. S. [Direct Reduced Iron  

SciTech Connect (OSTI)

This paper will present data on the production and use direct-reduced iron (DRI) worldwide, focusing primarily on its use in the United States. The author is indebted to the Midrex Corporation for the data on world production of DRI. The U.S. data is his own and he will explain later how it was collected. He uses the term DRI to include all forms of direct-reduced iron, whether briquettes, pellets or lump.

Jensen, H.B.

1993-01-01T23:59:59.000Z

453

High gradient magnetic separation of iron oxide minerals from soil clays  

E-Print Network [OSTI]

HIGH GRADIENT MAGNETIC SEPARATION OF IRON OXIDE MINERALS FROM SOIL CLAYS A Thesis by DARRELL GENE SCHULZE Submitted to the Graduate College of Texas AIM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1977 Major Subject: Soil Science HIGH GRADIENT MAGNETIC SEPARATION OF IRON OXIDE MINERALS FROM SOIL CLAYS A Thesis DARRELL GENE SCHULZE Approved as to style and content by: (Chairman of C ittee) epartm t) j (Member) (Membe December 1977...

Schulze, Darrell Gene

1977-01-01T23:59:59.000Z

454

Development of a hot isostatic pressing process for manufacturing silicon carbide particulate reinforced iron  

E-Print Network [OSTI]

DEVELOPMENT OP A BOT ISOSTATIC PRBSSIHG PROCESS POR HAHUPACTURIHG SILICON CARBIDE PARTICULATE RBINPORCBD IRON A Thesis by DAVID OSCAR OAKESON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1992 Major Subject: Aerospace Engineering DEVELOPMENT OF A EOT ISOSTATIC PRESBING PROCESB FOR MANUFACTURING BILICON CARBIDE PARTICULATE REINFORCED IRON A Thesis by DAVID OSCAR OAKESON Approved...

Oakeson, David Oscar

1992-01-01T23:59:59.000Z

455

On the role of mass-transport in electrodeposition of nickel-iron alloys  

SciTech Connect (OSTI)

Despite the extensive use of nickel-iron, the mechanism of codeposition is not well understood. The interactions occurring during codeposition are such that nickel deposition is inhibited in the presence of iron, and the resulting alloy deposit has a much higher iron to nickel ratio than the electrolyte. This type of interactive deposition is an example of what has been termed anomalous codeposition, which is also used in describing electrodeposition of iron group elements (iron, cobalt, and nickel) with each other, or with zinc, tin, lead, and cadmium. In Chapter 2 of this thesis, a critical review of the literature is presented. Various interpretations and proposed mechanisms for the anomalous deposition of the iron-group alloys, particularly nickel-iron, is discussed. The major objectives of this review are to provide unambiguous definitions for various codeposition schemes, including the anomalous deposition itself, reflect on some of the more widely accepted hypothesis describing this phenomenon, and summarize the more recent results of other investigators in the field. To elucidate the electrodeposition mechanism of magnetic alloys, a mathematical model is developed in Chapter 3. The model is applied to a rotating disk electrode system, with well understood hydrodynamics, and incorporates homogeneous reactions of metal-hydroxide complexes. In Chapter 4, the model is further used to investigate the effect of buffering agents which are commonly used in electroplating baths. Our understanding of the mechanism of electrode processes depends on the accurate measurement of these concentrations. The interfacial value of pH is particularly important for electrodeposition of the iron-group alloys. In Chapters 5 and 6, an in-situ nonintrusive technique for surface pH measurement is investigated by theoretical and experimental methods.

Hessami, S.; Tobias, C.W.

1990-11-01T23:59:59.000Z

456

Screening peach rootstocks for tolerance to iron deficiency stress: mechanisms of Fe?p3+ ?sreduction  

E-Print Network [OSTI]

SCREENING PEACH ROOTSTOCKS FOR TOLERANCE TO IRON DEFICIENCY STRESS: MECHANISMS OF FE REDUCTION A Thesis by JONATHAN NDA A. EGILLA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 1989 Major Subject: Horticulture SCREENING PEACH ROOTSTOCKS FOR TOLERANCE TO IRON DEFICIENCY STRESS: MECHANISMS OF FE REDUCTION A Thesis by JONATHAN NDA A. EGILLA Approved as to style and content by: . H...

Egilla, Jonathan Nda

1989-01-01T23:59:59.000Z

457

Frataxin (FXN) Based Regulation of the Iron-Sulfur Cluster Assembly Complex  

E-Print Network [OSTI]

ASSEMBLY ........................................................................... 25 II FRIENDREICH?S ATAXIA VARIANTS I154F AND W155R DIMINISH FRATAXIN-BASED ACTIVATION OF THE HUMAN IRON SULFUR CLUSTER ASSEMBLY COMPLEX... with permission from Darius J. R. Lane and Des R. Richardson (2010) Frataxin, a molecule of mystery: trading stability for function in its iron-binding site Biochem. J., 426(2) e1-e3. Copyright the Biochemical Society....................................... 12...

Rabb, Jennifer

2012-07-16T23:59:59.000Z

458

Iron sulfide oxidation and the chemistry of acid generation  

SciTech Connect (OSTI)

Acid mine drainage, produced from the oxidation of iron sulfides, often contains elevated levels of dissolved aluminum (Al), iron (Fe), and sulfate (SO{sub 4}) and low pH. Understanding the interactions of these elements associated with acid mine drainage is necessary for proper solid waste management planning. Two eastern oil shales were leached using humidity cell methods. This study used a New Albany Shale (4.6% pyrite) and a Chattanooga Shale (1.5% pyrite) were used. The leachates from the humidity cells were filtered, and the filtrates were analyzed for total concentrations of cations and anions. After correcting for significant solution species and complexes, ion activities were calculated from total concentrations. The results show that the activities of Fe{sup 3+}, Fe{sup 2+}, Al{sup 3+}, and SO{sub 4}{sup 2{minus}} increased due to the oxidation of pyrite. Furthermore, the oxidation of pyrite resulted in a decreased pH and an increased pe + pH (redox-potential). The Fe{sup 3+} and Fe{sup 2+} activities appeared to be controlled by amorphous Fe(OH){sub 3} solid phase above a pH of 6.0 and below pe + pH 11.0. The Fe{sup 3+}, Fe{sup 2+}, and SO{sub 4}{sup 2{minus}} activities reached saturation with respect to FeOHSO{sub 4} solid phase between pH 3.0 and 6.0 and below pe + pH 11.0. Below a pH of 3.0 and above a pe + pH of 11.0, Fe{sup 2+}, Fe{sup 3+}, and SO{sub 4}{sup 2{minus}} activities are supported by FeSO{sub 4}{center dot}7H{sub 2}O solid phase. Above a pH of 6.0, the Al{sup 3+} activity showed an equilibrium with amorphous Al(OH){sub 3} solid phase. Below pH 6.0, Al{sup 3+} and SO{sub 4}{sup 2{minus}} activities are regulated by the AlOHSO{sub 4} solid phase, irrespective of pe + pH. The results of this study suggest that under oxidizing conditions with low to high leaching potential, activities of Al and Fe can be predicted on the basis of secondary mineral formation over a wide range of pH and redox.

Sullivan, P.J.; Yelton, J.L. (Univ. of Wyoming Research Corp., Laramie (United States)); Reddy, K.J. (Univ. of Wyoming, Laramie (United States))

1988-06-01T23:59:59.000Z

459

Slurry Phase Iron Catalysts for Indirect Coal LIquefaction.  

SciTech Connect (OSTI)

This report covers the fourth six month period of this three year grant under the University Coal Research program. During this period, we have begun the synthesis of precipitated catalysts using a bench-top spray dryer. The influence of binders on particle strength was also studied using the ultrasonic fragmentation approach to derive particle breaking stress. A similar approach was used to derive particle strength of catalysts obtained from Mr. Robert Gormley at FETC. Over the next six month period, this work will be continued while the catalysts prepared here will be examined by TPR to determine reducibility and the extent of adverse iron-silica interactions. A fundamental study of Fe/silica interactions has been performed using temperature programmed reaction and TEM to provide understanding of how the silica binders influence the activity of Fe catalysts. To understand differences in the reducibility of the iron phase caused by silica, we have set up a temperature programmed reduction facility. TPR in H, as well as in CO was performed of Fe/ SiO, catalysts prepared by impregnation as well as by precipitation. What is unique about these studies is that high resolution TEM was performed on samples removed from the reactor at various stages of reduction. This helps provide direct evidence for the phase changes that are detected by TPR. We have continued the analysis of catalysts received from slurry reactor runs at Texas A&M university (TAMU) and the University of Kentucky Center for Applied Energy Research (CAER) by x-ray diffraction. The purpose of the XRD analysis was to determine the phase composition of catalysts derived from a slurry reaction run using Fe Fischer-Tropsch catalysts. We had previously described how catalyst removed in the hot wax may oxidize to magnetite if the wax is air-exposed. We have now received catalysts from CAER that were removed under a protective inert blanket, and we are in the process of analyzing them, but preliminary work presented here shows very little oxide by XRD. However, the catalyst that was used in these runs at CAER was a different composition than that used in previous runs, so the protective effect of an inert blanket will need further study. Finally, we point out how the interference by the wax can make it difficult in some cases to analyze the phases in a Fe catalyst. Several approaches have been used to remove the interference from the wax and we come to the surprising conclusion that Fe may be present in a working slurry reactor despite the high CO/ H{sub 2} ratio. Further work is underway to corroborate this finding.

Datye, A.K.

1997-08-08T23:59:59.000Z

460

Statistical analysis of the mechanical properties of thin walled ductile iron castings  

SciTech Connect (OSTI)

Ductile iron castings have long been used in the automotive market. Ductile iron is inexpensive to produce and has desirable fracture resistance and mechanical properties. However, the weight of ductile iron is driving an effort to reduce wall thickness in order to increase fuel economy. Traditionally, cast iron has been cast into thick, bulky shapes. Reducing the section size of cast iron can be done, but pushes foundry practice into new areas. A consortium of foundries, foundry suppliers, and automotive manufacturers has been pursuing the use of thin walled ductile cast iron. This paper investigates the mechanical behavior of three experimental heats of thin-wall castings in order to evaluate property trends and limits. Castings as thin as 1.7 mm (0.07 in) have been successfully cast. The study was designed to investigate the effects of thickness and different casting heats on the dependent variables of ultimate tensile strength, yield strength, elongation-to-failure, reduction in area, and hardness. The ultimate tensile strength of the castings is found to increase as the casting thickness decreases. Conversely, the elongation-to-failure is found to decrease as the casting thickness decreases. Heat-to-heat differences were found, but they were usually within the scatter of the data.

Schrems, Karol K.; Hawk, Jeffrey A.; Dogan, Omer N.; Druschitz, A.P. (Intermet)

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Vapour phase approach for iron oxide nanoparticle synthesis from solid precursors  

SciTech Connect (OSTI)

A new non-solution mediated approach to the synthesis of iron oxide nanoparticles directly from solid FeCl{sub 2} salt precursors has been developed. The method is rapid, simple and scalable. The structural properties and the phase of the resulting iron oxide particles has been determined by a range of methods including XRD, FT-IR and Mössbauer spectroscopy, and the phase is shown to be maghemite (?-Fe{sub 2}O{sub 3}). The magnetic properties of the iron oxide particles have been measured using SQUID, confirming superparamagnetic behaviour of the powder and a saturation magnetization of 53.0 emu g{sup ?1} at 300 K. Aqueous dispersions at increasing concentrations were prepared and their heating rate under a 400 kHz alternating magnetic field measured. The specific absorption rate (SAR) of the iron oxide was found to be 84.8 W g{sup ?1}, which makes the material suitable for the formulation of ferrofluids or ferrogels with RF heating properties. - Graphical Abstract: Superparamagnetic iron oxide nanoparticles obtained by a novel vapour phase approach. Highlights: ? Novel vapour phase (non-solvent) approach for iron oxide nanoparticle synthesis. ? Attractive alternative approach to the present co-precipitation method. ? Better magnetic properties with high coercivity of nanoparticles. ? A high specific absorption rate (SAR) for hyperthermia applications.

Singh, Mandeep; Ulbrich, Pavel; Prokopec, Vadym [Institute of Chemical Technology Prague, Technicka 5, 166 28 Prague 6 (Czech Republic); Svoboda, Pavel [Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 120 00 Prague 2 (Czech Republic); Šantavá, Eva [Institute of Physics ASCR, Na Slovance 2, 182 21 Prague 8 (Czech Republic); Št?pánek, František, E-mail: Frantisek.Stepanek@vscht.cz [Institute of Chemical Technology Prague, Technicka 5, 166 28 Prague 6 (Czech Republic)

2013-04-15T23:59:59.000Z

462

Lead iron phosphate glass as a containment medium for disposal of high-level nuclear waste  

DOE Patents [OSTI]

Lead-iron phosphate glasses containing a high level of Fe.sub.2 O.sub.3 for use as a storage medium for high-level radioactive nuclear waste. By combining lead-iron phosphate glass with various types of simulated high-level nuclear waste, a highly corrosion resistant, homogeneous, easily processed glass can be formed. For corroding solutions at 90.degree. C., with solution pH values in the range between 5 and 9, the corrosion rate of the lead-iron phosphate nuclear waste glass is at least 10.sup.2 to 10.sup.3 times lower than the corrosion rate of a comparable borosilicate nuclear waste glass. The presence of Fe.sub.2 O.sub.3 in forming the lead-iron phosphate glass is critical. Lead-iron phosphate nuclear waste glass can be prepared at temperatures as low as 800.degree. C., since they exhibit very low melt viscosities in the 800.degree. to 1050.degree. C. temperature range. These waste-loaded glasses do not readily devitrify at temperatures as high as 550.degree. C. and are not adversely affected by large doses of gamma radiation in H.sub.2 O at 135.degree. C. The lead-iron phosphate waste glasses can be prepared with minimal modification of the technology developed for processing borosilicate glass nuclear wasteforms.

Boatner, Lynn A. (Oak Ridge, TN); Sales, Brian C. (Oak Ridge, TN)

1989-01-01T23:59:59.000Z

463

Molten iron oxysulfide as a superior sulfur sorbent. Final report, [September 1989--1993  

SciTech Connect (OSTI)

The studies had as original objective the analysis of conditions for using liquid iron oxysulfide as a desulfuring agent during coal gasification. Ancillary was a comparison of iron oxysulfide with lime as sorbents under conditions where lime reacts with S-bearing gases to form Ca sulfate or sulfide. Primary thrust is to determine the thermodynamic requirements for desulfurization by iron additions (e.g., taconite concentrate) during combustion in gasifiers operating at high equivalence ratios. Thermodynamic analysis of lime-oxygen-sulfur system shows why lime is injected into burners under oxidizing conditions; reducing conditions forms CaS, requiring its removal, otherwise oxidation and release of S would occur. Iron as the oxysulfide liquid has a range of stability and can be used as a desulfurizing agent, if the burner/gasifier operates in a sufficiently reducing regime (high equivalence ratio); this operating range is given and is calculable for a coal composition, temperature, stoichiometry. High moisture or hydrogen contents of the coal yield a poorer degree of desulfurization. Kinetic tests on individual iron oxide particles on substrates or Pt cups with a TGA apparatus fail to predict reaction rates within a burner. Preliminary tests on the Dynamic Containment Burner with acetylene give some promise that this system can produce the proper conditions of coal gasification for use of added iron as a sulfur sorbent.

Hepworth, M.T.

1993-03-31T23:59:59.000Z

464

Microstructure Evolution of Gas Atomized Iron Based ODS Alloys  

SciTech Connect (OSTI)

In a simplified process to produce precursor powders for oxide dispersion-strengthened (ODS) alloys, gas-atomization reaction synthesis (GARS) was used to induce a surface oxide layer on molten droplets of three differing erritic stainless steel alloys during break-up and rapid solidification. The chemistry of the surface oxide was identified using auger electron spectroscopy (AES) and scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). The precursor iron-base powders were consolidated at 850 C and 1,300 C using hot isostatic pressing (HIPing). Consolidation at the lower temperature resulted in a fully dense microstructure, while preventing substantial prior particle-boundary-oxide dissociation. Microstructural analysis of the alloys consolidated at the higher temperature confirmed a significant reduction in prior-particle-boundary-oxide volume fraction, in comparison with the lower-temperature-consolidated sample. This provided evidence that a high-temperature internal oxygen-exchange reaction occurred between the metastable prior particle-boundary-oxide phase (chromium oxide) and the yttrium contained within each prior particle. This internal oxygen-exchange reaction is shown to result in the formation of yttrium-enriched oxide dispersoids throughout the alloy microstructure. The evolving microstructure was characterized using transmission electron microscopy (TEM) and high-energy X-ray diffraction (HE-XRD).

Rieken, J.R.; Anderson, I.E.; Kramer, M.J.

2011-08-09T23:59:59.000Z

465

Transmission of fast neutrons through an iron sphere  

SciTech Connect (OSTI)

Integral Experiments have been performed using a homogeneous iron spherical shell to test neutron cross-section data. Neutron leakage spectra from the shell were measured using /sup 252/Cf-fission and (deuterium-tritium) D-T-fusion neutron sources and an Ne-213 spectrometry system. An associated particle detector was used to monitor the absolute D-T neutron source strength as well as any accompanying deuterium-deuterium neutron contamination. The leakage spectra were calculated using the continuous-energy Monte Carlo code VIM and the discrete ordinates S/sub n/ code ANISN employing ENDF/B-IV. For neutron energies between 1 and 5 MeV, the calculations underpredicted the leakage spectrum by factors of 1.4 to 2 for the Californium neutron source and 2 to 3 for the D-T neutron source. The large discrepancies are attributed to inadequate representation of cross-section resonance structure (namely, minima); inadequate representation of the angular and secondary energy distributions for continuum inelastic scattering and (n,2n) reactions also contribute to these discrepancies.

Hertel N.E.; Johnson, R.H.; Wehring, B.W.; Dorning, J.J.

1986-03-01T23:59:59.000Z

466

Measurements and analyses of neutron transport through iron  

SciTech Connect (OSTI)

Integral experiments have been performed using a thick homogeneous spherical shell of iron to test existing neutron cross section data. Neutron leakage spectra were measured for Cf-252-fission and DT-fusion neutron sources using an NE-213 spectrometry system. An associated particle detector monitored the absolute DT neutron source strength and the amount of DD neutron contamination in the DT source spectrum. The leakage spectra were calculated using the continuous-energy Monte Carlo code VIM and the discrete-S/sub n/ code ANISN. For neutron energies between 1 and 5 MeV, the calculations underpredicted the leakage spectrum by factors of 2 to 1.4 for the Cf neutron source and of 3 to 2 for the DT neutron source. The large discrepancies are attributed to inadequate representation of cross-section resonance structure (viz., minima); inadequate representation of the angular and secondary energy distributions for continuum inelastic scattering and (n, 2n) reactions may also contribute to these discrepancies.

Hertel, N.E.; Johnson, R.H.; Dorning, J.J.; Wehring, B.W.

1980-09-01T23:59:59.000Z

467

Thermodynamic Development of Corrosion Rate Modeling in Iron Phosphate Glasses  

SciTech Connect (OSTI)

A two year research program investigated links between the thermodynamic properties of phosphate glasses and their corrosion rates in different solutions. Glasses in the Na{sub 2}O-CaO-P{sub 2}O{sub 5} and Na{sub 2}O-Fe{sub 2}O{sub 3}-PO{sub 5} systems were prepared and characterized. These glasses and then exposed in bulk and powder form to acid (0.1M HCl), basic (0.1M KOH) and neutral (deionized water) solutions at varying exposure times and temperatures. Analysis of the solution and the glass after exposure determined the rate and type of corrosion that occurred. Simultaneously, efforts were made to determine the thermodynamic properties of solid iron phosphate compounds. This included measurement of low Â?temperature (5Â?300 K) heat capacities, measured at Brigham Young University; the attempted use of a Parr calorimeter to measure ambient Â?temperature enthalpies of formation; and attempted measurement of Â?temperature heat capacities. Only the first of the three tasks was successfully accomplished. In lieu of experimental measurement of enthalpies of formation, first-principles calculation of enthalpies of formation was performed at Missouri S&T; these results will be used in subsequent modeling efforts.

Schlesinger, Mark; Vienna, John; Bresee, Jim; Brow, Richard

2011-10-31T23:59:59.000Z

468

Spin transition in a four-coordinate iron oxide  

SciTech Connect (OSTI)

The spin transition, or spin crossover, is a manifestation of electronic instability induced by external constraints such as pressure1. Among known examples that exhibit spin transition, 3d ions with d6 electron configurations represent the vast majority, but the spin transition observed thus far has been almost exclusively limited to that between high-spin (S = 2) and low-spin (S = 0) states2-9. Here we report a novel high-spin to intermediate-spin (S = 1) state transition at 33 GPa induced by pressurization of an antiferromagnetic insulator SrFeO2 with a square planar coordination10. The change in spin multiplicity brings to ferromagnetism as well as metallicity, yet keeping the ordering temperature far above ambient. First-principles calculations attribute the origin of the transition to the strong inlayer hybridization between Fe dx 2 -y 2 O p , leading to a pressure-induced electronic instability toward the depopulation of Fe dx 2 -y 2 O p antibonding states. Furthermore, the ferromagnetic S = 1 state is half-metallic due to the inception of half-occupied spin-down (dxz, dyz) degenerate states upon spin transition. These results highlight the square-planar coordinated iron oxides as a new class of magnetic and electric materials and provide new avenues toward realizing multi-functional sensors and data-storage devices.

Kawakami, T. [Nihon University, Tokyo; Sutou, S. [Nihon University, Tokyo; Hirama, H. [Nihon University, Tokyo; Sekiya, Y. [Nihon University, Tokyo; Makino, T. [Nihon University, Tokyo; Tsujimoto, Y. [Kyoto University, Japan; Kitada, A. [Kyoto University, Japan; Tassel, C. [Kyoto University, Japan; Kageyama, H. [Kyoto University, Japan; Yoshimura, K. [Kyoto University, Japan; Chen, Xingqiu [ORNL; Fu, Chong Long [ORNL; Okada, T. [University of Tokyo, Tokyo, Japan; Yagi, T. [University of Tokyo, Tokyo, Japan; Hayashi, N. [Kyoto University, Japan; Nasu, S. [Osaka University; Podloucky, R. [Institut fur Physikalische Chemie der RWTH; Takano, M. [Kyoto University, Japan

2009-01-01T23:59:59.000Z

469

Melter Throughput Enhancements for High-Iron HLW  

SciTech Connect (OSTI)

This report describes work performed to develop and test new glass and feed formulations in order to increase glass melting rates in high waste loading glass formulations for HLW with high concentrations of iron. Testing was designed to identify glass and melter feed formulations that optimize waste loading and waste processing rate while meeting all processing and product quality requirements. The work included preparation and characterization of crucible melts to assess melt rate using a vertical gradient furnace system and to develop new formulations with enhanced melt rate. Testing evaluated the effects of waste loading on glass properties and the maximum waste loading that can be achieved. The results from crucible-scale testing supported subsequent DuraMelter 100 (DM100) tests designed to examine the effects of enhanced glass and feed formulations on waste processing rate and product quality. The DM100 was selected as the platform for these tests due to its extensive previous use in processing rate determination for various HLW streams and glass compositions.

Kruger, A. A. [Department of Energy, Office of River Protection, Richland, Washington (United States); Gan, Hoa [The Catholic University of America, Washington, DC (United States); Joseph, Innocent [The Catholic University of America, Washington, DC (United States); Pegg, Ian L. [The Catholic University of America, Washington, DC (United States); Matlack, Keith S. [The Catholic University of America, Washington, DC (United States); Chaudhuri, Malabika [The Catholic University of America, Washington, DC (United States); Kot, Wing [The Catholic University of America, Washington, DC (United States)

2012-12-26T23:59:59.000Z

470

Identification of Iron-reducing Thermus strains as Thermus scotoductus  

SciTech Connect (OSTI)

Thermus strain SA-01, previously isolated from a deep (3.2) South African gold mine, is closely related to Thermus strains NMX2 A.1 and VI-7 (previously isolated from thermal springs in New Mexico USA and Portugal, respectively). Thermus strains SA-01 and NMX2 A.1 have also been shown previously to grow using nitrate, Fe(III), , Mn(IV) or So as terminal electron acceptors and to be capable of reducing Cr(VI), U(VI), Co(III), and the quinine-containing compound anthraquinone-2,6-disulfonate. The objectives of this study were to determine the phylogenetic positions of the three known metal-reducing Thermus strains and to determine the phylogenetic significance of metal reduction within the genus Thermus. Phylogenetic analyses of 16S rDNA sequences, BOX PCR genomic fingerprinting, and DNA-DNA reassociation analyses indicated that these strains belong to the previously described genospecies T. scotoductus. The morphologies and lipid fatty acid profiles of these metal-reducing strains are consistent with their identification as T. scotoductus; however, the T. scotoductus strains tested in this study evinced a wide intraspecies variability in some other phenotypic traits, e.g., carbon substrate utilization and pigmentation. Iron reduction occurred in all strains of T. scotoductus tested except the mixotrophic, sulfur-oxidizing strain IT-7254. Thermus strains belonging to other species did not reduce Fe(III) to Fe(II) or reduced it only poorly.

Balkwill, David L.; Kieft, T L.; Tsukuda, Toyoko; Kostandarithes, Heather M.; Onstott, T C.; Macnaughton, S.; Bownas, J.; Fredrickson, Jim K.

2004-02-01T23:59:59.000Z

471

Coal pile leachate treatment  

SciTech Connect (OSTI)

The steam plant located at the Oak Ridge National Laboratory was converted from oil- to coal-fired boilers. In the process, a diked, 1.6-ha coal storage yard was constructed. The purpose of this report is to describe the treatment system designed to neutralize the estimated 18,000 m/sup 3/ of acidic runoff that will be produced each year. A literature review and laboratory treatability study were conducted which identified two treatment systems that will be employed to neutralize the acidic runoff. The first, a manually operated system, will be constructed at a cost of $200,000 and will operate for an interim period of four years. This system will provide for leachate neutralization until a more automated system can be brought on-line. The second, a fully automated system, is described and will be constructed at an estimated cost of $650,000. This automated runoff treatment system will ensure that drainage from the storage yard meets current National Pollutant Discharge Elimination System Standards for pH and total suspended solids, as well as future standards, which are likely to include several metals along with selected trace elements.

Davis, E C; Kimmitt, R R

1982-09-01T23:59:59.000Z

472

Co-Production of Electricity and Hydrogen Using a Novel Iron-based Catalyst  

SciTech Connect (OSTI)

The primary objective of this project was to develop a hydrogen production technology for gasification applications based on a circulating fluid-bed reactor and an attrition resistant iron catalyst. The work towards achieving this objective consisted of three key activities: • Development of an iron-based catalyst suitable for a circulating fluid-bed reactor • Design, construction, and operation of a bench-scale circulating fluid-bed reactor system for hydrogen production • Techno-economic analysis of the steam-iron and the pressure swing adsorption hydrogen production processes. This report describes the work completed in each of these activities during this project. The catalyst development and testing program prepared and iron-based catalysts using different support and promoters to identify catalysts that had sufficient activity for cyclic reduction with syngas and steam oxidation and attrition resistance to enable use in a circulating fluid-bed reactor system. The best performing catalyst from this catalyst development program was produced by a commercial catalyst toll manufacturer to support the bench-scale testing activities. The reactor testing systems used during material development evaluated catalysts in a single fluid-bed reactor by cycling between reduction with syngas and oxidation with steam. The prototype SIP reactor system (PSRS) consisted of two circulating fluid-bed reactors with the iron catalyst being transferred between the two reactors. This design enabled demonstration of the technical feasibility of the combination of the circulating fluid-bed reactor system and the iron-based catalyst for commercial hydrogen production. The specific activities associated with this bench-scale circulating fluid-bed reactor systems that were completed in this project included design, construction, commissioning, and operation. The experimental portion of this project focused on technical demonstration of the performance of an iron-based catalyst and a circulating fluid-bed reactor system for hydrogen production. Although a technology can be technically feasible, successful commercial deployment also requires that a technology offer an economic advantage over existing commercial technologies. To effective estimate the economics of this steam-iron process, a techno-economic analysis of this steam iron process and a commercial pressure swing adsorption process were completed. The results from this analysis described in this report show the economic potential of the steam iron process for integration with a gasification plant for coproduction of hydrogen and electricity.

Hilaly, Ahmad; Georgas, Adam; Leboreiro, Jose; Arora, Salil; Head, Megann; Trembly, Jason; Turk, Brian; Gupta, Raghubir

2011-09-30T23:59:59.000Z

473

Iron porphyrin polymer films: Materials for the modification of electrode surfaces and the detection of nitric oxide  

SciTech Connect (OSTI)

We are currently investigating a new method for the detection and quantification of nitric oxide (NO) based on a carbon electrode chemically modified with an iron porphyrin polymer film. Commercially available vinyl-substituted iron porphyrin monomers can be polymerized directly onto electrode surfaces through a published electrochemical polymerization process. We are also developing a synthesis for a new vinyl-substituted monomer, iron 5,10,15-triphenyl-20-vinyl porphyrin chloride, in hopes of improving polymer film stability. The electrochemistry of NO is also being investigated at electrodes chemically modified with an iron porphyrin polymer film. We are studying the catalytic oxidation of iron porphyrin bound NO to nitrate by molecular oxygen. The reaction with molecular oxygen is preceded by a one electron reduction of the iron porphyrin-NO complex. If currents proportional to nitric oxide concentration can be measured, a new NO electrochemical sensor will be designed.

McGuire, M.; Drew, S.M. [Carleton College, Northfield, MN (United States)

1996-10-01T23:59:59.000Z

474

BULKING SLUDGE TREATMENT BY MICROSCOPIC OBSERVATION AND MECHANICAL TREATMENT  

E-Print Network [OSTI]

for the operation of the biological stage of waste water treatment plants. If the threatening extensive growth of wastewater treatment plants often need a complex control for the optimal processing. The measurement status and for the regulation of biological parts in waste water treatment plants. Furthermore, e

475

Iron Biomineralization: Implications on the Fate of Arsenic in Landfills  

E-Print Network [OSTI]

, the U.S. Environmental Protection Agency lowered the Maximum Contaminant Level (MCL) of arsenic on groundwater, this issue of contamination of groundwater is of particular importance to the state. Groundwater the treatment of ion exchange/membrane processes brine solutions. Sodium arsenate heptahydrate (Na2HAsO4.7H2O

Fay, Noah

476

Heat treatment furnace  

DOE Patents [OSTI]

A furnace heats through both infrared radiation and convective air utilizing an infrared/purge gas design that enables improved temperature control to enable more uniform treatment of workpieces. The furnace utilizes lamps, the electrical end connections of which are located in an enclosure outside the furnace chamber, with the lamps extending into the furnace chamber through openings in the wall of the chamber. The enclosure is purged with gas, which gas flows from the enclosure into the furnace chamber via the openings in the wall of the chamber so that the gas flows above and around the lamps and is heated to form a convective mechanism in heating parts.

Seals, Roland D; Parrott, Jeffrey G; DeMint, Paul D; Finney, Kevin R; Blue, Charles T

2014-10-21T23:59:59.000Z

477

Interplay of superconductivity, magnetism, and density waves in rare-earth tritellurides and iron-based superconducting materials  

E-Print Network [OSTI]

3. Magnetism in Metals . . . . . . . . . . . . . . . . .IV Superconductivity and Magnetism in Iron-PnictideIII Superconductivity, Magnetism and Charge-Density Waves in

Zocco, Diego Andrés

2011-01-01T23:59:59.000Z

478

A Comparison of Iron and Steel Production Energy Use and Energy Intensity in China and the U.S.  

E-Print Network [OSTI]

25 Table 18: Total Energy Consumption of China's Steelalmost doubled, but total energy consumption only increasedsources of total energy consumption data for China’s iron

Hasanbeigi, Ali

2012-01-01T23:59:59.000Z

479

Millimeter wave ferromagnetic resonance in gallium-substituted ?-iron oxide  

SciTech Connect (OSTI)

In millimeter wave frequency range, hexagonal ferrites with high uniaxial anisotropic magnetic fields are used as absorbers. These ferrites include M-type barium ferrite (BaFe{sub 12}O{sub 19}) and strontium ferrite (SrFe{sub 12}O{sub 19}), which have natural ferromagnetic resonant frequency range from 40 GHz to 60?GHz. However, the higher frequency range lacks suitable materials that support the higher frequency ferromagnetic resonance. A new series of gallium-substituted ?-iron oxides (?-Ga{sub x}Fe{sub 2?x}O{sub 3}) are synthesized which have ferromagnetic resonant frequencies appearing over the frequency range 30 GHz–150 GHz. The ?-Ga{sub x}Fe{sub 2?x}O{sub 3} is synthesized by the combination of reverse micelle and sol-gel techniques or the sol-gel method only. The particle sizes are observed to be smaller than 100 nm. In this paper, the free space magneto-optical approach has been employed to study these newly developed ?-Ga{sub x}Fe{sub 2?x}O{sub 3} particles in millimeter waves. This technique enables to obtain precise transmission spectra to determine the dielectric and magnetic properties of both isotropic and anisotropic ferrites in the millimeter wave frequency range from a single set of direct measurements. The transmittance and absorbance spectra of ?-Ga{sub x}Fe{sub 2?x}O{sub 3} are shown in this paper. Strong ferromagnetic resonances at different frequencies determined by the x parameter are found.

Chao, Liu, E-mail: liu.chao@tufts.edu; Afsar, Mohammed N. [Department of Electrical and Computer Engineering, Tufts University, Medford, Massachusetts 02155 (United States); Ohkoshi, Shin-ichi [Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

2014-05-07T23:59:59.000Z

480

The mechanism for iron-catalyzed alkene isomerization in solution  

SciTech Connect (OSTI)

Here we report nano- through microsecond time-resolved IR experiments of iron-catalyzed alkene isomerization in room-temperature solution. We have monitored the photochemistry of a model system, Fe(CO){sub 4}({eta}{sup 2}-1-hexene), in neat 1-hexene solution. UV-photolysis of the starting material leads to the dissociation of a single CO to form Fe(CO){sub 3}({eta}{sup 2}-1-hexene), in a singlet spin state. This CO loss complex shows a dramatic selectivity to form an allyl hydride, HFe(CO){sub 3}({eta}{sup 3}-C{sub 6}H{sub 11}), via an internal C-H bond-cleavage reaction in 5-25 ns. We find no evidence for the coordination of an alkene molecule from the bath to the CO loss complex, but do observe coordination to the allyl hydride, indicating that it is the key intermediate in the isomerization mechanism. Coordination of the alkene ligand to the allyl hydride leads to the formation of the bis-alkene isomers, Fe(CO){sub 3}({eta}{sup 2}-1-hexene)({eta}{sup 2}-2-hexene) and Fe(CO){sub 3}({eta}{sup 2}-1-hexene){sub 2}. Because of the thermodynamic stability of Fe(CO){sub 3}({eta}{sup 2}-1-hexene)({eta}{sup 2}-2-hexene) over Fe(CO){sub 3}({eta}{sup 2}-1-hexene){sub 2} (ca. 12 kcal/mol), nearly 100% of the alkene population will be 2-alkene. The results presented herein provide the first direct evidence for this mechanism in solution and suggest modifications to the currently accepted mechanism.

Sawyer, Karma R.; Glascoe, Elizabeth A.; Cahoon, James F.; Schlegel, Jacob P.; Harris, Charles B.

2008-05-27T23:59:59.000Z

Note: This page contains sample records for the topic "zero-valent iron treatment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Kinetics of the reduction of the zinc oxide in zinc ferrite with iron  

SciTech Connect (OSTI)

Electric arc furnace (EAF) dust, which can be considered as a by-product of the steel recycling process, contains significant quantities of recoverable zinc and iron, as well as hazardous elements such as cadmium, lead and chromium, which can be leached by ground water. The zinc in the EAF dust is found almost entirely in the form of either zinc oxide or zinc ferrite, the latter accounting for 20 to 50 percent of the total zinc. It is important that an efficient process be developed which renders the dust inert, while reclaiming the valuable metals to off-set processing costs. During the conventional carbothermic reduction processes, iron is formed, and this iron can participate in the reduction of the zinc oxide in zinc ferrite. In the present work, the reduction of the zinc oxide in zinc ferrite by iron according to the following reaction: ZnO{sup {sm_bullet}}Fe{sub 2}O{sub (s.s.)} + 2 Fe{sub (s)} = Zn{sub (g)} + 4 FeO{sub (s)} was studied in an argon atmosphere using a thermogravimetric technique. First, a thermodynamic analysis was performed using the F*A*C*T computational system. Then, the effects of briquette aspect ratio (l/d), temperature, zinc ferrite particle size, amount of iron added, as well as additions such as lime, sodium chloride, and calcium fluoride were investigated.

Donald, J.R.; Pickles, C.A. [Queen`s Univ., Kingston, Ontario (Canada). Dept. of Materials and Metallurgical Engineering

1995-12-31T23:59:59.000Z

482

Iron Speciation and Mixing in Single Aerosol Particles from the Asian Continental Outflow  

SciTech Connect (OSTI)

Bioavailable iron from atmospheric aerosol is an essential nutrient that can control oceanic productivity, thereby impacting the global carbon budget and climate. Particles collected on Okinawa Island during an atmospheric pollution transport event from China were analyzed using complementary single particle techniques to determine the iron source and speciation. Comparing the spatial distribution of iron within ambient particles and standard Asian mineral dust, it was determined that field-collected atmospheric Fe-containing particles have numerous sources, including anthropogenic sources such as coal combustion. Fe-containing particles were found to be internally mixed with secondary species such as sulfate, soot, and organic carbon. The mass weighted average Fe(II) fraction (defined as Fe(II)/[Fe(II)+Fe(III)]) was determined to be 0.33 {+-} 0.08. Within the experimental uncertainty, this value lies close to the range of 0.26-0.30 determined for representative Asian mineral dust. Previous studies have indicated that the solubility of iron from combustion is much higher than that from mineral dust. Therefore, chemical and/or physical differences other than oxidation state may help explain the higher solubility of iron in atmospheric particles.

Moffet, Ryan C.; Furutani, Hiroshi; Rodel, Tobias; Henn, Tobias R.; Sprau, Peter; Laskin, Alexander; Uematsu, Mitsuo; Gilles, Marry K.

2012-04-04T23:59:59.000Z

483

Method of manufacturing iron aluminide by thermomechanical processing of elemental powders  

DOE Patents [OSTI]

A powder metallurgical process of preparing iron aluminide useful as electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 20 to 32% Al, and optional additions such as .ltoreq.1% Cr, .gtoreq.05% Zr or ZrO.sub.2 stringers extending perpendicular to an exposed surface of the heating element, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B, .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1 % rare earth metal, .ltoreq.1% oxygen, and/or .ltoreq.3% Cu. The process includes forming a mixture of aluminum powder and iron powder, shaping the mixture into an article such as by cold rolling the mixture into a sheet, and sintering the article at a temperature sufficient to react the iron and aluminum powders and form iron aluminide. The sintering can be followed by hot or cold rolling to reduce porosity created during the sintering step and optional annealing steps in a vacuum or inert atmosphere.

Deevi, Seetharama C. (Midlothian, VA); Lilly, Jr., A. Clifton (Chesterfield, VA); Sikka, Vinod K. (Oak Ridge, TN); Hajaligol, Mohammed R. (Richmond, VA)

2000-01-01T23:59:59.000Z

484

Methylmercury Production in Tidal Salt Marsh Sediments and Potential Control Using Iron Amendments  

E-Print Network [OSTI]

phosphorus removal in treatment wetlands (Ann et al. 2000),within a wetland soil following ferric chloride treatment to

Ulrich, Patrick D.

2011-01-01T23:59:59.000Z

485

HIV and Its Treatment Is My Treatment Regimen Working? Is My Treatment Regimen Working?  

E-Print Network [OSTI]

viral load, it's important to closely follow your treatment regimen. Poor treatment adherence can also blood tests to monitor your HIV treatment: CD4 count and viral load test. The results of the tests need a CD4 count only once every 6 to 12 months. What is a viral load test? Preventing HIV from

Levin, Judith G.

486

Neutrino-driven supernova of a low-mass iron-core progenitor boosted by three-dimensional turbulent convection  

E-Print Network [OSTI]

We present the first successful simulation of a neutrino-driven supernova explosion in three dimensions (3D), using the Prometheus-Vertex code with an axis-free Yin-Yang grid and a sophisticated treatment of three-flavor, energy-dependent neutrino transport. The progenitor is a non-rotating, zero-metallicity 9.6 Msun star with an iron core. While in spherical symmetry outward shock acceleration sets in later than 300 ms after bounce, a successful explosion starts at ~130 ms post-bounce in two dimensions (2D). The 3D model explodes at about the same time but with faster shock expansion than in 2D and a more quickly increasing and roughly 10 percent higher explosion energy. The more favorable explosion conditions in 3D are explained by lower temperatures and thus reduced neutrino emission in the cooling layer below the gain radius. This moves the gain radius inward and leads to a bigger mass in the gain layer, whose larger recombination energy boosts the explosion energy in 3D. These differences are caused by l...

Melson, Tobias; Marek, Andreas

2015-01-01T23:59:59.000Z

487

The continental margin is a key source of iron to the HNLC North Pacific Ocean  

SciTech Connect (OSTI)

Here we show that labile particulate iron and manganese concentrations in the upper 500m of the Western Subarctic Pacific, an iron-limited High Nutrient Low Chlorophyll (HNLC) region, have prominent subsurface maxima between 100-200 m, reaching 3 nM and 600 pM, respectively. The subsurface concentration maxima in particulate Fe are characterized by a more reduced oxidation state, suggesting a source from primary volcagenic minerals such as from the Kuril/Kamchatka margin. The systematics of these profiles suggest a consistently strong lateral advection of labile Mn and Fe from redox-mobilized labile sources at the continental shelf supplemented by a more variable source of Fe from the upper continental slope. This subsurface supply of iron from the continental margin is shallow enough to be accessible to the surface through winter upwelling and vertical mixing, and is likely a key source of bioavailable Fe to the HNLC North Pacific.

Lam, P.J.; Bishop, J.K.B

2008-01-15T23:59:59.000Z

488

Semiconductor sensor for optically measuring polarization rotation of optical wavefronts using rare earth iron garnets  

DOE Patents [OSTI]

Described are the design of a rare earth iron garnet sensor element, optical methods of interrogating the sensor element, methods of coupling the optical sensor element to a waveguide, and an optical and electrical processing system for monitoring the polarization rotation of a linearly polarized wavefront undergoing external modulation due to magnetic field or electrical current fluctuation. The sensor element uses the Faraday effect, an intrinsic property of certain rare-earth iron garnet materials, to rotate the polarization state of light in the presence of a magnetic field. The sensor element may be coated with a thin-film mirror to effectively double the optical path length, providing twice the sensitivity for a given field strength or temperature change. A semiconductor sensor system using a rare earth iron garnet sensor element is described.

Duncan, Paul G. (8544 Electric Ave., Vienna, VA 22182)

2002-01-01T23:59:59.000Z

489

Research, development, and demonstration of nickel-iron batteries for electric vehicle propulsion. Annual report, 1980  

SciTech Connect (OSTI)

The objective of the Eagle-Picher nickel-iron battery program is to develop a nickel-iron battery for use in the propulsion of electric and electric-hybrid vehicles. To date, the program has concentrated on the characterization, fabrication and testing of the required electrodes, the fabrication and testing of full-scale cells, and finally, the fabrication and testing of full-scale (270 AH) six (6) volt modules. Electrodes of the final configuration have now exceeded 1880 cycles and are showing minimal capacity decline. Full-scale cells have presently exceeded 600 cycles and are tracking the individual electrode tests almost identically. Six volt module tests have exceeded 500 cycles, with a specific energy of 48 Wh/kg. Results to date indicate the nickel-iron battery is beginning to demonstrate the performance required for electric vehicle propulsion.

Not Available

1981-03-01T23:59:59.000Z

490

System and method for making metallic iron with reduced CO.sub.2 emissions  

DOE Patents [OSTI]

A method and system for making metallic iron nodules with reduced CO.sub.2 emissions is disclosed. The method includes: assembling a linear hearth furnace having entry and exit portions, at least a conversion zone and a fusion zone, and a moving hearth adapted to move reducible iron bearing material through the furnace on contiguous hearth sections; assembling a shrouded return substantially free of air ingress extending adjacent at least the conversion and fusion zones of the furnace through which hearth sections can move from adjacent the exit portion to adjacent the entry portion of the furnace; transferring the hearth sections from the furnace to the shrouded return adjacent the exit portion; reducing reducible material in the linear hearth furnace to metallic iron nodules; and transporting gases from at least the fusion zone to the shrouded return to heat the hearth sections while in the shrouded return.

Kiesel, Richard F; Englund, David J; Schlichting, Mark; Meehan, John; Crouch, Jeremiah; Wilson, Logan

2014-10-14T23:59:59.000Z

491

Method of forming magnetostrictive rods from rare earth-iron alloys  

DOE Patents [OSTI]

Rods of magnetostrictive alloys of iron with rare earth elements are formed by flowing a body of rare earth-iron alloy in a crucible enclosed in a chamber maintained under an inert gas atmosphere, forcing such molten rare-earth-iron alloy into a hollow mold tube of refractory material positioned with its lower end portion within the molten body by means of a pressure differential between the chamber and mold tube and maintaining a portion of the molten alloy in the crucible extending to a level above the lower end of the mold tube so that solid particles of higher melting impurities present in the alloy collect at the surface of the molten body and remain within the crucible as the rod is formed in the mold tube. 5 figs.

McMasters, O.D.

1986-09-02T23:59:59.000Z

492

Method of forming magnetostrictive rods from rare earth-iron alloys  

DOE Patents [OSTI]

Rods of magnetrostructive alloys of iron with rare earth elements are formed by flowing a body of rare earth-iron alloy in a crucible enclosed in a chamber maintained under an inert gas atmosphere, forcing such molten rare-earth-iron alloy into a hollow mold tube of refractory material positioned with its lower end portion within the molten body by means of a pressure differential between the chamber and mold tube and maintaining a portion of the molten alloy in the crucible extending to a level above the lower end of the mold tube so that solid particles of higher melting impurities present in the alloy collect at the surface of the molten body and remain within the crucible as the rod is formed in the mold tube.

McMasters, O. Dale (Ames, IA)

1986-09-02T23:59:59.000Z

493

Nitrogen-doped carbon-supported cobalt-iron oxygen reduction catalyst  

DOE Patents [OSTI]

A Fe--Co hybrid catalyst for oxygen reaction reduction was prepared by a two part process. The first part involves reacting an ethyleneamine with a cobalt-containing precursor to form a cobalt-containing complex, combining the cobalt-containing complex with an electroconductive carbon supporting material, heating the cobalt-containing complex and carbon supporting material under conditions suitable to convert the cobalt-containing complex and carbon supporting material into a cobalt-containing catalyst support. The second part of the process involves polymerizing an aniline in the presence of said cobalt-containing catalyst support and an iron-containing compound under conditions suitable to form a supported, cobalt-containing, iron-bound polyaniline species, and subjecting said supported, cobalt-containing, iron bound polyaniline species to conditions suitable for producing a Fe--Co hybrid catalyst.

Zelenay, Piotr; Wu, Gang

2014-04-29T23:59:59.000Z

494

Anaerobic Redox Cycling of Iron by Freshwater Sediment Microorganisms  

SciTech Connect (OSTI)

The potential for microbially-mediated anaerobic redox cycling of iron (Fe) was examined in a first-generation enrichment culture of freshwater wetland sediment microorganisms. MPN enumerations revealed the presence of significant populations of Fe(III)-reducing (ca. 108 cells mL-1) and Fe(II)-oxidizing, nitrate-reducing organisms (ca. 105 cells mL-1) in the sediment used to inoculate the enrichment cultures. Nitrate reduction commenced immediately following inoculation of acetate-containing (ca. 1 mM) medium with a small quantity (1% vol/vol) of wetland sediment, and resulted in the transient accumulation of NO2- and production of a mixture of end-products including NH4+. Fe(III) oxide (high surface area goethite) reduction took place - after NO3- was depleted and continued until all the acetate was utilized. Addition of NO3 after Fe(III) reduction ceased resulted in the immediate oxidation of Fe(II) coupled to reduction of + NO3-to NH4 . No significant NO2- accumulation was observed during nitrate-dependent Fe(II) oxidation. No Fe(II) oxidation occurred in pasteurized controls. Microbial community structure in the enrichment was monitored by DGGE analysis of PCR amplified 16s rDNA and RT-PCR amplified 16S rRNA, as well as by construction of 16S rDNA clone libraries for four different time points during the experiment. Strong similarities in dominant members of the microbial community were observed in the Fe(III) reduction and nitrate-dependent Fe(II) oxidation phases of the experiment, specifically the common presence of organisms closely related (= 95% sequence similarity) to the genera Geobacter and Dechloromonas. These results indicate that the wetland sediments contained organisms such as Geobacter sp. which are capable of both + dissimilatory Fe(III) reduction and oxidation of Fe(II) with reduction of NO3-reduction to NH4 . Our findings suggest that microbially-catalyzed nitrate-dependent Fe(II) oxidation has the potential to contribute to a dynamic anaerobic Fe redox cycle in freshwater sediments.

Weber, Karrie A.; Urrutia, Matilde M.; Churchill, Perry F.; Kukkadapu, Ravi K.; Roden, Eric E.

2006-01-01T23:59:59.000Z

495

Synthesis and characterisation of magnetic iron sulfide nanocrystals  

SciTech Connect (OSTI)

Fe{sub 1-x}S and Fe{sub 3}S{sub 4} nanocrystals with a variety of morphologies and average sizes were synthesised by the reaction of iron(II) acetylacetonate (Fe(acac){sub 2}) and elemental sulfur in oleylamine. Reaction at 200 Degree-Sign C for 240 min produced extremely thin Fe{sub 3}S{sub 4} sheets, which displayed low coercivities (14 kA m{sup -1}) suggestive of pseudosingle-domain or multidomain particles. Reaction temperatures {>=}300 Degree-Sign C for 30 min produced 70 nm Fe{sub 1-x}S nanocrystals with hexagonal plate and hexagonal prism morphologies, which displayed high magnetic coercivities (110 kA m{sup -1}) characteristic of single magnetic domain particles. Rapid injection of sulfur solution at 280 Degree-Sign C followed by immediate cooling produced a mixture of Fe{sub 1-x}S nanocrystals and spherical, polydisperse {approx}5 nm Fe{sub 3}S{sub 4} nanocrystals, which displayed superparamagnetism above an average blocking temperature of 55 K. - Graphical abstract: Reaction of Fe(acac){sub 2} and sulfur in oleylamine produces Fe{sub 3}S{sub 4} nanocrystals at 200 Degree-Sign C and Fe{sub 1-x}S nanocrystals at 310 Degree-Sign C. Highlights: Black-Right-Pointing-Pointer Synthesis of Fe{sub 1-x}S and Fe{sub 3}S{sub 4} nanocrystals from Fe(acac){sub 2} and sulfur. Black-Right-Pointing-Pointer Fe{sub 3}S{sub 4} sheets formed after 4 h at 200 Degree-Sign C. Black-Right-Pointing-Pointer Fe{sub 1-x}S nanocrystals formed above 200 Degree-Sign C. Black-Right-Pointing-Pointer Five nanometre Fe{sub 3}S{sub 4} formed by rapid injection. Black-Right-Pointing-Pointer Five nanometre Fe{sub 3}S{sub 4} nanocrystals superparamagnetic above blocking temperature of 55 K.

Beal, John H.L., E-mail: j.beal@irl.cri.nz [School of Chemical and Physical Sciences and MacDiarmid Institute of Advanced Materials and Nanotechnology, Victoria University of Wellington, P.O. Box 600, Wellington (New Zealand); Etchegoin, Pablo G.; Tilley, Richard D. [School of Chemical and Physical Sciences and MacDiarmid Institute of Advanced Materials and Nanotechnology, Victoria University of Wellington, P.O. Box 600, Wellington (New Zealand)

2012-05-15T23:59:59.000Z

496

Integrated nonthermal treatment system study  

SciTech Connect (OSTI)

This report presents the results of a study of nonthermal treatment technologies. The study consisted of a systematic assessment of five nonthermal treatment alternatives. The treatment alternatives consist of widely varying technologies for safely destroying the hazardous organic components, reducing the volume, and preparing for final disposal of the contact-handled mixed low-level waste (MLLW) currently stored in the US Department of Energy complex. The alternatives considered were innovative nonthermal treatments for organic liquids and sludges, process residue, soil and debris. Vacuum desorption or various washing approaches are considered for treatment of soil, residue and debris. Organic destruction methods include mediated electrochemical oxidation, catalytic wet oxidation, and acid digestion. Other methods studied included stabilization technologies and mercury separation of treatment residues. This study is a companion to the integrated thermal treatment study which examined 19 alternatives for thermal treatment of MLLW waste. The quantities and physical and chemical compositions of the input waste are based on the inventory database developed by the US Department of Energy. The Integrated Nonthermal Treatment Systems (INTS) systems were evaluated using the same waste input (2,927 pounds per hour) as the Integrated Thermal Treatment Systems (ITTS). 48 refs., 68 figs., 37 tabs.

Biagi, C.; Bahar, D.; Teheranian, B.; Vetromile, J. [Morrison Knudsen Corp. (United States); Quapp, W.J. [Nuclear Metals (United States); Bechtold, T.; Brown, B.; Schwinkendorf, W. [Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States); Swartz, G. [Swartz and Associates (United States)

1997-01-01T23:59:59.000Z

497

Iron under Earth's core conditions: Liquid-state thermodynamics and high-pressure melting curve from ab initio calculations  

E-Print Network [OSTI]

Hugoniot curves cross the melting line, and the sound speed and Gru¨neisen parameter along the HugoniotIron under Earth's core conditions: Liquid-state thermodynamics and high-pressure melting curve-augmented-wave implementation are used to calculate the free energy and a range of other thermodynamic properties of liquid iron

Alfè, Dario

498