National Library of Energy BETA

Sample records for dissolved organic carbon

  1. Hidden cycle of dissolved organic carbon in the deep ocean

    E-Print Network [OSTI]

    Repeta, Daniel J.

    Marine dissolved organic carbon (DOC) is a large (660 Pg C) reactive carbon reservoir that mediates the oceanic microbial food web and interacts with climate on both short and long timescales. Carbon isotopic content ...

  2. The dual influences of dissolved organic carbon on hypolimnetic metabolism: organic substrate and

    E-Print Network [OSTI]

    Cole, Jonathan J.

    The dual influences of dissolved organic carbon on hypolimnetic metabolism: organic substrate investigated the effect of dissolved organic carbon (DOC) on hypolimnetic metabolism (accumulation of dissolved inorganic carbon (DIC) and methane (CH4)) in 21 lakes across a gradient of DOC concentrations (308 to 1540

  3. Dissolved organic carbon export with North Pacific Intermediate Water formation

    E-Print Network [OSTI]

    Hansell, Dennis

    Dissolved organic carbon export with North Pacific Intermediate Water formation Dennis A. Hansell 2002. [1] An evaluation of DOC export with the formation of North Pacific Intermediate Water east of Japan. The new intermediate water, formed at a rate of 2­5 Sv, exports DOC at 13 ± 6 Tg DOC yr

  4. Yucca Mountain Area Saturated Zone Dissolved Organic Carbon Isotopic Data

    SciTech Connect (OSTI)

    Thomas, James; Decker, David; Patterson, Gary; Peterman, Zell; Mihevc, Todd; Larsen, Jessica; Hershey, Ronald

    2007-06-25

    Groundwater samples in the Yucca Mountain area were collected for chemical and isotopic analyses and measurements of water temperature, pH, specific conductivity, and alkalinity were obtained at the well or spring at the time of sampling. For this project, groundwater samples were analyzed for major-ion chemistry, deuterium, oxygen-18, and carbon isotopes of dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC). The U.S. Geological Survey (USGS) performed all the fieldwork on this project including measurement of water chemistry field parameters and sample collection. The major ions dissolved in the groundwater, deuterium, oxygen-18, and carbon isotopes of dissolved inorganic carbon (DIC) were analyzed by the USGS. All preparation and processing of samples for DOC carbon isotopic analyses and geochemical modeling were performed by the Desert Research Institute (DRI). Analysis of the DOC carbon dioxide gas produced at DRI to obtain carbon-13 and carbon-14 values was conducted at the University of Arizona Accelerator Facility (a NSHE Yucca Mountain project QA qualified contract facility). The major-ion chemistry, deuterium, oxygen-18, and carbon isotopes of DIC were used in geochemical modeling (NETPATH) to determine groundwater sources, flow paths, mixing, and ages. The carbon isotopes of DOC were used to calculate groundwater ages that are independent of DIC model corrected carbon-14 ages. The DIC model corrected carbon-14 calculated ages were used to evaluate groundwater travel times for mixtures of water including water beneath Yucca Mountain. When possible, groundwater travel times were calculated for groundwater flow from beneath Yucca Mountain to down gradient sample sites. DOC carbon-14 groundwater ages were also calculated for groundwaters in the Yucca Mountain area. When possible, groundwater travel times were estimated for groundwater flow from beneath Yucca Mountain to down gradient groundwater sample sites using the DOC calculated groundwater ages. The DIC calculated groundwater ages were compared with DOC calculated groundwater ages and both of these ages were compared to travel times developed in ground-water flow and transport models. If nuclear waste is stored in Yucca Mountain, the saturated zone is the final barrier against the release of radionuclides to the environment. The most recent rendition of the TSPA takes little credit for the presence of the saturated zone and is a testament to the inadequate understanding of this important barrier. If radionuclides reach the saturated zone beneath Yucca Mountain, then there is a travel time before they would leave the Yucca Mountain area and flow down gradient to the Amargosa Valley area. Knowing how long it takes groundwater in the saturated zone to flow from beneath Yucca Mountain to down gradient areas is critical information for potential radionuclide transport. Radionuclide transport in groundwater may be the quickest pathway for radionuclides in the proposed Yucca Mountain repository to reach land surface by way of groundwater pumped in Amargosa Valley. An alternative approach to ground-water flow and transport models to determine the travel time of radionuclides from beneath Yucca Mountain to down gradient areas in the saturated zone is by carbon-14 dating of both inorganic and organic carbon dissolved in the groundwater. A standard method of determining ground-water ages is to measure the carbon-13 and carbon-14 of DIC in the groundwater and then correct the measured carbon-14 along a flow path for geochemical reactions that involve carbon containing phases. These geochemical reactions are constrained by carbon-13 and isotopic fractionations. Without correcting for geochemical reactions, the ground-water ages calculated from only the differences in carbon-14 measured along a flow path (assuming the decrease in carbon-14 is due strictly to radioactive decay) could be tens of thousands of years too old. The computer program NETPATH, developed by the USGS, is the best geochemical program for correcting carbon-14 activities for geochemical r

  5. Determination of dissolved organic carbon in concentrated brine solutions

    SciTech Connect (OSTI)

    Hannaker, P.; Buchanan, A.S.

    1983-10-01

    An absolute method is reported for the determination of soluble organic carbon in concentrated brine solutions. Wet oxidation with K/sub 2/S/sub 2/O/sub 8/ is used in a sealed ampule at 130/sup 0/C, followed by hot CuO treatment of the gas stream, to fully oxidize organic species to CO/sub 2/. The CO/sub 2/ is measured gravimetrically after gas purification. Results are presented for a wide range of soluble organic species, both with and without NaCl present. This procedure now allows for the accurate determination of organic carbon in brines over a range from about 5 ppm to values in excess of 1000 ppm. The technique overcomes the difficulties of calibration curvature, catalytic clogging, and instrumental fogging, often encountered in modern instrumental methods, when applied to concentrated brine solutions. 1 figure, 3 tables.

  6. Sources and Fates of Dissolved Organic Carbon in Rural and Urban Watersheds in Brazos County, Texas 

    E-Print Network [OSTI]

    Cioce, Danielle

    2012-10-19

    The Bryan/College Station (B/CS) region has been reported to have elevated concentrations of dissolved organic carbon (DOC) in surface water. Increased DOC concentrations are worrisome as DOC has been shown to be an energy source for the recovery...

  7. Constraining the propagation of bomb-radiocarbon through the dissolved organic carbon (DOC) pool in the northeast Pacific Ocean

    E-Print Network [OSTI]

    Beaupré, Steven R; Druffel, Ellen R.M.

    2009-01-01

    dissolved organic carbon (DOC) pool in the northeast Paci?c14 C has penetrated the DOC pool to depths of Z450 m, thoughDIC) suggest that the DOC pool in the CNP contains bomb- 14

  8. Determining Sources of Dissolved Organic Carbon and Nutrients in an Urban Basin Using Novel and Traditional Methods 

    E-Print Network [OSTI]

    Govil, Krittika

    2014-01-03

    Water quality in urban ecosystems is sensitive to localized disturbances potentially affecting those mechanisms which influence nutrient cycles. The Carters Creek Basin has been reported to have elevated concentrations of dissolved organic carbon...

  9. Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin

    E-Print Network [OSTI]

    Khatiwala, Samar

    Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic December 2009 Available online 7 March 2010 Keywords: DOC CFC AOU Carbon export NADW a b s t r a c for the main thermocline and North Atlantic Deep Water (NADW) indicate a net DOC export rate of 0.081 Pg C yrŔ1

  10. Dissolved organic carbon dynamics in anaerobic sediments of the Santa Monica Basin

    E-Print Network [OSTI]

    2013-01-01

    an organic-rich coastal sediment. Geochim. Cosmochim. Actaorganic carbon in sediments from the North Carolinaexchange between deep ocean sediments and sea water. Nature

  11. Examining the coupling of carbon and nitrogen cycles in Southern Appalachian streams: Understanding the role of dissolved organic nitrogen

    SciTech Connect (OSTI)

    Lutz, Brian D [Duke University; Bernhardt, Emily [Duke University; Roberts, Brian [Louisiana Universities Marine Consortium; Mulholland, Patrick J [ORNL

    2011-01-01

    Although regional and global models of nitrogen (N) cycling typically focus on nitrate, dissolved organic nitrogen (DON) is the dominant form of nitrogen export from many watersheds and thus the dominant form of dissolved N in many streams. Our understanding of the processes controlling DON export from temperate forests is poor. In pristine systems, where biological N limitation is common, N contained in recalcitrant organic matter (OM) can dominate watershed N losses. This recalcitrant OM often has moderately constrained carbon:nitrogen (C:N) molar ratios ({approx}25-55) and therefore, greater DON losses should be observed in sites where there is greater total dissolved organic carbon (DOC) loss. In regions where anthropogenic N pollution is high, it has been suggested that increased inorganic N availability can reduce biological demand for organic N and therefore increase watershed DON losses. This would result in a positive correlation between inorganic and organic N concentrations across sites with varying N availability. In four repeated synoptic surveys of stream water chemistry from forested watersheds along an N loading gradient in the southern Appalachians, we found surprisingly little correlation between DON and DOC concentrations. Further, we found that DON concentrations were always significantly correlated with watershed N loading and stream water [NO{sub 3}{sup -}] but that the direction of this relationship was negative in three of the four surveys. The C:N molar ratio of dissolved organic matter (DOM) in streams draining watersheds with high N deposition was very high relative to other freshwaters. This finding, together with results from bioavailability assays in which we directly manipulated C and N availabilities, suggests that heterotrophic demand for labile C can increase as a result of dissolved inorganic N (DIN) loading, and that heterotrophs can preferentially remove N-rich molecules from DOM. These results are inconsistent with the two prevailing hypotheses that dominate interpretations of watershed DON loss. Therefore, we propose a new hypothesis, the indirect carbon control hypothesis, which recognizes that heterotrophic demand for N-rich DOM can keep stream water DON concentrations low when N is not limiting and heterotrophic demand for labile C is high.

  12. Seasonal changes in the age and structure of dissolved organic carbon in Siberian rivers and streams

    E-Print Network [OSTI]

    Neff, Jason

    > 100%) and pyrolysis-gas chromatography/mass spectroscopy techniques showed high concentration soils or other terrestrial sources of old, previously stabilized C. Citation: Neff, J. C., J. C. Finlay]. The resulting soil deposits contain organic carbon concentrations that average between 2­5% C with numerous

  13. Dissolved organic carbon dynamics in anaerobic sediments of the Santa Monica Basin

    E-Print Network [OSTI]

    2013-01-01

    C. (1996) Biogenic matter diagenesis on the sea ?oor: aQuanti?cation of early diagenesis: dissolved constituents inR. A. (1990) Early diagenesis and recycling of biogenic

  14. Oceanography June 200450 Colored Dissolved Organic

    E-Print Network [OSTI]

    Oregon, University of

    . Sunlight striking the ocean surface penetrates into the water column and interacts with the dissolvedOceanography June 200450 Colored Dissolved Organic in the Coastal Ocean A N O P T I C A L TO O L F usage that all three words are individu- ally synonymous for "ocean." Poems, song titles, and movies

  15. Microbial community transcriptomes reveal microbes and metabolic pathways associated with dissolved organic matter turnover in the sea

    E-Print Network [OSTI]

    McCarren, Jay

    Marine dissolved organic matter (DOM) contains as much carbon as the Earth's atmosphere, and represents a critical component of the global carbon cycle. To better define microbial processes and activities associated with ...

  16. PII S0016-7037(99)00335-X Sedimentary sources of old high molecular weight dissolved organic carbon from the ocean

    E-Print Network [OSTI]

    Guo, Laodong

    terrestrial, autochthonous, and sedimentary organic carbon seem to be too young to be responsible for the old cross-flow ultrafiltration, it can hold clues to sources and pathways of DOC turnover in the ocean compounds with varying sources (Meybeck, 1982; Thurman, 1985; Hedges et al., 1997), degradation pathways

  17. Microbial production and consumption of marine dissolved organic matter

    E-Print Network [OSTI]

    Becker, Jamie William

    2013-01-01

    Marine phytoplankton are the principal producers of oceanic dissolved organic matter (DOM), the organic substrate responsible for secondary production by heterotrophic microbes in the sea. Despite the importance of DOM in ...

  18. GEOC: Division of Geochemistry 163 -Ternary complexation of dissolved organic

    E-Print Network [OSTI]

    Sparks, Donald L.

    -Fe(III)-organic acid systems: An EXAFS spectroscopic study Author Block: Jianjun Yang1 , Donald Sparks2 , Nanthi Bolan3 of aqueous Fe(III). In this study, two common soil containing dissolved organic acids (DOA, malic and citric acids) were selected to represent DOM, and synchrotron-based Fe K-edge EXAFS was applied to characterize

  19. Organic carbon-14 in the Amazon River system

    SciTech Connect (OSTI)

    Hedges, J.I.; Ertel, J.R.; Quay, P.D.; Grootes, P.M.; Richey, J.E.; Devol, A.H.; Farwell, G.W.; Schmidt, F.W.; Salati, E.

    1986-03-07

    Coarse and fine suspended particulate organic materials and dissolved humic and fulvic acids transported by the Amazon River all contain bomb-produced carbon-14, indicating relatively rapid turnover of the parent carbon pools. However, the carbon-14 contents of these coexisting carbon forms are measurably different and may reflect varying degrees of retention by soils in the drainage basin. 20 references, 1 table.

  20. Nature and Transformation of Dissolved Organic Matter in

    E-Print Network [OSTI]

    assimilated and produced; however, little is known about the chemical nature and fate of DOM in treatment degradation of specific components of the DOM (6). Free water surface treatment wetlands consist of semiNature and Transformation of Dissolved Organic Matter in Treatment Wetlands L A R R Y B . B A R B E

  1. Rapid extraction of dissolved inorganic carbon from seawater and groundwater samples for radiocarbon dating

    E-Print Network [OSTI]

    Gospodinova, Kalina Doneva

    2012-01-01

    The focus of this thesis is the design and development of a system for rapid extraction of dissolved inorganic carbon from seawater and groundwater samples for radiocarbon dating. The Rapid Extraction of Dissolved Inorganic ...

  2. Fractionation between inorganic and organic carbon during the Lomagundi (2.222.1 Ga) carbon isotope excursion

    E-Print Network [OSTI]

    Bekker, Andrey

    is poorly characterized. Because dissolved inorganic and organic carbon reservoirs were arguably larger deposition, a carbon isotope fractionation as large as ~37 appears to characterize the production of bulk was dominated by a large dissolved inorganic carbon reservoir during the Lomagundi excursion. Our study suggests

  3. Variable C : N : P stoichiometry of dissolved organic matter cycling in the Community Earth System Model

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Letscher, R. T.; Moore, J. K.; Teng, Y. -C.; Primeau, F.

    2015-01-12

    Dissolved organic matter (DOM) plays an important role in the ocean's biological carbon pump by providing an advective/mixing pathway for ~ 20% of export production. DOM is known to have a stoichiometry depleted in nitrogen (N) and phosphorus (P) compared to the particulate organic matter pool, a fact that is often omitted from biogeochemical ocean general circulation models. However the variable C : N : P stoichiometry of DOM becomes important when quantifying carbon export from the upper ocean and linking the nutrient cycles of N and P with that of carbon. Here we utilize recent advances in DOM observationalmore »data coverage and offline tracer-modeling techniques to objectively constrain the variable production and remineralization rates of the DOM C : N : P pools in a simple biogeochemical-ocean model of DOM cycling. The optimized DOM cycling parameters are then incorporated within the Biogeochemical Elemental Cycling (BEC) component of the Community Earth System Model (CESM) and validated against the compilation of marine DOM observations. The optimized BEC simulation including variable DOM C : N : P cycling was found to better reproduce the observed DOM spatial gradients than simulations that used the canonical Redfield ratio. Global annual average export of dissolved organic C, N, and P below 100 m was found to be 2.28 Pg C yr-1 (143 Tmol C yr-1, 16.4 Tmol N yr-1, and 1 Tmol P yr-1, respectively, with an average export C : N : P stoichiometry of 225 : 19 : 1 for the semilabile (degradable) DOM pool. Dissolved organic carbon (DOC) export contributed ~ 25% of the combined organic C export to depths greater than 100 m.« less

  4. Photochemical Oxidation of Dissolved Elemental Mercury by Carbonate Radicals in Water

    SciTech Connect (OSTI)

    He, Feng; Zhao, Wenrong; Liang, Liyuan; Gu, Baohua

    2014-01-01

    Photochemical oxidation of dissolved elemental mercury [Hg(0)] affects mercury chemical speciation and its transfer at the water-air interface in the aquatic environment. The mechanisms and factors that control Hg(0) photooxidation, however, are not completely understood, especially in natural freshwaters containing dissolved organic matter (DOM) and carbonate. Here, we evaluate Hg(0) photooxidation rates affected by various reactive ionic species [e.g., DOM, HCO3-, NO3-] and free radicals in a creek water and a phosphate buffer solution (pH=8) under simulated solar irradiation. We report a high Hg(0) photooxidation rate (k = 1.44 h-1) in the presence of both HCO3- and NO3-, whereas HCO3-, NO3-, or DOM alone increased the oxidation rate slightly (k = 0.1 0.17 h-1). Using scavengers and enhancers for singlet oxygen (1O2) and hydroxyl (HO ) radicals, as well as electron paramagnetic resonance spectroscopy, we identify that carbonate radicals (CO3 -) primarily drive the Hg(0) photooxidation, whereas addition of DOM resulted in a 2-fold decrease in Hg(0) oxidation. This study identifies an unrecognized pathway of Hg(0) photooxidation by CO3 - radicals and the inhibitory effect of DOM, which could be important in assessing Hg transformation and fate in water containing carbonate such as hard water and seawater.

  5. Impact of circulation on export production, dissolved organic matter, and dissolved oxygen in the ocean: Results from Phase II of the Ocean

    E-Print Network [OSTI]

    Follows, Mick

    Impact of circulation on export production, dissolved organic matter, and dissolved oxygen; published 8 August 2007. [1] Results are presented of export production, dissolved organic matter (DOM ± 6 Pg C yrŔ1 . Model means of globally averaged particle export, the fraction of total export

  6. Variable C : N : P stoichiometry of dissolved organic matter cycling in the Community Earth System Model

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Letscher, R. T.; Moore, J. K.; Teng, Y. -C.; Primeau, F.

    2014-06-16

    Dissolved organic matter (DOM) plays an important role in the ocean's biological carbon pump by providing an advective/mixing pathway for ~ 20% of export production. DOM is known to have a stoichiometry depleted in nitrogen (N) and phosphorus (P) compared to the particulate organic matter pool, a~fact that is often omitted from biogeochemical-ocean general circulation models. However the variable C : N : P stoichiometry of DOM becomes important when quantifying carbon export from the upper ocean and linking the nutrient cycles of N and P with that of carbon. Here we utilize recent advances in DOM observational data coveragemore »and offline tracer-modeling techniques to objectively constrain the variable production and remineralization rates of the DOM C / N / P pools in a simple biogeochemical-ocean model of DOM cycling. The optimized DOM cycling parameters are then incorporated within the Biogeochemical Elemental Cycling (BEC) component of the Community Earth System Model and validated against the compilation of marine DOM observations. The optimized BEC simulation including variable DOM C : N : P cycling was found to better reproduce the observed DOM spatial gradients than simulations that used the canonical Redfield ratio. Global annual average export of dissolved organic C, N, and P below 100 m was found to be 2.28 Pg C yr-1 (143 Tmol C yr-1), 16.4 Tmol N yr-1, and 1 Tmol P yr-1, respectively with an average export C : N : P stoichiometry of 225 : 19 : 1 for the semilabile (degradable) DOM pool. DOC export contributed ~ 25% of the combined organic C export to depths greater than 100 m.« less

  7. Molecular simulation of a model of dissolved organic matter

    SciTech Connect (OSTI)

    Sutton, Rebecca; Sposito, Garrison; Diallo, Mamadou S.; Schulten,Hans-Rolf

    2004-11-08

    A series of atomistic simulations was performed to assess the ability of the Schulten dissolved organic matter (DOM) molecule, a well-established model humic molecule, to reproduce the physical and chemical behavior of natural humic substances. The unhydrated DOM molecule had a bulk density value appropriate to humic matter, but its Hildebrand solubility parameter was lower than the range of current experimental estimates. Under hydrated conditions, the DOM molecule went through conformational adjustments that resulted in disruption of intramolecular hydrogen bonds (H-bonds), although few water molecules penetrated the organic interior. The radius of gyration of the hydrated DOM molecule was similar to those measured for aquatic humic substances. To simulate humic materials under aqueous conditions with varying pH levels, carboxyl groups were deprotonated, and hydrated Na{sup +} or Ca{sup 2+} were added to balance the resulting negative charge. Because of intrusion of the cation hydrates, the model metal- humic structures were more porous, had greater solvent-accessible surface areas, and formed more H-bonds with water than the protonated, hydrated DOM molecule. Relative to Na{sup +}, Ca{sup 2+} was both more strongly bound to carboxylate groups and more fully hydrated. This difference was attributed to the higher charge of the divalent cation. The Ca-DOM hydrate, however, featured fewer H-bonds than the Na-DOM hydrate, perhaps because of the reduced orientational freedom of organic moieties and water molecules imposed by Ca{sup 2+}. The present work is, to our knowledge, the first rigorous computational exploration regarding the behavior of a model humic molecule under a range of physical conditions typical of soil and water systems.

  8. Dissolved inorganic carbon in soil and shallow groundwater, Konza Prairie LTER Site, NE Kanas, USA

    E-Print Network [OSTI]

    Tsypin, Mikhail

    2011-12-31

    Sources and seasonal trends of dissolved inorganic carbon (DIC) in a shallow limestone aquifer were studied for 1 year at the Konza Prairie LTER (Long-Term Ecological Research) Site in northeastern Kansas, from spring 2010 to spring 2011. Annual...

  9. Impact of Benthic Algae on Dissolved Organic Nitrogen in a Temperate, Coastal Lagoon

    E-Print Network [OSTI]

    Lawrence, Deborah

    Impact of Benthic Algae on Dissolved Organic Nitrogen in a Temperate, Coastal Lagoon Anna Christina-released to the water column on short time scales (minutes-hours). Benthic algae thus clearly influence benthic Introduction: Impact of benthic algae on dissolved organic nitrogen dynamics in temperate, coastal lagoons

  10. Closely related phytoplankton species produce similar suites of dissolved organic matter

    E-Print Network [OSTI]

    Becker, Jamie William

    Production of dissolved organic matter (DOM) by marine phytoplankton supplies the majority of organic substrate consumed by heterotrophic bacterioplankton in the sea. This production and subsequent consumption converts a ...

  11. Approaches to mitigate the impact of dissolved organic matter on the adsorption of synthetic organic contaminants by porous carbonaceous sorbents

    SciTech Connect (OSTI)

    Yanping Guo; Abhishek Yadav; Tanju Karanfil [Clemson University, Anderson, SC (United States). Department of Environmental Engineering and Earth Sciences

    2007-11-15

    Adsorption of trichloroethylene (TCE) and atrazine, two synthetic organic contaminants (SOCs) having different optimum adsorption pore regions, by four activated carbons and an activated carbon fiber (ACF) was examined. Adsorbents included two coconut-shell based granular activated carbons (GACs), two coal-based GACs (F400 and HD4000) and a phenol formaldehyde-based activated carbon fiber. The selected adsorbents had a wide range of pore size distributions but similar surface acidity and hydrophobicity. Single solute and preloading (with a dissolved organic matter (DOM)) isotherms were performed. Single solute adsorption results showed that (i) the adsorbents having higher amounts of pores with sizes about the dimensions of the adsorbate molecules exhibited higher uptakes, (ii) there were some pore structure characteristics, which were not completely captured by pore size distribution analysis, that also affected the adsorption, and (iii) the BET surface area and total pore volume were not the primary factors controlling the adsorption of SOCs. The preloading isotherm results showed that for TCE adsorbing primarily in pores <10 {angstrom}, the highly microporous ACF and GACs, acting like molecular sieves, exhibited the highest uptakes. For atrazine with an optimum adsorption pore region of 10-20 {angstrom}, which overlaps with the adsorption region of some DOM components, the GACs with a broad pore size distribution and high pore volumes in the 10-20 {angstrom} region had the least impact of DOM on the adsorption. 25 refs., 3 figs., 3 tabs.

  12. TOC Total organic carbon MBC Microbial biomass carbon

    E-Print Network [OSTI]

    Virginia Tech

    C Carbon TOC Total organic carbon MBC Microbial biomass carbon Active C Pool Indicated by Light, the relationship between carbon dynamics including total organic carbon (TOC) storage, microbial biomass carbon and microbial biomass carbon in subsoil 4 years after rehabilitation · Microbial biomass carbon had a positive

  13. Microbial dissolved organic phosphorus utilization in the Hudson River Estuary

    SciTech Connect (OSTI)

    Ammerman, J.W. (Texas A M Univ., College Station (United States)); Angel, D.L. (City College of New York, NY (United States))

    1990-01-09

    The Hudson River Estuary has large inputs of phosphorus and other nutrients from sewage discharge. Concentrations of soluble reactive phosphorus (SRP) reach at least 4 uM during the summer low-flow period. Biological utilization of phosphorus and other nutrients is usually minimal because of the high turbidity and short residence time of the water. Therefore SRP is normally a conservative tracer of salinity, with maximum concentrations found off Manhattan and decreasing to the north. Despite this abundance of SRP, some components of the dissolved organic phosphorus (DOP) appear to be rapidly cycled by microbes. The objective of this study was to measure this DIP cycling during both the high- and low-flow periods. We measured the concentrations of SRP and DOP, the SRP turnover rate, algal and bacterial biomass, and the substrate turnover rates of two microbial cell-surface phosphatases, alkaline phosphatase (AP) and 5[prime] - nucleotidase (5PN). SRP concentrations ranged from about 0.5-4 uM, DOP was usually less than 1 uM. SRP and AP turnover were slow (generally < 5%/h), but 5PN substrate turnover was high with a median rate of 100%/h. Furthermore, over 30% of the phosphate hydrolyzed by 5PN was immediately taken up. If the nucleotide-P concentration is conservatively assumed to be 5 nM, than the rate of phosphate utilization from DOP is nearly equal to that from SRP. That is paradoxical considering the large SRP concentration, but suggests that much of this SRP may be biologically unavailable due to complexation with iron or other processes.

  14. Aged black carbon identified in marine dissolved organic carbon

    E-Print Network [OSTI]

    Ziolkowski, Lori A; Druffel, Ellen R.M.

    2010-01-01

    pool in the northeast Pacific Ocean, Deep Sea Res. , Part I,?445‰ in the deep NE Pacific Ocean (Table S1). The Suwanneein the northeast Pacific Ocean. If the BC in the Amazon

  15. STUDIES ON THE USE OF CARBON DIOXIDE DISSOLVED IN REFRIGERATED BRINE FOR THE PRESERVATION OF WHOLE FISH

    E-Print Network [OSTI]

    STUDIES ON THE USE OF CARBON DIOXIDE DISSOLVED IN REFRIGERATED BRINE FOR THE PRESERVATION OF WHOLE in rockfish and chum salmon of dissolving carbon dioxide in brine. Storing the fish in the refrigerated brine treated with carbon dioxide inhibited the growth of the bacteria, retarded the rate at which the fish

  16. An assessment of remote sensing algorithms for colored dissolved organic matter in complex freshwater environments

    E-Print Network [OSTI]

    Yu, Qian

    An assessment of remote sensing algorithms for colored dissolved organic matter in complex October 2013 Accepted 12 October 2013 Available online xxxx Keywords: CDOM Algorithm Freshwater environments Saginaw River Lake Huron This study evaluated fifteen algorithms representing four major

  17. Direct and indirect photoreactions of chromophoric dissolved organic matter : roles of reactive oxygen species and iron

    E-Print Network [OSTI]

    Goldstone, Jared Verrill, 1971-

    2002-01-01

    Photochemical transformations of chromophoric dissolved organic matter (CDOM) are one of the principal processes controlling its fate in coastal waters. The photochemical decomposition of CDOM leads to the formation of a ...

  18. Chemical characterization of dissolved organic matter (DOM) in seawater : structure, cycling, and the role of biology

    E-Print Network [OSTI]

    Quan, Tracy M. (Tracy Michelle), 1977-

    2005-01-01

    The goal of this thesis is to investigate three different areas relating to the characterization of dissolved organic matter (DOM): further determination of the chemical compounds present in high molecular weight DOM ...

  19. Evaluating the origins and transformations of organic matter and dissolved inorganic nitrogen in two contrasting North Sea estuaries 

    E-Print Network [OSTI]

    Ahad, Jason Michael Elias

    In order to delineate the potential sources and to understand the main controls on the biogeochemical cycling of dissolved and particulate organic matter (DOM, POM) and dissolved inorganic nitrogen (DIN) during estuarine ...

  20. Effects of Dissolved Carbonate on Arsenate Adsorption and Surface

    E-Print Network [OSTI]

    Sparks, Donald L.

    kinetics, pseudo-equilibrium adsorption/titration experiments, extended X-ray absorption fine structure(V) adsorption. As(V) adsorption kinetics [4 g L-1, [As(V)]0 ) 1.5 mM and I ) 0.01 M NaCl] showed carbonate metalloid in oxic-reduced terrestrial/ aquatic environments derived from indigenous sources (e

  1. Organic carbon burial forcing of the carbon cycle from

    E-Print Network [OSTI]

    Derry, Louis A.

    Organic carbon burial forcing of the carbon cycle from Himalayan erosion Christian France . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Weathering and erosion can affect the long-term ocean­atmo- sphere budget of carbon dioxide both through of Neogene Himalayan erosion on the carbon cycle is an increase in the amount of organic carbon

  2. Introduction It is well established that dissolved organic matter (DOM)

    E-Print Network [OSTI]

    Boss, Emmanuel S.

    weeks or more, with the frequency and duration limited only by power consumption and data storage in biogeochemical processes: it supplies energy to heterotrophic organisms, binds metals and pesti- cides, affects may rapidly change in response to aperiodic as well as periodic physi- cal and biological forcing

  3. A simple method for the removal of dissolved organic matter and N analysis of NO3

    E-Print Network [OSTI]

    Gilli, Adrian

    ,11] or by the stepwise reduction of nitrate to nitrous oxide gas (N2O) by bacteria[12,13] or by using cadmium or sodium in nitrate (NO3 ­ ) are frequently used to identify nitrate sources and to study nitrogen (N) transformation, and dissolved organic matter (DOM) can interfere with the d15 N signature of nitrate. We therefore have

  4. Biogeochemical and hydrographic controls on chromophoric dissolved organic matter distribution in the Pacific Ocean

    E-Print Network [OSTI]

    Siegel, David A.

    in the Pacific Ocean Chantal M. Swan a,Ă, David A. Siegel a,b , Norman B. Nelson a , Craig A. Carlson c , Elora Available online 19 September 2009 Keywords: CDOM AOU Pacific Water masses Hydrography Bio-optical a b s t r a c t Recent in situ observations of chromophoric dissolved organic material (CDOM) in the Pacific

  5. Variation in the availability and utilization of dissolved organic nitrogen by the smooth cordgrass, Spartina alterniflora

    E-Print Network [OSTI]

    Lawrence, Deborah

    Variation in the availability and utilization of dissolved organic nitrogen by the smooth cordgrass to be an important source of nitrogen (N) for S. alterniflora, however, little is known about the availability in the availability and utilization of DON, (2) investigate seasonal variation in DON availability, (3) determine

  6. 5, 11391174, 2008 Organic carbon and

    E-Print Network [OSTI]

    Boyer, Edmond

    BGD 5, 1139­1174, 2008 Organic carbon and nutrient export from disturbed peatlands S. Waldron et al of Biogeosciences The significance of organic carbon and nutrient export from peatland-dominated landscapes subject Union. 1139 #12;BGD 5, 1139­1174, 2008 Organic carbon and nutrient export from disturbed peatlands S

  7. Differential Support of Lake Food Webs by Three Types of Terrestrial Organic Carbon ELE 00670-2005 Revision

    E-Print Network [OSTI]

    Notre Dame, University of

    of dissolved inorganic 13 C were made to reveal the pathways of subsidies to lakes from terrestrial dissolved pathway. Terrestrial POC significantly subsidized the production of both zooplankton and benthic1 Differential Support of Lake Food Webs by Three Types of Terrestrial Organic Carbon ELE 00670

  8. Photochemical and microbial degradation of dissolved lignin phenols: Implications for the fate of terrigenous dissolved organic matter in

    E-Print Network [OSTI]

    Hernes, Peter J.

    Photochemical and microbial degradation of dissolved lignin phenols: Implications for the fate phenols. A 10-day incubation experiment with plume water indicated rates of microbial degradation the impact of various removal mechanisms (photooxidation, microbial degradation, and flocculation

  9. Steady-state diagenetic model for dissolved carbonate species and pH in the pore waters of oxic and suboxic sediments

    SciTech Connect (OSTI)

    Boudreau, B.P.

    1987-07-01

    An open-system diagenetic (transport) model is presented which accounts for the concurrent behavior of all the dissolved carbonate species as well as hydrogen and hydroxyl ions in the pore waters of marine sediments during the oxic and suboxic decay of organic-matter. The model includes interconversion between the dissolved carbonate species due to associationdissociation reactions as well as production by organic decay and CaCO/sub 3/ dissolution. The existence of rapid associationdissociation reactions has important consequences. First, the transport of a dissolved carbonate species is facilitated, because it can react and diffuse as another carbonate species. This action modifies the concentration profiles which would be expected without interconversion. As a consequence, the rate of CaCO/sub 3/ dissolution is increased because it is more difficult for CO/sub 3//sup =/ to reach and maintain the saturation concentration. Finally, CO/sub 2/(aq) and HCO/sub 3//sup -/ produced by decay affect the concentration of CO/sub 3//sup =/ and, therefore, the saturation state of pore waters with respect to carbonate minerals. The model is applied to the carbonate alkalinity and pH data from the Guatemala Basin and MANOP Site C. The model reproduces the sharp near-surface minimum in pH, observed at the Guatemala Basin sites; however, the carbonate alkalinity increase is underpredicted. This model result implies that there is an additional source of HCO/sub 3//sup -/ that is not presently recognized, probably in the form of sulfate reduction at depth.

  10. Subsurface Monitor for Dissolved Inorganic Carbon at Geological Sequestration Site Phase 1 SBIR Final Report

    SciTech Connect (OSTI)

    Sheng Wu

    2012-08-03

    Phase I research of this SBIR contract has yielded anticipated results and enable us to develop a practical new instrument to measure the Dissolved Inorganic Carbons (DIC) as well as Supercritical (SC) CO2 in underground brine water at higher sensitivity, lower cost, higher frequency and longer period of time for the Monitoring, Verification & Accounting (MVA) of CO2 sequestration as well as Enhanced Oil Recovery (EOR). We show that reduced cost and improved performance are possible; both future and emerging market exist for the proposed new instrument.

  11. Dissolved Organic Carbon Concentrations and Compositions, and Trihalomethane Formation

    E-Print Network [OSTI]

    in Waters from Agricultural Peat Soils, Sacramento-San Joaquin Delta, California: Implications for Drinking SURVEY Water-Resources Investigations Report 98­4147 Prepared in cooperation with the California Department of Water Resources 6217-37 Sacramento, California 1998 #12;U.S. DEPARTMENT OF THE INTERIOR BRUCE

  12. Radiocarbon in dissolved organic carbon of the South Pacific Ocean

    E-Print Network [OSTI]

    Druffel, ERM; Griffin, S

    2015-01-01

    G. Ostlund (1983), Abyssal water C distribution and the agenorthward transport of deep waters, indicating that the deepof Lower Circumpolar Deep Water. This presents a conundrum

  13. COMPARISON OF THE FATE OF DISSOLVED ORGANIC MATTER IN TWO COASTAL SYSTEMS: HOG ISLAND BAY, VA (USA)

    E-Print Network [OSTI]

    Lawrence, Deborah

    COMPARISON OF THE FATE OF DISSOLVED ORGANIC MATTER IN TWO COASTAL SYSTEMS: HOG ISLAND BAY, VA (USA) AND PLUM ISLAND SOUND, MA (USA) A Thesis Presented to The Faculty of the School of Marine Science............................... 55 DISCUSSION ................................................................... 57 Plum Island

  14. Differential support of lake food webs by three types of terrestrial organic carbon

    E-Print Network [OSTI]

    Cole, Jonathan J.

    from the t-DOC to bacteria pathway. Terrestrial POC significantly subsidized the production of bothLETTER Differential support of lake food webs by three types of terrestrial organic carbon Jonathan whole-lake additions of dissolved inorganic 13 C were made to reveal the pathways of subsidies to lakes

  15. Carbon Mineralization and Labile Organic Carbon Pools in the Sandy

    E-Print Network [OSTI]

    Grunwald, Sabine

    Carbon Mineralization and Labile Organic Carbon Pools in the Sandy Soils of a North Florida mineralization were best explained by TOC (62%) and hot-water- extractable C (59%), whereas acid-hydrolyzable C mineralization and clay content were directly linearly correlated, indicating a possible stimulatory effect

  16. Worldwide organic soil carbon and nitrogen data

    SciTech Connect (OSTI)

    Zinke, P.J.; Stangenberger, A.G.; Post, W.M.; Emanual, W.R.; Olson, J.S.

    1986-09-01

    The objective of the research presented in this package was to identify data that could be used to estimate the size of the soil organic carbon pool under relatively undisturbed soil conditions. A subset of the data can be used to estimate amounts of soil carbon storage at equilibrium with natural soil-forming factors. The magnitude of soil properties so defined is a resulting nonequilibrium values for carbon storage. Variation in these values is due to differences in local and geographic soil-forming factors. Therefore, information is included on location, soil nitrogen content, climate, and vegetation along with carbon density and variation.

  17. The effect of surface irradiance on the absorption spectrum of chromophoric dissolved organic matter in the global ocean

    E-Print Network [OSTI]

    Siegel, David A.

    The effect of surface irradiance on the absorption spectrum of chromophoric dissolved organic 2012 Keywords: Marine CDOM Solar irradiation Surface Photobleaching Photoproduction a b s t r a c Oceans were irradiated over several days with full-spectrum light under a solar simulator at in situ

  18. PAPER www.rsc.org/pps | Photochemical & Photobiological Sciences Alteration of chromophoric dissolved organic matter by solar UV radiation

    E-Print Network [OSTI]

    Sommaruga, Ruben

    dissolved organic matter by solar UV radiation causes rapid changes in bacterial community composition of the lagoon was exposed to different regions of the solar spectrum (full solar radiation, UV-A + PAR, PAR increases significantly after exposure of CDOM to solar radiation.4,9,10,11­13 This increase in bacterial

  19. Optimizing Carbon Nanotube Contacts for Use in Organic Photovoltaics: Preprint

    SciTech Connect (OSTI)

    Barnes, T. M.; Blackburn, J. L.; Tenent, R. C.; Morfa, A.; Heben, M.; Coutts, T. J.

    2008-05-01

    This report describes research on optimizing carbon nanotube networks for use as transparent electrical contacts (TCs) in organic photovoltaics (OPV).

  20. Research Article Connecting Soil Organic Carbon and Root Biomass with

    E-Print Network [OSTI]

    Debinski, Diane M.

    of Earth's terrestrial organic carbon but are sensitive to land-use. Rangelands are important to carbon. Introduction Soils constitute the greatest stock of terrestrial organic carbon [1] and soil properties can major pathways of organic matter input--root tissue and exudates--directly involve plants [22]. Roots

  1. The effect of mean cell residence time on the adsorbability of dissolved organic compounds found in petrochemical wastewaters 

    E-Print Network [OSTI]

    Johnson, Timothy Loring

    1979-01-01

    , each with a different mean cell residence time, biologically treated the waste- water. Follow1ng biolog1cal treatment, the wastewater was subjected to activated carbon adsorption treatment. The Freundlich isotherm, non-adsorbable organic compound... concen- trations and carbon dosage requ1rements were used to evaluate the re- sults of the carbon adsorpt1on treatments. The type and particle size of the carbon used rema1ned constant throughout the study. Any changes 1n the act1vated carbons adsorpt...

  2. Oxidation of atmospheric organic carbon : interconnecting volatile organic compounds, intermediate-volatility organic compounds, and organic aerosol

    E-Print Network [OSTI]

    Hunter, James Freeman

    2015-01-01

    .Organic molecules have many important roles in the atmosphere, acting as climate and biogeochemical forcers, and in some cases as toxic pollutants. The lifecycle of atmospheric organic carbon is extremely complex, with ...

  3. Soil Organic Carbon Degradation, Barrow, 2013-2014

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Gu, Baohua; Yang, Ziming

    2015-03-30

    This dataset provides information about soil organic carbon decomposition in Barrow soil incubation studies. The soil cores were collected from low-center polygon (Area A) and were incubated in the laboratory at different temperatures for up to 60 days. Transformations of soil organic carbon were characterized by UV and FT-IR, and small organic acids in water-soluble carbons were quantified by ion chromatography during the incubation

  4. Soil Organic Carbon Degradation, Barrow, 2013-2014

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Gu, Baohua; Yang, Ziming

    This dataset provides information about soil organic carbon decomposition in Barrow soil incubation studies. The soil cores were collected from low-center polygon (Area A) and were incubated in the laboratory at different temperatures for up to 60 days. Transformations of soil organic carbon were characterized by UV and FT-IR, and small organic acids in water-soluble carbons were quantified by ion chromatography during the incubation

  5. The role of various dissolved organic matter forms on chlorpyrifos bioavailability

    E-Print Network [OSTI]

    Decho, Alan

    microenvironment that facilitates the binding of highly hydrophobic organic contaminants. DOM properties such as organic car- bon content, abundance of hydrophobic and polar macromolecules, organic mat- ter composition of many contaminants potentially reducing their bio- availability and toxicity to marine and estuarine

  6. GEOCHEMISTRY OF PARTICULATE AND DISSOLVED INORGANIC CARBON IN THE CENTRAL NORTH PACIFIC

    E-Print Network [OSTI]

    Luther, Douglas S.

    -carbonate system of the open ocean is still not completely understood today. This investigation incorporated both for 15 months at the Hawaii Ocean Time-series station, ALOHA, was predominantly controlled waters are a very small sink for anthropogenic CO2, this CO2 has penetrated to a depth of 700 m

  7. A model for remote estimation of ultraviolet absorption by chromophoric dissolved organic matter based on the global

    E-Print Network [OSTI]

    Siegel, David A.

    climate. These include photo- and biogeochemical cycling of organic material, release of sulfur and carbon of photo- chemical rate processes and CDOM cycling in the open ocean due to its simplicity and optimization to be critical for determining visible light abso

  8. Researchers question published no-till soil organic carbon sequestration rates | EurekAlert ...

    E-Print Network [OSTI]

    ... published no-till soil organic carbon sequestration rates ... researchers have published soil organic carbon sequestration rates. Many of the ... have suggested that soil organic carbon can be sequestered by simply ...

  9. Organic Light-Emitting Diodes Having Carbon Nanotube Anodes

    E-Print Network [OSTI]

    Gruner, George

    , flexible anodes for organic light-emitting diodes (OLEDs). For polymer-based OLEDs having the structure applications. Polymer and small molecule-based organic light-emitting diodes (OLEDs) are rapidly approachingOrganic Light-Emitting Diodes Having Carbon Nanotube Anodes Jianfeng Li, Liangbing Hu, Lian Wang

  10. Carbon isotope ratios of organic compound fractions in oceanic suspended particles

    E-Print Network [OSTI]

    Hwang, Jeomshik; Druffel, Ellen R. M

    2006-01-01

    Radiocarbon evidence of fossil-carbon cycling in sediments1968), Metabolic fractionation of carbon isotopes in marineof particulate organic carbon using bomb 14 C, Nature,

  11. Challenges for improving estimates of soil organic carbon stored...

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

    Challenges for improving estimates of soil organic carbon stored in permafrost regions September 30, 2013 Tweet EmailPrint One of the greatest environmental challenges of the 21st...

  12. Carbon aging mechanisms and effects on retention of organic iodides

    SciTech Connect (OSTI)

    Hyder, M.L.

    1985-01-01

    The activated carbon used to treat the off-gas from the Savannah River Plant prodution reactor building was studied to determine the chemical changes occurring in this carbon during its service life. The carbon is a coconut-shell charcoal impregnated with 1% triethylenediamine (TEDA) and 2% KI. It was known that during its 30-month service life the carbon becomes more acidic and less effective for retaining iodine in organic form. The study showed that the most important change occurring in the carbon is the reaction of KI to give other chemical forms of iodine. The reacted iodine is unavailable for exchange with alkyl iodides. The results suggest that the carbon reacts with KI to form organic compounds, but small amounts of oxidized iodine may also be presnt. There is also evidence that some iodide is lost from the carbon altogether. The TEDA impregnant is lost from the carbon very quickly, and has no importance after a few months. The specific reactions by which the impregnant is lost have not been identified. However, mathematical analysis shows that the carbon performance data are consistent with the reaction of iodide impregnant with impurities in the air flowing through the carbon bed. Additional mathematical analysis, based on electron microscopic observation of the carbon particles, indicates that the external surfaces of the carbon are mainly responsible for their effectiveness in retaining iodine. Consequently, the condition of the impregnants on a relatively small fraction of the carbon surface can have a large effect on its performance. 4 refs., 14 figs., 2 tabs.

  13. Characterization of Siberian Arctic coastal sediments: Implications for terrestrial organic carbon export

    E-Print Network [OSTI]

    Guo, Laodong

    pyrolysis-GC/MS of the sedimentary organic carbon (SOC) indicated an increase in the freshness for carbon. As such, large quantities of soil organic carbon are stored in the region. It is estimated

  14. Management effects on labile organic carbon pools 

    E-Print Network [OSTI]

    Kolodziej, Scott Michael

    2005-08-29

    Experimental Farm near College Station, TX prompted us to examine the effects of tillage and rotation on soil organic C (SOC), soil microbial biomass C (SMBC), 38-day cumulative C mineralization (38-day CMIN), hot-water extractable organic C (hot...

  15. Role of discrete landscape units in controlling catchment dissolved organic carbon dynamics

    E-Print Network [OSTI]

    McDonnell, Jeffrey J.

    responsive, steep, wet catchments located on the west coast of the South Island of New Zealand. Specifically, 1981] and control the solubility, trans- port, and toxicity of metals [Reuter and Perdue, 1977

  16. Sorption of organic carbon compounds to the fine fraction of surface and Subsurface Soils

    SciTech Connect (OSTI)

    Jagadamma, Sindhu [ORNL; Mayes, Melanie [ORNL; Zinn, Yuri [Federal University of Lavras, Brazil; Gisladottir, Gudrun [University of Iceland; Ann, Russell [Iowa State University

    2014-01-01

    Dissolved organic carbon (DOC) transported from the soil surface is stabilized in deeper soil profiles by physicochemical sorption processes. However, it is unclear how different forms of organic carbon (OC) compounds common in soil organic matter interact with soil minerals in the surface (A) and subsurface (B) horizons. We added four compounds (glucose, starch, cinnamic acid and stearic acid) to the silt- and clay-sized fraction (fine fraction) of A and B horizons of eight soils from varying climates (3 temperate, 3 tropical, 1 arctic and 1 sub-arctic). Equilibriumbatch experiments were conducted using 0 to 100 mg C L 1 of 14C-labeled compounds for 8 h. Sorption parameters (maximum sorption capacity, Qmax and binding coefficient, k) calculated by fitting sorption data to the Langmuir equation showed that Qmax of A and B horizons was very similar for all compounds. Both Qmax and k values were related to sorbate properties, with Qmax being lowest for glucose (20 500 mg kg 1), highest for stearic acid (20,000 200,000 mg kg 1), and intermediate for both cinnamic acid (200 4000 mg kg 1) and starch (400 6000 mg kg 1). Simple linear regression analysis revealed that physicochemical properties of the sorbents influenced the Qmax of cinnamic acid and stearic acid, but not glucose and starch. The sorbent properties did not show predictive ability for binding coefficient k. By using the fine fraction as sorbent, we found that the mineral fractions of A horizons are equally reactive as the B horizons irrespective of soil organic carbon content.

  17. Glossary of Volatile Organic Compounds Ethylbenzene Carbon tetrachloride

    E-Print Network [OSTI]

    Glossary of Volatile Organic Compounds · Ethylbenzene · Carbon tetrachloride · Benzene · 1 and petroleum. It is also found in manufactured products such as inks, insecticides, and paints. Ethylbenzene, carpet glues, varnishes and paints, and use of tobacco. Some people are exposed to ethylbenzene at work

  18. Fates of Eroded Soil Organic Carbon: Mississippi Basin Case Study

    E-Print Network [OSTI]

    Smith, S. V.; Sleezer, R. O.; Renwick, W. H.; Buddemeier, Robert W.

    2005-01-01

    We have developed a mass balance analysis of organic carbon (OC) across the five major river subsystems of the Mississippi (MS) Basin (an area of 3.2 3 106 km2). This largely agricultural landscape undergoes a bulk soil erosion rate of ;480 t·km22...

  19. Version 3.0 SOP 2 --Total dissolved inorganic carbon October 12, 2007 Page 1 of 14

    E-Print Network [OSTI]

    carbon Version 3.0 Page 2 of 14 The hydroxide ions used are generated at the cathode by electrolyzing

  20. Theoretical constraints on the effects of pH, salinity, and temperature on clumped isotope signatures of dissolved inorganic carbon species and precipitating carbonate minerals

    E-Print Network [OSTI]

    Hill, PS; Tripati, AK; Schauble, EA

    2014-01-01

    bonds in carbonate minerals: a new kind of paleothermometer.species and carbonate minerals. J. Phys. Chem. A 112, 542–Fe2+(aq) with carbonate minerals. Geochim. Cosmochim. Acta

  1. Highly dispersed carbon nanotubes in organic media for polymer:fullerene photovoltaic devices

    E-Print Network [OSTI]

    Hong, Soon Hyung

    Highly dispersed carbon nanotubes in organic media for polymer:fullerene photovoltaic devices Gwang photovoltaic device are fabricated using homogeneously dispersed carbon nanotubes (CNTs) in a polymer. All rights reserved. 1. Introduction Organic photovoltaic (OPV) materials promise the production

  2. Soil organic carbon sequestration potential of cropland in China Zhangcai Qin,1,2

    E-Print Network [OSTI]

    Pittendrigh, Barry

    Soil organic carbon sequestration potential of cropland in China Zhangcai Qin,1,2 Yao Huang,1), Soil organic carbon sequestration potential of cropland in China, Global Biogeochem. Cycles, 27, doi:10 carbon (SOC) in cropland is of great importance to the global carbon (C) balance and to agricultural

  3. Dissolved Organic Carbon (DOC) Production from Cultivated Organic Soils on Twitchell Island, Sacramento - San Joaquin Delta, California

    E-Print Network [OSTI]

    Tanji, Kenneth K; Chow, Alex T; Gao, Suduan

    1999-01-01

    Quaternary evolution of the Sacramento-San Joaquin Delta,1935. Soil survey of the Sacramento-San Joaquin Delta area,Formation potential in the Sacramento-San Joaquin Delta

  4. Carbon-catalyzed gasification of organic feedstocks in supercritical water

    SciTech Connect (OSTI)

    Xu, X.; Matsumura, Y.; Stenberg, J.; Antal, M.J. Jr. [Univ. of Hawaii, Honolulu, HI (United States). Hawaii Natural Energy Inst.] [Univ. of Hawaii, Honolulu, HI (United States). Hawaii Natural Energy Inst.

    1996-08-01

    Spruce wood charcoal, macadamia shell charcoal, coal activated carbon, and coconut shell activated carbon catalyze the gasification of organic compounds in supercritical water. Feedstocks studied in this paper include glycerol, glucose, cellobiose, whole biomass feedstocks (depithed bagasse liquid extract and sewage sludge), and representative Department of Defense (DoD) wastes (methanol, methyl ethyl ketone, ethylene glycol, acetic acid, and phenol). The effects of temperature, pressure, reactant concentration, weight hourly space velocity, and the type of catalyst on the gasification of glucose are reported. Complete conversion of glucose (22% by weight in water) to a hydrogen-rich synthesis gas was realized at a weight hourly space velocity (WHSV) of 22.2 h{sup {minus}1} in supercritical water at 600 C, 34.5 MPa. Complete conversions of the whole biomass feeds were also achieved at the same temperature and pressure. The destruction efficiencies for the representative DoD wastes were also high. Deactivation of the carbon catalyst was observed after 4 h of operation without swirl in the entrance region of the reactor, but the carbon gasification efficiency remained near 100% for more than 6 h when a swirl generator was employed in the entrance of the reactor.

  5. Organized Research Unit (ORU) on Carbon Capture and Sequestration: Meeting the Needs of the Energy Sector

    E-Print Network [OSTI]

    Zhou, Chongwu

    Organized Research Unit (ORU) on Carbon Capture and Sequestration: Meeting the Needs of the Energy of an Organized Research Unit (ORU) on Carbon Capture and Sequestration (CCS). The purpose of this effort Frontier Research Center proposal: "Integrated Science of Geological Carbon Sequestration" to BES office

  6. Master/Diploma project Degradation of carbon dioxide by micro organisms

    E-Print Network [OSTI]

    Wolkenhauer, Olaf

    Master/Diploma project Degradation of carbon dioxide by micro organisms The accumulation of carbon of the carbon dioxide release is an important objective in the near future. Various strategies are discussed or storage of produced carbon dioxide. Unfortunately, applications based on fossil fuels cannot be improved

  7. Interaction effects of climate and land use/land cover change on soil organic carbon sequestration

    E-Print Network [OSTI]

    Grunwald, Sabine

    Interaction effects of climate and land use/land cover change on soil organic carbon sequestration carbon sequestration Climate change Soil carbon change Historically, Florida soils stored the largest in Florida (FL) have acted as a sink for carbon (C) over the last 40 years. · Climate interacting with land

  8. REMOVAL OF ORGANIC POLLUTANTS FROM SUBCRITICAL WATER WITH ACTIVATED CARBON

    SciTech Connect (OSTI)

    Steven B. Hawthorne; Arnaud J. Lagadec

    1999-08-01

    The Energy & Environmental Research Center (EERC) has demonstrated that controlling the temperature (and to a lesser extent, the pressure) of water can dramatically change its ability to extract organics and inorganics from matrices ranging from soils and sediments to waste sludges and coal. The dielectric constant of water can be changed from about 80 (a very polar solvent) to <5 (similar to a nonpolar organic solvent) by controlling the temperature (from ambient to about 400 C) and pressure (from about 5 to 350 bar). The EERC has shown that hazardous organic pollutants such as pesticides, PACS (polycyclic aromatic hydrocarbons), and PCBs (polychlorinated biphenyls) can be completely removed from soils, sludges, and sediments at temperatures (250 C) and pressures (<50 atm) that are much milder than typically used for supercritical water processes (temperature >374 C, pressure >221 atm). In addition, the process has been demonstrated to be particularly effective for samples containing very high levels of contaminants (e.g., part per thousand). Current projects include demonstrating the subcritical water remediation process at the pilot scale using an 8-liter system constructed under separate funding during 1997. To date, subcritical water has been shown to be an effective extraction fluid for removing a variety of organic pollutants from soils and sludges contaminated with fossil fuel products and waste products, including PACS from soil (e.g., town gas sites), refining catalysts, and petroleum tank bottom sludges; PCBs from soil and sediments; toxic gasoline components (e.g., benzene) from soil and waste sludge; and phenols from petroleum refinery sludges. The obvious need to clean the wastewater from subcritical water processes led to preliminary experiments with activated carbon placed in line after the extractor. Initial experiments were performed before and after cooling the extractant water (e.g., with water at 200 C and with water cooled to 25 C). Surprisingly, the ability of activated carbon to remove organics from the water is better at a high temperature than at room temperature. These initial results are opposite to those expected from chromatographic theory, since the solubility of the organics is about 100,000-fold higher in the hot water than in ambient water. At present, the physicochemical mechanism accounting for these results is unknown; however, it is possible that the lower surface tension and lower viscosity of subcritical water (compared to water at ambient conditions) greatly increases the available area of the carbon by several orders of magnitude. Regardless of the mechanism involved, the optimal use of activated carbon to clean the wastewater generated from subcritical water remediation will depend on obtaining a better understanding of the controlling parameters. While these investigations focused on the cleanup of wastewater generated from subcritical water remediation, the results also apply to cleanup of any wastewater contaminated with nonpolar and moderately polar organics such as wastewaters from coal and petroleum processing.

  9. A study of the organic emission from a turbocharged diesel engine running on 12 percent hexyl nitrate dissolved in ethanol

    SciTech Connect (OSTI)

    Walde, N.; Westerholm, R.; Persson, K.-A.

    1984-01-01

    A highly rated turbocharged diesel engine adapted for an alternative fuel based on ethanol and hexyl nitrate has been investigated with respect to the emission of organic compounds in the exhausts. The adaption involves: ignition nozzles with larger holes, a change of injection timing and more fuel injected per stroke. Emissions were measured at four different driving modes ie, 1, 8, 10 and 12 respectively, in the California Cycle. The exhaust composition are different compared to conventional diesel emissions. The main part of the organic pollutants consists of unburned ethanol and hexyl nitrate, acetaldehyde being the most abundant aldehyde.

  10. Sorption of polycyclic aromatic hydrocarbons to minerals and low-organic-carbon aquifer sediments 

    E-Print Network [OSTI]

    Grimaldi, Gabriel Orlando

    1999-01-01

    The molecular mechanisms and major geochemical factors ics. controlling the sorption of nontoxic organic chemicals (NOC) to mineral surfaces in low-organic-carbon soils and sediments remain unclear. The objectives of this research were to study...

  11. Highly efficient carbon dioxide capture with a porous organic polymer impregnated with

    E-Print Network [OSTI]

    Paik Suh, Myunghyun

    Highly efficient carbon dioxide capture with a porous organic polymer impregnated environmental crises such as global warming and ocean acidication, efficient carbon dioxide (CO2) capture As CO2 capture mate- rials, numerous solid adsorbents such as silica5 and carbon materials,6 metal

  12. Storage of Hydrogen, Methane, and Carbon Dioxide in Highly Porous Covalent Organic Frameworks for Clean Energy

    E-Print Network [OSTI]

    Yaghi, Omar M.

    Storage of Hydrogen, Methane, and Carbon Dioxide in Highly Porous Covalent Organic Frameworks efficient systems to capture carbon dioxide. Additionally, we have a long-standing collaboration with BASF, and carbon dioxide isotherm measurements were performed at 1-85 bar and 77-298 K on the evacuated forms

  13. Doctoral Defense "Carbon Dioxide Capture on Elastic Layered Metal-Organic

    E-Print Network [OSTI]

    Kamat, Vineet R.

    Doctoral Defense "Carbon Dioxide Capture on Elastic Layered Metal-Organic Framework Adsorbents Professor, Civil & Environmental Engineering The steady rising level of atmospheric carbon dioxide resulting to the economy that is heavily relied on fossil fuels. Although the transition of the existing carbon

  14. Relationship between Compost Stability and Extractable Organic Carbon L. Wu and L. Q. Ma*

    E-Print Network [OSTI]

    Ma, Lena

    Relationship between Compost Stability and Extractable Organic Carbon L. Wu and L. Q. Ma* ABSTRACT to the factEstablishing a simple yet reliable compost stability test is essential that NaOH-extractable organic carbon (OC) containsfor a better compost quality control and utilization efficiency. The objective

  15. Maximum total organic carbon limit for DWPF melter feed

    SciTech Connect (OSTI)

    Choi, A.S.

    1995-03-13

    DWPF recently decided to control the potential flammability of melter off-gas by limiting the total carbon content in the melter feed and maintaining adequate conditions for combustion in the melter plenum. With this new strategy, all the LFL analyzers and associated interlocks and alarms were removed from both the primary and backup melter off-gas systems. Subsequently, D. Iverson of DWPF- T{ampersand}E requested that SRTC determine the maximum allowable total organic carbon (TOC) content in the melter feed which can be implemented as part of the Process Requirements for melter feed preparation (PR-S04). The maximum TOC limit thus determined in this study was about 24,000 ppm on an aqueous slurry basis. At the TOC levels below this, the peak concentration of combustible components in the quenched off-gas will not exceed 60 percent of the LFL during off-gas surges of magnitudes up to three times nominal, provided that the melter plenum temperature and the air purge rate to the BUFC are monitored and controlled above 650 degrees C and 220 lb/hr, respectively. Appropriate interlocks should discontinue the feeding when one or both of these conditions are not met. Both the magnitude and duration of an off-gas surge have a major impact on the maximum TOC limit, since they directly affect the melter plenum temperature and combustion. Although the data obtained during recent DWPF melter startup tests showed that the peak magnitude of a surge can be greater than three times nominal, the observed duration was considerably shorter, on the order of several seconds. The long surge duration assumed in this study has a greater impact on the plenum temperature than the peak magnitude, thus making the maximum TOC estimate conservative. Two models were used to make the necessary calculations to determine the TOC limit.

  16. Thermoelectric Behavior of Flexible Organic Nanocomposites with Carbon Nanotubes 

    E-Print Network [OSTI]

    Choi, Kyung Who

    2013-12-03

    .3 Results and discussion …………………………………………….27 vi Page 3.4 Conclusions………………………………………………………..34 CHAPTER IV HIGHLY DOPED CARBON NANOTUBES WITH GOLD NANOPARTICLES AND THEIR INFLUENCE ON ELECTRICAL CONDUCTIVITY AND THERMOPOWER ………..36 4... with carbon nanotubes ………...76 7.3 Highly doped carbon nanotubes with gold nanoparticles and their influence on electric conductivity and thermopower……………………………………………………...77 7.4 N-type thermoelectric performance of functionalized carbon nanotube...

  17. Carbon isotopes and lipid biomarkers from organic-rich facies of the Shuram Formation, Sultanate of Oman

    E-Print Network [OSTI]

    Fischer, Woodward

    carbon reservoir in seawater, release of methane from sediment-hosted clathrates, or water column of the observed time-series trends. We report carbon isotope data from bulk organic carbon, extracted bitumenCarbon isotopes and lipid biomarkers from organic-rich facies of the Shuram Formation, Sultanate

  18. Carbon Dioxide Separation with Novel Microporous Metal Organic Frameworks

    SciTech Connect (OSTI)

    Richard Willis; Annabelle Benin; John Low; Ganesh Venimadhavan; Syed Faheem; David Lesch; Adam Matzger; Randy Snurr

    2008-02-04

    The goal of this program was to develop a low cost novel sorbent to remove carbon dioxide from flue gas and gasification streams in electric utilities. Porous materials named metal-organic frameworks (MOFs) were found to have good capacity and selectivity for the capture of carbon dioxide. Several materials from the initial set of reference MOFs showed extremely high CO{sub 2} adsorption capacities and very desirable linear isotherm shapes. Sample preparation occurred at a high level, with a new family of materials suitable for intellectual property protection prepared and characterized. Raman spectroscopy was shown to be useful for the facile characterization of MOF materials during adsorption and especially, desorption. Further, the development of a Raman spectroscopic-based method of determining binary adsorption isotherms was initiated. It was discovered that a stronger base functionality will need to be added to MOF linkers in order to enhance CO{sub 2} selectivity over other gases via a chemisorption mechanism. A concentrated effort was expended on being able to accurately predict CO{sub 2} selectivities and on the calculation of predicted MOF surface area values from first principles. A method of modeling hydrolysis on MOF materials that correlates with experimental data was developed and refined. Complimentary experimental data were recorded via utilization of a combinatorial chemistry heat treatment unit and high-throughput X-ray diffractometer. The three main Deliverables for the project, namely (a) a MOF for pre-combustion (e.g., IGCC) CO{sub 2} capture, (b) a MOF for post-combustion (flue gas) CO{sub 2} capture, and (c) an assessment of commercial potential for a MOF in the IGCC application, were completed. The key properties for MOFs to work in this application - high CO{sub 2} capacity, good adsorption/desorption rates, high adsorption selectivity for CO{sub 2} over other gases such as methane and nitrogen, high stability to contaminants, namely moisture, and easy regenerability, were all addressed during this program. As predicted at the start of the program, MOFs have high potential for CO{sub 2} capture in the IGCC and flue gas applications.

  19. Spatial and temporal distributions of particulate matter and particulate organic carbon, Northeast Gulf of Mexico 

    E-Print Network [OSTI]

    Bernal, Christina Estefana

    2001-01-01

    The distribution of particulate matter (PM) and particulate organic carbon (POC) was determined during the Northeast Gulf of Mexico Chemical Oceanography and Hydro-graphy program (NEGOM). The hydrography and physical forcing ...

  20. Organic Carbon Cycling in East China Sea Shelf Sediments: Linkages with Hypoxia 

    E-Print Network [OSTI]

    Li, Xinxin

    2013-01-03

    The Changjiang River provides the main source of sediment and terrestrial derived organic carbon (OC) to the Changjiang large delta-front estuary (LDE) in the East China Sea (ECS). This study analyzed bulk OC, biomarkers including lignin and plant...

  1. Polymer and carbon nanotube materials for chemical sensors and organic electronics

    E-Print Network [OSTI]

    Wang, Fei, Ph. D. Massachusetts Institute of Technology

    2010-01-01

    This thesis details the development of new materials for high-performance chemical sensing as well as organic electronic applications. In Chapter 2, we develop a chemiresistive material based on single-walled carbon nanotubes ...

  2. Quantification of soil organic carbon using mid- and near- DRIFT spectroscopy 

    E-Print Network [OSTI]

    Kang, Misun

    2004-09-30

    ) and oxidizable organic carbon (OCWB) fraction were calibrated and predicted by mid- and near-DRIFT spectroscopy in combination with partial least squares (PLS) regression method. PLS regression is a multivariate calibration method that can decompose spectral data...

  3. Biochar decreases dissolved organic carbon but not nitrate leaching in relation to vinasse application in a Brazilian sugarcane soil

    E-Print Network [OSTI]

    effects that are not included in energy assessments, such as impacts on water quality, including disposal, inputs to ground and surface water from land- applied vinasse remain a challenge. Previously with vinasse [SV], soil with vinasse and biochar [SVB], and soil with biochar [SB]) were flushed with water

  4. Constraining the propagation of bomb-radiocarbon through the dissolved organic carbon (DOC) pool in the northeast Pacific Ocean

    E-Print Network [OSTI]

    Beaupré, Steven R; Druffel, Ellen R.M.

    2009-01-01

    the deviations in D 14 C measurements of UV oxidized 14 CM) for concentration measurements via UV-oxidation (Beaupre´

  5. Constraining the propagation of bomb-radiocarbon through the dissolved organic carbon (DOC) pool in the northeast Pacific Ocean

    E-Print Network [OSTI]

    Beaupré, Steven R; Druffel, Ellen R.M.

    2009-01-01

    the most recent series of thermonuclear tests. Nature 200 (Druffel, 1987) created by thermonuclear weapons testing inthe time elapsed since thermonuclear weapons testing ($50

  6. Highly efficient separation of carbon dioxide by a metal-organic framework replete with

    E-Print Network [OSTI]

    Yaghi, Omar M.

    media. carbon dioxide capture dynamic adsorption reticular chemistry Selective removal of CO2 fromHighly efficient separation of carbon dioxide by a metal-organic framework replete with open metal capture of CO2, which is essential for natural gas purifi- cation and CO2 sequestration, has been reported

  7. Origin of particulate organic carbon in the marine atmosphere as indicated by it stable carbon isotopic composition

    SciTech Connect (OSTI)

    Chesselet, R.; Fontugne, M.; Buat-Menard, P.; Ezat, U.; Lambert, C.E.

    1981-04-01

    Organic carbon concentration and isotopic composition were determined in samples of atmospheric particulate matter collected in 1979 at remote marine locations (Enewetak atoll, Sargasso Sea) during the SEAREX (Sea-Air Exchange) program field experiments. Atmospheric Particulate Organic Carbon (POC) concentrations were found to be in the range of 0.3 to 1.2 mg. m/sup -3/, in agreement with previous literature data. The major mass of POC was found on the smallest particles (r<0.5 mm). The /sup 13/C//sup 12/C of the small particles is close to the one expected (d/sup 13/C = 26 +- 2/sup 0///sub infinity/) for atmospheric POC of continental origin. For all the samples analysed so far, it appears that more than 80% of atmospheric POC over remote marine areas is of continental origin. This can be explained either by long-range transport of small sized continental organic aserosols or by the production of POC in the marine atmosphere from a vapor phase organic carbon pool of continental origin. The POC in the large size fraction of marine aerosols (<20% of the total concentration) is likely to have a direct marine origin since its carbon isotopic composition is close to the expected value (d/sup 13/C = -21 +- 2/sup 0///sub 00/) for POC associated with sea-salt droplets transported to the marine atmosphere.

  8. Oxygen production and carbon sequestration in an upwelling coastal Burke Hales,1

    E-Print Network [OSTI]

    Oxygen production and carbon sequestration in an upwelling coastal margin Burke Hales,1 Lee Karp), Oxygen production and carbon sequestration in an upwelling coastal margin, Global Biogeochem. Cycles, 20 of particulate organic carbon (POC) and dissolved O2 during the upwelling season off the Oregon coast. Oxygen

  9. Metal-Containing Organic and Carbon Aerogels for Hydrogen Storage

    SciTech Connect (OSTI)

    Satcher, Jr., J H; Baumann, T F; Herberg, J L

    2005-01-10

    This document and the accompanying manuscript summarize the technical accomplishments of our one-year LDRD-ER effort. Hydrogen storage and hydrogen fuel cells are important components of the 2003 Hydrogen Fuel Initiative focused on the reduction of America's dependence on oil. To compete with oil as an energy source, however, one must be able to transport and utilize hydrogen at or above the target set by DOE (6 wt.% H{sub 2}) for the transportation sector. Other than liquid hydrogen, current technology falls well short of this DOE target. As a result, a variety of materials have recently been investigated to address this issue. Carbon nanostructures have received significant attention as hydrogen storage materials due to their low molecular weight, tunable microporosity and high specific surface areas. For example, the National Renewable Energy Laboratory (NREL) achieved 5 to 10 wt.% H{sub 2} storage using metal-doped carbon nanotubes. That study showed that the intimate mix of metal nanoparticles with graphitic carbon resulted in the unanticipated hydrogen adsorption at near ambient conditions. The focus of our LDRD effort was the investigation of metal-doped carbon aerogels (MDCAs) as hydrogen storage materials. In addition to their low mass densities, continuous porosities and high surface areas, these materials are promising candidates for hydrogen storage because MDCAs contain a nanometric mix of metal nanoparticles and graphitic nanostructures. For FY04, our goals were to: (1) prepare a variety of metal-doped CAs (where the metal is cobalt, nickel or iron) at different densities and carbonization temperatures, (2) characterize the microstructure of these materials and (3) initiate hydrogen adsorption/desorption studies to determine H2 storage properties of these materials. Since the start of this effort, we have successfully prepared and characterized Ni- and Co-doped carbon aerogels at different densities and carbonization temperatures. The bulk of this work is described in the attached manuscript entitled 'Formation of Carbon Nanostructures in Cobalt- and Nickel- Doped Carbon Aerogels'. This one-year effort has lead to our incorporation into the DOE Carbon-based Hydrogen Storage Center of Excellence at NREL, with funding from DOE's Energy Efficiency and Renewable Energy (EERE) Program starting in FY05.

  10. Organic solar cells with carbon nanotube network electrodes Michael W. Rowell,a

    E-Print Network [OSTI]

    McGehee, Michael

    Organic solar cells with carbon nanotube network electrodes Michael W. Rowell,a Mark A. Topinka for Organic Solar Cells (LIOS), Johannes Kepler University Linz, Altenbergerstrasse 69, A-4040 Linz, Austria, flexible polymer-fullerene bulk-heterojunction solar cells. The printing method produces relatively smooth

  11. Anomalous Capacitance Maximum of the Glassy Carbon-Ionic Liquid Interface through Dilution with Organic Solvents

    E-Print Network [OSTI]

    Aksay, Ilhan A.

    with Organic Solvents David J. Bozym, Betul Uralcan, David T. Limmer, Michael A. Pope, Nicholas J. Szamreta liquid with miscible organic solvents on the differential capacitance of the glassy carbon,2-dichloroethane, a low- dielectric constant solvent, yield the largest gains in capacitance near the open circuit

  12. Stability and stabilisation of biochar and green manure in soil with different organic carbon contents

    E-Print Network [OSTI]

    Lehmann, Johannes

    Stability and stabilisation of biochar and green manure in soil with different organic carbon-poor soil, whereas the difference was only 0.1 kg/m2 .year with Tithonia diversifolia green manure. Biochar of biochar exceeds that of a labile organic matter addition such as green manure. Additional keywords

  13. Improved Detection of Bed Boundaries for Petrophysical Evaluation with Well Logs: Applications to Carbonate and Organic-Shale Formations

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    : Applications to Carbonate and Organic-Shale Formations Zoya Heidari, SPE, Texas A&M University and Carlos of well logs acquired in organic shales and carbonates is challenging because of the presence of thin beds acquired in thinly bedded carbonates and in the Haynesville shale-gas formation. Estimates of petrophysical

  14. FTIR spectroscopy can predict organic matter quality in2 regenerating cutover peatlands3

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    emissions51 Soil Biology and Biochemistry #12;3 show a return to net carbon sequestration (Tuittila et al sequestration potential. Increased losses of dissolved organic carbon (DOC)55 have been observed from many area. Peat46 extraction for fuel and horticultural use has steadily diminished this carbon stock,47

  15. Transport of organic carbon from the California coast to the slope region: A study of Delta 14 C and delta 13 C signatures of organic compound classes

    E-Print Network [OSTI]

    Hwang, Jeomshik; Druffel, Ellen R. M; Komada, Tomoko

    2005-01-01

    Channel, California, in Shelf Sediment Transport: Processesthat lateral transport of OC on the California margin is an2005 Transport of organic carbon from the California coast

  16. 1 INTRODUCTION In many groundwater environments, organic carbon,

    E-Print Network [OSTI]

    Roberts, Jennifer A.

    - duced from metabolism of contaminating aromatic hydrocarbons corresponds to the increased dissolu- tion nutrients such as ni- trogen and phosphorus are scarce. When carbon in the form of a contaminant is added can alter silicate solubility directly when attached, by perturbing mineral-water equilibria

  17. The Minnesota Filter: A Tool for Capturing Stormwater Dissolved Phosphorus

    E-Print Network [OSTI]

    Minnesota, University of

    (inorganic, organic) · Nutrients (nitrogen, phosphorus, etc.) · Metals (copper, cadmium, zinc, etc exchange, etc. to capture dissolved pollutants · Biodegradation: bacteria conversion of nitrates

  18. Substrate and environmental controls on microbial assimilation of soil organic carbon: a framework for Earth System Models

    SciTech Connect (OSTI)

    Xu, Xiaofeng; Schimel, Joshua; Thornton, Peter E; Song, Xia; Yuan, Fengming; Goswami, Santonu

    2014-01-01

    Microbial assimilation of soil organic carbon is one of the fundamental processes of global carbon cycling and it determines the magnitude of microbial biomass in soils. Mechanistic understanding of microbial assimilation of soil organic carbon and its controls is important for to improve Earth system models ability to simulate carbon-climate feedbacks. Although microbial assimilation of soil organic carbon is broadly considered to be an important parameter, it really comprises two separate physiological processes: one-time assimilation efficiency and time-dependent microbial maintenance energy. Representing of these two mechanisms is crucial to more accurately simulate carbon cycling in soils. In this study, a simple modeling framework was developed to evaluate the substrate and environmental controls on microbial assimilation of soil organic carbon using a new term: microbial annual active period (the length of microbes remaining active in one year). Substrate quality has a positive effect on microbial assimilation of soil organic carbon: higher substrate quality (lower C:N ratio) leads to higher ratio of microbial carbon to soil organic carbon and vice versa. Increases in microbial annual active period from zero stimulate microbial assimilation of soil organic carbon; however, when microbial annual active period is longer than an optimal threshold, increasing this period decreases microbial biomass. The simulated ratios of soil microbial biomass to soil organic carbon are reasonably consistent with a recently compiled global dataset at the biome-level. The modeling framework of microbial assimilation of soil organic carbon and its controls developed in this study offers an applicable ways to incorporate microbial contributions to the carbon cycling into Earth system models for simulating carbon-climate feedbacks and to explain global patterns of microbial biomass.

  19. Quantification of the Effects of Organic and Carbonate Buffers on

    E-Print Network [OSTI]

    Sverjensky, Dimitri A.

    on a Goethite-Based Granular Porous Adsorbent M A S A K A Z U K A N E M A T S U , * , T H O M A S M . Y O U N G well characterized goethite-based adsorbent (Bayoxide E33 (E33)). All adsorption isotherms obtained calibrated using independent published carbonate adsorption data for pure goethite taking into consideration

  20. Method and apparatus for regenerating activated carbon containing an adsorbed volatile organic absorbate

    SciTech Connect (OSTI)

    Tiggelbeck, D.D.; Goyak, G.M.

    1993-07-27

    A method is described for regenerating spent activated carbon containing adsorbed volatile organic adsorbate comprising: establishing a confined downwardly moving bed of activated carbon; adding spent carbon to the top of said bed; introducing superheated steam into the bottom of said bed in contact with said carbon; recovering exit gas including predominantly superheated steam and volatilized adsorbate from the top of said bed; circulating a portion of said exit gas through a superheater and compressor to the bottom of said bed; withdrawing a portion of said exit gas through a cooler to condense steam and volatile adsorbate; continuously circulating superheated steam in a closed loop through said downwardly moving bed, said compressor and said superheater; recovering partially regenerated activated carbon containing residual volatile adsorbate from the bottom of said bed.

  1. Organic carbon flux and organic carbon to calcite flux ratio recorded in deep-sea carbonates: Demonstration and a new proxy

    E-Print Network [OSTI]

    Oceanography: General: Equatorial oceanography; 4805 Oceanography: Biological and Chemical: Biogeochemical cycles (1615); 4806 Oceanography: Biological and Chemical: Carbon cycling; 4842 Oceanography: Biological

  2. The Effect of Metal Salts on Quantification of Elemental and Organic Carbon in Diesel Exhaust

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    The Effect of Metal Salts on Quantification of Elemental and Organic Carbon in Diesel Exhaust-loaded diesel samples. Estimated TC was calculated from the BC concentration measured by optical transmissometer and linear relationship between TC and BC, TC (µg)= 1.78 ×BC(µg) - 21.97, derived from diesel reference

  3. Continuous Flow Analysis of Total Organic Carbon in Polar Ice Cores

    E-Print Network [OSTI]

    Stocker, Thomas

    Continuous Flow Analysis of Total Organic Carbon in Polar Ice Cores U R S F E D E R E R , * , , P, University of Bern, Bern, Switzerland, Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland, and British Antarctic Survey, Cambridge, United Kingdom Received May 6, 2008. Revised manuscript

  4. Identification of Sediment Organic Carbon Location and Association with Polycyclic Aromatic Hydrocarbons (PAHs) in Contaminated Sediment

    E-Print Network [OSTI]

    Identification of Sediment Organic Carbon Location and Association with Polycyclic Aromatic Hydrocarbons (PAHs) in Contaminated Sediment Upal Ghosh1 , Richard G. Luthy1 , J. Seb Gillette2 , and Richard N long-term issue confronting sediment bioremediation is the lack of understanding of contaminant-sediment

  5. Carbon allocation among tree organs: A review of basic processes and representation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    allocation coefficients; (ii) models based on growth rules, including functional balance or "goal allocation is a key component in function- al-structural tree models (FSTMs). In the short term, parReview Carbon allocation among tree organs: A review of basic processes and representation

  6. Seasonal and interannual changes in particulate organic carbon export and deposition in the Chukchi Sea

    E-Print Network [OSTI]

    Hansell, Dennis

    Seasonal and interannual changes in particulate organic carbon export and deposition in the Chukchi) export fluxes were estimated in the shelf-slope region of the Chukchi Sea using measurements of 234 ThŔ238 U disequilibria and the POC/234 Th ratio in large (>53-mm) particles. These export fluxes were

  7. Optical Properties of Mixed Black Carbon, Inorganic and Secondary Organic Aerosols

    SciTech Connect (OSTI)

    Paulson, S E

    2012-05-30

    Summarizes the achievements of the project, which are divided into four areas: 1) Optical properties of secondary organic aerosols; 2) Development and of a polar nephelometer to measure aerosol optical properties and theoretical approaches to several optical analysis problems, 3) Studies on the accuracy of measurements of absorbing carbon by several methods, and 4) Environmental impacts of biodiesel.

  8. Mobilization pathways of organic carbon from permafrost to arctic rivers in a changing climate

    E-Print Network [OSTI]

    Guo, Laodong

    Mobilization pathways of organic carbon from permafrost to arctic rivers in a changing climate rivers and Arctic coastal regions. To elucidate the transport pathways of SOC, radiocarbon composition is more readily influenced by modern terrestrial biomass, especially in large river basins which also

  9. Role of large-scale soil structure in organic carbon turnover: Evidence from California grassland soils

    E-Print Network [OSTI]

    Role of large-scale soil structure in organic carbon turnover: Evidence from California grassland soils Stephanie A. Ewing,1 Jonathan Sanderman,1 W. Troy Baisden,2 Yang Wang,3 and Ronald Amundson1 characterized the effect of large-scale (>20 mm) soil physical structure on the age and recalcitrance of soil

  10. ORGANIC CONTENT OF LAKE WATER By EDWARD A. BIRGE and CHANCEY JUDAY

    E-Print Network [OSTI]

    ORGANIC CONTENT OF LAKE WATER .:I- By EDWARD A. BIRGE and CHANCEY JUDAY Wisconsin Geological and Natural HistolY Sun'ey .:I- CONTENTS Page Introductlon; ~ - - _________ 185 I.-Data__u u n _ 186 Dissolved carbon; 194 n.-Discussion o(the data-Contd. Total organic content u _ Total organic matter, including

  11. Soil organic carbon and nutrient content in aggregate-size fractions of a subtropical rice soil under variable tillage

    E-Print Network [OSTI]

    Florida, University of

    Soil organic carbon and nutrient content in aggregate-size fractions of a subtropical rice soil The effects of tillage on soil organic carbon (SOC) and nutrient content of soil aggregates can vary spatially and temporally, and for different soil types and cropping systems. We assessed SOC and nutrient levels within

  12. Stable isotope analysis of organic carbon in small (mg C) samples and dissolved organic matter using a GasBench preparation device

    E-Print Network [OSTI]

    Gilli, Adrian

    on freeze-dried samples of DOC. The low detection limit and the ease with which it can be combined,4] Modifications to the EA system, including cryogenically trapping the CO2 resulting from sample combustion

  13. Study on removal of organic sulfur compound by modified activated carbon

    SciTech Connect (OSTI)

    Fan Huiling; Li Chunhu; Guo Hanxian [Taiyuan Univ. of Technology (China). Research Inst. for Chemical Engineering of Coal

    1997-12-31

    With the price of coal increasing in China, more and more small and medium scale chemical plants are turning to high sulfur coal as the raw material in order to cut cost. However, the major drawback is that the lifetime of the ammonia synthesis catalyst is then reduced greatly because of the high concentration of the sulfur compounds in the synthesis gas, especially organic sulfur, usually CS{sub 2} and COS. The effects of water vapor and experimental temperature on removal of organic sulfur compounds by using a modified activated carbon were studied in this paper. It was found that water vapor had a negative effect on removal of carbon disulfide by activated carbon impregnated with organic amine. The use of activated carbon impregnated with K{sub 2}CO{sub 3} for removal of carbonyl sulfide was also investigated over the temperature range 30--60, the results show a favorable temperature (40) existing for carbonyl sulfide removal. Fixed-bed breakthrough curves for the adsorbent bed were also offered in this paper.

  14. Effects of organic carbon supply rates on mobility of previously bioreduced uranium in a contaminated sediment

    E-Print Network [OSTI]

    Wan, J.

    2008-01-01

    contaminated subsurface sediments. Environ. Microbiol. 2002,in previously bioreduced sediment by dissolved oxygen andcontaminated aquifer sediments. Appl Environ Microbiol 2002,

  15. Nanostructured electrodes for organic bulk heterojunction solar cells: Model study using carbon nanotube dispersed polythiophene-fullerene

    E-Print Network [OSTI]

    Nanostructured electrodes for organic bulk heterojunction solar cells: Model study using carbon for organic pseudo-bilayer solar cells J. Appl. Phys. 112, 084511 (2012) Addition of regiorandom poly(3 (2012) Tunable open-circuit voltage in ternary organic solar cells Appl. Phys. Lett. 101, 163302 (2012

  16. Electrosynthesis of Organic Compounds from Carbon Dioxide Is Catalyzed by a Diversity of Acetogenic Microorganisms

    SciTech Connect (OSTI)

    Nevin, KP; Hensley, SA; Franks, AE; Summers, ZM; Ou, JH; Woodard, TL; Snoeyenbos-West, OL; Lovley, DR

    2011-04-20

    Microbial electrosynthesis, a process in which microorganisms use electrons derived from electrodes to reduce carbon dioxide to multicarbon, extracellular organic compounds, is a potential strategy for capturing electrical energy in carbon-carbon bonds of readily stored and easily distributed products, such as transportation fuels. To date, only one organism, the acetogen Sporomusa ovata, has been shown to be capable of electrosynthesis. The purpose of this study was to determine if a wider range of microorganisms is capable of this process. Several other acetogenic bacteria, including two other Sporomusa species, Clostridium ljungdahlii, Clostridium aceticum, and Moorella thermoacetica, consumed current with the production of organic acids. In general acetate was the primary product, but 2-oxobutyrate and formate also were formed, with 2-oxobutyrate being the predominant identified product of electrosynthesis by C. aceticum. S. sphaeroides, C. ljungdahlii, and M. thermoacetica had high (> 80%) efficiencies of electrons consumed and recovered in identified products. The acetogen Acetobacterium woodii was unable to consume current. These results expand the known range of microorganisms capable of electrosynthesis, providing multiple options for the further optimization of this process.

  17. Improved thermoelectric power output from multilayered polyethylenimine doped carbon nanotube based organic composites

    SciTech Connect (OSTI)

    Hewitt, Corey A.; Montgomery, David S.; Barbalace, Ryan L.; Carlson, Rowland D.; Carroll, David L., E-mail: carroldl@wfu.edu [Center for Nanotechnology and Molecular Materials, Wake Forest University, 501 Deacon Blvd., Winston Salem, North Carolina 27105 (United States)

    2014-05-14

    By appropriately selecting the carbon nanotube type and n-type dopant for the conduction layers in a multilayered carbon nanotube composite, the total device thermoelectric power output can be increased significantly. The particular materials chosen in this study were raw single walled carbon nanotubes for the p-type layers and polyethylenimine doped single walled carbon nanotubes for the n-type layers. The combination of these two conduction layers leads to a single thermocouple Seebeck coefficient of 96 ± 4??VK{sup ?1}, which is 6.3 times higher than that previously reported. This improved Seebeck coefficient leads to a total power output of 14.7 nW per thermocouple at the maximum temperature difference of 50?K, which is 44 times the power output per thermocouple for the previously reported results. Ultimately, these thermoelectric power output improvements help to increase the potential use of these lightweight, flexible, and durable organic multilayered carbon nanotube based thermoelectric modules in low powered electronics applications, where waste heat is available.

  18. Partitioning Behavior of Organic Contaminants in Carbon Storage Environments: A Critical Review

    SciTech Connect (OSTI)

    Burant, Aniela; Lowry, Gregory V.; Karamalidis, Athanasios K.

    2013-01-13

    Carbon capture and storage is a promising strategy for mitigating the CO{sub 2} contribution to global climate change. The large scale implementation of the technology mandates better understanding of the risks associated with CO{sub 2} injection into geologic formations and the subsequent interactions with groundwater resources. The injected supercritical CO{sub 2} (sc-CO{sub 2}) is a nonpolar solvent that can potentially mobilize organic compounds that exist at residual saturation in the formation. Here, we review the partitioning behavior of selected organic compounds typically found in depleted oil reservoirs in the residual oil–brine–sc-CO{sub 2} system under carbon storage conditions. The solubility of pure phase organic compounds in sc-CO{sub 2} and partitioning of organic compounds between water and sc-CO{sub 2} follow trends predicted based on thermodynamics. Compounds with high volatility and low aqueous solubility have the highest potential to partition to sc-CO{sub 2}. The partitioning of low volatility compounds to sc-CO{sub 2} can be enhanced by cosolvency due to the presence of higher volatility compounds in the sc-CO{sub 2}. The effect of temperature, pressure, salinity, pH, and dissolution of water molecules into sc-CO{sub 2} on the partitioning behavior of organic compounds in the residual oil–brine–sc-CO{sub 2} system is discussed. Data gaps and research needs for models to predict the partitioning of organic compounds in brines and from complex mixtures of oils are presented. Models need to be able to better incorporate the effect of salinity and cosolvency, which will require more experimental data from key classes of organic compounds.

  19. Partitioning Behavior of Organic Contaminants in Carbon Storage Environments: A Critical Review

    SciTech Connect (OSTI)

    Burant, Aniela; Lowry, Gregory V.; Karamalidis, Athanasios K.

    2013-01-01

    Carbon capture and storage is a promising strategy for mitigating the CO{sub 2} contribution to global climate change. The large scale implementation of the technology mandates better understanding of the risks associated with CO{sub 2} injection into geologic formations and the subsequent interactions with groundwater resources. The injected supercritical CO{sub 2} (sc-CO{sub 2}) is a nonpolar solvent that can potentially mobilize organic compounds that exist at residual saturation in the formation. Here, we review the partitioning behavior of selected organic compounds typically found in depleted oil reservoirs in the residual oil–brine–sc-CO{sub 2} system under carbon storage conditions. The solubility of pure phase organic compounds in sc-CO{sub 2} and partitioning of organic compounds between water and sc-CO{sub 2} follow trends predicted based on thermodynamics. Compounds with high volatility and low aqueous solubility have the highest potential to partition to sc-CO{sub 2}. The partitioning of low volatility compounds to sc-CO{sub 2} can be enhanced by co-solvency due to the presence of higher volatility compounds in the sc-CO{sub 2}. The effect of temperature, pressure, salinity, pH, and dissolution of water molecules into sc-CO{sub 2} on the partitioning behavior of organic compounds in the residual oil-brine-sc-CO{sub 2} system is discussed. Data gaps and research needs for models to predict the partitioning of organic compounds in brines and from complex mixtures of oils are presented. Models need to be able to better incorporate the effect of salinity and co-solvency, which will require more experimental data from key classes of organic compounds.

  20. Effects of organic carbon supply rates on mobility of previously bioreduced uranium in a contaminated sediment

    E-Print Network [OSTI]

    Wan, J.

    2008-01-01

    and formation of stable uranyl carbonate complexes, therebyformation of very stable uranyl carbonate complexes, thereby

  1. Lesson Summary Students will learn about the carbon cycle and

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    Processes that Shape the Earth The Living Environment The Flow of Matter and Energy Human Society Global solid minerals (such as limestone), 'squishy' organisms (such as plants and animals), and can be dissolved in water or carried around the world through the atmosphere as carbon dioxide gas. The attributes

  2. PERMAFROST CARBON NETWORK: 4th Annual Meeting 2014

    E-Print Network [OSTI]

    Olefeldt · Vonk: Circum-arctic lability of dissolved organic carbon · Wik: Methane emission potential/Overview: Ted Schuur (30 min): Introduction to the network for newcomers, update on finished products and CO2 production from anoxic soil incubations · Jastrow: Utility of fractionation approaches

  3. Ex 7.6(a) The vapor pressure of benzene is 400 Torr at 60.6C, but it fell to 386 Torr when 19.0 g of an involatile organic compound was dissolved in 500 g of benzene. Calculate the

    E-Print Network [OSTI]

    Findley, Gary L.

    Ex 7.6(a) The vapor pressure of benzene is 400 Torr at 60.6°C, but it fell to 386 Torr when 19.0 g of an involatile organic compound was dissolved in 500 g of benzene. Calculate the molar mass of the involatile

  4. Mobilization and Transport of Organic Compounds from Reservoir Rock and Caprock in Geological Carbon Sequestration Sites

    SciTech Connect (OSTI)

    Zhong, Lirong; Cantrell, Kirk J.; Mitroshkov, Alexandre V.; Shewell, Jesse L.

    2014-05-06

    Supercritical CO2 (scCO2) is an excellent solvent for organic compounds, including benzene, toluene, ethyl-benzene, and xylene (BTEX), phenols, and polycyclic aromatic hydrocarbons (PAHs). Monitoring results from geological carbon sequestration (GCS) field tests has shown that organic compounds are mobilized following CO2 injection. Such results have raised concerns regarding the potential for groundwater contamination by toxic organic compounds mobilized during GCS. Knowledge of the mobilization mechanism of organic compounds and their transport and fate in the subsurface is essential for assessing risks associated with GCS. Extraction tests using scCO2 and methylene chloride (CH2Cl2) were conducted to study the mobilization of volatile organic compounds (VOCs, including BTEX), the PAH naphthalene, and n-alkanes (n-C20 – n-C30) by scCO2 from representative reservoir rock and caprock obtained from depleted oil reservoirs and coal from an enhanced coal-bed methane recovery site. More VOCs and naphthalene were extractable by scCO2 compared to the CH2Cl2 extractions, while scCO2 extractable alkane concentrations were much lower than concentrations extractable by CH2Cl2. In addition, dry scCO2 was found to extract more VOCs than water saturated scCO2, but water saturated scCO2 mobilized more naphthalene than dry scCO2. In sand column experiments, moisture content was found to have an important influence on the transport of the organic compounds. In dry sand columns the majority of the compounds were retained in the column except benzene and toluene. In wet sand columns the mobility of the BTEX was much higher than that of naphthalene. Based upon results determined for the reservoir rock, caprock, and coal samples studied here, the risk to aquifers from contamination by organic compounds appears to be relatively low; however, further work is necessary to fully evaluate risks from depleted oil reservoirs.

  5. Transport of Organic Contaminants Mobilized from Coal through Sandstone Overlying a Geological Carbon Sequestration Reservoir

    SciTech Connect (OSTI)

    Zhong, Lirong; Cantrell, Kirk J.; Bacon, Diana H.; Shewell, Jesse L.

    2014-02-01

    Column experiments were conducted using a wetted sandstone rock installed in a tri-axial core holder to study the flow and transport of organic compounds mobilized by scCO2 under simulated geologic carbon storage (GCS) conditions. The sandstone rock was collected from a formation overlying a deep saline reservoir at a GCS demonstration site. Rock core effluent pressures were set at 0, 500, or 1000 psig and the core temperature was set at 20 or 50°C to simulate the transport to different subsurface depths. The concentrations of the organic compounds in the column effluent and their distribution within the sandstone core were monitored. Results indicate that the mobility though the core sample was much higher for BTEX compounds than for naphthalene. Retention of organic compounds from the vapor phase to the core appeared to be primarily controlled by partitioning from the vapor phase to the aqueous phase. Adsorption to the surfaces of the wetted sandstone was also significant for naphthalene. Reduced temperature and elevated pressure resulted in greater partitioning of the mobilized organic contaminants into the water phase.

  6. Steady state estimation of soil organic carbon using satellite-derived canopy leaf area index

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Fang, Yilin; Liu, Chongxuan; Huang, Maoyi; Li, Hongyi; Leung, Lai-Yung R.

    2014-12-02

    Soil organic carbon (SOC) plays a key role in the global carbon cycle that is important for decadal-to-century climate prediction. Estimation of soil organic carbon stock using model-based methods typically requires spin-up (time marching transient simulation) of the carbon-nitrogen (CN) models by performing hundreds to thousands years long simulations until the carbon-nitrogen pools reach dynamic steady-state. This has become a bottleneck for global modeling and analysis, especially when testing new physical and/or chemical mechanisms and evaluating parameter sensitivity. Here we report a new numerical approach to estimate global soil carbon stock that can avoid the long term spin-up of themore »CN model. The approach uses canopy leaf area index (LAI) from satellite data and takes advantage of a reaction-based biogeochemical module NGBGC (Next Generation BioGeoChemical Module) that was recently developed and incorporated in version 4 of the Community Land Model (CLM4). Although NGBGC uses the same CN mechanisms as used in CLM4CN, it can be easily configured to run prognostic or steady state simulations. In this approach, monthly LAI from the multi-year Moderate Resolution Imaging Spectroradiometer (MODIS) data was used to calculate potential annual average gross primary production (GPP) and leaf carbon for the period of the atmospheric forcing. The calculated potential annual average GPP and leaf C are then used by NGBGC to calculate the steady-state distributions of carbon and nitrogen in different vegetation and soil pools by solving the steady-state reaction-network in NGBGC using the Newton-Raphson method. The new approach was applied at point and global scales and compared with SOC derived from long spin-up by running NGBGC in prognostic mode, and SOC from the empirical data of the Harmonized World Soil Database (HWSD). The steady-state solution is comparable to the spin-up value when the MODIS LAI is close to the LAI from the spin-up solution, and largely captured the variability of the HWSD SOC across the different dominant plant functional types (PFTs) at global scale. The numerical correlation between the calculated and HWSD SOC was, however, weak at both point and global scales, suggesting that the models used in describing biogeochemical processes in CLM needs improvements and/or HWSD needs updating as suggested by other studies. Besides SOC, the steady state solution also includes all other state variables simulated by a spin-up run, such as NPP, GPP, total vegetation C etc., which makes the developed approach a promising tool to efficiently estimate global SOC distribution and evaluate and compare different aspects simulated by different CN mechanisms in the model.« less

  7. Dialkylene carbonate-bridged polysilsesquioxanes. Hybrid organic-inorganic sol-gels with a thermally labile bridging group

    SciTech Connect (OSTI)

    Loy, D.A.; Beach, J.V.; Baugher, B.M.; Assink, R.A.; Shea, K.J.; Tran, J.; Small, J.H.

    1999-11-01

    In this paper, the authors introduce a new approach for altering the properties of bridged polysilsesquioxane xerogels using postprocessing modification of the polymeric network. The bridging organic group contains latent functionalities that can be liberated thermally, photochemically, or chemically after the gel has been processed to a xerogel. These modifications can produce changes in density, solubility, porosity, and or chemical properties of the material. Since every monomer possesses two latent functional groups, the technique allows for the introduction of high levels of functionality in hybrid organic-inorganic materials. Dialkylene carbonate-bridged polysilsesquioxane gels were prepared by the sol-gel polymerization of bis(triethoxysilylpropyl) carbonate and bis(triethoxysilylisobutyl) carbonate. Thermal treatment of the resulting nonporous xerogels and aerogels at 300--350 C resulted in quantitative decarboxylation of the dialkylene carbonate bridging groups to give new hydroxyalkyl and olefinic substituted polysilsesquioxane monolithic xerogels and aerogels that cannot be directly prepared through direct sol-gel polymerization of organotrialkoxysilanes.

  8. Weathering controls on mechanisms of carbon storage in grassland soils

    SciTech Connect (OSTI)

    Masiello, C.A.; Chadwick, O.A.; Southon, J.; Torn, M.S.; Harden, J.W.

    2004-09-01

    On a sequence of soils developed under similar vegetation, temperature, and precipitation conditions, but with variations in mineralogical properties, we use organic carbon and 14C inventories to examine mineral protection of soil organic carbon. In these soils, 14C data indicate that the creation of slow-cycling carbon can be modeled as occurring through reaction of organic ligands with Al3+ and Fe3+ cations in the upper horizons, followed by sorption to amorphous inorganic Al compounds at depth. Only one of these processes, the chelation of Al3+ and Fe3+ by organic ligands, is linked to large carbon stocks. Organic ligands stabilized by this process traverse the soil column as dissolved organic carbon (both from surface horizons and root exudates). At our moist grassland site, this chelation and transport process is very strongly correlated with the storage and long-term stabilization of soil organic carbon. Our 14C results show that the mechanisms of organic carbon transport and storage at this site follow a classic model previously believed to only be significant in a single soil order (Spodosols), and closely related to the presence of forests. The presence of this process in the grassland Alfisol, Inceptisol, and Mollisol soils of this chronosequence suggests that this process is a more significant control on organic carbon storage than previously thought.

  9. Effects of solar radiation on organic matter cycling: Formation of carbon monoxide and carbonyl sulfide (Chapter 11). Book chapter

    SciTech Connect (OSTI)

    Zepp, R.G.

    1994-01-01

    The effects of photoinduced processes on carbon cycling and the biospheric emission of two important trace carbon gases--carbon monoxide and carbonyl sulfide--are examined. Both of these gases are likely to play an important role in the biospheric feedbacks that may reinforce or attenuate future changes in climate. Evidence is presented to support the hypothesis that a significant fraction of the global sources of both of these gases derives from the photochemical fragmentation of decayed plant materials and other biogenic organic matter in terrestrial and marine environments.

  10. Effects of carbon dioxide on peak mode isotachophoresis: Simultaneous preconcentration and separation

    E-Print Network [OSTI]

    Santiago, Juan G.

    Effects of carbon dioxide on peak mode isotachophoresis: Simultaneous preconcentration ions resulting from dissolved atmospheric carbon dioxid e to weakly disrupt isotachophoretic the hydration and carbamation reaction of dissolved atmospheric carbon dioxide, respectively. The width

  11. Photocatalytic and chemical oxidation of organic compounds in supercritical carbon dioxide. Progress report for FY97

    SciTech Connect (OSTI)

    Blake, D.M.; Bryant, D.L.; Reinsch, V.

    1997-09-30

    'The background for the project is briefly reviewed and the work done during the nine months since funding was received is documented. Work began in January, 1997. A post doctoral fellow joined the team in April. The major activities completed this fiscal year were: staffing the project, design of the experimental system, procurement of components, assembly of the system. preparation of the Safe Operating Procedure and ES and H compliance, pressure testing, establishing data collection and storage methodology, and catalyst preparation. Objective The objective of the project is to develop new chemistry for the removal of organic contaminants from supercritical carbon dioxide. This has application in processes used for continuous cleaning and extraction of parts and waste materials. A secondary objective is to increase the fundamental understanding of photocatalytic chemistry. Cleaning and extraction using supercritical carbon dioxide (scCO{sub 2}) can be applied to the solution of a wide range of environmental and pollution prevention problems in the DOE complex. Work is being done that explores scCO{sub 2} in applications ranging from cleaning contaminated soil to cleaning components constructed from plutonium. The rationale for use of scCO{sub 2} are based on the benign nature, availability and low cost, attractive solvent properties, and energy efficient separation of the extracted solute from the solvent by moderate temperature or pressure changes. To date, R and D has focussed on the methods and applications of the extraction steps of the process. Little has been done that addresses methods to polish the scCO{sub 2} for recycle in the cleaning or extraction operations. In many applications it will be desirable to reduce the level of contamination from that which would occur at steady state operation of a process. This proposal addresses chemistry to achieve that. This would be an alternative to removing a fraction of the contaminated scCO{sub 2} for disposal and using makeup scCO{sub 2}. A chemical polishing operation can reduce the release of CO{sub 2} from the process. It can also reduce the consumption of reagents that may be used in the process to enhance extraction and cleaning. A polishing operation will also reduce or avoid formation of an additional waste stream. Photocatalytic and other photochemical oxidation chemistry have not been investigated in scCO{sub 2}. The large base of information for these reactions in water, organic solvents, or air suggest that the chemistry will work in carbon dioxide. There are compelling reasons to believe that the properties of scCO{sub 2} should increase the performance of photocatalytic chemistry over that found in more conventional fluid phases.'

  12. Seasonal hydrology drives rapid shifts in the flux and composition of dissolved and particulate organic carbon and major and trace ions in the Fraser River, Canada

    E-Print Network [OSTI]

    Peucker-Ehrenbrink, B.

    Rapid changes in the volume and sources of discharge during the spring freshet lead to pronounced variations in biogeochemical properties in snowmelt-dominated river basins. We used daily sampling during the onset of the ...

  13. Identifying sources of dissolved organic carbon in agriculturally dominated rivers using radiocarbon age dating: Sacramento–San Joaquin River Basin, California

    E-Print Network [OSTI]

    Sickman, James O.; DiGiorgio, Carol L.; Lee Davisson, M.; Lucero, Delores M.; Bergamaschi, Brian

    2010-01-01

    peat soils, Sacramento–San Joaquin Delta, California: implications for drinking-water quality. Water-Resources

  14. Identifying sources of dissolved organic carbon in agriculturally dominated rivers using radiocarbon age dating: Sacramento–San Joaquin River Basin, California

    E-Print Network [OSTI]

    Sickman, James O.; DiGiorgio, Carol L.; Lee Davisson, M.; Lucero, Delores M.; Bergamaschi, Brian

    2010-01-01

    Water Project and -152% in the Sacramento River. Electronicof Water Resources, Sacramento, CA 95814, USA e-mail:United States Geological Survey, Sacramento, CA, USA e-mail:

  15. Distribution, Speciation, and Elemental Associations of Soil Organic Carbon under Varying Landscape Topographic Positions at the Molecular Scale

    E-Print Network [OSTI]

    Sparks, Donald L.

    Distribution, Speciation, and Elemental Associations of Soil Organic Carbon under Varying Landscape spectra and maps were collected. Results: C Distribution and Associations with the Major Elements in Soil Clay Particles Fig.1. Relative elemental distribution maps (9µm×6µm) of clay fractions from the A

  16. Speciation of ambient fine organic carbon particles and source apportionment of PM2.5 in Indian cities

    E-Print Network [OSTI]

    Zheng, Mei

    2007; published 7 August 2007. [1] Fine particle organic carbon in Delhi, Mumbai, Kolkata­36% in Mumbai, 37­57% in Kolkata, and 28% in Chandigarh. These figures can be compared to the biomass combustion contributions to ambient PM2.5 of 7­20% for Delhi, 7­20% for Mumbai, 13­18% for Kolkata, and 8% for Chandigarh

  17. Chemical Composition of Gas-Phase Organic Carbon Emissions from Motor Vehicles and Implications for Ozone Production

    E-Print Network [OSTI]

    Goldstein, Allen

    Chemical Composition of Gas-Phase Organic Carbon Emissions from Motor Vehicles and Implications gasoline and diesel vehicles via two methods. First we use speciated measurements of exhaust emissions from-based, single vehicle dynamometer testing, and on-road measurements in roadway tunnels.3-12 Emission factors

  18. Carbon Nanosheets and Nanostructured Electrodes in Organic Photovoltaic Devices: Cooperative Research and Development Final Report, CRADA Number CRD-08-321

    SciTech Connect (OSTI)

    Olson, D.

    2012-04-01

    Carbon nanosheet thin films were employed as nanostructured electrodes in organic solar cells. Due to the nanostructured texture of the carbon nanosheet electrodes, there was an increase in performance over standard ITO electrodes with very thick active layers. ZnO deposited via atomic layer deposition (ALD) was used as a hole blocking layer to provide for carrier selectivity of the carbon nanosheets.

  19. Carbon dioxide effects research and assessment program: flux of organic carbon by rivers to the oceans. [Lead abstract

    SciTech Connect (OSTI)

    1981-04-01

    Separate abstracts were prepared for the 15 papers presented in this workshop report. The state of knowledge about the role of rivers in the transport, storage and oxidation of carbon is the subject of this report. (KRM)

  20. Black carbon in the Gulf of Maine : new insights into inputs and cycling of combustion-derived organic carbon

    E-Print Network [OSTI]

    Flores Cervantes, Déborah Xanat, 1978-

    2008-01-01

    Emissions of black carbon (BC), the soot and char formed during incomplete combustion of fossil and biomass fuels, have increased over the last century and are estimated to be between 8 and 270 Tg BC/yr. BC may affect ...

  1. Low Power, Red, Green and Blue Carbon Nanotube Enabled Vertical Organic Light Emitting Transistors for Active Matrix OLED Displays

    SciTech Connect (OSTI)

    McCarthy, M. A. [University of Florida, Gainesville; Liu, B. [University of Florida, Gainesville; Donoghue, E. P. [University of Florida, Gainesville; Kravchenko, Ivan I [ORNL; Kim, D. Y. [University of Florida, Gainesville; So, Franky [University of Florida, Gainesville; Rinzler, A. G. [University of Florida, Gainesville

    2011-01-01

    Organic semiconductors are potential alternatives to polycrystalline silicon as the semiconductor used in the backplane of active matrix organic light emitting diode displays. Demonstrated here is a light-emitting transistor with an organic channel, operating with low power dissipation at low voltage, and high aperture ratio, in three colors: red, green and blue. The single-wall carbon nanotube network source electrode is responsible for the high level of performance demonstrated. A major benefit enabled by this architecture is the integration of the drive transistor, storage capacitor and light emitter into a single device. Performance comparable to commercialized polycrystalline-silicon TFT driven OLEDs is demonstrated.

  2. Limiting diffusion coefficients of heavy molecular weight organic contaminants in supercritical carbon dioxide 

    E-Print Network [OSTI]

    Orejuela, Mauricio

    1994-01-01

    Carbon Dioxide. 5. Measured Diffusion Coefficients of Hexachlorobenzene in Supercritical Carbon Dioxide. 6. Measured Diffusion Coefficients of Pentachlorophenol in Supercritical Carbon Dioxide. 7. Carbon Dioxide Parameters as Determined by Empirical..., and for polyatomic solute and solvent molecules, A?was set to 0. 70. Erkey (1989) determined the translational-rotational coupling parameters for binary n-Alkane systems from measured diffusivity data at a wide range of densities. It was shown...

  3. Bulk Organic and Soil 14C Analysis P. Hanson, C. Swanston, D. Todd & J. Southon

    E-Print Network [OSTI]

    Post, Wilfred M.

    and the cumulative leachate containing dissolved organic carbon were analyzed for carbon and its 14C-signature. Leached with 120 cm3 H2O 3x 5-6g Q.prinus leaves Cumulative Leachate ~350 cm3 #12;15 OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY Leaching Results Mean leachate [C] was 378 µg cm-3 and did not differ

  4. Composite Membranes for CO2 Capture: High Performance Metal Organic Frameworks/Polymer Composite Membranes for Carbon Dioxide Capture

    SciTech Connect (OSTI)

    2010-07-01

    IMPACCT Project: A team of six faculty members at Georgia Tech are developing an enhanced membrane by fitting metal organic frameworks, compounds that show great promise for improved carbon capture, into hollow fiber membranes. This new material would be highly efficient at removing CO2 from the flue gas produced at coal-fired power plants. The team is analyzing thousands of metal organic frameworks to identify those that are most suitable for carbon capture based both on their ability to allow coal exhaust to pass easily through them and their ability to select CO2 from that exhaust for capture and storage. The most suitable frameworks would be inserted into the walls of the hollow fiber membranes, making the technology readily scalable due to their high surface area. This composite membrane would be highly stable, withstanding the harsh gas environment found in coal exhaust.

  5. EVOLUTIONARY AND GEOLOGIC CONSEQUENCES OF ORGANIC CARBON FIXING IN THE PRIMITIVE ANOXIC OCEAN

    E-Print Network [OSTI]

    Berry, W.B.N.

    2013-01-01

    fix carbon dioxide. The free source to energy relationshipsfree energy derived from use of hydrogen chemosynthesis sulfide as an energy source

  6. Carbon and Nitrogen Isotopic Signatures and Nitrogen Profile To Identify Adulteration in Organic Fertilizers

    E-Print Network [OSTI]

    Mazumder, Asit

    growth regulators such as hormones, livestock antibiotics, food additives, genetically modified organisms

  7. DISSOLVED CONCENTRATION LIMITS OF RADIOACTIVE ELEMENTS

    SciTech Connect (OSTI)

    NA

    2004-11-22

    The purpose of this study is to evaluate dissolved concentration limits (also referred to as solubility limits) of elements with radioactive isotopes under probable repository conditions, based on geochemical modeling calculations using geochemical modeling tools, thermodynamic databases, field measurements, and laboratory experiments. The scope of this modeling activity is to predict dissolved concentrations or solubility limits for 14 elements with radioactive isotopes (actinium, americium, carbon, cesium, iodine, lead, neptunium, plutonium, protactinium, radium, strontium, technetium, thorium, and uranium) important to calculated dose. Model outputs for uranium, plutonium, neptunium, thorium, americium, and protactinium are in the form of tabulated functions with pH and log (line integral) CO{sub 2} as independent variables, plus one or more uncertainty terms. The solubility limits for the remaining elements are either in the form of distributions or single values. The output data from this report are fundamental inputs for Total System Performance Assessment for the License Application (TSPA-LA) to determine the estimated release of these elements from waste packages and the engineered barrier system. Consistent modeling approaches and environmental conditions were used to develop solubility models for all of the actinides. These models cover broad ranges of environmental conditions so that they are applicable to both waste packages and the invert. Uncertainties from thermodynamic data, water chemistry, temperature variation, and activity coefficients have been quantified or otherwise addressed.

  8. Process for producing organic products containing silicon, hydrogen, nitrogen, and carbon by the direct reaction between elemental silicon and organic amines and products formed thereby

    DOE Patents [OSTI]

    Pugar, E.A.; Morgan, P.E.D.

    1988-04-04

    A process is disclosed for producing, at a low temperature, a high purity organic reaction product consisting essentially of silicon, hydrogen, nitrogen, and carbon. The process comprises reacting together a particulate elemental high purity silicon with a high purity reactive amine reactant in a liquid state at a temperature of from about O/degree/C up to about 300/degree/C. A high purity silicon carbide/silicon nitride ceramic product can be formed from this intermediate product, if desired, by heating the intermediate product at a temperature of from about 1200-1700/degree/C for a period from about 15 minutes up to about 2 hours or the organic reaction product may be employed in other chemical uses.

  9. Scaling impacts on environmental controls and spatial heterogeneity of soil organic carbon stocks

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Mishra, U.; Riley, W. J.

    2015-07-02

    The spatial heterogeneity of land surfaces affects energy, moisture, and greenhouse gas exchanges with the atmosphere. However, representing the heterogeneity of terrestrial hydrological and biogeochemical processes in Earth system models (ESMs) remains a critical scientific challenge. We report the impact of spatial scaling on environmental controls, spatial structure, and statistical properties of soil organic carbon (SOC) stocks across the US state of Alaska. We used soil profile observations and environmental factors such as topography, climate, land cover types, and surficial geology to predict the SOC stocks at a 50 m spatial scale. These spatially heterogeneous estimates provide a data setmore »with reasonable fidelity to the observations at a sufficiently high resolution to examine the environmental controls on the spatial structure of SOC stocks. We upscaled both the predicted SOC stocks and environmental variables from finer to coarser spatial scales (s = 100, 200, and 500 m and 1, 2, 5, and 10 km) and generated various statistical properties of SOC stock estimates. We found different environmental factors to be statistically significant predictors at different spatial scales. Only elevation, temperature, potential evapotranspiration, and scrub land cover types were significant predictors at all scales. The strengths of control (the median value of geographically weighted regression coefficients) of these four environmental variables on SOC stocks decreased with increasing scale and were accurately represented using mathematical functions (R2 = 0.83–0.97). The spatial structure of SOC stocks across Alaska changed with spatial scale. Although the variance (sill) and unstructured variability (nugget) of the calculated variograms of SOC stocks decreased exponentially with scale, the correlation length (range) remained relatively constant across scale. The variance of predicted SOC stocks decreased with spatial scale over the range of 50 m to ~ 500 m, and remained constant beyond this scale. The fitted exponential function accounted for 98 % of variability in the variance of SOC stocks. We found moderately accurate linear relationships between mean and higher-order moments of predicted SOC stocks (R2 ? 0.55–0.63). Current ESMs operate at coarse spatial scales (50–100 km), and are therefore unable to represent environmental controllers and spatial heterogeneity of high-latitude SOC stocks consistent with observations. We conclude that improved understanding of the scaling behavior of environmental controls and statistical properties of SOC stocks could improve ESM land model benchmarking and perhaps allow representation of spatial heterogeneity of biogeochemistry at scales finer than those currently resolved by ESMs.« less

  10. Scaling impacts on environmental controls and spatial heterogeneity of soil organic carbon stocks

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Mishra, U.; Riley, W. J.

    2015-01-27

    The spatial heterogeneity of land surfaces affects energy, moisture, and greenhouse gas exchanges with the atmosphere. However, representing heterogeneity of terrestrial hydrological and biogeochemical processes in earth system models (ESMs) remains a critical scientific challenge. We report the impact of spatial scaling on environmental controls, spatial structure, and statistical properties of soil organic carbon (SOC) stocks across the US state of Alaska. We used soil profile observations and environmental factors such as topography, climate, land cover types, and surficial geology to predict the SOC stocks at a 50 m spatial scale. These spatially heterogeneous estimates provide a dataset with reasonablemore »fidelity to the observations at a sufficiently high resolution to examine the environmental controls on the spatial structure of SOC stocks. We upscaled both the predicted SOC stocks and environmental variables from finer to coarser spatial scales (s = 100, 200, 500 m, 1, 2, 5, 10 km) and generated various statistical properties of SOC stock estimates. We found different environmental factors to be statistically significant predictors at different spatial scales. Only elevation, temperature, potential evapotranspiration, and scrub land cover types were significant predictors at all scales. The strengths of control (the median value of geographically weighted regression coefficients) of these four environmental variables on SOC stocks decreased with increasing scale and were accurately represented using mathematical functions (R2 = 0.83–0.97). The spatial structure of SOC stocks across Alaska changed with spatial scale. Although the variance (sill) and unstructured variability (nugget) of the calculated variograms of SOC stocks decreased exponentially with scale, the correlation length (range) remained relatively constant across scale. The variance of predicted SOC stocks decreased with spatial scale over the range of 50 to ~ 500 m, and remained constant beyond this scale. The fitted exponential function accounted for 98% of variability in the variance of SOC stocks. We found moderately-accurate linear relationships between mean and higher-order moments of predicted SOC stocks (R2 ~ 0.55–0.63). Current ESMs operate at coarse spatial scales (50–100 km), and are therefore unable to represent environmental controllers and spatial heterogeneity of high-latitude SOC stocks consistent with observations. We conclude that improved understanding of the scaling behavior of environmental controls and statistical properties of SOC stocks can improve ESM land model benchmarking and perhaps allow representation of spatial heterogeneity of biogeochemistry at scales finer than those currently resolved by ESMs.« less

  11. Changes in soil organic carbon storage predicted by Earth system models during the 21st century

    E-Print Network [OSTI]

    2013-01-01

    carbon changes in Earth system models K. E. O. Todd-Brown etcarbon changes in Earth system models K. E. O. Todd-Brown etDiscussion Paper CMIP5 Earth system models and comparison

  12. Changes in soil organic carbon storage predicted by Earth system models during the 21st century

    E-Print Network [OSTI]

    2013-01-01

    carbon changes in Earth system models K. E. O. Todd-Brown etcarbon changes in Earth system models K. E. O. Todd-Brown etcarbon changes in Earth system models K. E. O. Todd-Brown et

  13. Group of Microbes Change Dissolved

    E-Print Network [OSTI]

    Lovley, Derek

    is found in all water, even seawater, the use of these microbes to harvest gold does not make economic microbes are able to change dissolved gold into a more metallic form, using them to harvest gold isn't likely to be cost-effective. Photography by Araldo de Luca/CORBIS Ten years ago Derek Lovley

  14. Electrodeposited Manganese Oxides on Three-Dimensional Carbon Nanotube Substrate: Supercapacitive Behaviour in Aqueous and Organic Electrolytes

    SciTech Connect (OSTI)

    Nam,K.W.; Yang,X.

    2009-03-01

    Thin amorphous manganese oxide layers with a thickness of 3-5nm are electrodeposited on a carbon nanotube (CNT) film substrate that has a three-dimensional nanoporous structure (denoted asMnO2/CNT electrode). For the purpose of comparison, manganese oxide films are also electrodeposited on a flat Pt-coated Si wafer substrate (denoted as MnO2 film electrode). The pseudocapacitive properties of the MnO2 film and MnO2/CNT electrodes are examined in both aqueous electrolyte (1.0M KCl) and nonaqueousorganic electrolyte (1.0M LiClO4 in propylene carbonate). While both types of electrode showpseudocapacitive behaviour in the aqueous electrolyte, only the MnO2/CNT electrode does so in the organic electrolyte, due to its high oxide/electrolyte interfacial area and improved electron conduction through the CNT substrate. Compared with the MnO2 film electrode, the MnO2/CNT electrode shows a much higher specific capacitance and better high-rate capability, regardless of the electrolyte used.Use of the organic electrolyte results in a ?6 times higher specific energy compared with that obtained with the aqueous electrolyte, while maintaining a similar specific power. The construction of a threedimensional nanoporous network structure consisting of a thin oxide layer on a CNT film substrate at the nm scale and the use of an organic electrolyte are promising approaches to improving the specific energyof supercapacitors.

  15. An investigation of groundwater organics, soil minerals, and activated carbon on the complexation, adsorption, and separation of technetium-99

    SciTech Connect (OSTI)

    Gu, B.; Dowlen, K.E.

    1996-01-01

    This report summarizes studies on the interactions of technetium-99 (Tc) with different organic compounds and soil minerals under both oxidizing and reducing conditions. The report is divided into four parts and includes (1) effect of natural organic matter (NOM) on the complexation and solubility of Tc, (2) complexation between Tc and trichloroethylene (TCE) in aqueous solutions, (3) adsorption of Tc on soil samples from Paducah Gaseous Diffusion Plant (PGDP), and (4) adsorption and separation of Tc on activated carbon. Various experimental techniques were applied to characterize and identify Tc complexation with organic compounds and TCE, including liquid-liquid extraction, membrane filtration, size exclusion, and gel chromatography. Results indicate, within the experimental error, Tc (as pertechnetate, TcO{sub 4}) did not appear to form complexes with groundwater or natural organic matter under both atmospheric and reducing conditions. However, Tc can form complexes with certain organic compounds or specific functional groups such as salicylate. Tc did not appear to form complexes with TCE in aqueous solution.Both liquid-liquid extraction and high performance liquid chromatography (HPLC) gave no indication Tc was complexed with TCE. The correlations between Tc and TCE concentrations in monitoring wells at PGDP may be a coincidence because TCE was commonly used as a decontamination reagent. Once TCE and Tc entered the groundwater, they behaved similarly because both TcO{sub 4}{sup {minus}} and TCE are poorly adsorbed by soils. An effective remediation technique to remove TcO{sub 4}{sup {minus}} from PGDP contaminated groundwater is needed. One possibility is the use of an activated carbon adsorption technique developed in this study.

  16. Processes Affecting Agricultural Drainwater Quality and Organic Carbon Loads in California's Sacramento–San Joaquin Delta

    E-Print Network [OSTI]

    Deverel, Steven J.; Leighton, David A.; Finlay, Mark R.

    2007-01-01

    data collection and processing, Sacramento, California. Wu,of organic soils, Sacramento-San Joaquin Delta, California.CALFED Science Conference, Sacramento, California. Epstein,

  17. Geochemical Impacts of Carbon Dioxide, Brine, Trace Metal and Organic Leakage into an Unconfined, Oxidizing Limestone Aquifer

    SciTech Connect (OSTI)

    Bacon, Diana H. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Dai, Zhenxue [Los Alamos National Laboratory, Los Alamos, NM (United States); Zheng, Liange [Lawrence Berkeley National Laboratory, Berkeley, CA (United States)

    2014-12-31

    An important risk at CO2 storage sites is the potential for groundwater quality impacts. As part of a system to assess the potential for these impacts a geochemical scaling function has been developed, based on a detailed reactive transport model of CO2 and brine leakage into an unconfined, oxidizing carbonate aquifer. Stochastic simulations varying a number of geochemical parameters were used to generate a response surface predicting the volume of aquifer that would be impacted with respect to regulated contaminants. The brine was assumed to contain several trace metals and organic contaminants. Aquifer pH and TDS were influenced by CO2 leakage, while trace metal concentrations were most influenced by the brine concentrations rather than adsorption or desorption on calcite. Organic plume sizes were found to be strongly influenced by biodegradation.

  18. Geochemical Impacts of Carbon Dioxide, Brine, Trace Metal and Organic Leakage into an Unconfined, Oxidizing Limestone Aquifer

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bacon, Diana H.; Dai, Zhenxue; Zheng, Liange

    2014-12-31

    An important risk at CO2 storage sites is the potential for groundwater quality impacts. As part of a system to assess the potential for these impacts a geochemical scaling function has been developed, based on a detailed reactive transport model of CO2 and brine leakage into an unconfined, oxidizing carbonate aquifer. Stochastic simulations varying a number of geochemical parameters were used to generate a response surface predicting the volume of aquifer that would be impacted with respect to regulated contaminants. The brine was assumed to contain several trace metals and organic contaminants. Aquifer pH and TDS were influenced by CO2more »leakage, while trace metal concentrations were most influenced by the brine concentrations rather than adsorption or desorption on calcite. Organic plume sizes were found to be strongly influenced by biodegradation.« less

  19. Predicting pyrogenic organic matter mineralization from its initial properties and implications for carbon management

    E-Print Network [OSTI]

    Lehmann, Johannes

    for carbon management Thea Whitman, Kelly Hanley, Akio Enders, Johannes Lehmann Department of Crop and Soil to higher pyrolysis temperatures is more stable. Ó 2013 Elsevier Ltd. All rights reserved. 1. Introduction combustion or pyrolysis (Bird and Ascough, 2012). While PyC can be degraded both chemically and biologically

  20. Carbon oxidation state as a metric for describing the chemistry of atmospheric organic aerosol

    E-Print Network [OSTI]

    Kroll, Jesse

    A detailed understanding of the sources, transformations and fates of organic species in the environment is crucial because of the central roles that they play in human health, biogeochemical cycles and the Earth's climate. ...

  1. The influence of organic carbon on oxygen dynamics and bacterial sulfate reduction in inland shrimp ponds 

    E-Print Network [OSTI]

    Suplee, Michael Wayne

    1995-01-01

    Experiments conducted in saline aquaculture ponds demonstrated that organic matter was the primary factor influencing sediment sulfate reduction rates. Changes in sediment oxygen demand (SOD), sulfate reduction rates, and ...

  2. Organic carbon aerogels from the sol-gel polymerization of phenolic-furfural mixtures

    SciTech Connect (OSTI)

    Pekala, Richard W. (Pleasant Hill, CA)

    1998-04-28

    The sol-gel polymerization of a phenolic-furfural mixture in dilute solution leads to a highly cross-linked network that can be supercritically dried to form a high surface area foam. These porous materials have cell/pore sizes .ltoreq.1000 .ANG., and although they are dark brown in color, they can be classified as a new type of aerogel. The phenolic-furfural aerogel can be pyrolyzed in an inert atmosphere at 1050.degree. C. to produce carbon aerogels. This new aerogel may be used for thermal insulation, chromatographic packing, water filtration, ion-exchange, and carbon electrodes for energy storage devices, such as batteries and double-layer capacitors.

  3. Organic carbon aerogels from the sol-gel polymerization of phenolic-furfural mixtures

    DOE Patents [OSTI]

    Pekala, R.W.

    1998-04-28

    The sol-gel polymerization of a phenolic-furfural mixture in dilute solution leads to a highly cross-linked network that can be supercritically dried to form a high surface area foam. These porous materials have cell/pore sizes {<=}1000 {angstrom}, and although they are dark brown in color, they can be classified as a new type of aerogel. The phenolic-furfural aerogel can be pyrolyzed in an inert atmosphere at 1050 C to produce carbon aerogels. This new aerogel may be used for thermal insulation, chromatographic packing, water filtration, ion-exchange, and carbon electrodes for energy storage devices, such as batteries and double-layer capacitors. 8 figs.

  4. Large Magnetization at Carbon Surfaces

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

    Large Magnetization at Carbon Surfaces Large Magnetization at Carbon Surfaces Print Wednesday, 31 August 2011 00:00 From organic matter to pencil lead, carbon is a versatile...

  5. Effect of an organic molecular coating on control over the conductance of carbon nanotube channel

    SciTech Connect (OSTI)

    Bobrinetskiy, I. I.; Emelianov, A. V.; Nevolin, V. K. Romashkin, A. V.

    2014-12-15

    It is shown that the coating of carbon nanotubes with molecules with a constant dipole moment changes the conductance of the tubes due to a variation in the structure of energy levels that participate in charge transport. The I–V characteristics of the investigated structures exhibit significant dependence of the channel conductance on the gate potential. The observed memory effect of conductance level can be explained by the rearrangement of polar groups and molecules as a whole in an electric field. The higher the dipole moment per unit length and the weaker the intermolecular interaction, the faster the rearrangement process is.

  6. A New Organic Acid to Stimulate Deep Wells in Carbonate Reservoirs 

    E-Print Network [OSTI]

    Al-Douri, Ahmad F

    2014-05-28

    was obtained using both a phosphorous-based and iron-based catalyst. The rate of reaction of a 10 wt% solution of the new organic acid was measured using the rotating disk apparatus at temperatures up to 250°F. Low-permeability Indiana limestone (1-5 md...

  7. Paleoreconstruction of Particulate Organic Carbon Inputs to the High-Arctic Colville River Delta, Beaufort Sea, Alaska 

    E-Print Network [OSTI]

    Schreiner, Kathryn 1983-

    2013-01-09

    High Arctic permafrosted soils represent a massive sink in the global carbon cycle, accounting for twice as much carbon as what is currently stored as carbon dioxide in the atmosphere. However, with current warming trends this sink is in danger...

  8. Contribution of gas phase oxidation of volatile organic compounds to atmospheric carbon monoxide levels in two areas of the United States

    E-Print Network [OSTI]

    Dabdub, Donald

    - house gas, but also the hydroperoxide radical (HO2). HO2 converts nitric oxide to nitrogen dioxideContribution of gas phase oxidation of volatile organic compounds to atmospheric carbon monoxide. Chen, K. Carmody, S. Vutukuru, and D. Dabdub (2007), Contribution of gas phase oxidation of volatile

  9. Adsorption and desorption of atrazine and deethylatrazine by low organic carbon geologic materials

    SciTech Connect (OSTI)

    Roy, W.R.; Krapac, I.G. [Illinois State Geological Survey, Champaign, IL (United States)

    1994-05-01

    The adsorption and desorption of atrazine (2-chloro-4-ethylamino-6- isopropylamino-s-triazine) and a primary metabolite, deethylatrazine (2-amino-4-chloro-6-isopropylamino-s-triazine; DEA), by low organic C ({le} 3.3 g kg{sup -1}) materials were measured by batch-equilibrium techniques. The adsorbents were samples of glacial outwash sand, till, and stream sediments. The adsorption of both atrazine and DEA conformed to linear isotherms. The adsorption of atrazine by most of the absorbents yielded apparent K, values that were in excess of those based on surface agricultural soils. Adsorption correlated with only the pH of the sand-water suspensions. The desorption of atrazine was hysteretic under the conditions of the measurement. DEA had a lower affinity for the same adsorbents; the mean ratio of Kd values of DEA to those of atrazine was 0.37 {+-} 0.20. DEA adsorption did not correlate with organic C, surface area, clay content of the adsorbents, or with the pH of the suspensions. DEA adsorption, unlike atrazine, tended to be reversible. There was a linear relationship between the adsorption constants of atrazine and those of DEA. 40 refs., 8 figs., 3 tabs.

  10. Designer organisms for photosynthetic production of ethanol from carbon dioxide and water

    DOE Patents [OSTI]

    Lee, James Weifu (Knoxville, TN)

    2011-07-05

    The present invention provides a revolutionary photosynthetic ethanol production technology based on designer transgenic plants, algae, or plant cells. The designer plants, designer algae, and designer plant cells are created such that the endogenous photosynthesis regulation mechanism is tamed, and the reducing power (NADPH) and energy (ATP) acquired from the photosynthetic water splitting and proton gradient-coupled electron transport process are used for immediate synthesis of ethanol (CH.sub.3CH.sub.2OH) directly from carbon dioxide (CO.sub.2) and water (H.sub.2O). The ethanol production methods of the present invention completely eliminate the problem of recalcitrant lignocellulosics by bypassing the bottleneck problem of the biomass technology. The photosynthetic ethanol-production technology of the present invention is expected to have a much higher solar-to-ethanol energy-conversion efficiency than the current technology and could also help protect the Earth's environment from the dangerous accumulation of CO.sub.2 in the atmosphere.

  11. Carbon Dioxide Removal from Flue Gas Using Microporous Metal Organic Frameworks

    SciTech Connect (OSTI)

    David A Lesch

    2010-06-30

    UOP LLC, a Honeywell Company, in collaboration with Professor Douglas LeVan at Vanderbilt University (VU), Professor Adam Matzger at the University of Michigan (UM), Professor Randall Snurr at Northwestern University (NU), and Professor Stefano Brandani at the University of Edinburgh (UE), supported by Honeywell's Specialty Materials business unit and the Electric Power Research Institute (EPRI), have completed a three-year project to develop novel microporous metal organic frameworks (MOFs) and an associated vacuum-pressure swing adsorption (vPSA) process for the removal of CO{sub 2} from coal-fired power plant flue gas. The project leveraged the team's complementary capabilities: UOP's experience in materials development and manufacturing, adsorption process design and process commercialization; LeVan and Brandani's expertise in high-quality adsorption measurements; Matzger's experience in syntheis of MOFs and the organic components associated with MOFs; Snurr's expertise in molecular and other modeling; Honeywell's expertise in the manufacture of organic chemicals; and, EPRI's knowledge of power-generation technology and markets. The project was successful in that a selective CO{sub 2} adsorbent with good thermal stability and reasonable contaminant tolerance was discovered, and a low cost process for flue gas CO{sub 2} capture process ready to be evaluated further at the pilot scale was proposed. The team made significant progress toward the current DOE post-combustion research targets, as defined in a recent FOA issued by NETL: 90% CO{sub 2} removal with no more than a 35% increase in COE. The team discovered that favorable CO{sub 2} adsorption at more realistic flue gas conditions is dominated by one particular MOF structure type, M/DOBDC, where M designates Zn, Co, Ni, or Mg and DOBDC refers to the form of the organic linker in the resultant MOF structure, dioxybenzenedicarboxylate. The structure of the M/DOBDC MOFs consists of infinite-rod secondary building units bound by DOBDC resulting in 1D hexagonal pores about 11 angstroms in diameter. Surface areas range from 800 to 1500 sq m/g for the different MOFs. Mg/DOBDC outperformed all MOF and zeolite materials evaluated to date, with about 25 wt% CO{sub 2} captured by this MOF at flue gas conditions ({approx}0.13 atm CO{sub 2} pressure, 311K). In simulated flue gas without oxygen, the zero-length (ZLC) system was very useful in quickly simulating the effect of long term exposure to impurities on the MOFs. Detailed adsorption studies on MOF pellets have shown that water does not inhibit CO{sub 2} adsorption for MOFs as much as it does for typical zeolites. Moreover, some MOFs retain a substantial CO{sub 2} capacity even with a modest water loading at room temperature. Molecular modeling was a key activity in three areas of our earlier DOE/NETL-sponsored MOF-based research on CC. First, the team was able to effectively simulate CO{sub 2} and other gas adsorption isotherms for more than 20 MOFs, and the knowledge obtained was used to help predict new MOF structures that should be effective for CO{sub 2} adsorption at low pressure. The team also showed that molecular modeling could be utilized to predict the hydrothermal stability of a given MOF. Finally, the team showed that low moisture level exposure actually enhanced the CO{sub 2} adsorption performance of a particular MOF, HKUST-1.

  12. Method of separating lignocellulosic material into lignin, cellulose and dissolved sugars

    DOE Patents [OSTI]

    Black, S.K.; Hames, B.R.; Myers, M.D.

    1998-03-24

    A method is described for separating lignocellulosic material into (a) lignin, (b) cellulose, and (c) hemicellulose and dissolved sugars. Wood or herbaceous biomass is digested at elevated temperature in a single-phase mixture of alcohol, water and a water-immiscible organic solvent (e.g., a ketone). After digestion, the amount of water or organic solvent is adjusted so that there is phase separation. The lignin is present in the organic solvent, the cellulose is present in a solid pulp phase, and the aqueous phase includes hemicellulose and any dissolved sugars.

  13. Method of separating lignocellulosic material into lignin, cellulose and dissolved sugars

    DOE Patents [OSTI]

    Black, Stuart K. (Denver, CO); Hames, Bonnie R. (Westminster, CO); Myers, Michele D. (Dacono, CO)

    1998-01-01

    A method for separating lignocellulosic material into (a) lignin, (b) cellulose, and (c) hemicellulose and dissolved sugars. Wood or herbaceous biomass is digested at elevated temperature in a single-phase mixture of alcohol, water and a water-immiscible organic solvent (e.g., a ketone). After digestion, the amount of water or organic solvent is adjusted so that there is phase separation. The lignin is present in the organic solvent, the cellulose is present in a solid pulp phase, and the aqueous phase includes hemicellulose and any dissolved sugars.

  14. Deep-SeaResearch, 1974,Vol.21,pp. 481 to 488.PergamonPress.Printed in Great Britain. Dissolved hydrocarbons in the eastern Gulf of Mexico Loop Current

    E-Print Network [OSTI]

    Iliffe, Thomas M.

    hydrocarbons in the eastern Gulf of Mexico Loop Current and the Caribbean Sea THOMASM. ILIFFE*and JOHNA. CALDER---Concentrations of dissolved non-polar hydrocarbons extracted from waters taken at several stations and depths in the Gulf THEREhave been few studies of the dissolved hydrocarbons in seawater. BLU~R (1970) reported carbon numbers

  15. Geochemistry of silicate-rich rocks can curtail spreading of carbon dioxide in subsurface aquifers

    E-Print Network [OSTI]

    Cardoso, Silvana S. S.; Andres, J. T. H.

    2014-12-11

    in carbonate rocks the streaming of dissolved carbon dioxide persists, the chemical interactions in silicate-rich rocks may curb this transport drastically and even inhibit it altogether. These results challenge our view of carbon sequestration...

  16. Fractionation of Dissolved Solutes and Chromophoric Dissolved Organic Matter During Experimental Sea Ice Formation. 

    E-Print Network [OSTI]

    Smith, Stephanie 1990-

    2012-04-16

    concentrations were determined by Winkler titration using an autotitration system (Met- tler Toledo) with potentiometric equivalence point determination (Graneli and Graneli, 1991). Samples for oxygen determination were incubated in acid- washed and rinsed...

  17. On carbon footprints and growing energy use

    E-Print Network [OSTI]

    Oldenburg, C.M.

    2012-01-01

    On carbon footprints and growing energy use Curtis M.reductions in the carbon footprint of a growing organizationhis own organization's carbon footprint and answers this

  18. Rapid Field Measurement of Dissolved Inorganic Carbon Based on...

    Office of Scientific and Technical Information (OSTI)

    as well. National Energy Technology Laboratory - In-house Research USDOE FE Office of Clean Coal (FE-20) United States 2012-01-01 English Conference Medium: ED OSTI ID: 1061497,...

  19. MFR PAPER 1326 Use of Carbon Dioxide Dissolved in

    E-Print Network [OSTI]

    Shrimp (Panda/us spp.) HAROLD J. BARNETT, RICHARD W. NELSON, PATRICK J HUNTER, and HERMAN GRONINGER the RSW method (Barnett et al., 197 I), we found Figure I. -A typical north Pacific shrimp boat

  20. Rapid Field Measurement of Dissolved Inorganic Carbon Based on...

    Office of Scientific and Technical Information (OSTI)

    Bibtex Format Close 0 pages in this document matching the terms "" Search For Terms: Enter terms in the toolbar above to search the full text of this document for pages...

  1. Redistribution ofmulti-phase particulate organic carbon in a marine shelf and canyon system during an exceptional river flood: Effects of Typhoon Morakot on the Gaoping River–Canyon system

    E-Print Network [OSTI]

    Sparkes, Robert B.; Lin, In-Tian; Hovius, Niels; Galy, Albert; Liu, James T.; Xu, Xiaomei; Yang, Rick

    2015-02-25

    Volumetrically, turbidity currents are the prime suppliers of sediment to the deep sea, and conveyors of organic carbon from the terrestrial biosphere and submarine shelf into marine depositional basins. They result from complex processes of erosion...

  2. tributed by bicarbonate (HCO3 ) and carbon-

    E-Print Network [OSTI]

    Kalas, Paul G.

    - tinental margin "biogeochemical reactor." Sea- level change also affected carbon sequestration through such as phosphorous may have caused a glacial-interglacial redistri- bution of carbon sequestration between the margin1982 tributed by bicarbonate (HCO3 ­) and carbon- ate (CO3 2­) ions, the main forms of dissolved

  3. Impacts of engineering nanoparticles on dissolved organic matter assembly

    E-Print Network [OSTI]

    Chen, Chi-Shuo

    2012-01-01

    for the marine food web in the deep ocean, the possibilityfor the marine food web in the deep ocean, the possibility

  4. Process for coal liquefaction in staged dissolvers

    DOE Patents [OSTI]

    Roberts, George W. (Emmaus, PA); Givens, Edwin N. (Bethlehem, PA); Skinner, Ronald W. (Allentown, PA)

    1983-01-01

    There is described an improved liquefaction process by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coal is slurried with a pasting oil, passed through a preheater and at least two dissolvers in series in the presence of hydrogen-rich gases at elevated temperatures and pressures. Solids, including mineral ash and unconverted coal macerals, are separated from the condensed reactor effluent. In accordance with the improved process, the first dissolver is operated at a higher temperature than the second dissolver. This temperature sequence produces improved product selectivity and permits the incorporation of sufficient hydrogen in the solvent for adequate recycle operations.

  5. Low Temperature Deposition of Metal Oxide Thin Films in Supercritical Carbon Dioxide using Metal-organic Precursors

    E-Print Network [OSTI]

    Gougousi, Theodosia

    Semiconductor (CMOS) devices, [1,2] magnetic tunnel junctions, [3] and optical coatings.[4] Conventional such as electroplating, [6,7] electroless deposition, [8,9] and in supercritical carbon dioxide for the deposition

  6. Acetylenic carbon allotrope

    DOE Patents [OSTI]

    Lagow, Richard J. (6204 Shadow Mountain Dr., Austin, TX 78731)

    1998-01-01

    A fourth allotrope of carbon, an acetylenic carbon allotrope, is described. The acetylenic carbon allotropes of the present invention are more soluble than the other known carbon allotropes in many common organic solvents and possesses other desirable characteristics, e.g. high electron density, ability to burn cleanly, and electrical conductive properties. Many uses for this fourth allotrope are described herein.

  7. Acetylenic carbon allotrope

    DOE Patents [OSTI]

    Lagow, Richard J. (6204 Shadow Mountain Dr., Austin, TX 78731)

    1999-01-01

    A fourth allotrope of carbon, an acetylenic carbon allotrope, is described. The acetylenic carbon allotropes of the present invention are more soluble than the other known carbon allotropes in many common organic solvents and possesses other desirable characteristics, e.g. high electron density, ability to burn cleanly, and electrical conductive properties. Many uses for this fourth allotrope are described herein.

  8. Acetylenic carbon allotrope

    DOE Patents [OSTI]

    Lagow, R.J.

    1998-02-10

    A fourth allotrope of carbon, an acetylenic carbon allotrope, is described. The acetylenic carbon allotropes of the present invention are more soluble than the other known carbon allotropes in many common organic solvents and possesses other desirable characteristics, e.g. high electron density, ability to burn cleanly, and electrical conductive properties. Many uses for this fourth allotrope are described herein. 17 figs.

  9. FRONTIERS ARTICLE On the hydration and hydrolysis of carbon dioxide

    E-Print Network [OSTI]

    Cohen, Ronald C.

    FRONTIERS ARTICLE On the hydration and hydrolysis of carbon dioxide Alice H. England a,b , Andrew M August 2011 a b s t r a c t The dissolution of carbon dioxide in water and the ensuing hydrolysis, carbonic acid and dissolved CO2. The cor- responding carbon K-edge core-level spectra were calculated using

  10. Carbon dioxide fixation by Metallosphaera yellowstonensis and acidothermophilic iron-oxidizing microbial communities from Yellowstone National Park

    SciTech Connect (OSTI)

    Jennings, Ryan; Whitmore, Laura M.; Moran, James J.; Kreuzer, Helen W.; Inskeep, William P.

    2014-05-01

    The fixation of inorganic carbon (as carbon dioxide) has been documented in all three domains of life and results in the biosynthesis of a diverse suite of organic compounds that support the growth of heterotrophic organisms. The primary aim of this study was to assess the importance of carbon dioxide fixation in high-temperature Fe(III)-oxide mat communities and in pure cultures of one of the dominant Fe(II)-oxidizing organisms (Metallosphaera yellowstonensis strain MK1) present in situ. Protein-encoding genes of the complete 3-hydroxypropionate/4-hydroxybutyrate (3-HP/4-HB) carbon fixation pathway were identified in pure-cultures of M. yellowstonensis strain MK1. Metagenome sequencing from the same environments also revealed genes for the 3-HP/4-HB pathway belonging to M. yellowstonensis populations, as well as genes for a complete reductive TCA cycle from Hydrogenobaculum spp. (Aquificales). Stable isotope (13CO2) labeling was used to measure the fixation of CO2 by M. yellowstonensis strain MK1, and in ex situ assays containing live Fe(III)-oxide microbial mats. Results showed that M. yellowstonensis strain MK1 fixes CO2 via the 3-HP/4-HB pathway with a fractionation factor of ~ 2.5 ‰. Direct analysis of the 13C composition of dissolved inorganic C (DIC), dissolved organic C (DOC), landscape C and microbial mat C showed that mat C is comprised of both DIC and non-DIC sources. The estimated contribution of DIC carbon to biomass C (> ~ 35%) is reasonably consistent with the relative abundance of known chemolithoautotrophs and corresponding CO2 fixation pathways detected in metagenome sequence. The significance of DIC as a major source of carbon for Fe-oxide mat communities provides a foundation for examining microbial interactions in these systems that are dependent on the activity of autotrophic organisms such as Hydrogenobaculum and Metallosphaera spp.

  11. 1 Fully Printed Separated Carbon Nanotube Thin Film Transistor Circuits 2 and Its Application in Organic Light Emitting Diode Control

    E-Print Network [OSTI]

    Zhou, Chongwu

    attention. Recently, the 27 organic light emitting diode (OLED)3 has shed new light on this 28 realm in Organic Light Emitting Diode Control 3 Pochiang Chen,,|| Yue Fu,,|| Radnoosh Aminirad,,§ Chuan Wang, Jialu. Compared to LCD, OLED has lightweight, compatibility 29 with flexible plastic substrate, wide viewing

  12. Long-Term Trends in California Mobile Source Emissions and Ambient Concentrations of Black Carbon and Organic Aerosol

    E-Print Network [OSTI]

    Goldstein, Allen

    mobile source emissions of BC and OA (primary + secondary). Over time, as on-road engine emissions haveLong-Term Trends in California Mobile Source Emissions and Ambient Concentrations of Black Carbon, Berkeley, Berkeley, California 94720-1710, United States *S Supporting Information ABSTRACT: A fuel

  13. Thermodynamics and kinetics of hydrophobic organic compound sorption in natural sorbents and quantification of black carbon by electron microscopy

    E-Print Network [OSTI]

    Kuo, Dave Ta Fu, 1978-

    2010-01-01

    The sorption behaviors of hydrophobic organic compounds (HOCs) in sediments were investigated using pyrene. Native pyrene desorbed slowly, taking from weeks to months to equilibrate. The end-point data suggested that, at ...

  14. VARIATIONS IN THE DISSOLVED OXYGEN CONTENT OF INTRAGRAVEL WATER IN

    E-Print Network [OSTI]

    ^402: VARIATIONS IN THE DISSOLVED OXYGEN CONTENT OF INTRAGRAVEL WATER IN FOUR SPAWNING STREAMS IN THE DISSOLVED OXYGEN CONTENT OF INTRAGRAVEL WATER IN FOUR SPAWNING STREAMS OF SOUTHEASTERN ALASKA by William J Introduction 1 Sampling intragravel water for dissolved oxygen content 2 Obtaining water samples from

  15. The Arctic Ocean carbon sink G.A. MacGilchrist a,n

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    Carbon sequestration Biological pump a b s t r a c t We present observation based estimatesThe Arctic Ocean carbon sink G.A. MacGilchrist a,n , A.C. Naveira Garabato a , T. Tsubouchi b , S January 2014 Keywords: Arctic Ocean Dissolved inorganic carbon Carbon budget Air­sea carbon dioxide flux

  16. The Relationships of Particulate Matter and Particulate Organic Carbon with Hypoxic Conditions Along the Texas-Louisiana Shelf 

    E-Print Network [OSTI]

    Zuck, Nicole A

    2014-08-06

    riverine influences along the Texas- Louisiana coast and determine the limits of coastal and marine water masses [Dorado, 2011]. Determination of the d13C and d15N values of POM can give us information about discrete carbon and nitrogen sources... to the northern Gulf of Mexico [Dorado, 2011]. As water flows through an estuary, the ?13C derived from PO13C generally increases from -30‰ to -20‰ as salinity increases, however the ?15N from PO15N tends 28 to stay stable between 4‰ and 6‰ nearest...

  17. DIVISION S-10--WETLAND SOILS Turnover of Detrital Organic Carbon in a Nutrient-Impacted Everglades Marsh

    E-Print Network [OSTI]

    Florida, University of

    of organic C in plant and soil detrital pools along a P enrichment gradient in an Everglades marsh-30 cmdepth)], potential C mineralization decreased down gradient from the source of nutrient loading to WCA-2 metabolism via denitrification, as well as through NH3 volatilization (Reddy and D'Angelo, 1994). In contrast

  18. Use of carbonates for biological and chemical synthesis

    DOE Patents [OSTI]

    Rau, Gregory Hudson

    2014-09-09

    A system of using carbonates, especially water-insoluble or sparing soluble mineral carbonates, for maintaining or increasing dissolved inorganic carbon concentrations in aqueous media. In particular, the system generates concentrated dissolve inorganic carbon substrates for photosynthetic, chemosynthetic, or abiotic chemical production of carbonaceous or other compounds in solution. In some embodiments, the invention can also enhance the dissolution and retention of carbon dioxide in aqueous media, and can produce pH buffering capacity, metal ions, and heat, which can be beneficial to the preceding syntheses.

  19. Heterotrophic Soil Respiration in Warming Experiments: Using Microbial Indicators to Partition Contributions from Labile and Recalcitrant Soil Organic Carbon. Final Report

    SciTech Connect (OSTI)

    Bradford, M A; Melillo, J M; Reynolds, J F; Treseder, K K; Wallenstein, M D

    2010-06-10

    The central objective of the proposed work was to develop a genomic approach (nucleic acid-based) that elucidates the mechanistic basis for the observed impacts of experimental soil warming on forest soil respiration. The need to understand the mechanistic basis arises from the importance of such information for developing effective adaptation strategies for dealing with projected climate change. Specifically, robust predictions of future climate will permit the tailoring of the most effective adaptation efforts. And one of the greatest uncertainties in current global climate models is whether there will be a net loss of carbon from soils to the atmosphere as climate warms. Given that soils contain approximately 2.5 times as much carbon as the atmosphere, a net loss could lead to runaway climate warming. Indeed, most ecosystem models predict that climate warming will stimulate microbial decomposition of soil carbon, producing such a positive feedback to rising global temperatures. Yet the IPCC highlights the uncertainty regarding this projected feedback. The uncertainty arises because although warming-experiments document an initial increase in the loss of carbon from soils, the increase in respiration is short-lived, declining to control levels in a few years. This attenuation could result from changes in microbial physiology with temperature. We explored possible microbial responses to warming using experiments and modeling. Our work advances our understanding of how soil microbial communities and their activities are structured, generating insight into how soil carbon might respond to warming. We show the importance of resource partitioning in structuring microbial communities. Specifically, we quantified the relative abundance of fungal taxa that proliferated following the addition of organic substrates to soil. We added glycine, sucrose, cellulose, lignin, or tannin-protein to soils in conjunction with 3-bromo-deoxyuridine (BrdU), a nucleotide analog. Active microbes absorb BrdU from the soil solution; if they multiply in response to substrate additions, they incorporate the BrdU into their DNA. After allowing soils to incubate, we extracted BrdU-labeled DNA and sequenced the ITS regions of fungal rDNA. Fungal taxa that proliferated following substrate addition were likely using the substrate as a resource for growth. We found that the structure of active fungal communities varied significantly among substrates. The active fungal community under glycine was significantly different from those under other conditions, while the active communities under sucrose and cellulose were marginally different from each other and the control. These results indicate that the overall community structure of active fungi was altered by the addition of glycine, sucrose, and cellulose and implies that some fungal taxa respond to changes in resource availability. The community composition of active fungi is also altered by experimental warming. We found that glycine-users tended to increase under warming, while lignin-, tannin/protein-, and sucrose-users declined. The latter group of substrates requires extracellular enzymes for use, but glycine does not. It is possible that warming selects for fungal species that target, in particular, labile substrates. Linking these changes in microbial communities and resource partitioning to soil carbon dynamics, we find that substrate mineralization rates are, in general, significantly lower in soils exposed to long-term warming. This suggests that microbial use of organic substrates is impaired by warming. Yet effects are dependent on substrate identity. There are fundamental differences in the metabolic capabilities of the communities in the control and warmed soils. These differences might relate to the changes in microbial community composition, which appeared to be associated with groups specialized on different resources. We also find that functional responses indicate temperature acclimation of the microbial community. There are distinct seasonal patterns and to long-term soil warming, with

  20. Highly efficient nonprecious metal catalyst prepared with metal–organic framework in a continuous carbon nanofibrous network

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Shui, Jianglan; Chen, Chen; Grabstanowicz, Lauren; Zhao, Dan; Liu, Di -Jia

    2015-08-25

    Fuel cell vehicles, the only all-electric technology with a demonstrated >300 miles per fill travel range, use Pt as the electrode catalyst. The high price of Pt creates a major cost barrier for large-scale implementation of polymer electrolyte membrane fuel cells. Nonprecious metal catalysts (NPMCs) represent attractive low-cost alternatives. However, a significantly lower turnover frequency at the individual catalytic site renders the traditional carbon-supported NPMCs inadequate in reaching the desired performance afforded by Pt. Unconventional catalyst design aiming at maximizing the active site density at much improved mass and charge transports is essential for the next-generation NPMC. We report heremore »a method of preparing highly efficient, nanofibrous NPMC for cathodic oxygen reduction reaction by electrospinning a polymer solution containing ferrous organometallics and zeolitic imidazolate framework followed by thermal activation. The catalyst offers a carbon nanonetwork architecture made of microporous nanofibers decorated by uniformly distributed high-density active sites. In a single-cell test, the membrane electrode containing such a catalyst delivered unprecedented volumetric activities of 3.3 A?cm-3 at 0.9 V or 450 A?cm-3 extrapolated at 0.8 V, representing the highest reported value in the literature. Improved fuel cell durability was also observed.« less

  1. Highly efficient nonprecious metal catalyst prepared with metal–organic framework in a continuous carbon nanofibrous network

    SciTech Connect (OSTI)

    Shui, Jianglan; Chen, Chen; Grabstanowicz, Lauren; Zhao, Dan; Liu, Di -Jia

    2015-08-25

    Fuel cell vehicles, the only all-electric technology with a demonstrated >300 miles per fill travel range, use Pt as the electrode catalyst. The high price of Pt creates a major cost barrier for large-scale implementation of polymer electrolyte membrane fuel cells. Nonprecious metal catalysts (NPMCs) represent attractive low-cost alternatives. However, a significantly lower turnover frequency at the individual catalytic site renders the traditional carbon-supported NPMCs inadequate in reaching the desired performance afforded by Pt. Unconventional catalyst design aiming at maximizing the active site density at much improved mass and charge transports is essential for the next-generation NPMC. We report here a method of preparing highly efficient, nanofibrous NPMC for cathodic oxygen reduction reaction by electrospinning a polymer solution containing ferrous organometallics and zeolitic imidazolate framework followed by thermal activation. The catalyst offers a carbon nanonetwork architecture made of microporous nanofibers decorated by uniformly distributed high-density active sites. In a single-cell test, the membrane electrode containing such a catalyst delivered unprecedented volumetric activities of 3.3 A?cm-3 at 0.9 V or 450 A?cm-3 extrapolated at 0.8 V, representing the highest reported value in the literature. Improved fuel cell durability was also observed.

  2. This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research

    E-Print Network [OSTI]

    Jiang, Ganqing

    's personal copy Organic carbon isotope constraints on the dissolved organic carbon (DOC) reservoir: organic carbon isotopes dissolved organic carbon reservoir Ediacaran ocean oxidation cap carbonates South as resulting from the remineralization of a large dissolved organic carbon (DOC) reservoir capable of buffering

  3. Tuning the Gate Opening Pressure of Metal Organic Frameworks (MOFs) for the Selective Separation of Hydro-carbons

    E-Print Network [OSTI]

    Nijem, Nour; Canepa, Pieremanuele; Marti, Anne; Balkus,, Kenneth J; Thonhauser, T; Li, Jing; Chabal, Yves J; 10.1021/ja305754f

    2012-01-01

    Separation of hydrocarbons is one of the most energy demanding processes. The need to develop materials for the selective adsorption of hydrocarbons, under reasonable conditions, is therefore of paramount importance. This work unveils unexpected hydrocarbon selectivity in a flexible Metal Organic Framework (MOF), based on differences in their gate opening pressure. We show selectivity dependence on both chain length and specific framework-gas interaction. Combining Raman spectroscopy and theoretical van der Waals Density Functional (vdW-DF) calculations, the separation mechanisms governing this unexpected gate opening behavior are revealed.

  4. Does carbon dioxide pool or stream in the subsurface?

    E-Print Network [OSTI]

    Cardoso, Silvana S S

    2014-01-01

    Pools of carbon dioxide are found in natural geological accumulations and in engineered storage in saline aquifers. It has been thought that once this CO2 dissolves in the formation water, making it denser, convection streams would transport it efficiently to depth, but this may not be so. Here, we assess the impact of natural chemical reactions between the dissolved CO2 and the rock formation on the convection streams in the subsurface. We show that, while in carbonate rocks the streaming of dissolved carbon dioxide persists, the chemical interactions in silicate-rich rocks may curb this transport drastically and even inhibit it altogether. New laboratory experiments confirm the curtailing of convection by reaction. Wide and narrow streams of dense carbon-rich water are shut-off gradually as reaction strength increases until all transport of the pooled carbon dioxide occurs by slow molecular diffusion. These results show that the complex fluid dynamic and kinetic interactions between pooled carbon dioxide an...

  5. Method of making carbon nanotube composite materials

    DOE Patents [OSTI]

    O'Bryan, Gregory; Skinner, Jack L; Vance, Andrew; Yang, Elaine Lai; Zifer, Thomas

    2014-05-20

    The present invention is a method of making a composite polymeric material by dissolving a vinyl thermoplastic polymer, un-functionalized carbon nanotubes and hydroxylated carbon nanotubes and optionally additives in a solvent to make a solution and removing at least a portion of the solvent after casting onto a substrate to make thin films. The material has enhanced conductivity properties due to the blending of the un-functionalized and hydroxylated carbon nanotubes.

  6. New Mexico Associated-Dissolved Natural Gas, Reserves in Nonproducing...

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

    Reserves in Nonproducing Reservoirs, Wet (Billion Cubic Feet) New Mexico Associated-Dissolved Natural Gas, Reserves in Nonproducing Reservoirs, Wet (Billion Cubic Feet) Decade...

  7. ,"New Mexico Associated-Dissolved Natural Gas Proved Reserves...

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

    Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","New Mexico Associated-Dissolved Natural Gas Proved Reserves, Wet After Lease...

  8. ,"Federal Offshore, Gulf of Mexico, Texas Associated-Dissolved...

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

    Of Series","Frequency","Latest Data for" ,"Data 1","Federal Offshore, Gulf of Mexico, Texas Associated-Dissolved Natural Gas Proved Reserves, Wet After Lease...

  9. Molecular weight and humification index as predictors of adsorption for plant-and manure-derived dissolved

    E-Print Network [OSTI]

    Chorover, Jon

    -derived dissolved organic matter to goethite T. OHNO a , J. CHOROVER b , A. OMOIKE b & J. HUNT a a Department the sorption to goethite (a-FeOOH) of DOM extracted from: (i) above-ground biomass of wheat straw (Triticum with goethite. The multiple regression equation, based only on MWAP and HIX parameters, explained 76

  10. Changes in soil organic carbon under biofuel crops K R I S T I N A J . A N D E R S O N -T E I X E I R A *, S A R A H C . D AV I S w , M I C H A E L D . M A S T E R S * and

    E-Print Network [OSTI]

    DeLucia, Evan H.

    Changes in soil organic carbon under biofuel crops K R I S T I N A J . A N D E R S O N - T E I X E of growing biofuel crops will be the sequestration or release of carbon (C) in soil. Soil organic carbon (SOC) represents an important C sink in the lifecycle C balances of biofuels and strongly influences soil quality

  11. Method for dissolving delta-phase plutonium

    DOE Patents [OSTI]

    Karraker, David G. (1600 Sherwood Pl., SE., Aiken, SC 29801)

    1992-01-01

    A process for dissolving plutonium, and in particular, delta-phase plutonium. The process includes heating a mixture of nitric acid, hydroxylammonium nitrate (HAN) and potassium fluoride to a temperature between 40.degree. and 70.degree. C., then immersing the metal in the mixture. Preferably, the nitric acid has a concentration of not more than 2M, the HAN approximately 0.66M, and the potassium fluoride 0.1M. Additionally, a small amount of sulfamic acid, such as 0.1M can be added to assure stability of the HAN in the presence of nitric acid. The oxide layer that forms on plutonium metal may be removed with a non-oxidizing acid as a pre-treatment step.

  12. Global patterns and controls of soil organic carbon dynamics as simulated by multiple terrestrial biosphere models: Current status and future directions

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Tian, Hanqin; Lu, Chaoqun; Yang, Jia; Banger, Kamaljit; Huntzinger, Deborah N.; Schwalm, Christopher R.; Michalak, Anna M.; Cook, Robert; Ciais, Philippe; Hayes, Daniel; et al

    2015-06-05

    Soil is the largest organic carbon (C) pool of terrestrial ecosystems, and C loss from soil accounts for a large proportion of land-atmosphere C exchange. Therefore, a small change in soil organic C (SOC) can affect atmospheric carbon dioxide (CO?) concentration and climate change. In the past decades, a wide variety of studies have been conducted to quantify global SOC stocks and soil C exchange with the atmosphere through site measurements, inventories, and empirical/process-based modeling. However, these estimates are highly uncertain, and identifying major driving forces controlling soil C dynamics remains a key research challenge. This study has compiled century-longmore »(1901–2010) estimates of SOC storage and heterotrophic respiration (Rh) from 10 terrestrial biosphere models (TBMs) in the Multi-scale Synthesis and Terrestrial Model Intercomparison Project and two observation-based data sets. The 10 TBM ensemble shows that global SOC estimate ranges from 425 to 2111 Pg C (1 Pg = 10ą? g) with a median value of 1158 Pg C in 2010. The models estimate a broad range of Rh from 35 to 69 Pg C yr?ą with a median value of 51 Pg C yr?ą during 2001–2010. The largest uncertainty in SOC stocks exists in the 40–65°N latitude whereas the largest cross-model divergence in Rh are in the tropics. The modeled SOC change during 1901–2010 ranges from –70 Pg C to 86 Pg C, but in some models the SOC change has a different sign from the change of total C stock, implying very different contribution of vegetation and soil pools in determining the terrestrial C budget among models. The model ensemble-estimated mean residence time of SOC shows a reduction of 3.4 years over the past century, which accelerate C cycling through the land biosphere. All the models agreed that climate and land use changes decreased SOC stocks, while elevated atmospheric CO? and nitrogen deposition over intact ecosystems increased SOC stocks—even though the responses varied significantly among models. Model representations of temperature and moisture sensitivity, nutrient limitation, and land use partially explain the divergent estimates of global SOC stocks and soil C fluxes in this study. In addition, a major source of systematic error in model estimations relates to nonmodeled SOC storage in wetlands and peatlands, as well as to old C storage in deep soil layers.« less

  13. Effect of Organic Capping Layers over Monodisperse Platinum Nanoparticles upon Activity for Ethylene Hydrogenation and Carbon Monoxide Oxidation

    SciTech Connect (OSTI)

    Kuhn, John N.; Tsung, Chia-Kuang; Huang, Wenyu; Somorjai, Gabor A.

    2009-03-24

    The influence of oleylamine (OA), trimethyl tetradecyl ammonium bromide (TTAB), and polyvinlypyrrolidone (PVP) capping agents upon the catalytic properties of Pt/silica catalysts was evaluated. Pt nanoparticles that were 1.5 nm in size were synthesized by the same procedure (ethylene glycol reduction under basic conditions) with the various capping agents added afterward for stabilization. Before examining catalytic properties for ethylene hydrogenation and CO oxidation, the Pt NPs were deposited onto mesoporous silica (SBA-15) supports and characterized by transmission electron microscopy (TEM), H{sub 2} chemisorption, and elemental analysis (ICP-MS). PVP- and TTAB-capped Pt yielded mass-normalized reaction rates that decreased with increasing pretreatment temperature, and this trend was attributed to the partial coverage of the Pt surface with decomposition products from the organic capping agent. Once normalized to the Pt surface area, similar intrinsic activities were obtained regardless of the pretreatment temperature, which indicated no influence on the nature of the active sites. Consequently, a chemical probe technique using intrinsic activity for ethylene hydrogenation was demonstrated as an acceptable method for estimating the metallic surface areas of Pt. Amine (OA) capping exhibited a detrimental influence on the catalytic properties as severe deactivation and low activity were observed for ethylene hydrogenation and CO oxidation, respectively. These results were consistent with amine groups being strong poisons for Pt surfaces, and revealed the need to consider the effects of capping agents on the catalytic properties.

  14. Large Magnetization at Carbon Surfaces

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

    Large Magnetization at Carbon Surfaces Print From organic matter to pencil lead, carbon is a versatile element. Now, another use has been found: magnets. One would not expect pure...

  15. 4, 719745, 2007 Fluvial organic

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    changes and targets for carbon sequestration set by the Kyoto Protocol. In the UK the largest componentHESSD 4, 719­745, 2007 Fluvial organic carbon flux from an eroding peatland R. R. Pawson et al System Sciences Fluvial organic carbon flux from an eroding peatland catchment, southern Pennines, UK R

  16. Carbon ion pump for removal of carbon dioxide from combustion gas and other gas mixtures

    DOE Patents [OSTI]

    Aines, Roger D.; Bourcier, William L.

    2014-08-19

    A novel method and system of separating carbon dioxide from flue gas is introduced. Instead of relying on large temperature or pressure changes to remove carbon dioxide from a solvent used to absorb it from flue gas, the ion pump method, as disclosed herein, dramatically increases the concentration of dissolved carbonate ion in solution. This increases the overlying vapor pressure of carbon dioxide gas, permitting carbon dioxide to be removed from the downstream side of the ion pump as a pure gas. The ion pumping may be obtained from reverse osmosis, electrodialysis, thermal desalination methods, or an ion pump system having an oscillating flow in synchronization with an induced electric field.

  17. Carbon ion pump for removal of carbon dioxide from combustion gas and other gas mixtures

    DOE Patents [OSTI]

    Aines, Roger D. (Livermore, CA); Bourcier, William L. (Livermore, CA)

    2010-11-09

    A novel method and system of separating carbon dioxide from flue gas is introduced. Instead of relying on large temperature or pressure changes to remove carbon dioxide from a solvent used to absorb it from flue gas, the ion pump method, as disclosed herein, dramatically increases the concentration of dissolved carbonate ion in solution. This increases the overlying vapor pressure of carbon dioxide gas, permitting carbon dioxide to be removed from the downstream side of the ion pump as a pure gas. The ion pumping may be obtained from reverse osmosis, electrodialysis, thermal desalination methods, or an ion pump system having an oscillating flow in synchronization with an induced electric field.

  18. Rate and apparent quantum yield of photodissolution of sedimentary organic matter Margaret L. Estapa,a,b,1,* Lawrence M. Mayer,a and Emmanuel Boss b

    E-Print Network [OSTI]

    Boss, Emmanuel S.

    leads to O2 consumption, dissolved inorganic carbon (DIC) production, peroxide production (Estapa removal term in coastal carbon budgets that could be reduced by sediment resuspension and subsequent POC

  19. Australian climatecarbon cycle feedback reduced by soil black carbon

    E-Print Network [OSTI]

    Lehmann, Johannes

    Annual emissions of carbon dioxide from soil organic carbon are an order of magnitude greater than all anthropogenic carbon dioxide emissions taken together1 . Global warming is likely to increase the decomposition of soil organic carbon, and thus the release of carbon dioxide from soils2­5 , creating a positive

  20. ARM - Measurement - Organic Carbon Concentration

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow, Alaska Outreach Home Roomparticlecontent ARMgovMeasurementsNitrogen ARM

  1. Carbon Dioxide & Global Warming

    E-Print Network [OSTI]

    Miami, University of

    Carbon Dioxide & Global Warming University of MiaMi rosenstiel sChool of Marine anD atMospheriC s , organic carbon, and other chemicals that contribute to global warming in a variety of studies. DownCienCe 4600 rickenbacker Causeway Miami, florida 33149 http://www.rsmas.miami.edu the Chemistry of Global

  2. The marine biogeochemistry of dissolved and colloidal iron

    E-Print Network [OSTI]

    Fitzsimmons, Jessica Nicole

    2013-01-01

    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 ...

  3. The effects of dissolved methane upon liquid argon scintillation light

    E-Print Network [OSTI]

    Alexander, T

    In this paper we report on measurements of the effects of dissolved methane upon argon scintillation light. We monitor the light yield from an alpha source held 20 cm from a cryogenic photomultiplier tube (PMT) assembly ...

  4. Neptunium estimation in dissolver and high-level-waste solutions

    SciTech Connect (OSTI)

    Pathak, P.N.; Prabhu, D.R.; Kanekar, A.S.; Manchanda, V.K.

    2008-07-01

    This papers deals with the optimization of the experimental conditions for the estimation of {sup 237}Np in spent-fuel dissolver/high-level waste solutions using thenoyltrifluoroacetone as the extractant. (authors)

  5. Permafrost soils and carbon cycling

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ping, C. L.; Jastrow, J. D.; Jorgenson, M. T.; Michaelson, G. J.; Shur, Y. L.

    2015-02-05

    Knowledge of soils in the permafrost region has advanced immensely in recent decades, despite the remoteness and inaccessibility of most of the region and the sampling limitations posed by the severe environment. These efforts significantly increased estimates of the amount of organic carbon stored in permafrost-region soils and improved understanding of how pedogenic processes unique to permafrost environments built enormous organic carbon stocks during the Quaternary. This knowledge has also called attention to the importance of permafrost-affected soils to the global carbon cycle and the potential vulnerability of the region's soil organic carbon (SOC) stocks to changing climatic conditions. Inmore »this review, we briefly introduce the permafrost characteristics, ice structures, and cryopedogenic processes that shape the development of permafrost-affected soils, and discuss their effects on soil structures and on organic matter distributions within the soil profile. We then examine the quantity of organic carbon stored in permafrost-region soils, as well as the characteristics, intrinsic decomposability, and potential vulnerability of this organic carbon to permafrost thaw under a warming climate. Overall, frozen conditions and cryopedogenic processes, such as cryoturbation, have slowed decomposition and enhanced the sequestration of organic carbon in permafrost-affected soils over millennial timescales. Due to the low temperatures, the organic matter in permafrost soils is often less humified than in more temperate soils, making some portion of this stored organic carbon relatively vulnerable to mineralization upon thawing of permafrost.« less

  6. An Organic Carbon Budget for the Mississippi River Turbidity Plume and Plume Contributions to Air-sea CO2 Fluxes and

    E-Print Network [OSTI]

    Breed, Greg A.

    are the primary interface between terrestrial and oceanic environments and play a central role in linking terrestrial and marine carbon cycles. Annually, rivers transport 1 Gt total carbon to the world's oceans (e.g., Cai et al. 2003). Despite the known importance of RiOMar, the export pathways of OC

  7. PACIFICA (PACIFic ocean Interior CArbon) Database: A Data Synthesis Resource (NDP-92, ORNL/CDIAC-159)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Suzuki, T.; Ishii, M.; Aoyama, M. R; Christian, J. R.; Enyo, K.; Kawano, T.; Key, R. M.; Kosugi, N.; Kozyr, A.; Miller, L. A.; Murata, A.; Nakano, T.; Ono, T.; Saino, T.; Sasaki, K.; Sasano, D; Takatani, Y.; Wakita, M.; Sabine, C.

    PACIFICA (PACIFic ocean Interior CArbon) was an international collaborative project for synthesis of data on ocean interior carbon and its related parameters in the Pacific Ocean. The North Pacific Marine Science Organization (PICES), Section on Carbon and Climate (S-CC) supported the project. Hydrographic/hydrochemical datasets have been merged from a total of 272 cruises, including those from cruises conducted between the late 1980s and 2000 but not included in GLODAP, as well as CLIVAR/CO2 Repeat Hydrography datasets from the 2000s. Adjustments were calculated to account for analytical offsets in dissolved inorganic carbon, total alkalinity, salinity, oxygen, and nutrients (nitrate and nitrite, phosphate, and silicic acid) for each cruise as a result of the secondary quality control procedure, based on crossover analysis using data from deep layers (Tanhua et al., 2010). A total of 59 adjusted datasets from Line P off the west coast of Canada were also merged. Finally, the authors have produced the adjusted PACIFICA database that consists of datasets from a total of 306 cruises that also includes 34 datasets from WOCE Hydrographic Program cruises in the Pacific Ocean conducted in the 1990s. The PACIFICA database is available free of charge as a numeric data package (NDP-92) from the Carbon Dioxide Information Analysis Center (CDIAC) and the primary PACIFICA data site at pacifica.pices.jp. The NDP consists of the original cruise data files, adjusted data product, and the documentation.

  8. ORNL researchers improve soil carbon cycling models | ornl.gov

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

    and releases carbon into the soil. Enzymes released by microbes in the soil degrade the organic matter, releasing carbon molecules, which the microbes absorb as food. Eventually,...

  9. Sorted Single-Walled Carbon Nanotube Films for Transparent Electrodes...

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

    Sorted Single-Walled Carbon Nanotube Films for Transparent Electrodes in Organic Solar Cells Home > Research > ANSER Research Highlights > Sorted Single-Walled Carbon Nanotube...

  10. PRODUCTION OF CARBON PRODUCTS USING A COAL EXTRACTION PROCESS

    SciTech Connect (OSTI)

    Dady Dadyburjor; Philip R. Biedler; Chong Chen; L. Mitchell Clendenin; Manoj Katakdaunde; Elliot B. Kennel; Nathan D. King; Liviu Magean; Peter G. Stansberry; Alfred H. Stiller; John W. Zondlo

    2004-08-31

    This Department of Energy National Energy Technology Laboratory sponsored project developed carbon products, using mildly hydrogenated solvents to extract the organic portion of coal to create synthetic pitches, cokes, carbon foam and carbon fibers. The focus of this effort was on development of lower cost solvents, milder hydrogenation conditions and improved yield in order to enable practical production of these products. This technology is needed because of the long-term decline in production of domestic feedstocks such as petroleum pitch and coal tar pitch. Currently, carbon products represents a market of roughly 5 million tons domestically, and 19 million tons worldwide. Carbon products are mainly derived from feedstocks such as petroleum pitch and coal tar pitch. The domestic supply of petroleum pitch is declining because of the rising price of liquid fuels, which has caused US refineries to maximize liquid fuel production. As a consequence, the long term trend has a decline in production of petroleum pitch over the past 20 years. The production of coal tar pitch, as in the case of petroleum pitch, has likewise declined significantly over the past two decades. Coal tar pitch is a byproduct of metallurgical grade coke (metcoke) production. In this industry, modern metcoke facilities are recycling coal tar as fuel in order to enhance energy efficiency and minimize environmental emissions. Metcoke production itself is dependent upon the production requirements for domestic steel. Hence, several metcoke ovens have been decommissioned over the past two decades and have not been replaced. As a consequence sources of coal tar are being taken off line and are not being replaced. The long-term trend is a reduction in coal tar pitch production. Thus import of feedstocks, mainly from Eastern Europe and China, is on the rise despite the relatively large transportation cost. To reverse this trend, a new process for producing carbon products is needed. The process must be economically competitive with current processes, and yet be environmentally friendly as well. The solvent extraction process developed uses mild hydrogenation of low cost oils to create powerful solvents that can dissolve the organic portion of coal. The insoluble portion, consisting mainly of mineral matter and fixed carbon, is removed via centrifugation or filtration, leaving a liquid solution of coal chemicals and solvent. This solution can be further refined via distillation to meet specifications for products such as synthetic pitches, cokes, carbon foam and fibers. The most economical process recycles 85% of the solvent, which itself is obtained as a low-cost byproduct from industrial processes such as coal tar or petroleum refining. Alternatively, processes have been developed that can recycle 100% of the solvent, avoiding any need for products derived from petroleum or coal tar.

  11. Estuaries Vol. 20, No. 2, p. 381-390 June 1997 Carbon Dioxide Concentration and Atmospheric

    E-Print Network [OSTI]

    Cole, Jonathan J.

    should be net sources of carbon dioxide to the atmosphere or should transport excess CO, (as either COEstuaries Vol. 20, No. 2, p. 381-390 June 1997 Carbon Dioxide Concentration and Atmospheric Hudson, or total dissolved inorganic carbon [DIG] ) into the coastal zone. Exchanges of CO, between the water

  12. Preservation and detection of microstructural and taxonomic correlations in the carbon isotopic compositions

    E-Print Network [OSTI]

    Meyers, Stephen R.

    published carbonate carbon isotope data can be used to estimate the d13 C of the original dissolvedPreservation and detection of microstructural and taxonomic correlations in the carbon isotopic of Earth and Space Sciences, Center for the Study of Evolution and the Origin of Life, and Molecular

  13. c0011 Carbon Isotope Stratigraphy M.R. Saltzman and E. Thomas

    E-Print Network [OSTI]

    Chapter 11 c0011 Carbon Isotope Stratigraphy M.R. Saltzman and E. Thomas Chapter Outline 11.1. Principles of Carbon Isotope Stratigraphy 221 11.2. Spatial Heterogeneity of d13C of Dissolved Inorganic STRATIGRAPHY p0015 The potential of marine carbonate d13 C values to date and correlate rocks relies

  14. Role of natural organic matter in governing the bioavailability of toxic metals to american oysters 

    E-Print Network [OSTI]

    Haye, Jennifer Marcelle

    2006-08-16

    Colloidal macromolecular organic matter (COM), which makes up a large portion of the bulk dissolved organic matter (DOM) in marine environments, has the capability to modify the bioavailability of potentially toxic metals ...

  15. Role of added carbon in the transformation of surplus soil nitrate-nitrogen to organic forms in an intensively managed calcareous soil

    E-Print Network [OSTI]

    2009-01-01

    effect of carbon substrates. Soil Biol. Biochem. 36: Myroldof bacteria and fungi in nitrate assimilation in soil.Soil Biol. Biochem. 39: 1737-1743. Stange CF, Spott O, Apelt

  16. The Importance of Carbon Footprint Estimation Boundaries

    E-Print Network [OSTI]

    Kammen, Daniel M.

    The Importance of Carbon Footprint Estimation Boundaries H . S C O T T M A T T H E W S , C H R I and organizations are pursuing "carbon footprint" projects to estimate their own contributions to global climate change. Protocol definitions from carbon registries help organizations analyze their footprints

  17. 2009 PILOT SCALE FLUIDIZED BED STEAM REFORMING TESTING USING THE THOR (THERMAL ORGANIC REDUCTION) PROCESS: ANALYTICAL RESULTS FOR TANK 48H ORGANIC DESTRUCTION - 10408

    SciTech Connect (OSTI)

    Williams, M.; Jantzen, C.; Burket, P.; Crawford, C.; Daniel, G.; Aponte, C.; Johnson, C.

    2009-12-28

    The Savannah River Site (SRS) must empty the contents of Tank 48H, a 1.3 million gallon Type IIIA HLW storage tank, to return this tank to service. The tank contains organic compounds, mainly potassium tetraphenylborate that cannot be processed downstream until the organic components are destroyed. The THOR{reg_sign} Treatment Technologies (TTT) Fluidized Bed Steam Reforming (FBSR) technology, herein after referred to as steam reforming, has been demonstrated to be a viable process to remove greater than 99.9% of the organics from Tank 48H during various bench scale and pilot scale tests. These demonstrations were supported by Savannah River Remediation (SRR) and the Department of Energy (DOE) has concurred with the SRR recommendation to proceed with the deployment of the FBSR technology to treat the contents of Tank 48H. The Savannah River National Laboratory (SRNL) developed and proved the concept with non-radioactive simulants for SRR beginning in 2003. By 2008, several pilot scale campaigns had been completed and extensive crucible testing and bench scale testing were performed in the SRNL Shielded Cells using Tank 48H radioactive sample. SRNL developed a Tank 48H non-radioactive simulant complete with organic compounds, salt, and metals characteristic of those measured in a sample of the radioactive contents of Tank 48H. FBSR Pilot Scaled Testing with the Tank 48H simulant has demonstrated the ability to remove greater than 98% of the nitrites and greater than 99.5% of the nitrates from the Tank 48H simulant, and to form a solid product that is primarily alkali carbonate. The alkali carbonate is soluble and, thus, amenable to pumping as a liquid to downstream facilities for processing. The FBSR technology was demonstrated in October of 2006 in the Engineering Scale Test Demonstration (ESTD) pilot scale steam reformer at the Hazen Research Inc. (HRI) facility in Golden, CO. Additional ESTD tests were completed in 2008 and in 2009 that further demonstrated the TTT steam reforming process ability to destroy organics in the Tank 48 simulant and produce a soluble carbonate waste form. The ESTD was operated at varying feed rates and Denitration and Mineralization Reformer (DMR) temperatures, and at a constant Carbon Reduction Reformer (CRR) temperature of 950 C. The process produced a dissolvable carbonate product suitable for processing downstream. ESTD testing was performed in 2009 at the Hazen facility to demonstrate the long term operability of an integrated FBSR processing system with carbonate product and carbonate slurry handling capability. The final testing demonstrated the integrated TTT FBSR capability to process the Tank 48 simulant from a slurry feed into a greater than 99.9% organic free and primarily dissolved carbonate FBSR product slurry. This paper will discuss the SRNL analytical results of samples analyzed from the 2008 and 2009 THOR{reg_sign} steam reforming ESTD performed with Tank 48H simulant at HRI in Golden, Colorado. The final analytical results will be compared to prior analytical results from samples in terms of organic, nitrite, and nitrate destruction.

  18. Simulation Analysis for HB-Line Dissolver Mixing

    SciTech Connect (OSTI)

    Lee, S

    2006-03-22

    In support of the HB-Line Engineering agitator mixing project, flow pattern calculations have been made for a 90{sup o} apart and helical pitch agitator submerged in a flat tank containing dissolver baskets. The work is intended to determine maximum agitator speed to keep the dissolver baskets from contacting the agitator for the nominal tank liquid level. The analysis model was based on one dissolver basket located on the bottom surface of the flat tank for a conservative estimate. The modeling results will help determine acceptable agitator speeds and tank liquid levels to ensure that the dissolver basket is kept from contacting the agitator blade during HB-Line dissolver tank operations. The numerical modeling and calculations have been performed using a computational fluid dynamics approach. Three-dimensional steady-state momentum and continuity equations were used as the basic equations to estimate fluid motion driven by an agitator with four 90{sup o} pitched blades or three flat blades. Hydraulic conditions were fully turbulent (Reynolds number about 1 x 10{sup 5}). A standard two-equation turbulence model ({kappa},{var_epsilon}), was used to capture turbulent eddy motion. The commercial finite volume code, Fluent [5], was used to create a prototypic geometry file with a non-orthogonal mesh. Hybrid meshing was used to fill the computational region between the round-edged tank bottom and agitator regions. The nominal calculations and a series of sensitivity runs were made to investigate the impact of flow patterns on the lifting behavior of the dissolver basket. At high rotational speeds and low tank levels, local turbulent flow reaches the critical condition for the dissolver basket to be picked up from the tank floor and to touch the agitator blades during the tank mixing operations. This is not desirable in terms of mixing performance. The modeling results demonstrate that the flow patterns driven by the agitators considered here are not strong enough to lift up the dissolver basket for the agitator speeds up to 2500 rpm. The results also show that local velocity magnitudes for the three-blade flat plate agitator are at maximum three times smaller than the helical fourblade one. Table 5 and Table 6 summarize the results.

  19. Process for separating dissolved solids from a liquid using an anti-solvent and multiple effect evaporators

    DOE Patents [OSTI]

    Daniels, E.J.; Jody, B.J.; Bonsignore, P.V.

    1994-07-19

    A process and system are disclosed for treating aluminum salt cake containing water soluble halide salts by contacting the salt cake with water to dissolve water soluble halide salts forming a saturated brine solution. Transporting a portion of about 25% of the saturated brine solution to a reactor and introducing into the saturated brine solution at least an equal volume of a water-miscible low-boiling organic material such as acetone to precipitate a portion of the dissolved halide salts forming a three-phase mixture of an aqueous-organic-salt solution phase and a precipitated salt phase and an organic rich phase. The precipitated salt phase is separated from the other phases and the organic rich phase is recycled to the reactor. The remainder of the saturated brine solution is sent to a multiple effect evaporator having a plurality of stages with the last stage thereof producing low grade steam which is used to boil off the organic portion of the solution which is recycled. 3 figs.

  20. Process for separating dissolved solids from a liquid using an anti-solvent and multiple effect evaporators

    DOE Patents [OSTI]

    Daniels, Edward J. (Oak Lawn, IL); Jody, Bassam J. (Chicago, IL); Bonsignore, Patrick V. (Channahon, IL)

    1994-01-01

    A process and system for treating aluminum salt cake containing water soluble halide salts by contacting the salt cake with water to dissolve water soluble halide salts forming a saturated brine solution. Transporting a portion of about 25% of the saturated brine solution to a reactor and introducing into the saturated brine solution at least an equal volume of a water-miscible low-boiling organic material such as acetone to precipitate a portion of the dissolved halide salts forming a three-phase mixture of an aqueous-organic-salt solution phase and a precipitated salt phase and an organic rich phase. The precipitated salt phase is separated from the other phases and the organic rich phase is recycled to the reactor. The remainder of the saturated brine solution is sent to a multiple effect evaporator having a plurality of stages with the last stage thereof producing low grade steam which is used to boil off the organic portion of the solution which is recycled.

  1. A Physically Based Framework for Modelling the Organic Fractionation of Sea Spray Aerosol from Bubble Film Langmuir Equilibria

    SciTech Connect (OSTI)

    Burrows, Susannah M.; Ogunro, O.; Frossard, Amanda; Russell, Lynn M.; Rasch, Philip J.; Elliott, S.

    2014-12-19

    The presence of a large fraction of organic matter in primary sea spray aerosol (SSA) can strongly affect its cloud condensation nuclei activity and interactions with marine clouds. Global climate models require new parameterizations of the SSA composition in order to improve the representation of these processes. Existing proposals for such a parameterization use remotely-sensed chlorophyll-a concentrations as a proxy for the biogenic contribution to the aerosol. However, both observations and theoretical considerations suggest that existing relationships with chlorophyll-a, derived from observations at only a few locations, may not be representative for all ocean regions. We introduce a novel framework for parameterizing the fractionation of marine organic matter into SSA based on a competitive Langmuir adsorption equilibrium at bubble surfaces. Marine organic matter is partitioned into classes with differing molecular weights, surface excesses, and Langmuir adsorption parameters. The classes include a lipid-like mixture associated with labile dissolved organic carbon (DOC), a polysaccharide-like mixture associated primarily with semi-labile DOC, a protein-like mixture with concentrations intermediate between lipids and polysaccharides, a processed mixture associated with recalcitrant surface DOC, and a deep abyssal humic-like mixture. Box model calculations have been performed for several cases of organic adsorption to illustrate the underlying concepts. We then apply the framework to output from a global marine biogeochemistry model, by partitioning total dissolved organic carbon into several classes of macromolecule. Each class is represented by model compounds with physical and chemical properties based on existing laboratory data. This allows us to globally map the predicted organic mass fraction of the nascent submicron sea spray aerosol. Predicted relationships between chlorophyll-\\textit{a} and organic fraction are similar to existing empirical parameterizations, but can vary between biologically productive and non-productive regions, and seasonally within a given region. Major uncertainties include the bubble film thickness at bursting and the variability of organic surfactant activity in the ocean, which is poorly constrained. In addition, marine colloids and cooperative adsorption of polysaccharides may make important contributions to the aerosol, but are not included here. This organic fractionation framework is an initial step towards a closer linking of ocean biogeochemistry and aerosol chemical composition in Earth system models. Future work should focus on improving constraints on model parameters through new laboratory experiments or through empirical fitting to observed relationships in the real ocean and atmosphere, as well as on atmospheric implications of the variable composition of organic matter in sea spray.

  2. Organic electronic devices with multiple solution-processed layers

    DOE Patents [OSTI]

    Forrest, Stephen R.; Lassiter, Brian E.; Zimmerman, Jeramy D.

    2015-08-04

    A method of fabricating a tandem organic photosensitive device involves depositing a first layer of an organic electron donor type material film by solution-processing of the organic electron donor type material dissolved in a first solvent; depositing a first layer of an organic electron acceptor type material over the first layer of the organic electron donor type material film by a dry deposition process; depositing a conductive layer over the interim stack by a dry deposition process; depositing a second layer of the organic electron donor type material over the conductive layer by solution-processing of the organic electron donor type material dissolved in a second solvent, wherein the organic electron acceptor type material and the conductive layer are insoluble in the second solvent; depositing a second layer of an organic electron acceptor type material over the second layer of the organic electron donor type material film by a dry deposition process, resulting in a stack.

  3. Slurried solid media for simultaneous water purification and carbon dioxide removal from gas mixtures

    DOE Patents [OSTI]

    Aines, Roger D.; Bourcier, William L.; Viani, Brian

    2013-01-29

    A slurried solid media for simultaneous water purification and carbon dioxide removal from gas mixtures includes the steps of dissolving the gas mixture and carbon dioxide in water providing a gas, carbon dioxide, water mixture; adding a porous solid media to the gas, carbon dioxide, water mixture forming a slurry of gas, carbon dioxide, water, and porous solid media; heating the slurry of gas, carbon dioxide, water, and porous solid media producing steam; and cooling the steam to produce purified water and carbon dioxide.

  4. Clathrate hydrates in frozen confections : formation by carbon dioxide flash freezing and behavior during distribution and consumption

    E-Print Network [OSTI]

    Peters, Teresa Baker, 1981-

    2009-01-01

    Carbonated frozen foods are not common on the market due to the limited liquid water available to dissolve CO? . CO? clathrate hydrates can change this because CO? is trapped in crystalline water. The CO? flash-freezing ...

  5. Processes for preparing carbon fibers using sulfur trioxide in a halogenated solvent

    DOE Patents [OSTI]

    Patton, Jasson T.; Barton, Bryan E.; Bernius, Mark T.; Chen, Xiaoyun; Hukkanen, Eric J.; Rhoton, Christina A.; Lysenko, Zenon

    2015-12-29

    Disclosed here are processes for preparing carbonized polymers (preferably carbon fibers), comprising sulfonating a polymer with a sulfonating agent that comprises SO.sub.3 dissolved in a solvent to form a sulfonated polymer; treating the sulfonated polymer with a heated solvent, wherein the temperature of the solvent is at least 95.degree. C.; and carbonizing the resulting product by heating it to a temperature of 500-3000.degree. C. Carbon fibers made according to these methods are also disclosed herein.

  6. Carbon sequestration

    E-Print Network [OSTI]

    Carbon sequestration is the process of capture and long-term storage of atmospheric carbon dioxide (CO 2).[1] Carbon sequestration describes long-term storage of carbon dioxide or other forms of carbon to either mitigate or defer global warming and avoid ...

  7. Controls on black carbon storage in soils

    E-Print Network [OSTI]

    Czimczik, Claudia I; Masiello, Caroline A

    2007-01-01

    Physical and chemical protection of soil organic carbonin three agricultural soils with different contents ofcalcium carbonate, Aust. J. Soil Res. , 38, 1005 – 1016.

  8. Improving carbon fixation pathways

    SciTech Connect (OSTI)

    Ducat, DC; Silver, PA

    2012-08-01

    A recent resurgence in basic and applied research on photosynthesis has been driven in part by recognition that fulfilling future food and energy requirements will necessitate improvements in crop carbon-fixation efficiencies. Photosynthesis in traditional terrestrial crops is being reexamined in light of molecular strategies employed by photosynthetic microbes to enhance the activity of the Calvin cycle. Synthetic biology is well-situated to provide original approaches for compartmentalizing and enhancing photosynthetic reactions in a species independent manner. Furthermore, the elucidation of alternative carbon-fixation routes distinct from the Calvin cycle raises possibilities that novel pathways and organisms can be utilized to fix atmospheric carbon dioxide into useful materials.

  9. Methods and systems for chemoautotrophic production of organic compounds

    DOE Patents [OSTI]

    Fischer, Curt R.; Che, Austin J.; Shetty, Reshma P.; Kelly, Jason R.

    2013-01-08

    The present disclosure identifies pathways, mechanisms, systems and methods to confer chemoautotrophic production of carbon-based products of interest, such as sugars, alcohols, chemicals, amino acids, polymers, fatty acids and their derivatives, hydrocarbons, isoprenoids, and intermediates thereof, in organisms such that these organisms efficiently convert inorganic carbon to organic carbon-based products of interest using inorganic energy, such as formate, and in particular the use of organisms for the commercial production of various carbon-based products of interest.

  10. Effect of dissolved CO2 on a shallow groundwater system: A controlled...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Effect of dissolved CO2 on a shallow groundwater system: A controlled release experiment Citation Details In-Document Search Title: Effect of dissolved CO2 on a...

  11. Carbon dynamics in arctic vegetation 

    E-Print Network [OSTI]

    Street, Lorna Elizabeth

    2011-11-24

    Rapid climate change in Arctic regions is of concern due to important feedbacks between the Arctic land surface and the global climate system. A large amount of organic carbon (C) is currently stored in Arctic soils; if ...

  12. Sequestration of Dissolved CO2 in the Oriskany Formation

    SciTech Connect (OSTI)

    Dilmore, R.M.; Allen, D.E. (Salem State College, Salem, MA); McCarthy-Jones, J.R.; Hedges, S.W.; Soong, Yee

    2008-04-15

    Experiments were conducted to determine the solubility of CO2 in a natural brine solution of the Oriskany formation under elevated temperature and pressure conditions. These data were collected at temperatures of 22 and 75 °C and pressures between 100 and 450 bar. Experimentally determined data were compared with CO2 solubility predictions using a model developed by Duan and Sun (Chem. Geol. 2003, 193, 257-271). Model results compare well with Oriskany brine CO2 solubility data collected experimentally, suggesting that the Duan and Sun model is a reliable tool for estimating solution CO2 capacity in high salinity aquifers in the temperature and pressure range evaluated. The capacity for the Oriskany formation to sequester dissolved CO2 was calculated using results of the solubility models, estimation of the density of CO2 saturated brine, and available geographic information system (GIS) information on the formation depth and thickness. Results indicate that the Oriskany formation can hold approximately 0.36 gigatonnes of dissolved CO2 if the full basin is considered. When only the region where supercritical CO2 can exist (temperatures greater than 31° C and pressures greater than 74 bar) is considered, the capacity of the Oriskany formation to sequester dissolved CO2 is 0.31 gigatonnes. The capacity estimate considering the potential to sequester free-phase supercritical CO2 if brine were displaced from formation pore space is 8.8 gigatonnes in the Oriskany formation.

  13. The effect of organic carbon on fixed nitrogen loss in the eastern tropical South Pacific and Arabian Sea oxygen deficient zones

    E-Print Network [OSTI]

    Ward, Bess

    Oceanography Division, National Institute of Oceanography, Dona Paula, Goa, India Abstract The three major investigated the response of N loss in the ETSP and AS ODZs to additions of organic matter in the form). In the ETSP ODZ, the addition of glucose stimulated denitrification (1.6-fold increase after 5 d

  14. Mineralization of ancient carbon in the subsurface of riparian forests Noel P. Gurwick,1,2

    E-Print Network [OSTI]

    Gold, Art

    Mineralization of ancient carbon in the subsurface of riparian forests Noel P. Gurwick,1,2 Daniel M C mineralization rates can support ecosystem-relevant rates of denitrification. Buried horizons and 14 C dating of dissolved inorganic carbon revealed that ancient SOC mineralization was common

  15. Cruise Report Regional Monitoring Program

    E-Print Network [OSTI]

    trace elements (cadmium, chromium, copper, lead, nickel, silver, and zinc) and ancillary measurements (salinity, total suspended solids, dissolved organic carbon, chlorophyll a, ammonium, nitrate, nitrite, nutrients (ammonium, nitrate, nitrite, orthophosphate, silicate), and dissolved organic carbon. 4. Collect

  16. Carbon Smackdown: Carbon Capture

    SciTech Connect (OSTI)

    Jeffrey Long

    2010-07-12

    In this July 9, 2010 Berkeley Lab summer lecture, Lab scientists Jeff Long of the Materials Sciences and Nancy Brown of the Environmental Energy Technologies Division discuss their efforts to fight climate change by capturing carbon from the flue gas of power plants, as well as directly from the air

  17. Carbon Smackdown: Carbon Capture

    ScienceCinema (OSTI)

    Jeffrey Long

    2010-09-01

    In this July 9, 2010 Berkeley Lab summer lecture, Lab scientists Jeff Long of the Materials Sciences and Nancy Brown of the Environmental Energy Technologies Division discuss their efforts to fight climate change by capturing carbon from the flue gas of power plants, as well as directly from the air

  18. Carbon-Based Materials, High-Surface-Area Sorbents, and New Materials...

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

    technologies includes a range of carbon-based materials such as carbon nanotubes, aerogels, nanofibers (including metal-doped hybrids), as well as metal-organic frameworks,...

  19. Carbon dynamics of the Weddell Gyre, Southern Ocean

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    .058 ± 0.010 Pg C yrŔ1 derived from the inversion. However, a wintertime outgassing signal similar in size suppresses the winter outgassing signal, while its biological pump and deepwater formation act as key]) and outgassing of upwelled natural dissolved inorganic carbon (DIC) (0.4Pg C yrŔ1 ) [Mikaloff Fletcher et al

  20. Regeneration of Carbon Aerogel Exhausted in Water Purification 

    E-Print Network [OSTI]

    Tewari, Sanjay

    2012-02-14

    WORK ........................................................ 9 2.1 Carbon in Electro-chemical Applications ............................................. 9 2.2 Capacitive Deionization Technology... the process to remove a significant amount of dissolved ions from the water passing between the electrodes16. ................................................................................... 21 Figure II-2. Schematic representation of an electro...

  1. Acidizing High-Temperature Carbonate Formations Using Methanesulfonic Acid 

    E-Print Network [OSTI]

    Ortega, Alexis

    2015-03-25

    Hydrochloric acid (HCl) is the most commonly used stimulation fluid for high-temperature wells drilled in carbonate reservoirs due to its high dissolving power and low cost. However, the high corrosion rate of HCl on well tubulars could make its use...

  2. Process for coal liquefaction by separation of entrained gases from slurry exiting staged dissolvers

    DOE Patents [OSTI]

    Givens, Edwin N. (Bethlehem, PA); Ying, David H. S. (Macungie, PA)

    1983-01-01

    There is described an improved liquefaction process by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coal is slurried with a solvent, passed through a preheater and at least two dissolvers in series in the presence of hydrogen-rich gases at elevated temperatures and pressures. Solids, including mineral ash and unconverted coal macerals are separated from the condensed dissolver effluent. In accordance with the improved process, fresh hydrogen is fed to each dissolver and the entrained gas from each dissolver is separated from the slurry phase and removed from the reactor system before the condensed phase is passed to the next dissolver in the series. In accordance with another process, the feeds to the dissolvers are such that the top of each downstream dissolver is used as a gas-liquid separator.

  3. Recovery Act: Molecular Simulation of Dissolved Inorganic Carbons for Underground Brine CO2 Sequestration

    SciTech Connect (OSTI)

    Goddard, William

    2012-11-30

    To further our understanding and develop the method for measuring the DICs under geological sequestration conditions, we studied the infrared spectra of DICs under high pressure and temperature conditions. First principles simulations of DICs in brine conditions were performed using a highly optimized ReaxFF-DIC forcefield. The thermodynamics stability of each species were determined using the 2PT method, and shown to be consistent with the Reax simulations. More importantly, we have presented the IR spectra of DIC in real brine conditions as a function of temperature and pressure. At near earth conditions, we find a breaking of the O-C-O bending modes into asymmetric and symmetric modes, separated by 100cm{sup -1} at 400K and 5 GPa. These results can now be used to calibrate FTIR laser measurements.

  4. Rapid Field Measurement of Dissolved Inorganic Carbon Based on CO{sub 2}

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnical Report:Speeding access toSmall Reactor

  5. Rapid Field Measurement of Dissolved Inorganic Carbon Based on CO{sub 2}

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTech ConnectSpeedingConnect PulseSummary (Program Document)energies

  6. Interfacial Studies of Sized Carbon Fiber

    SciTech Connect (OSTI)

    Shahrul, S. N.; Hartini, M. N.; Hilmi, E. A.; Nizam, A. [Nanomaterials Program, Advance Materials Centre (AMREC), SIRIM Berhad, Lot 34, Jalan Hi-Tech Park, 09000, Kulim, Kedah (Malaysia)

    2010-03-11

    This study was performed to investigate the influence of sizing treatment on carbon fiber in respect of interfacial adhesion in composite materials, Epolam registered 2025. Fortafil unsized carbon fiber was used to performed the experiment. The fiber was commercially surface treated and it was a polyacrylonitrile based carbon fiber with 3000 filament per strand. Epicure registered 3370 was used as basic sizing chemical and dissolved in two types of solvent, ethanol and acetone for the comparison purpose. The single pull out test has been used to determine the influence of sizing on carbon fiber. The morphology of carbon fiber was observed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). The apparent interfacial strength IFSS values determined by pull out test for the Epicure registered 3370/ethanol sized carbon fiber pointed to a good interfacial behaviour compared to the Epicure registered 3370/acetone sized carbon fiber. The Epicure registered 3370/ethanol sizing agent was found to be effective in promoting adhesion because of the chemical reactions between the sizing and Epolam registered 2025 during the curing process. From this work, it showed that sized carbon fiber using Epicure registered 3370 with addition of ethanol give higher mechanical properties of carbon fiber in terms of shear strength and also provided a good adhesion between fiber and matrix compared to the sizing chemical that contain acetone as a solvent.

  7. Bankruptcy, guns or campaigns : explaining armed organizations' post-war trajectories

    E-Print Network [OSTI]

    Daly, Sarah Zukerman

    2011-01-01

    This project seeks to explain what happens to armed organizations after they sign peace accords. Why do they dissolve, return to war, or form non-violent socio-political entities (political parties or civic associations)? ...

  8. The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean 

    E-Print Network [OSTI]

    Smyth, Alison Michelle

    2014-07-31

    Despite the known reactivity of ozone (O_(3)) in water and ozone’s environmental importance in the atmosphere, there are relatively few studies published examining the chemistry of O_(3) in seawater. This study focused on ...

  9. Influence of bacterial uptake on deep-ocean dissolved organic Jrgen Bendtsen and Claus Lundsgaard

    E-Print Network [OSTI]

    loop in the aphotic zone based on new measurements of deep ocean bacterial metabolism. These together ocean circulation, we show that the observed gradient of DOC in the deep North Atlantic can be explained by the temperature dependence of bacterial metabolic activity in conjunction with the formation of deep-water at high

  10. A Spatial Deconvolution of Molecular Signals in Oceanic Dissolved Organic Matter

    E-Print Network [OSTI]

    Meador, Travis B

    2008-01-01

    subtropical North Pacific Ocean. Limnol. Oceanogr. 47: 1595-the subtropical North Pacific Ocean. Nature 388: Karl, D. ,central equatorial Pacific Ocean, 1992: Daily and finescale

  11. Interannual variability of primary production and dissolved organic nitrogen storage in the North Pacific Subtropical Gyre

    E-Print Network [OSTI]

    Fabrizio, Mary C.

    production, and mesoscale variability in vertical velocity was identified as a major contributing factor

  12. OPTICAL CHARACTERISTICS OF DISSOLVED ORGANIC MATTER DURING A BLOOM ON THE WEST FLORIDA SHELF.

    E-Print Network [OSTI]

    Gilbes, Fernando

    to equivalents of quinine sulfate and expressed in parts per billion (ppb). The total fluorescence was determined

  13. Sources and Fate of Chromophoric Dissolved Organic Matter in the Arctic Ocean and Surrounding Watersheds 

    E-Print Network [OSTI]

    Walker, Sally Annette

    2012-10-19

    of the Canadian Archipelago, 17 % of the DOM pool is of terrestrial origin, even though waters are diluted with sea ice melt, suggesting the likelihood of a subsurface plume of tDOM entrained within river runoff from Arctic Rivers. In the interior Arctic...

  14. Tracing global biogeochemical cycles and meridional overturning circulation using chromophoric dissolved organic matter

    E-Print Network [OSTI]

    Siegel, David A.

    of the ocean, ultraviolet light penetration, and photochemical reactions that influence the cycling) within the top kilometer of the Pacific and Indian Oceans. However, a much weaker correspondence is found encompass all three ocean basins transecting the subtropics where satelliteretrieved surface ocean CDOM

  15. Colored dissolved organic matter dynamics across the shelf-basin interface in the western Arctic Ocean

    E-Print Network [OSTI]

    Guo, Laodong

    Ocean Ce´line Gue´guen,1,2 Laodong Guo,1,3 Michiyo Yamamoto-Kawai,1,4 and Noriyuki Tanaka1,5 Received 14 Ocean were examined by three-dimensional excitation/emission matrix (3-D EEM) spectroscopy. CDOM and Beaufort Sea transects. Penetration of the high CDOM signal, formed on the shelves, into the Canada Basin

  16. Dissolved Organic Matter Cycling on the Louisiana Shelf: Implications for the Formation of Hypoxia 

    E-Print Network [OSTI]

    Shen, Li

    2012-02-14

    .44 ?1.01 2.40 ?1.64 Fluorescence 0.52 ?0.51 0.25 ?0.14 0.26 ?0.14 0.19 ?0.20 0.10 ?0.02 0.22 ?0.18 TSM (mg/L) 18.05 ?11.75 7.27 ?3.33 9.72 ?6.82 6.25 ?4.08 1.54 ?0.94 2.67 ?2.23 TDN (?M) ND ND ND 12.11 ?3.08 10....10 ?2.03 15.30 ?3.26 DOC (?M) 103.98 ?31.73 58.04 ?15.42 95.88 ?13.41 105.32 ?40.79 103.21 ?34.80 119.30 ?48.49 DON (?M) ND ND ND 7.44 ?3.40 7.42 ?2.28 8.11 ?3.51 DFAA (nM) 381.9 261.6 280.5 328.2 249.7 257.5 Table 2...

  17. A spatial deconvolution of molecular signals in oceanic dissolved organic matter

    E-Print Network [OSTI]

    Meador, Travis Blake

    2008-01-01

    subtropical North Pacific Ocean. Limnol. Oceanogr. 47: 1595-the subtropical North Pacific Ocean. Nature 388: Karl, D. ,in the subtropical North Pacific Ocean. Nature 388: Karl, D;

  18. Inorganic Carbon Isotopes and Chemical Characterization of Watershed Drainages, Barrow, Alaska, 2013

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Throckmorton, Heather M.; Heikoop, Jeffrey H.; Newman, Brent D.; Wilson, Cathy J.

    Arctic soils contain a large pool of terrestrial C and are of interest due to their potential for releasing significant carbon dioxide (CO2) and methane (CH4) to the atmosphere. Due to substantial landscape heterogeneity, predicting ecosystem-scale CH4 and CO2 production is challenging. This study assessed dissolved inorganic carbon (DIC = Sigma (total) dissolved CO2) and CH4 in watershed drainages in Barrow, Alaska as critical convergent zones of regional geochemistry, substrates, and nutrients. In July and September of 2013, surface waters and saturated subsurface pore waters were collected from 17 drainages. Based on simultaneous DIC and CH4 cycling, we synthesized isotopic and geochemical methods to develop a subsurface CH4 and DIC balance by estimating mechanisms of CH4 and DIC production and transport pathways and oxidation of subsurface CH4. We observed a shift from acetoclastic (July) towards hydrogenotropic (September) methanogenesis at sites located towards the end of major freshwater drainages, adjacent to salty estuarine waters, suggesting an interesting landscape-scale effect on CH4 production mechanism. The majority of subsurface CH4 was transported upward by plant-mediated transport and ebullition, predominantly bypassing the potential for CH4 oxidation. Thus, surprisingly CH4 oxidation only consumed approximately 2.51 +/- 0.82% (July) and 0.79 +/- 0.79% (September) of CH4 produced at the frost table, contributing to less than 0.1% of DIC production. DIC was primarily produced from respiration, with iron and organic matter serving as likely e- acceptors. This work highlights the importance of spatial and temporal variability of CH4 production at the watershed scale, and suggests broad scale investigations are required to build better regional or pan-Arctic representations of CH4 and CO2 production.

  19. Inorganic Carbon Isotopes and Chemical Characterization of Watershed Drainages, Barrow, Alaska, 2013

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Heikoop, Jeffrey H.; Throckmorton, Heather M.; Wilson, Cathy J.; Newman, Brent D.

    2015-09-25

    Arctic soils contain a large pool of terrestrial C and are of interest due to their potential for releasing significant carbon dioxide (CO2) and methane (CH4) to the atmosphere. Due to substantial landscape heterogeneity, predicting ecosystem-scale CH4 and CO2 production is challenging. This study assessed dissolved inorganic carbon (DIC = Sigma (total) dissolved CO2) and CH4 in watershed drainages in Barrow, Alaska as critical convergent zones of regional geochemistry, substrates, and nutrients. In July and September of 2013, surface waters and saturated subsurface pore waters were collected from 17 drainages. Based on simultaneous DIC and CH4 cycling, we synthesized isotopic and geochemical methods to develop a subsurface CH4 and DIC balance by estimating mechanisms of CH4 and DIC production and transport pathways and oxidation of subsurface CH4. We observed a shift from acetoclastic (July) towards hydrogenotropic (September) methanogenesis at sites located towards the end of major freshwater drainages, adjacent to salty estuarine waters, suggesting an interesting landscape-scale effect on CH4 production mechanism. The majority of subsurface CH4 was transported upward by plant-mediated transport and ebullition, predominantly bypassing the potential for CH4 oxidation. Thus, surprisingly CH4 oxidation only consumed approximately 2.51 +/- 0.82% (July) and 0.79 +/- 0.79% (September) of CH4 produced at the frost table, contributing to less than 0.1% of DIC production. DIC was primarily produced from respiration, with iron and organic matter serving as likely e- acceptors. This work highlights the importance of spatial and temporal variability of CH4 production at the watershed scale, and suggests broad scale investigations are required to build better regional or pan-Arctic representations of CH4 and CO2 production.

  20. Carbon stored in human settlements: the conterminous United States

    E-Print Network [OSTI]

    Brown, Daniel G.

    value for mitigation of carbon dioxide emissions, the organic carbon storage in human settlements has release of carbon dioxide and 76% of wood used for industrial purposes. By 2050 the proportion, and 5% to buildings. To offset rising urban emissions of carbon, regional and national governments

  1. Carbon K-edge Spectra of Carbonate Minerals

    SciTech Connect (OSTI)

    Brandes, J.; Wirick, S; Jacobsen, C

    2010-01-01

    Carbon K-edge X-ray spectroscopy has been applied to the study of a wide range of organic samples, from polymers and coals to interstellar dust particles. Identification of carbonaceous materials within these samples is accomplished by the pattern of resonances in the 280-320 eV energy region. Carbonate minerals are often encountered in the study of natural samples, and have been identified by a distinctive resonance at 290.3 eV. Here C K-edge and Ca L-edge spectra from a range of carbonate minerals are presented. Although all carbonates exhibit a sharp 290 eV resonance, both the precise position of this resonance and the positions of other resonances vary among minerals. The relative strengths of the different carbonate resonances also vary with crystal orientation to the linearly polarized X-ray beam. Intriguingly, several carbonate minerals also exhibit a strong 288.6 eV resonance, consistent with the position of a carbonyl resonance rather than carbonate. Calcite and aragonite, although indistinguishable spectrally at the C K-edge, exhibited significantly different spectra at the Ca L-edge. The distinctive spectral fingerprints of carbonates provide an identification tool, allowing for the examination of such processes as carbon sequestration in minerals, Mn substitution in marine calcium carbonates (dolomitization) and serpentinization of basalts.

  2. The radiation chemistry of CCD-PEG, a solvent-extraction process for Cs and Sr from dissolved nuclear fuel

    SciTech Connect (OSTI)

    Mincher, B.J.; Herbst, R.S.; Tillotson, R.D.; Mezyk, S.P.

    2008-07-01

    Cobalt dicarbollide and polyethylene glycol in phenyl-trifluoromethyl sulfone (HCCD/PEG in FS- 13) is currently under consideration for use in the process-scale selective extraction of fission- product cesium and strontium from dissolved nuclear fuel. This solvent will be exposed to high radiation doses during use and has not been adequately investigated for radiation stability. Here, HCCD/PEG was y-irradiated to various absorbed doses, to a maximum of 432 kGy, using {sup 60}Co. Irradiations were performed for the neat organic phase and also for the organic phase in contact with 1 M-nitric acid mixed by air sparging. Post-irradiation solvent-extraction measurements showed that Cs distribution ratios were unaffected; however, Sr extraction efficiency decreased with absorbed dose under both conditions and was greater when in contact with the aqueous phase. Stripping performance was not affected. A mechanism, initiated by direct radiolysis of the sulfone diluent, is proposed. (authors)

  3. Integrated Experimental and Modeling Studies of Mineral Carbonation as a Mechanism for Permanent Carbon Sequestration in Mafic/Ultramafic Rocks

    SciTech Connect (OSTI)

    Wang, Zhengrong; Qiu, Lin; Zhang, Shuang; Bolton, Edward; Bercovici, David; Ague, Jay; Karato, Shun-Ichiro; Oristaglio, Michael; Zhu, Wen-Iu; Lisabeth, Harry; Johnson, Kevin

    2014-09-30

    A program of laboratory experiments, modeling and fieldwork was carried out at Yale University, University of Maryland, and University of Hawai‘i, under a DOE Award (DE-FE0004375) to study mineral carbonation as a practical method of geologic carbon sequestration. Mineral carbonation, also called carbon mineralization, is the conversion of (fluid) carbon dioxide into (solid) carbonate minerals in rocks, by way of naturally occurring chemical reactions. Mafic and ultramafic rocks, such as volcanic basalt, are natural candidates for carbonation, because the magnesium and iron silicate minerals in these rocks react with brines of dissolved carbon dioxide to form carbonate minerals. By trapping carbon dioxide (CO2) underground as a constituent of solid rock, carbonation of natural basalt formations would be a secure method of sequestering CO2 captured at power plants in efforts to mitigate climate change. Geochemical laboratory experiments at Yale, carried out in a batch reactor at 200°C and 150 bar (15 MPa), studied carbonation of the olivine mineral forsterite (Mg2SiO4) reacting with CO2 brines in the form of sodium bicarbonate (NaHCO3) solutions. The main carbonation product in these reactions is the carbonate mineral magnesite (MgCO3). A series of 32 runs varied the reaction time, the reactive surface area of olivine grains and powders, the concentration of the reacting fluid, and the starting ratio of fluid to olivine mass. These experiments were the first to study the rate of olivine carbonation under passive conditions approaching equilibrium. The results show that, in a simple batch reaction, olivine carbonation is fastest during the first 24 hours and then slows significantly and even reverses. A natural measure of the extent of carbonation is a quantity called the carbonation fraction, which compares the amount of carbon removed from solution, during a run, to the maximum amount that could have been removed if the olivine initially present had fully dissolved and the cations released had subsequently precipitated in carbonate minerals. The carbonation fractions observed in batch experiments with olivine grains and powders varied significantly, from less than 0.01 (1%) to more than 0.5 (50%). Over time, the carbonation fractions reached an upper limit after about 24 to 72 hours of reaction, then stayed constant or decreased. The peak Final Scientific/Technical Report DE-FE0004275 | Mineral Carbonation | 4 coincided with the appearance of secondary magnesium-bearing silicate minerals, whose formation competes for magnesium ions in solution and can even promote conditions that dissolve magnesite. The highest carbonation fractions resulted from experiments with low ratios of concentrated solution to olivine, during which amorphous silica spheres or meshes formed, instead of secondary silicate minerals. The highest carbonation fractions appear to result from competing effects. Precipitation of silica layers on olivine reduces the reactive surface area and, thus, the rate of olivine dissolution (which ultimately limits the carbonation rate), but these same silica layers can also inhibit the formation of secondary silicate minerals that consume magnesite formed in earlier stages of carbonation. Simulation of these experiments with simple geochemical models using the software program EQ3/6 reproduces the general trends observed—especially the results for the carbonation fraction in short-run experiments. Although further experimentation and better models are needed, this study nevertheless provides a framework for understanding the optimal conditions for sequestering carbon dioxide by reacting CO2-bearing fluids with rocks containing olivine minerals. A series of experiments at the Rock Physics Laboratory at the University of Maryland studied the carbonation process during deformation of thermally cracked olivine-rich rock samples (dunit

  4. Low density microcellular carbon foams and method of preparation

    DOE Patents [OSTI]

    Arnold, C. Jr.; Aubert, J.H.; Clough, R.L.; Rand, P.B.; Sylwester, A.P.

    1988-06-20

    A low density, open-celled microcellular carbon foam is disclosed which is prepared by dissolving a carbonizable polymer or copolymer in a solvent, pouring the solution into a mold, cooling the solution, removing the solvent, and then carbonizing the polymer or copolymer in a high temperature oven to produce the foam. If desired, an additive can be introduced in order to produce a doped carbon foam, and the foams can be made isotropic by selection of a suitable solvent. The low density, microcellular foams produced by this process are particularly useful in the fabrication of inertial confinement fusion targets, but can also be used as catalysts, absorbents, and electrodes.

  5. Low density microcellular carbon foams and method of preparation

    DOE Patents [OSTI]

    Arnold, Jr., Charles (Albuquerque, NM); Aubert, James H. (Albuquerque, NM); Clough, Roger L. (Albuquerque, NM); Rand, Peter B. (Albuquerque, NM); Sylwester, Alan P. (Albuquerque, NM)

    1989-01-01

    A low density, open-celled microcellular carbon foam is disclosed which is prepared by dissolving a carbonizable polymer or copolymer in a solvent, pouring the solution into a mold, cooling the solution, removing the solvent, and then carbonizing the polymer or copolymer in a high temperature oven to produce the foam. If desired, an additive can be introduced in order to produce a doped carbon foam, and the foams can be made isotropic by selection of a suitable solvent. The low density, microcellular foams produced by this process are particularly useful in the fabrication of inertial confinement fusion targets, but can also be used as catalysts, absorbents, and electrodes.

  6. Curriculum Vitae TODD Z. OSBORNE, PH.D.

    E-Print Network [OSTI]

    Liao, James C.

    and macro- nutrients, organic matter dynamics, carbon sequestration, plant ecology, and ecosystem and macro-nutrients, organic matter dynamics, carbon sequestration, plant ecology, and ecosystem restoration of Florida, Gainesville, FL 32611 (May 2000) Fine particulate and dissolved organic carbon dynamics

  7. Carbon Based Nano-Materials Research, Development and Applications in Optoelectronics

    E-Print Network [OSTI]

    Wang, Feihu

    2012-01-01

    Ultrasmooth Graphene Nanoribbon Semiconductors. Sciencepristine graphene is not a semiconductor with a finite bandgraphene, carbon nanotubes, and organic semiconductors. The

  8. The temporal dynamics of terrestrial organic matter transfer to the oceans : initial assessment and application

    E-Print Network [OSTI]

    Drenzek, Nicholas J

    2007-01-01

    This thesis employs compound-specific stable carbon and radiocarbon isotopic analysis of organic biomarkers to (a) resolve petrogenic from pre-aged vascular plant organic carbon (OC) in continental margin sediments, (b) ...

  9. Intermediate Temperature Carbon - Carbon Composite Structures. CRADA Final Report

    SciTech Connect (OSTI)

    Lara-Curzio, Edgar [ORNL

    2007-06-01

    The objective of this Cooperative Research and Development Agreement (CRADA) between UT-Battelle, LLC (the "Contractor") and Synterials, Inc. (the "Participant") was to demonstrate promising processing methods, which can lead to producing Carbon-Carbon Composites (CCC), with tensile and interlaminar properties comparable to those of organic matrix composites and environmental stability at 1200 F for long periods of time. The participant synthesized carbon-carbon composites with two different fiber coatings and three different matrices. Both parties evaluated the tensile and interlaminar properties of these materials and characterized the microstructure of the matrices and interfaces. It was found that fiber coatings of carbon and boron carbide provided the best environmental protection and resulted in composites with high tensile strength.

  10. Training Graduate and Undergraduate Students in Simulation and Risk Assessment for Carbon Sequestration

    SciTech Connect (OSTI)

    McCray, John

    2013-09-30

    Capturing carbon dioxide (CO2) and injecting it into deep underground formations for storage (carbon capture and underground storage, or CCUS) is one way of reducing anthropogenic CO2 emissions. Gas or aqueous-phase leakage may occur due to transport via faults and fractures, through faulty well bores, or through leaky confining materials. Contaminants of concern include aqueous salts and dissolved solids, gaseous or aqueous-phase organic contaminants, and acidic gas or aqueous-phase fluids that can liberate metals from aquifer minerals. Understanding the mechanisms and parameters that can contribute to leakage of the CO2 and the ultimate impact on shallow water aquifers that overlie injection formations is an important step in evaluating the efficacy and risks associated with long-term CO2 storage. Three students were supported on the grant Training Graduate and Undergraduate Students in Simulation and Risk Assessment for Carbon Sequestration. These three students each examined a different aspect of simulation and risk assessment related to carbon dioxide sequestration and the potential impacts of CO2 leakage. Two performed numerical simulation studies, one to assess leakage rates as a function of fault and deep reservoir parameters and one to develop a method for quantitative risk assessment in the event of a CO2 leak and subsequent changes in groundwater chemistry. A third student performed an experimental evaluation of the potential for metal release from sandstone aquifers under simulated leakage conditions. This study has resulted in two student first-authored published papers {Siirila, 2012 #560}{Kirsch, 2014 #770} and one currently in preparation {Menke, In prep. #809}.

  11. Recovery of organic acids

    DOE Patents [OSTI]

    Verser, Dan W. (Golden, CO); Eggeman, Timothy J. (Lakewood, CO)

    2009-10-13

    A method is disclosed for the recovery of an organic acid from a dilute salt solution in which the cation of the salt forms an insoluble carbonate salt. A tertiary amine and CO.sub.2 are introduced to the solution to form the insoluble carbonate salt and a complex between the acid and an amine. A water immiscible solvent, such as an alcohol, is added to extract the acid/amine complex from the dilute salt solution to a reaction phase. The reaction phase is continuously dried and a product between the acid and the solvent, such as an ester, is formed.

  12. Recovery of organic acids

    DOE Patents [OSTI]

    Verser, Dan W. (Menlo Park, CA); Eggeman, Timothy J. (Lakewood, CO)

    2011-11-01

    A method is disclosed for the recovery of an organic acid from a dilute salt solution in which the cation of the salt forms an insoluble carbonate salt. A tertiary amine and CO.sub.2 are introduced to the solution to form the insoluble carbonate salt and a complex between the acid and an amine. A water immiscible solvent, such as an alcohol, is added to extract the acid/amine complex from the dilute salt solution to a reaction phase. The reaction phase is continuously dried and a product between the acid and the solvent, such as an ester, is formed.

  13. NOTES ON THE DISSOLVED CONTENT OF WATER IN ITS EFFECT UPON FISHES

    E-Print Network [OSTI]

    .. NOTES ON THE DISSOLVED CONTENT OF WATER IN ITS EFFECT UPON FISHES· JJ. By M. C. Marsh United at Washington. U. S. A.· September 22 to 26. 1908 #12;CONTENTS. Page. Natural impurities in water u n u _ _ u gas content- u u u u u 898 Dissolved air content of water from a driven weILuuu u______________ 898

  14. The potential source of dissolved aluminum from resuspended sediments to the North Atlantic deep water

    SciTech Connect (OSTI)

    Moran, S.B.; Moore, R.M. (Dalhousie Univ., Halifax, Nova Scotia (Canada))

    1991-10-01

    Laboratory and field studies were conducted to investigate the significance of resuspended sediments as a source of dissolved Al to the deep northwest Atlantic. Sediment resuspension experiments demonstrate the effect on dissolved Al concentration (initially 11 nM) of adding natural suspended sediments (ca. 0.1-10 mg/L) to seawater. The concentration of dissolved Al increased by the resuspension of sediments; for example, addition of 0.15 mg/L sediments caused dissolved Al to increase by 10 nM. Distributions of dissolved and leachable particulate Al off the tail of the Grand Banks, near the high-energy western boundary current, show elevated levels in the near-bottom waters. The authors suggest that resuspended sediments associated with nepheloid layers along the western boundary of the North Atlantic are a source of dissolved Al. Strong western boundary currents provide the energy to resuspend and maintain intense nepheloid layers of sediments. Continued resuspension and deposition of sediments within the nepheloid layer promotes the release of Al from sediments to the overlying water. The Al-rich terrigenous sediments that predominate along the deep boundary of the Denmark Strait, Labrador Sea, Newfoundland and off Nova Scotia constitute a potentially significant source of dissolved Al. Release of Al from resuspended sediments associated with nepheloid layers at a more northern location (e.g., Denmark Strait) may contribute to the near-linear increase in dissolved Al with depth observed in the deep northwest Atlantic.

  15. Preferential Solvent Partitioning within Asphaltenic Aggregates Dissolved in Binary Solvent Mixtures

    E-Print Network [OSTI]

    Kilpatrick, Peter K.

    Preferential Solvent Partitioning within Asphaltenic Aggregates Dissolved in Binary Solvent on asphaltenes from Hondo crude oil dissolved in binary solvent mixtures of toluene with n-heptane, decalin, or 1 data, and subsequent calculations of minimum error were performed to ascertain the entrained solvent

  16. Metal partitioning between colloidal and dissolved phases and its relation with

    E-Print Network [OSTI]

    Guo, Laodong

    Metal partitioning between colloidal and dissolved phases and its relation with bioavailability December 2001 Abstract Kinetics and the extent of metal partitioning between colloidal and dissolved phases and coagulation of metals associated with colloids were examined to determine their effects on the bioavailability

  17. Storage and turnover of organic matter in soil

    E-Print Network [OSTI]

    Torn, M.S.

    2009-01-01

    of organic carbon from peat soils. Nature 412 , 785. Fried,Plant Litter. Standard Soil Methods for Long-Term Ecological2007). Role of proteins in soil carbon and nitrogen storage:

  18. Source(s) and cycling of the nonhydrolyzable organic fraction of oceanic particles

    E-Print Network [OSTI]

    Hwang, J; Druffel, ERM; Eglinton, TI; Repeta, DJ

    2006-01-01

    J.A. , Hedges, J.I. , 2001a. Demineralization of marine andthan these values. By demineralization, the organic carbon

  19. Process automation using combinations of process and machine control technologies with application to a continuous dissolver

    SciTech Connect (OSTI)

    Spencer, B.B.: Yarbro, O.O.

    1991-01-01

    Operation of a continuous rotary dissolver, designed to leach uranium-plutonium fuel from chopped sections of reactor fuel cladding using nitric acid, has been automated. The dissolver is a partly continuous, partly batch process that interfaces at both ends with batchwise processes, thereby requiring synchronization of certain operations. Liquid acid is fed and flows through the dissolver continuously, whereas chopped fuel elements are fed to the dissolver in small batches and move through the compartments of the dissolver stagewise. Sequential logic (or machine control) techniques are used to control discrete activities such as the sequencing of isolation valves. Feedback control is used to control acid flowrates and temperatures. Expert systems technology is used for on-line material balances and diagnostics of process operation. 1 ref., 3 figs.

  20. Indonesia-Strengthening Planning Capacity for Low Carbon Growth...

    Open Energy Info (EERE)

    in Developing Asia Jump to: navigation, search Name Indonesia-Strengthening Planning Capacity for Low Carbon Growth in Developing Asia AgencyCompany Organization Asian...

  1. Philippines-Strengthening Planning Capacity for Low Carbon Growth...

    Open Energy Info (EERE)

    in Developing Asia Jump to: navigation, search Name Philippines-Strengthening Planning Capacity for Low Carbon Growth in Developing Asia AgencyCompany Organization Asian...

  2. Vietnam-Strengthening Planning Capacity for Low Carbon Growth...

    Open Energy Info (EERE)

    Growth in Developing Asia Jump to: navigation, search Name Vietnam-Strengthening Planning Capacity for Low Carbon Growth in Developing Asia AgencyCompany Organization Asian...

  3. Strengthening Planning Capacity for Low Carbon Growth in Developing...

    Open Energy Info (EERE)

    Asia - Thailand Jump to: navigation, search Name Thailand-Strengthening Planning Capacity for Low Carbon Growth in Developing Asia AgencyCompany Organization Asian...

  4. Preliminary Study on Sustainable Low-Carbon Development Towards...

    Open Energy Info (EERE)

    Vietnam Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Preliminary Study on Sustainable Low-Carbon Development Towards 2030 in Vietnam AgencyCompany Organization:...

  5. Sorbents and Carbon-Based Materials for Hydrogen Storage Research...

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

    for storing hydrogen in high-surface-area sorbents such as hybrid carbon nanotubes, aerogels, and nanofibers, as well as metal-organic frameworks and conducting polymers. A...

  6. Plant diversity increases soil microbial activity and soil carbon storage.

    E-Print Network [OSTI]

    2015-01-01

    B. The vertical distribution of soil organic carbon and itsA. S. & Whitmore, A. P. Soil organic matter turnover isorganic matter in a cultivated soil. Org. Geochem. 33, 357–

  7. Carbon Allocation in Underground Storage Organs

    E-Print Network [OSTI]

    , oil, Solanum tuberosum, Beta vulgaris, Cyperus esculentus, Pastinaca sativa, GMO, transcription factor

  8. Source Term Modeling for Evaluating the Potential Impacts to Groundwater of Fluids Escaping from a Depleted Oil Reservoir Used for Carbon Sequestration

    SciTech Connect (OSTI)

    Cantrell, Kirk J.; Brown, Christopher F.

    2014-06-13

    In recent years depleted oil reservoirs have received special interest as carbon storage reservoirs because of their potential to offset costs through collaboration with enhanced oil recovery projects. Modeling is currently being conducted to evaluate potential risks to groundwater associated with leakage of fluids from depleted oil reservoirs used for storage of CO2. Modeling results reported here focused on understanding how toxic organic compounds found in oil will distribute between the various phases within a storage reservoir after introduction of CO2, understanding the migration potential of these compounds, and assessing potential groundwater impacts should leakage occur. Two model scenarios were conducted to evaluate how organic components in oil will distribute among the phases of interest (oil, CO2, and brine). The first case consisted of 50 wt.% oil and 50 wt.% water; the second case was 90 wt.% CO2 and 10 wt.% oil. Several key organic compounds were selected for special attention in this study based upon their occurrence in oil at significant concentrations, relative toxicity, or because they can serve as surrogate compounds for other more highly toxic compounds for which required input data are not available. The organic contaminants of interest (COI) selected for this study were benzene, toluene, naphthalene, phenanthrene, and anthracene. Partitioning of organic compounds between crude oil and supercritical CO2 was modeled using the Peng-Robinson equation of state over temperature and pressure conditions that represent the entire subsurface system (from those relevant to deep geologic carbon storage environments to near surface conditions). Results indicate that for a typical set of oil reservoir conditions (75°C, and 21,520 kPa) negligible amounts of the COI dissolve into the aqueous phase. When CO2 is introduced into the reservoir such that the final composition of the reservoir is 90 wt.% CO2 and 10 wt.% oil, a significant fraction of the oil dissolves into the vapor phase. As the vapor phase moves up through the stratigraphic column, pressures and temperatures decrease, resulting in significant condensation of oil components. The heaviest organic components condense early in this process (at higher pressures and temperatures), while the lighter components tend to remain in the vapor phase until much lower pressures and temperatures are reached. Based on the model assumptions, the final concentrations of COI to reach an aquifer at 1,520 kPa and 25°C were quite significant for benzene and toluene, whereas the concentrations of polynuclear aromatic hydrocarbons that reach the aquifer were very small. This work demonstrates a methodology that can provide COI source term concentrations in CO2 leaking from a reservoir and entering an overlying aquifer for use in risk assessments.

  9. Regulatory approaches for addressing dissolved oxygen concerns at hydropower facilities

    SciTech Connect (OSTI)

    Peterson, Mark J.; Cada, Glenn F.; Sale, Michael J.; Eddlemon, Gerald K.

    2003-03-01

    Low dissolved oxygen (DO) concentrations are a common water quality problem downstream of hydropower facilities. At some facilities, structural improvements (e.g. installation of weir dams or aerating turbines) or operational changes (e.g., spilling water over the dam) can be made to improve DO levels. In other cases, structural and operational approaches are too costly for the project to implement or are likely to be of limited effectiveness. Despite improvements in overall water quality below dams in recent years, many hydropower projects are unable to meet state water quality standards for DO. Regulatory agencies in the U.S. are considering or implementing dramatic changes in their approach to protecting the quality of the Nation’s waters. New policies and initiatives have emphasized flexibility, increased collaboration and shared responsibility among all parties, and market-based, economic incentives. The use of new regulatory approaches may now be a viable option for addressing the DO problem at some hydropower facilities. This report summarizes some of the regulatory-related options available to hydropower projects, including negotiation of site-specific water quality criteria, use of biological monitoring, watershed-based strategies for the management of water quality, and watershed-based trading. Key decision points center on the health of the local biological communities and whether there are contributing impacts (i.e., other sources of low DO effluents) in the watershed. If the biological communities downstream of the hydropower project are healthy, negotiation for site-specific water quality standards or biocriteria (discharge performance criteria based on characteristics of the aquatic biota) might be pursued. If there are other effluent dischargers in the watershed that contribute to low DO problems, watershed-scale strategies and effluent trading may be effective. This report examines the value of regulatory approaches by reviewing their use in other

  10. Carbon Fiber

    SciTech Connect (OSTI)

    McGetrick, Lee

    2014-04-17

    Lee McGetrick leads ORNL's effort to produce light, durable carbon fiber at lower cost -- a key to improvements in manufacturing that will produce more fuel-efficient vehicles and other advances.

  11. Carbon Fiber

    ScienceCinema (OSTI)

    McGetrick, Lee

    2014-07-23

    Lee McGetrick leads ORNL's effort to produce light, durable carbon fiber at lower cost -- a key to improvements in manufacturing that will produce more fuel-efficient vehicles and other advances.

  12. Carbon Sequestration

    SciTech Connect (OSTI)

    2013-05-06

    Carbon Sequestration- the process of capturing the CO2 released by the burning of fossil fuels and storing it deep withing the Earth, trapped by a non-porous layer of rock.

  13. Impervious Areas: Examining the Undermining Effects on Surface Water Quality 

    E-Print Network [OSTI]

    Young, De'Etra Jenra

    2012-02-14

    lot study. Results indicated that day since last rain event had the most significant effect on surface water quality. Furthermore, concrete produced higher dissolved organic carbon (DOC), dissolved organic nitrogen (DON), potassium and calcium...

  14. 13 FEBRUARY 2009 VOL 323 SCIENCE www.sciencemag.org888 PERSPECTIVES

    E-Print Network [OSTI]

    Zaanen, Jan

    and physical habitat of the lake, thus changing nutrient and contaminant cycling. Dissolved organic carbon can processes (13). Widespread regional changes in dissolved organic car- bon concentrations in inland waters

  15. Submarine venting of liquid carbon dioxide on a Mariana Arc volcano

    E-Print Network [OSTI]

    Chadwick, Bill

    Submarine venting of liquid carbon dioxide on a Mariana Arc volcano John Lupton NOAA/Pacific Marine, Washington 98115-6349, USA Cornel de Ronde Institute of Geological and Nuclear Sciences, 30 Gracefield Road, California, 92065, USA [1] Although CO2 is generally the most abundant dissolved gas found in submarine

  16. Distal transport of dissolved hydrothermal iron in the deep South Pacific Ocean

    E-Print Network [OSTI]

    Fitzsimmons, Jessica N.

    Until recently, hydrothermal vents were not considered to be an important source to the marine dissolved Fe (dFe) inventory because hydrothermal Fe was believed to precipitate quantitatively near the vent site. Based on ...

  17. Global assessment of ocean carbon export by combining satellite observations

    E-Print Network [OSTI]

    Siegel, David A.

    Global assessment of ocean carbon export by combining satellite observations and food-web models D Studies, University of Tasmania, Hobart, Tasmania, Australia Abstract The export of organic carbon from cycle. Here we introduce a mechanistic assessment of the global ocean carbon export using satellite

  18. Carbon dynamics of terrestrial ecosystems on the Tibetan Plateau

    E-Print Network [OSTI]

    Xiao, Jingfeng

    RESEARCH PAPER Carbon dynamics of terrestrial ecosystems on the Tibetan Plateau during the 20th tundra to evergreen tropics. Its soils are dominated by permafrost and are rich in organic carbon. Its, the carbon dynamics of the Tibetan Plateau have not been well quantified under changes of climate and per

  19. Gas adsorption on metal-organic frameworks

    DOE Patents [OSTI]

    Willis, Richard R. (Cary, IL); Low, John J. (Schaumburg, IL), Faheem, Syed A. (Huntley, IL); Benin, Annabelle I. (Oak Forest, IL); Snurr, Randall Q. (Evanston, IL); Yazaydin, Ahmet Ozgur (Evanston, IL)

    2012-07-24

    The present invention involves the use of certain metal organic frameworks that have been treated with water or another metal titrant in the storage of carbon dioxide. The capacity of these frameworks is significantly increased through this treatment.

  20. Method for making carbon films

    DOE Patents [OSTI]

    Tan, Ming X. (Livermore, CA)

    1999-01-01

    A method for treating an organic polymer material, preferably a vinylidene chloride/vinyl chloride copolymer (Saran) to produce a flat sheet of carbon film material having a high surface area (.apprxeq.1000 m.sup.2 /g) suitable as an electrode material for super capacitor applications. The method comprises heating a vinylidene chloride/vinyl chloride copolymer film disposed between two spaced apart graphite or ceramic plates to a first temperature of about 160.degree. C. for about 14 hours to form a stabilized vinylidene chloride/vinyl chloride polymer film, thereafter heating the stabilized film to a second temperature of about 750.degree. C. in an inert atmosphere for about one hour to form a carbon film; and finally activating the carbon film to increase the surface area by heating the carbon film in an oxidizing atmosphere to a temperature of at least 750-850.degree. C. for between 1-6 hours.

  1. Method for making carbon films

    DOE Patents [OSTI]

    Tan, M.X.

    1999-07-29

    A method for treating an organic polymer material, preferably a vinylidene chloride/vinyl chloride copolymer (Saran) to produce a flat sheet of carbon film material having a high surface area ([approx equal]1000 m[sup 2] /g) suitable as an electrode material for super capacitor applications. The method comprises heating a vinylidene chloride/vinyl chloride copolymer film disposed between two spaced apart graphite or ceramic plates to a first temperature of about 160 C for about 14 hours to form a stabilized vinylidene chloride/vinyl chloride polymer film, thereafter heating the stabilized film to a second temperature of about 750 C in an inert atmosphere for about one hour to form a carbon film; and finally activating the carbon film to increase the surface area by heating the carbon film in an oxidizing atmosphere to a temperature of at least 750--850 C for between 1--6 hours. 2 figs.

  2. Protective effects of pulmonary epithelial lining fluid on oxidative stress and DNA single-strand breaks caused by ultrafine carbon black, ferrous sulphate and organic extract of diesel exhaust particles

    SciTech Connect (OSTI)

    Chuang, Hsiao-Chi [School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan (China) [School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan (China); Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan (China); Cheng, Yi-Ling; Lei, Yu-Chen [Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan (China)] [Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan (China); Chang, Hui-Hsien [Institute of Environmental Health, College of Public Health, National Taiwan University, Taipei, Taiwan (China)] [Institute of Environmental Health, College of Public Health, National Taiwan University, Taipei, Taiwan (China); Cheng, Tsun-Jen, E-mail: tcheng@ntu.edu.tw [Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan (China) [Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan (China); Department of Public Health, College of Public Health, National Taiwan University, Taipei, Taiwan (China)

    2013-02-01

    Pulmonary epithelial lining fluid (ELF) is the first substance to make contact with inhaled particulate matter (PM) and interacts chemically with PM components. The objective of this study was to determine the role of ELF in oxidative stress, DNA damage and the production of proinflammatory cytokines following physicochemical exposure to PM. Ultrafine carbon black (ufCB, 15 nm; a model carbonaceous core), ferrous sulphate (FeSO{sub 4}; a model transition metal) and a diesel exhaust particle (DEP) extract (a model organic compound) were used to examine the acellular oxidative potential of synthetic ELF and non-ELF systems. We compared the effects of exposure to ufCB, FeSO{sub 4} and DEP extract on human alveolar epithelial Type II (A549) cells to determine the levels of oxidative stress, DNA single-strand breaks and interleukin-8 (IL-8) production in ELF and non-ELF systems. The effects of ufCB and FeSO{sub 4} on the acellular oxidative potential, cellular oxidative stress and DNA single-strand breakage were mitigated significantly by the addition of ELF, whereas there was no decrease following treatment with the DEP extract. There was no significant effect on IL-8 production following exposure to samples that were suspended in ELF/non-ELF systems. The results of the present study indicate that ELF plays an important role in the initial defence against PM in the pulmonary environment. Experimental components, such as ufCB and FeSO{sub 4}, induced the production of oxidative stress and led to DNA single-strand breaks, which were moderately prevented by the addition of ELF. These findings suggest that ELF plays a protective role against PM-driven oxidative stress and DNA damage. -- Highlights: ? To determine the role of ELF in ROS, DNA damage and IL-8 after exposure to PM. ? ufCB, FeSO{sub 4} and DEP extract were used to examine the protective effects of ELF. ? PM-driven oxidative stress and DNA single-strand breakage were mitigated by ELF. ? The findings suggest that ELF has a protective role against PM. ? The synthetic ELF system could reduce the use of animals in PM-driven ROS testing.

  3. Method of stripping metals from organic solvents

    DOE Patents [OSTI]

    Todd, Terry A. (Aberdeen, ID); Law, Jack D. (Pocatello, ID); Herbst, R. Scott (Idaho Falls, ID); Romanovskiy, Valeriy N. (St. Petersburg, RU); Smirnov, Igor V. (St.-Petersburg, RU); Babain, Vasily A. (St-Petersburg, RU); Esimantovski, Vyatcheslav M. (St-Petersburg, RU)

    2009-02-24

    A new method to strip metals from organic solvents in a manner that allows for the recycle of the stripping agent. The method utilizes carbonate solutions of organic amines with complexants, in low concentrations, to strip metals from organic solvents. The method allows for the distillation and reuse of organic amines. The concentrated metal/complexant fraction from distillation is more amenable to immobilization than solutions resulting from current practice.

  4. Removal of boron, fluoride and nitrate by electrodialysis in the presence of organic matter 

    E-Print Network [OSTI]

    Banasiak, Laura J.; Schäfer, Andrea

    2009-01-01

    H and the degree of demineralization. Dissolved organic matter (humic acid, tannic acid and alginic acid) resulted in enhanced removal of boron and F? as a result of the binding of F? within the organic matter structure and complexation of boric acid (B(OH)3...

  5. DISCOLORATION OF THE WETTED SURFACE IN THE 6.1D DISSOLVER

    SciTech Connect (OSTI)

    Rudisill, T.; Mickalonis, J.; Crapse, K.

    2013-12-18

    During a camera inspection of a failed coil in the 6.1D dissolver, an orange discoloration was observed on a portion of the dissolver wall and coils. At the request of H-Canyon Engineering, the inspection video of the dissolver was reviewed by SRNL to assess if the observed condition (a non-uniform, orange-colored substance on internal surfaces) was a result of corrosion. Although the dissolver vessel and coil corrode during dissolution operations, the high acid conditions are not consistent with the formation of ferrous oxides (i.e., orange/rust-colored corrosion products). In a subsequent investigation, SRNL performed dissolution experiments to determine if residues from the nylon bags used for Pu containment could have generated the orange discoloration following dissolution. When small pieces of a nylon bag were placed in boiling 8 M nitric acid solutions containing other components representative of the H-Canyon process, complete dissolution occurred almost immediately. No residues were obtained even when a nylon mass to volume ratio greater than 100 times the 6.1D dissolver value was used. Degradation products from the dissolution of nylon bags are not responsible for the discoloration observed in the dissolver.

  6. Organic aerogel microspheres

    DOE Patents [OSTI]

    Mayer, Steven T. (San Leandro, CA); Kong, Fung-Ming (Pleasanton, CA); Pekala, Richard W. (Pleasant Hill, CA); Kaschmitter, James L. (Pleasanton, CA)

    1999-01-01

    Organic aerogel microspheres which can be used in capacitors, batteries, thermal insulation, adsorption/filtration media, and chromatographic packings, having diameters ranging from about 1 micron to about 3 mm. The microspheres can be pyrolyzed to form carbon aerogel microspheres. This method involves stirring the aqueous organic phase in mineral oil at elevated temperature until the dispersed organic phase polymerizes and forms nonsticky gel spheres. The size of the microspheres depends on the collision rate of the liquid droplets and the reaction rate of the monomers from which the aqueous solution is formed. The collision rate is governed by the volume ratio of the aqueous solution to the mineral oil and the shear rate, while the reaction rate is governed by the chemical formulation and the curing temperature.

  7. Organic aerogel microspheres

    SciTech Connect (OSTI)

    Mayer, S.T.; Kong, F.M.; Pekala, R.W.; Kaschmitter, J.L.

    1999-06-01

    Organic aerogel microspheres are disclosed which can be used in capacitors, batteries, thermal insulation, adsorption/filtration media, and chromatographic packings, having diameters ranging from about 1 micron to about 3 mm. The microspheres can be pyrolyzed to form carbon aerogel microspheres. This method involves stirring the aqueous organic phase in mineral oil at elevated temperature until the dispersed organic phase polymerizes and forms nonstick gel spheres. The size of the microspheres depends on the collision rate of the liquid droplets and the reaction rate of the monomers from which the aqueous solution is formed. The collision rate is governed by the volume ratio of the aqueous solution to the mineral oil and the shear rate, while the reaction rate is governed by the chemical formulation and the curing temperature.

  8. Changes in soil organic matter driven by shifts in co-dominant plant species in a grassland

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of carbon sequestration. The quality and quantity of soil organic carbon is probably influenced. It is suggested that, in conservation projects based on higher carbon sequestration, the plant species with more sequestration, Plant species, Soil organic carbon, Vegetation type, Prangus uloptera stands. hal-00875310

  9. Carbon particles

    DOE Patents [OSTI]

    Hunt, Arlon J. (Oakland, CA)

    1984-01-01

    A method and apparatus whereby small carbon particles are made by pyrolysis of a mixture of acetylene carried in argon. The mixture is injected through a nozzle into a heated tube. A small amount of air is added to the mixture. In order to prevent carbon build-up at the nozzle, the nozzle tip is externally cooled. The tube is also elongated sufficiently to assure efficient pyrolysis at the desired flow rates. A key feature of the method is that the acetylene and argon, for example, are premixed in a dilute ratio, and such mixture is injected while cool to minimize the agglomeration of the particles, which produces carbon particles with desired optical properties for use as a solar radiant heat absorber.

  10. Carbon supercapacitors

    SciTech Connect (OSTI)

    Delnick, F.M.

    1993-11-01

    Carbon supercapacitors are represented as distributed RC networks with transmission line equivalent circuits. At low charge/discharge rates and low frequencies these networks approximate a simple series R{sub ESR}C circuit. The energy efficiency of the supercapacitor is limited by the voltage drop across the ESR. The pore structure of the carbon electrode defines the electrochemically active surface area which in turn establishes the volume specific capacitance of the carbon material. To date, the highest volume specific capacitance reported for a supercapacitor electrode is 220F/cm{sup 3} in aqueous H{sub 2}SO{sub 4} (10) and {approximately}60 F/cm{sup 3} in nonaqueous electrolyte (8).

  11. PREDICTION OF TOTAL DISSOLVED GAS EXCHANGE AT HYDROPOWER DAMS

    SciTech Connect (OSTI)

    Hadjerioua, Boualem; Pasha, MD Fayzul K; Stewart, Kevin M; Bender, Merlynn; Schneider, Michael L.

    2012-07-01

    Total dissolved gas (TDG) supersaturation in waters released at hydropower dams can cause gas bubble trauma in fisheries resulting in physical injuries and eyeball protrusion that can lead to mortality. Elevated TDG pressures in hydropower releases are generally caused by the entrainment of air in spillway releases and the subsequent exchange of atmospheric gasses into solution during passage through the stilling basin. The network of dams throughout the Columbia River Basin (CRB) are managed for irrigation, hydropower production, flood control, navigation, and fish passage that frequently result in both voluntary and involuntary spillway releases. These dam operations are constrained by state and federal water quality standards for TDG saturation which balance the benefits of spillway operations designed for Endangered Species Act (ESA)-listed fisheries versus the degradation to water quality as defined by TDG saturation. In the 1970s, the United States Environmental Protection Agency (USEPA), under the federal Clean Water Act (Section 303(d)), established a criterion not to exceed the TDG saturation level of 110% in order to protect freshwater and marine aquatic life. The states of Washington and Oregon have adopted special water quality standards for TDG saturation in the tailrace and forebays of hydropower facilities on the Columbia and Snake Rivers where spillway operations support fish passage objectives. The physical processes that affect TDG exchange at hydropower facilities have been studied throughout the CRB in site-specific studies and routine water quality monitoring programs. These data have been used to quantify the relationship between project operations, structural properties, and TDG exchange. These data have also been used to develop predictive models of TDG exchange to support real-time TDG management decisions. These empirically based predictive models have been developed for specific projects and account for both the fate of spillway and powerhouse flows in the tailrace channel and resultant exchange in route to the next downstream dam. Currently, there exists a need to summarize the general finding from operational and structural TDG abatement programs conducted throughout the CRB and for the development of a generalized prediction model that pools data collected at multiple projects with similar structural attributes. A generalized TDG exchange model can be tuned to specific projects and coupled with water regulation models to allow the formulation of optimal daily water regulation schedules subject to water quality constraints for TDG supersaturation. A generalized TDG exchange model can also be applied to other hydropower dams that affect TDG pressures in tailraces and can be used to develop alternative operational and structural measures to minimize TDG generation. It is proposed to develop a methodology for predicting TDG levels downstream of hydropower facilities with similar structural properties as a function of a set of variables that affect TDG exchange; such as tailwater depth, spill discharge and pattern, project head, and entrainment of powerhouse releases. TDG data from hydropower facilities located throughout the northwest region of the United States will be used to identify relationships between TDG exchange and relevant dependent variables. Data analysis and regression techniques will be used to develop predictive TDG exchange expressions for various structural categories.

  12. Soil carbon sequestration and land-use change: processes and potential

    E-Print Network [OSTI]

    Soil carbon sequestration and land-use change: processes and potential W . M . P O S T * and K . C to perennial vegetation, soil organic carbon can accumulate. This accumulation process essentially reverses some of the effects respon- sible for soil organic carbon losses from when the land was converted from

  13. Chemically Accelerated Carbon Mineralization: Chemical and Biological Catalytic Enhancement of Weathering of Silicate Minerals as Novel Carbon Capture and Storage

    SciTech Connect (OSTI)

    None

    2010-07-01

    IMPACCT Project: Columbia University is developing a process to pull CO2 out of the exhaust gas of coal-fired power plants and turn it into a solid that can be easily and safely transported, stored above ground, or integrated into value-added products (e.g. paper filler, plastic filler, construction materials, etc.). In nature, the reaction of CO2 with various minerals over long periods of time will yield a solid carbonate—this process is known as carbon mineralization. The use of carbon mineralization as a CO2 capture and storage method is limited by the speeds at which these minerals can be dissolved and CO2 can be hydrated. To facilitate this, Columbia University is using a unique process and a combination of chemical catalysts which increase the mineral dissolution rate, and the enzymatic catalyst carbonic anhydrase which speeds up the hydration of CO2.

  14. Cloud Seeding What is it.... "It is a science that can be used to control winds, suppress hail, dissolve fog or create

    E-Print Network [OSTI]

    Toohey, Darin W.

    , dissolve fog or create rain."...."assisting nature"...."Cloud seeding essentially helps that process along

  15. PIERS ONLINE, VOL. 5, NO. 7, 2009 637 Ventilation Efficiency and Carbon Dioxide (CO2) Concentration

    E-Print Network [OSTI]

    Halgamuge, Malka N.

    PIERS ONLINE, VOL. 5, NO. 7, 2009 637 Ventilation Efficiency and Carbon Dioxide (CO2) Concentration complex organic molecules being broken down to simpler molecules, such as carbon dioxide and water. Carbon dioxide waste is removed from the body through respiration. Carbon dioxide content in fresh air

  16. Black carbon in Arctic snow and its effect on surface albedo

    E-Print Network [OSTI]

    1 Black carbon in Arctic snow and its effect on surface albedo Stephen Warren, University wavelengths: ice is nearly transparent. Absorptive impurities: Black carbon (soot) Brown carbon (organics broadband albedo: 83% 71% (2) by addition of black carbon (BC) (20 ppb): 0.5% for r = 100 µm 1.6% for r

  17. Reactive transport modeling of stable carbon isotope fractionation in a multi-phase multi-component system during carbon sequestration

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Zhang, Shuo; DePaolo, Donald J.; Zheng, Liange; Mayer, Bernhard

    2014-12-31

    Carbon stable isotopes can be used in characterization and monitoring of CO2 sequestration sites to track the migration of the CO2 plume and identify leakage sources, and to evaluate the chemical reactions that take place in the CO2-water-rock system. However, there are few tools available to incorporate stable isotope information into flow and transport codes used for CO2 sequestration problems. We present a numerical tool for modeling the transport of stable carbon isotopes in multiphase reactive systems relevant to geologic carbon sequestration. The code is an extension of the reactive transport code TOUGHREACT. The transport module of TOUGHREACT was modifiedmore »to include separate isotopic species of CO2 gas and dissolved inorganic carbon (CO2, CO32-, HCO3-,…). Any process of transport or reaction influencing a given carbon species also influences its isotopic ratio. Isotopic fractionation is thus fully integrated within the dynamic system. The chemical module and database have been expanded to include isotopic exchange and fractionation between the carbon species in both gas and aqueous phases. The performance of the code is verified by modeling ideal systems and comparing with theoretical results. Efforts are also made to fit field data from the Pembina CO2 injection project in Canada. We show that the exchange of carbon isotopes between dissolved and gaseous carbon species combined with fluid flow and transport, produce isotopic effects that are significantly different from simple two-component mixing. These effects are important for understanding the isotopic variations observed in field demonstrations.« less

  18. Reactive transport modeling of stable carbon isotope fractionation in a multi-phase multi-component system during carbon sequestration

    SciTech Connect (OSTI)

    Zhang, Shuo [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); DePaolo, Donald J. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Zheng, Liange [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Mayer, Bernhard [Univ. of Calgary (Canada). Dept. of Geosciences

    2014-12-31

    Carbon stable isotopes can be used in characterization and monitoring of CO2 sequestration sites to track the migration of the CO2 plume and identify leakage sources, and to evaluate the chemical reactions that take place in the CO2-water-rock system. However, there are few tools available to incorporate stable isotope information into flow and transport codes used for CO2 sequestration problems. We present a numerical tool for modeling the transport of stable carbon isotopes in multiphase reactive systems relevant to geologic carbon sequestration. The code is an extension of the reactive transport code TOUGHREACT. The transport module of TOUGHREACT was modified to include separate isotopic species of CO2 gas and dissolved inorganic carbon (CO2, CO32-, HCO3-,…). Any process of transport or reaction influencing a given carbon species also influences its isotopic ratio. Isotopic fractionation is thus fully integrated within the dynamic system. The chemical module and database have been expanded to include isotopic exchange and fractionation between the carbon species in both gas and aqueous phases. The performance of the code is verified by modeling ideal systems and comparing with theoretical results. Efforts are also made to fit field data from the Pembina CO2 injection project in Canada. We show that the exchange of carbon isotopes between dissolved and gaseous carbon species combined with fluid flow and transport, produce isotopic effects that are significantly different from simple two-component mixing. These effects are important for understanding the isotopic variations observed in field demonstrations.

  19. "The disintegration of organic compounds by microorganisms is accompanied by the liberation of

    E-Print Network [OSTI]

    Lovley, Derek

    comple- ment of enzymes necessary to completely oxidize organic fuels to carbon dioxide is not yet they are `carbon-neutral'; the oxidation of the organic matter only releases recently fixed carbon back and sediments. The ubiquitous and innocuous properties of fuels for microbial fuel cells alleviates the need

  20. Dissolution of Irradiated Commercial UO2 Fuels in Ammonium Carbonate and Hydrogen Peroxide

    SciTech Connect (OSTI)

    Soderquist, Chuck Z.; Johnsen, Amanda M.; McNamara, Bruce K.; Hanson, Brady D.; Chenault, Jeffrey W.; Carson, Katharine J.; Peper, Shane M.

    2011-01-18

    We propose and test a disposition path for irradiated nuclear fuel using ammonium carbonate and hydrogen peroxide media. We demonstrate on a 13 g scale that >98% of the irradiated fuel dissolves. Subsequent expulsion of carbonate from the dissolver solution precipitates >95% of the plutonium, americium, curium, and substantial amounts of fission products, effectively partitioning the fuel at the dissolution step. Uranium can be easily recovered from solution by any of several means, such as ion exchange, solvent extraction, or direct precipitation. Ammonium carbonate can be evaporated from solution and recovered for re-use, leaving an extremely compact volume of fission products, transactinides, and uranium. Stack emissions are predicted to be less toxic, less radioactive, chemically simpler, and simpler to treat than those from the conventional PUREX process.

  1. Selecting activated carbon for water and wastewater treatability studies

    SciTech Connect (OSTI)

    Zhang, W.; Chang, Q.G.; Liu, W.D.; Li, B.J.; Jiang, W.X.; Fu, L.J.; Ying, W.C. [East China University of Chemical Technology, Shanghai (China)

    2007-10-15

    A series of follow-up investigations were performed to produce data for improving the four-indicator carbon selection method that we developed to identify high-potential activated carbons effective for removing specific organic water pollutants. The carbon's pore structure and surface chemistry are dependent on the raw material and the activation process. Coconut carbons have relatively more small pores than large pores; coal and apricot nutshell/walnut shell fruit carbons have the desirable pore structures for removing adsorbates of all sizes. Chemical activation, excessive activation, and/or thermal reactivation enlarge small pores, resulting in reduced phenol number and higher tannic acid number. Activated carbon's phenol, iodine, methylene blue, and tannic acid numbers are convenient indicators of its surface area and pore volume of pore diameters < 10, 10-15, 15-28, and > 28 angstrom, respectively. The phenol number of a carbon is also a good indicator of its surface acidity of oxygen-containing organic functional groups that affect the adsorptive capacity for aromatic and other small polar organics. The tannic acid number is an indicator of carbon's capacity for large, high-molecular-weight natural organic precursors of disinfection by-products in water treatment. The experimental results for removing nitrobenzene, methyl-tert-butyl ether, 4,4-bisphenol, humic acid, and the organic constituents of a biologically treated coking-plant effluent have demonstrated the effectiveness of this capacity-indicator-based method of carbon selection.

  2. On-line fast response device and method for measuring dissolved gas in a fluid

    DOE Patents [OSTI]

    Tutu, Narinder Kumar (Manorville, NY)

    2011-01-11

    A method and device for the measurement of dissolved gas within a fluid. The fluid, substantially a liquid, is pumped into a pipe. The flow of the fluid is temporally restricted, creating one or more low pressure regions. A measurement indicative of trapped air is taken before and after the restriction. The amount of dissolved air is calculated from the difference between the first and second measurements. Preferably measurements indicative of trapped air is obtained from one or more pressure transducers, capacitance transducers, or combinations thereof. In the alternative, other methods such as those utilizing x-rays or gamma rays may also be used to detect trapped air. Preferably, the fluid is a hydraulic fluid, whereby dissolved air in the fluid is detected.

  3. Carbon export and transfer to depth across the Southern Ocean Great Calcite Belt

    E-Print Network [OSTI]

    Lam, P. J.

    Sequestration of carbon by the marine biological pump depends on the processes that alter, remineralize, and preserve particulate organic carbon (POC) during transit to the deep ocean. Here, we present data collected from ...

  4. Understanding and engineering interfacial charge transfer of carbon nanotubes and graphene for energy and sensing applications

    E-Print Network [OSTI]

    Paulus, Geraldine L. C. (Geraldine Laura Caroline)

    2013-01-01

    Graphene is a one-atom thick planar monolayer of sp2 -bonded carbon atoms organized in a hexagonal crystal lattice. A single walled carbon nanotube (SWCNT) can be thought of as a graphene sheet rolled up into a seamless ...

  5. GEOC: Division of Geochemistry 208 -Copper sequestration by black carbon in

    E-Print Network [OSTI]

    Sparks, Donald L.

    GEOC: Division of Geochemistry 208 - Copper sequestration by black carbon in contaminated soil the quality of agricultural products and underground water and impacts the stability of soil organic carbon

  6. Carbon investment funds

    SciTech Connect (OSTI)

    2007-01-15

    The report is a study of the development of funds to invest in the purchase of carbon credits. It takes a look at the growing market for carbon credits, the rise of carbon investment funds, and the current state of carbon investing. Topics covered in the report include: Overview of climate change, greenhouse gases, and the Kyoto Protocols. Analysis of the alternatives for reducing carbon emissions including nitrous oxide reduction, coal mine methane capture and carbon capture and storage; Discussion of the different types of carbon credits; Discussion of the basics of carbon trading; Evaluation of the current status of carbon investing; and Profiles of 37 major carbon investment funds worldwide.

  7. Fermilab | About | Organization | Fermilab Organization | Explanation...

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

    of Symbols Line Organization: sectors, divisions, sections Line Organization Matrix Organization: centers, projects and programs utilizing resources spanning the entire...

  8. Quantity and Spatial Variability of Soil Carbon in the Conterminous United States Yinyan Guo, Ronald Amundson,* Peng Gong, and Qian Yu

    E-Print Network [OSTI]

    Yu, Qian

    , Ronald Amundson,* Peng Gong, and Qian Yu ABSTRACT We estimated the soil organic carbon (SOC) and soil

  9. On carbon footprints and growing energy use

    SciTech Connect (OSTI)

    Oldenburg, C.M.

    2011-06-01

    Could fractional reductions in the carbon footprint of a growing organization lead to a corresponding real reduction in atmospheric CO{sub 2} emissions in the next ten years? Curtis M. Oldenburg, head of the Geologic Carbon Sequestration Program of LBNL’s Earth Sciences Division, considers his own organization's carbon footprint and answers this critical question? In addressing the problem of energy-related greenhouse gas (GHG) emissions and climate change, it is essential that we understand which activities are producing GHGs and the scale of emission for each activity, so that reduction efforts can be efficiently targeted. The GHG emissions to the atmosphere of an individual or group are referred to as the ‘carbon footprint’. This terminology is entirely appropriate, because 85% of the global marketed energy supply comes from carbon-rich fossil fuel sources whose combustion produces CO{sub 2}, the main GHG causing global climate change. Furthermore, the direct relation between CO2 emissions and fossil fuels as they are used today makes energy consumption a useful proxy for carbon footprint. It would seem to be a simple matter to reduce energy consumption across the board, both individually and collectively, to help reduce our carbon footprints and therefore solve the energyclimate crisis. But just how much can we reduce carbon footprints when broader forces, such as growth in energy use, cause the total footprint to simultaneously expand? In this feature, I present a calculation of the carbon footprint of the Earth Sciences Division (ESD), the division in which I work at Lawrence Berkeley National Laboratory (LBNL), and discuss the potential for reducing this carbon footprint. It will be apparent that in terms of potential future carbon footprint reductions under projections of expected growth, ESD may be thought of as a microcosm of the situation of the world as a whole, in which alternatives to the business-as-usual use of fossil fuels are needed if absolute GHG emission reductions are to be achieved.

  10. Chlorofluorocarbons, Sulfur Hexafluoride, and Dissolved Permanent Gases in Ground Water from Selected Sites In and Near the Idaho National Engineering and Environmental Laboratory, Idaho, 1994 - 1997

    SciTech Connect (OSTI)

    Busenberg, E.; Plummer, L.N.; Bartholomay, R.C.; Wayland, J.E.

    1998-08-01

    From July 1994 through May 1997, the U.S. Geological Survey, in cooperations with the Department of Energy, sampled 86 wells completed in the Snake River Plain aquifer at and near the Idaho National Engineering and Environmental Laboratory (INEEL). The wells were sampled for a variety of constituents including one- and two-carbon halocarbons. Concentrations of dichlorodifluoromethane (CFC-12), trichlorofluoromethane (CFC-11), and trichlorotrifluororoethane (CFC-113) were determined. The data will be used to evaluate the ages of ground waters at INEEL. The ages of the ground water will be used to determine recharge rates, residence time, and travel time of water in the Snake River Plain aquifer in and near INEEL. The chromatograms of 139 ground waters are presented showing a large number of halomethanes, haloethanes, and haloethenes present in the ground waters underlying the INEEL. The chromatograms can be used to qualitatively evaluate a large number of contaminants at parts per trillion to parts per billion concentrations. The data can be used to study temporal and spatial distribution of contaminants in the Snake River Plain aquifer. Representative compressed chromatograms for all ground waters sampled in this study are available on two 3.5-inch high density computer disks. The data and the program required to decompress the data can be obtained from the U.S. Geological Survey office at Idaho Falls, Idaho. Sulfur hexafluoride (SF6) concentrations were measured in selected wells to determine the feasibility of using this environmental tracer as an age dating tool of ground water. Concentrations of dissolved nitrogen, argon, carbon dioxide, oxygen, and methane were measured in 79 ground waters. Concentrations of dissolved permanent gases are tabulated and will be used to evaluate the temperature of recharge of ground water in and near the INEEL.

  11. Carbon-Optimal and Carbon-Neutral Supply Chains

    E-Print Network [OSTI]

    Caro, F.; Corbett, C. J.; Tan, T.; Zuidwijk, R.

    2011-01-01

    Li, M. Daskin. 2009. Carbon Footprint and the Management ofThe Importance of Carbon Footprint Estimation Boundaries.Carbon accounting and carbon footprint - more than just

  12. Public Review Draft: A Method for Assessing Carbon Stocks, Carbon

    E-Print Network [OSTI]

    Public Review Draft: A Method for Assessing Carbon Stocks, Carbon Sequestration, and Greenhouse, and Zhu, Zhiliang, 2010, Public review draft; A method for assessing carbon stocks, carbon sequestration

  13. Temperature-driven decoupling of key phases of organic matter degradation in marine sediments

    E-Print Network [OSTI]

    Weston, Nathaniel B.

    Temperature-driven decoupling of key phases of organic matter degradation in marine sediments for review August 29, 2005) The long-term burial of organic carbon in sediments results in the net and atmosphere. Sediment microbial activity plays a major role in determining whether particulate organic carbon

  14. Hydrous pyrolysis/oxidation: in-ground thermal destruction of organic contaminants

    SciTech Connect (OSTI)

    Knauss, K. G.; Aines, R.D.; Dibley, M.J.; Leif, R.N.; Mew, D.A.

    1997-03-11

    Experimental work with organic solvents at Lawrence Livermore National Laboratory has suggested that in situ thermal oxidation of these compounds via hydrous pyrolysis forms the basis for a whole new remediation method, called hydrous pyrolysis oxidation. Preliminary results of hydrothermal oxidation using both dissolved 0{sub 2} gas and mineral oxidants present naturally in soils (e.g., MnO{sub 2}) demonstrate that TCE, TCA, and even PCE can be rapidly and completely degraded to benign products at moderate conditions, easily achieved in thermal remediation. Polycyclic aromatic hydrocarbons (PAHS) have an even larger thermodynamic driving force favoring oxidation, and they are also amenable to in situ destruction. Today, the principal treatment methods for chlorinated solvent- and PAH-contaminated soil are to remove it to landfills, or incinerate it on site. The most effective method for treating ground water, Dynamic Underground Stripping (Newmark et al., 1995), still involves removing the contaminant for destruction elsewhere. Hydrous pyrolysis/oxidation would eliminate the need for long-term use of expensive treatment facilities by converting all remaining contaminant to benign products (e.g., carbon dioxide, water, and chloride ion). The technique is expected to be applicable to dense non-aqueous phase liquids (DNAPLS) and dissolved organic components. Soil and ground water would be polished without bringing them to the surface. This would dramatically decrease the cost of final site closure efforts. Large-scale cleanup using hydrous pyrolysis/oxidation may cost less than $10/yd. The end product of hydrous pyrolysis/oxidation is expected to be a clean site. The delivery concept for hydrous pyrolysis/oxidation utilizes the established experience in heating large volumes of ground developed in the Dynamic Underground Stripping Demonstration (Newmark et al., 1995). Steam and possibly oxygen are injected together, building a heated, oxygenated zone in the subsurface. When injection is halted, the steam condenses and contaminated groundwater returns to the heated zone. It mixes with the condensate and oxygen, destroying any dissolved contaminants. This avoids many of the mixing problems encountered in other in situ oxidation schemes. In other oxidation schemes, an oxidizing reagent is injected into the subsurface resulting in the displacement of the contaminant. Without a return process such as the steam condensation, the contaminant and oxidant never mix. Using hydrous pyrolysis/oxidation, DNAPLs and dissolved contaminants may be destroyed in place, without surface treatment. This will improve the rate and efficiency of remediation by rendering the hazardous materials into benign ones via a completely in situ process. Because the subsurface is heated during this process, hydrous pyrolysis/oxidation also takes advantage of the large increase in mass transfer rates which make contaminant more available for destruction, such as increased diffusion out of silty sediments. Many remediation processes are limited by the access of the reactants to the contaminant, making mass-transfer limitations the bane of remediation efforts in low-permeability media. In preparation for testing this method at Lawrence Livermore National Laboratory (TCE in groundwater) and at a Southern California pole treating site (fire product with PAH and pentachlorophenol), we are developing a concept for the implementation of hydrous pyrolysis/oxidation through co-injection of steam and possibly small amounts of oxygen, as well as evaluating the rate at which hydrous pyrolysis/oxidation occurs due to the natural presence of mineral oxidants such as manganese oxides when the water temperature is raised. We are also determining the thermodynamic properties (e.g., solubility, Henry`s Law constants, etc.) of these hazardous compounds, as a function of T and P, in order to be able to predict effectiveness and required time for design purposes and to optimize clean-up through the use of process-oriented hydrologic transport and geochemistry models. In spite of

  15. Autonomous observations of the ocean biological carbon pump

    SciTech Connect (OSTI)

    Bishop, James K.B.

    2009-03-01

    Prediction of the substantial biologically mediated carbon flows in a rapidly changing and acidifying ocean requires model simulations informed by observations of key carbon cycle processes on the appropriate space and time scales. From 2000 to 2004, the National Oceanographic Partnership Program (NOPP) supported the development of the first low-cost fully-autonomous ocean profiling Carbon Explorers that demonstrated that year-round real-time observations of particulate organic carbon (POC) concentration and sedimentation could be achieved in the world's ocean. NOPP also initiated the development of a sensor for particulate inorganic carbon (PIC) suitable for operational deployment across all oceanographic platforms. As a result, PIC profile characterization that once required shipboard sample collection and shipboard or shore based laboratory analysis, is now possible to full ocean depth in real time using a 0.2W sensor operating at 24 Hz. NOPP developments further spawned US DOE support to develop the Carbon Flux Explorer, a free-vehicle capable of following hourly variations of particulate inorganic and organic carbon sedimentation from near surface to kilometer depths for seasons to years and capable of relaying contemporaneous observations via satellite. We have demonstrated the feasibility of real time - low cost carbon observations which are of fundamental value to carbon prediction and when further developed, will lead to a fully enhanced global carbon observatory capable of real time assessment of the ocean carbon sink, a needed constraint for assessment of carbon management policies on a global scale.

  16. Carbon Fiber Consortium | Partnerships | ORNL

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

    Carbon Fiber Consortium SHARE Carbon Fiber Consortium Oak Ridge Carbon Fiber Composites Consortium The Oak Ridge Carbon Fiber Composites Consortium was established in 2011 to...

  17. Wastewater Discharge, Nutrient Loading, and Dissolved Oxygen Dynamics in a Shallow Texas Bay 

    E-Print Network [OSTI]

    Schroer, Lee Allen

    2014-05-07

    In Oso Bay, a wastewater treatment plant acts as a source of eutrophication and may have measureable impact on the health of the bay. The objectives of this study were to create a model for modeling dissolved oxygen concentrations over time...

  18. Whole-stream metabolism: strategies for measuring and modeling diel trends of dissolved oxygen

    E-Print Network [OSTI]

    Dodds, Walter

    are estimated from changes in dissolved O2 concentration in the stream over time. An upstream­downstream O2], and use of temperature-corrected metabolic rates) is needed. We measured O2 upstream and downstream method is based on measurements at an upstream and a downstream point. Two-station methods are useful

  19. Did BP's oil-dissolving chemical make the spill By Kate Spinner

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Did BP's oil-dissolving chemical make the spill worse? By Kate Spinner Published: Monday, May 30, 2011 at 8:47 p.m. BP succeeded in sinking the oil from its blown well out of sight -- and keeping much chemicals. But the impact on the ecosystem as a whole may have been more damaging than the oil alone

  20. The Effects of Dissolved Halide Anions on Hydrogen Bonding in Liquid Water

    E-Print Network [OSTI]

    Geissler, Phillip

    that the statistics of hydrogen-bond strengths are only weakly modified beyond this first solvation shell infrared pump-probe measurements appear to indicate that dissolved ions only significantly affect connections between experimental observables and the statistics of HB geometries. In this contribution we

  1. MEMS Needle-type Sensor Array for in Situ Measurements of Dissolved

    E-Print Network [OSTI]

    Papautsky, Ian

    a multisensor device (1, 5, 16-18). Microelectromechanical systems (MEMS) technologies permit the integrationMEMS Needle-type Sensor Array for in Situ Measurements of Dissolved Oxygen and Redox Potential J I systems (MEMS) technologies. The MEA exhibits fast response times for both DO and ORP measurements

  2. Tracks of dissolved minerals Pictures from Opportunity's panoramic camera and microscopic

    E-Print Network [OSTI]

    Tracks of dissolved minerals Pictures from Opportunity's panoramic camera and microscopic imager is familiar to geologists as the sites where crystals of salt minerals form within rocks that sit in briny minerals. On the front: Scraping up clues Spirit's stuck right front wheel scraped a trench in the Mars

  3. Effects of applied voltages and dissolved oxygen on sustained power generation by microbial fuel cells

    E-Print Network [OSTI]

    Effects of applied voltages and dissolved oxygen on sustained power generation by microbial fuel to 0.3 mg/L during MFC operation was not found to adversely affect power generation over subsequent for up to 10 days and 10 hrs also did not affect power generation, as power rapidly returned to previous

  4. Effect of dissolved oxygen on stomach evacuation rate of juvenile red drum (Sciaenops ocellatus) 

    E-Print Network [OSTI]

    Becerra Illingworth, Jorge Alberto

    1998-01-01

    Juvenile red drum (Sciaenops ocellatus) weighing 19,7[]2.5 g, and acclimated to 10 ppt salinity and 25[]1[]C, were subjected to one of three dissolved oxygen (DO) regimes-- 7.5, 4.5, and 2.7[]0.5 mg O? 1?ą -- after consuming pelleted feed...

  5. Terrestrial Carbon Management Data from the Carbon Dioxide Information Analysis Center (CDIAC)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    CDIAC products are indexed and searchable through a customized interface powered by ORNL's Mercury search engine. Products include numeric data packages, publications, trend data, atlases, and models and can be searched for by subject area, keywords, authors, product numbers, time periods, collection sites, spatial references, etc. Some of the collections may also be included in the CDIAC publication Trends Online: A Compendium of Global Change Data. Most data sets, many with numerous data files, are free to download from CDIAC's ftp area. Collections under the broad heading of Terrestrial Carbon Management are organized as Carbon Accumulation with Cropland Management, Carbon Accumulation with Grassland Management, Carbon Loss Following Cultivation, Carbon Accumulation Following Afforestation, and Carbon Sources and Sinks Associated with U.S. Cropland Production.

  6. Compacted carbon for electrochemical cells

    DOE Patents [OSTI]

    Greinke, R.A.; Lewis, I.C.

    1997-10-14

    This invention provides compacted carbon that is useful in the electrode of an alkali metal/carbon electrochemical cell of improved capacity selected from the group consisting of: (a) coke having the following properties: (1) an x-ray density of at least 2.00 grams per cubic centimeters, (2) a closed porosity of no greater than 5%, and (3) an open porosity of no greater than 47%; and (b) graphite having the following properties: (1) an x-ray density of at least 2.20 grams per cubic centimeters, (2) a closed porosity of no greater than 5%, and (3) an open porosity of no greater than 25%. This invention also relates to an electrode for an alkali metal/carbon electrochemical cell comprising compacted carbon as described above and a binder. This invention further provides an alkali metal/carbon electrochemical cell comprising: (a) an electrode as described above, (b) a non-aqueous electrolytic solution comprising an organic aprotic solvent and an electrolytically conductive salt and an alkali metal, and (c) a counter electrode. 10 figs.

  7. Total Dissolved Gas Monitoring in Chum Salmon Spawning Gravels Below Bonneville Dam

    SciTech Connect (OSTI)

    Arntzen, Evan V.; Geist, David R.; Panther, Jennifer L.; Dawley, Earl

    2007-01-30

    At the request of the U.S. Army Corps of Engineers (Portland District), Pacific Northwest National Laboratory (PNNL) conducted research to determine whether total dissolved gas concentrations are elevated in chum salmon redds during spring spill operations at Bonneville Dam. The study involved monitoring the total dissolved gas levels at egg pocket depth and in the river at two chum salmon spawning locations downstream from Bonneville Dam. Dissolved atmospheric gas supersaturation generated by spill from Bonneville Dam may diminish survival of chum (Oncorhynchus keta) salmon when sac fry are still present in the gravel downstream from Bonneville Dam. However, no previous work has been conducted to determine whether total dissolved gas (TDG) levels are elevated during spring spill operations within incubation habitats. The guidance used by hydropower system managers to provide protection for pre-emergent chum salmon fry has been to limit TDG to 105% after allowing for depth compensation. A previous literature review completed in early 2006 shows that TDG levels as low as 103% have been documented to cause mortality in sac fry. Our study measured TDG in the incubation environment to evaluate whether these levels were exceeded during spring spill operations. Total dissolved gas levels were measured within chum salmon spawning areas near Ives Island and Multnomah Falls on the Columbia River. Water quality sensors screened at egg pocket depth and to the river were installed at both sites. At each location, we also measured dissolved oxygen, temperature, specific conductance, and water depth to assist with the interpretation of TDG results. Total dissolved gas was depth-compensated to determine when levels were high enough to potentially affect sac fry. This report provides detailed descriptions of the two study sites downstream of Bonneville Dam, as well as the equipment and procedures employed to monitor the TDG levels at the study sites. Results of the monitoring at both sites are then presented in both text and graphics. The findings and recommendations for further research are discussed, followed by a listing of the references cited in the report.

  8. Global distribution and sources of dissolved inorganic nitrogen export to the coastal zone: Results from a spatially explicit, global model

    E-Print Network [OSTI]

    Seitzinger, Sybil

    Global distribution and sources of dissolved inorganic nitrogen export to the coastal zone: Results dissolved inorganic nitrogen (DIN) export by rivers to coastal waters (NEWS-DIN). NEWS-DIN was developed as part of an internally consistent suite of global nutrient export models. Modeled and measured DIN

  9. Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard-Oeschger oscillations caused by variations

    E-Print Network [OSTI]

    Pedersen, Tom

    Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard glacial Indian and Pacific oceans sediments document millennial-scale fluctuations of subsurface dissolved Hemisphere of the Indian and Pacific oceans, consistent with the paleoclimate records. Cold periods

  10. Unsteady-state material balance model for a continuous rotary dissolver

    SciTech Connect (OSTI)

    Lewis, B.E.

    1984-09-01

    The unsteady-state continuous rotary dissolver material balance code (USSCRD) is a useful tool with which to study the performance of the rotary dissolver under a wide variety of operating conditions. The code does stepwise continuous material balance calculations around each dissolver stage and the digester tanks. Output from the code consists of plots and tabular information on the stagewise concentration profiles of UO{sub 2}, PuO{sub 2}, fission products, Pu(NO{sub 3}){sub 4}, UO{sub 2}(NO{sub 3}){sub 2}, fission product nitrates, HNO{sub 3}, H{sub 2}O, stainless steel, total particulate, and total fuel in pins. Other information about material transfers, stagewise liquid volume, material inventory, and dissolution performance is also provided. This report describes the development of the code, its limitations, key operating parameters, usage procedures, and the results of the analysis of several sets of operating conditions. Of primary importance in this work was the estimation of the steady-state heavy metal inventory in a 0.5-t/d dissolver drum. Values ranging from {similar_to}12 to >150 kg of U + Pu were obtained for a variety of operating conditions. Realistically, inventories are expected to be near the lower end of this range. Study of the variation of operating parameters showed significant effects on dissolver product composition from intermittent solids feed. Other observations indicated that the cycle times for the digesters and shear feed should be closely coupled in order to avoid potential problems with off-specification product. 19 references, 14 tables.

  11. Organizing Committee

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEYI/O Streams for Large-scaleOrganizationAboutOrganizingOrganizing

  12. Photophysics of carbon nanotubes

    E-Print Network [OSTI]

    Samsonidze, Georgii G

    2007-01-01

    This thesis reviews the recent advances made in optical studies of single-wall carbon nanotubes. Studying the electronic and vibrational properties of carbon nanotubes, we find that carbon nanotubes less than 1 nm in ...

  13. U.S. Department of Energy (DOE)--Surface Biogeochemical Research (SBR) 6th Annual PI Meeting: Abstracts

    E-Print Network [OSTI]

    Hawkes, Daniel S

    2011-01-01

    in iron and uranium effluent chemistry were difficult tochemistry (dissolved oxygen and dissolved organic carbon) over time, such that there were episodic periods of sulfate reduction and sulfite and uranium

  14. Carbon dioxide and climate

    SciTech Connect (OSTI)

    Not Available

    1990-10-01

    Scientific and public interest in greenhouse gases, climate warming, and global change virtually exploded in 1988. The Department's focused research on atmospheric CO{sub 2} contributed sound and timely scientific information to the many questions produced by the groundswell of interest and concern. Research projects summarized in this document provided the data base that made timely responses possible, and the contributions from participating scientists are genuinely appreciated. In the past year, the core CO{sub 2} research has continued to improve the scientific knowledge needed to project future atmospheric CO{sub 2} concentrations, to estimate climate sensitivity, and to assess the responses of vegetation to rising concentrations of CO{sub 2} and to climate change. The Carbon Dioxide Research Program's goal is to develop sound scientific information for policy formulation and governmental action in response to changes of atmospheric CO{sub 2}. The Program Summary describes projects funded by the Carbon Dioxide Research Program during FY 1990 and gives a brief overview of objectives, organization, and accomplishments.

  15. Organic Superconductors

    SciTech Connect (OSTI)

    Charles Mielke

    2009-02-27

    Intense magnetic fields are an essential tool for understanding layered superconductors. Fundamental electronic properties of organic superconductors are revealed in intense (60 tesla) magnetic fields. Properties such as the topology of the Fermi surface and the nature of the superconducting order parameter are revealed. With modest maximum critical temperatures~13K the charge transfer salt organic superconductors prove to be incredibly valuable materials as their electronically clean nature and layered (highly anisotropic) structures yield insights to the high temperature superconductors. Observation of de Haas-van Alphen and Shubnikov-de Haas quantum oscillatory phenomena, magnetic field induced superconductivity and re-entrant superconductivity are some of the physical phenomena observed in the charge transfer organic superconductors. In this talk, I will discuss the nature of organic superconductors and give an overview of the generation of intense magnetic fields; from the 60 tesla millisecond duration to the extreme 1000 tesla microsecond pulsed magnetic fields.

  16. Fly Ash Characteristics and Carbon Sequestration Potential

    SciTech Connect (OSTI)

    Palumbo, Anthony V.; Amonette, James E.; Tarver, Jana R.; Fagan, Lisa A.; McNeilly, Meghan S.; Daniels, William L.

    2007-07-20

    Concerns for the effects of global warming have lead to an interest in the potential for inexpensive methods to sequester carbon dioxide (CO2). One of the proposed methods is the sequestration of carbon in soil though the growth of crops or forests.4,6 If there is an economic value placed on sequestration of carbon dioxide in soil there may be an an opportunity and funding to utilize fly ash in the reclamation of mine soils and other degraded lands. However, concerns associated with the use of fly ash must be addressed before this practice can be widely adopted. There is a vast extent of degraded lands across the world that has some degree of potential for use in carbon sequestration. Degraded lands comprise nearly 2 X 109 ha of land throughout the world.7 Although the potential is obviously smaller in the United States, there are still approximately 4 X 106 ha of degraded lands that previously resulted from mining operations14 and an additional 1.4 X 108 ha of poorly managed lands. Thus, according to Lal and others the potential is to sequester approximately 11 Pg of carbon over the next 50 years.1,10 The realization of this potential will likely be dependent on economic incentives and the use of soil amendments such as fly ash. There are many potential benefits documented for the use of fly ash as a soil amendment. For example, fly ash has been shown to increase porosity, water-holding capacity, pH, conductivity, and dissolved SO42-, CO32-, HCO3-, Cl- and basic cations, although some effects are notably decreased in high-clay soils.8,13,9 The potential is that these effects will promote increased growth of plants (either trees or grasses) and result in greater carbon accumulation in the soil than in untreated degraded soils. This paper addresses the potential for carbon sequestration in soils amended with fly ash and examines some of the issues that should be considered in planning this option. We describe retrospective studies of soil carbon accumulation on reclaimed mine lands, leaching studies of fly ash and carbon sorption studies of fly ash.

  17. Toward Zero Carbon Energy Production Toward Zero Carbon Energy Production

    E-Print Network [OSTI]

    Narasayya, Vivek

    #12;Toward Zero Carbon Energy Production Toward Zero Carbon Energy Production Toward Zero Carbon Energy Production Toward Zero Carbon Energy Production Toward Zero Carbon Energy Production Toward Zero Carbon Energy Production Toward Zero Carbon Energy Production Toward Zero Carbon Energy Production Toward

  18. Method of making carbon-carbon composites

    DOE Patents [OSTI]

    Engle, Glen B. (16716 Martincoit Rd., Poway, CA 92064)

    1993-01-01

    A process for making 2D and 3D carbon-carbon composites having a combined high crystallinity, high strength, high modulus and high thermal and electrical conductivity. High-modulus/high-strength mesophase derived carbon fibers are woven into a suitable cloth. Layers of this easily graphitizible woven cloth are infiltrated with carbon material to form green composites. The carbonized composite is then impregnated several times with pitch by covering the composite with hot pitch under pressure. The composites are given a heat treatment between each impregnant step to crack up the infiltrated carbon and allow additional pitch to enter the microstructure during the next impregnation cycle. The impregnated composites are then given a final heat treatment in the range 2500.degree. to 3100.degree. C. to fully graphitize the fibers and the matrix carbon. The composites are then infiltrated with pyrolytic carbon by chemical vapor deposition in the range 1000.degree. C. to 1300.degree. C. at a reduced. pressure.

  19. Supplementary information1 S1: Estimation of the dissolved organic mass (DOM) concentrations in aqueous solutions3

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    (1). APCI-MS measurements of aqueous solutions by direct47 infusion of liquid solutions-MS measurements of aqueous solutions by direct47 infusion of liquid solutions, in the negative mode (a

  20. Colored dissolved organic matter and its influence on the satellite-based characterization of the ocean biosphere

    E-Print Network [OSTI]

    Maritorena, Stéphane

    . Res. Lett., 32, L20605, doi:10.1029/2005GL024310. [2] The global assessment of phytoplankton biomass]. The sheer size of the ocean and the costs associated with its in situ sampling have led to the deployment

  1. The Effects of Dissolved Organic Matter on Pollutant Removal and Formation in Aquatic Environment: From Stormwater to Drinking Water

    E-Print Network [OSTI]

    Hsu, Meng-Horng

    2012-01-01

    RELATIONSHIPS BETWEEN OCTANOL WATER PARTITION-COEFFICIENTGeochemistry of Natural Waters. Dr. W. Junk Publishers. :characterizing NOM. J. Am. Water Work Assoc. 1996, 88, (6),

  2. Large-volume ultrafiltration for the study of radiocarbon signatures and size vs. age relationships in marine dissolved organic matter

    E-Print Network [OSTI]

    Walker, B.D.; Beaupré, S.R.; Guilderson, T.P.; Druffel, E.R.M.; McCarthy, M.D.

    2011-01-01

    D C content vs. MW. At low CFs, UDOC samples have similar Dlected at extremely high CFs (and after dia?ltration) haveC-content at extre- mely high CFs. Models used in this study

  3. PII S0016-7037(00)00450-6 Terrestrially derived dissolved organic matter in the Chesapeake Bay and the Middle

    E-Print Network [OSTI]

    Guo, Laodong

    , recent resuspension events, and/or desorption of DOM from riverine POM buried deep in these sites waters (Hedges and Parker, 1976; Jahnke et al., 1990; Prahl et al., 1994; Bianchi et al., 1997), leading

  4. Characterization of dissolved organic matter in the rhizosphere of hyperaccumulator Sedum alfredii and its effect on the mobility of zinc

    E-Print Network [OSTI]

    Sparks, Donald L.

    HM from soil by concentrating them in the harvest- able parts (Chaney et al., 1997; McGrath and Zhao on Thlaspi caerulescens, has shown that concentrations of NH4NO3- extractable Zn in the rhizosphere and non) hyperaccumulator Pteris vittata does reduce both water-soluble As concentrations and different soil As fractions

  5. The Effects of Dissolved Organic Matter on Pollutant Removal and Formation in Aquatic Environment: From Stormwater to Drinking Water

    E-Print Network [OSTI]

    Hsu, Meng-Horng

    2012-01-01

    W. ; Stanley, S. J. , URBAN STORMWATER QUALITY - SUMMARY OFhydrocarbons in urban stormwater in Queensland, Australia.Heavy metals and PAHs in stormwater runoff from the Skyway

  6. Terrigenous dissolved organic matter in the Arctic Ocean and its transport to surface and deep waters of the North Atlantic

    E-Print Network [OSTI]

    Louchouarn, Patrick

    lignin phenols in polar surface waters are 7-fold to 16-fold higher than those in the Atlantic phenols provide some evidence of photochemical transformations of terrigenous DOM, but it appears the Arctic Ocean by microbial degradation is less clear and warrants further study. Physical transport

  7. The Effects of Dissolved Organic Matter on Pollutant Removal and Formation in Aquatic Environment: From Stormwater to Drinking Water

    E-Print Network [OSTI]

    Hsu, Meng-Horng

    2012-01-01

    HOPs pollution event happened in the water treatment plant,HOPs pollution event happened in the water treatment plant,

  8. Carbon Capture (Carbon Cycle 2.0)

    ScienceCinema (OSTI)

    Smit, Berend

    2011-06-08

    Berend Smit speaks at the Carbon Cycle 2.0 kick-off symposium Feb. 3, 2010. We emit more carbon into the atmosphere than natural processes are able to remove - an imbalance with negative consequences. Carbon Cycle 2.0 is a Berkeley Lab initiative to provide the science needed to restore this balance by integrating the Labs diverse research activities and delivering creative solutions toward a carbon-neutral energy future. http://carboncycle2.lbl.gov/

  9. PUBLISHED ONLINE: 21 NOVEMBER 2010 | DOI: 10.1038/NGEO1014 Rapid carbon sequestration at the termination of

    E-Print Network [OSTI]

    LETTERS PUBLISHED ONLINE: 21 NOVEMBER 2010 | DOI: 10.1038/NGEO1014 Rapid carbon sequestration sequestration of organic carbon could reflect the regrowth of carbon stocks in the biosphere or shallow ago, has been attributed to the release of thousands of petagrams of reduced carbon into the ocean

  10. Shallow Carbon Sequestration Demonstration Project

    SciTech Connect (OSTI)

    Pendergrass, Gary; Fraley, David; Alter, William; Bodenhamer, Steven

    2013-09-30

    The potential for carbon sequestration at relatively shallow depths was investigated at four power plant sites in Missouri. Exploratory boreholes were cored through the Davis Shale confining layer into the St. Francois aquifer (Lamotte Sandstone and Bonneterre Formation). Precambrian basement contact ranged from 654.4 meters at the John Twitty Energy Center in Southwest Missouri to over 1100 meters near the Sioux Power Plant in St. Charles County. Investigations at the John Twitty Energy Center included 3D seismic reflection surveys, downhole geophysical logging and pressure testing, and laboratory analysis of rock core and water samples. Plans to perform injectivity tests at the John Twitty Energy Center, using food grade CO{sub 2}, had to be abandoned when the isolated aquifer was found to have very low dissolved solids content. Investigations at the Sioux Plant and Thomas Hill Energy Center in Randolph County found suitably saline conditions in the St. Francois. A fourth borehole in Platte County was discontinued before reaching the aquifer. Laboratory analyses of rock core and water samples indicate that the St. Charles and Randolph County sites could have storage potentials worthy of further study. The report suggests additional Missouri areas for further investigation as well.

  11. Thermodynamic Complexity of Carbon Capture in Alkylamine-Functionalize...

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

    Thermodynamic Complexity of Carbon Capture in Alkylamine-Functionalized Metal-Organic Frameworks Previous Next List D. Wu, T. M. McDonald, Z. Quan, S. V. Ushakov, P. Zhang, J. R....

  12. Synthesis of Amides and Lactams in Supercritical Carbon Dioxide

    E-Print Network [OSTI]

    Mak, Xiao Yin

    Supercritical carbon dioxide can be employed as an environmentally friendly alternative to conventional organic solvents for the synthesis of a variety of carboxylic amides. The addition of amines to ketenes generated in ...

  13. Dynamics of decadally cycling carbon in subsurface soils

    E-Print Network [OSTI]

    Koarashi, Jun; Hockaday, William C; Masiello, Caroline A; Trumbore, Susan E

    2012-01-01

    of organic carbon in deep soil layers controlled by freshcarbon input G03033 from fresh liter to deep mineral soils,Soil Sci. Soc. Am. J. , 71, 347–354, doi:

  14. Energy Use and Carbon Emissions: Non-OECD Countries

    Reports and Publications (EIA)

    1994-01-01

    Presents world energy use and carbon emissions patterns, with particular emphasis on the non-OECD (Organization for Economic Cooperation and Development) countries (including the current and former centrally planned economies).

  15. Energy Carrier Transport In Surface-Modified Carbon Nanotubes 

    E-Print Network [OSTI]

    Ryu, Yeontack

    2012-11-30

    of organic molecules or inorganic nanoparticles, debundling of nanotubes by dispersing agents, and microwave irradiation. Because carbon nanotubes have unique carrier transport characteristics along a sheet of graphite in a cylindrical shape, the properties...

  16. Upper ocean model of dissolved atmospheric gases. Final report for the period 1 August 1991--31 May 1995

    SciTech Connect (OSTI)

    Schudlich, R.; Emerson, S.

    1996-05-01

    This report summarizes results from three years of funding for a modelling study of processes controlling the distribution of metabolic chemical tracers in surface waters. We determined concentrations of the gases O{sub 2}, Ar, N{sub 2}, and the stable isotope ratio ({sup 18}O/{sup 16}O) of molecular oxygen in surface waters at Station ALOHA in conjunction with the Global Ocean Flux Study (GOFS) Hawaiian Ocean Time-series project during the years 1989- 90 and 1992-93. Under this contract we have incorporated chemical tracers into an existing ocean mixed-layer model to simulate the physical processes controlling the distribution and seasonal cycle of dissolved gases in the upper ocean. The broad background of concurrent chemical, physical, and biological measurements at Station ALOHA provides enough redundancy of ``ground truth`` to assess the model`s accuracy. Biological oxygen production estimated from modelled chemical tracers agrees with estimates based on measurement of carbon fluxes into the deep ocean and nitrate fluxes into the upper ocean during 1989-90 and 1992-93, verifying for the first time the utility of chemical tracers for determining biological fluxes in the ocean. Our results suggest that in the euphotic zone (the upper 100 m of the ocean), the net biological O{sub 2} production is 1.0-2. 0 moles m{sup -2}yr{sup - 1}. Inert gas (Ar, N{sub 2}) supersaturation levels show that air and bubble injection are important modes of air-sea gas transfer in the Station ALOHA region.

  17. Soil Biology & Biochemistry 38 (2006) 29672970 Short communication

    E-Print Network [OSTI]

    Rilli, Matthias C.

    2006-01-01

    and can be lost in leachate. For two New Zealand soils, we showed that only insignificant amounts of GRSP-long experiment, representing a minute fraction of total leachate dissolved organic carbon (0.06%). Our data. Keywords: Dissolved organic carbon; Grassland; Carbon cycling; Soil fungi; Leachate Arbuscular mycorrhizal

  18. Carbonate "clumped" isotope signatures in aragonitic scleractinian and calcitic gorgonian deep-sea corals

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kimball, J.; Tripati, R. E.; Dunbar, R.

    2015-12-04

    Deep-sea corals are a potentially valuable archive of the temperature and ocean chemistry of intermediate and deep waters. Living in near constant temperature, salinity and pH, and having amongst the slowest calcification rates observed in carbonate-precipitating biological organisms, deep-sea corals can provide valuable constraints on processes driving mineral equilibrium and disequilibrium isotope signatures. Here we report new data to further develop "clumped" isotopes as a paleothermometer in deep-sea corals as well as to investigate mineral-specific, taxon-specific, and growth-rate related effects. Carbonate clumped isotope thermometry is based on measurements of the abundance of the doubly-substituted isotopologue 13C18O16O2 in carbonate minerals, analyzedmore »in CO2 gas liberated on phosphoric acid digestion of carbonates and reported as ?47 values. We analyzed ?47 in live-collected aragonitic scleractinian (Enallopsammia sp.) and calcitic gorgonian (Isididae and Coralliidae) deep-sea corals, and compared results to published data for other aragonitic scleractinian taxa. Measured ?47 values were compared to in situ temperatures and the relationship between ?47 and temperature was determined for each group to investigate taxon-specific effects. We find that aragonitic scleractinian deep-sea corals exhibit higher values than calcitic gorgonian corals and the two groups of coral produce statistically different relationship between ?47-temperature calibrations. These data are significant in the interpretation of all carbonate "clumped" isotope calibration data as they show that distinct ?47-temperature calibrations can be observed in different materials recovered from the same environment and analyzed using the same instrumentation, phosphoric acid composition, digestion temperature and technique, CO2 gas purification apparatus, and data handling. There are three possible explanations for the origin of these different calibrations. The offset between the corals of different mineralogy is in the same direction as published theoretical predictions for the offset between calcite and aragonite, although the magnitude of the offset is different. One possibility is that the deep-sea coral results reflect that crystals may attain nominal mineral equilibrium clumped isotope signatures only under conditions of extremely slow growth. In that case, a possible explanation for the attainment of disequilibrium bulk isotope signatures and equilibrium clumped isotope signatures by deep-sea corals is that extraordinarily slow growth rates can promote the occurrence of isotopic reordering in the interfacial region of growing crystals. We also cannot rule out a component of a biological "vital-effect" influencing clumped isotope signatures in one or both orders of coral. Based on published experimental data and theoretical calculations, these biological "vital" effects could arise from kinetic isotope effects due to the source of carbon used for calcification, temperature- and pH-dependent rates of CO2 hydration and/or hydroxylation, calcifying fluid pH, the activity of carbonic anhydrase, the residence time of dissolved inorganic carbon in the calcifying fluid, and calcification rate. A third possible explanation is the occurrence of variable acid digestion fractionation factors. Although a recent study has suggested that dolomite, calcite, and aragonite may have similar clumped isotope acid digestion fractionation factors, the influence of acid digestion kinetics on ?47 is a subject that warrants further investigation.« less

  19. Composite carbon foam electrode

    DOE Patents [OSTI]

    Mayer, Steven T. (San Leandro, CA); Pekala, Richard W. (Pleasant Hill, CA); Kaschmitter, James L. (Pleasanton, CA)

    1997-01-01

    Carbon aerogels used as a binder for granularized materials, including other forms of carbon and metal additives, are cast onto carbon or metal fiber substrates to form composite carbon thin film sheets. The thin film sheets are utilized in electrochemical energy storage applications, such as electrochemical double layer capacitors (aerocapacitors), lithium based battery insertion electrodes, fuel cell electrodes, and electrocapacitive deionization electrodes. The composite carbon foam may be formed by prior known processes, but with the solid particles being added during the liquid phase of the process, i.e. prior to gelation. The other forms of carbon may include carbon microspheres, carbon powder, carbon aerogel powder or particles, graphite carbons. Metal and/or carbon fibers may be added for increased conductivity. The choice of materials and fibers will depend on the electrolyte used and the relative trade off of system resistivty and power to system energy.

  20. Composite carbon foam electrode

    DOE Patents [OSTI]

    Mayer, S.T.; Pekala, R.W.; Kaschmitter, J.L.

    1997-05-06

    Carbon aerogels used as a binder for granulated materials, including other forms of carbon and metal additives, are cast onto carbon or metal fiber substrates to form composite carbon thin film sheets. The thin film sheets are utilized in electrochemical energy storage applications, such as electrochemical double layer capacitors (aerocapacitors), lithium based battery insertion electrodes, fuel cell electrodes, and electrocapacitive deionization electrodes. The composite carbon foam may be formed by prior known processes, but with the solid particles being added during the liquid phase of the process, i.e. prior to gelation. The other forms of carbon may include carbon microspheres, carbon powder, carbon aerogel powder or particles, graphite carbons. Metal and/or carbon fibers may be added for increased conductivity. The choice of materials and fibers will depend on the electrolyte used and the relative trade off of system resistivity and power to system energy. 1 fig.

  1. Method of making molten carbonate fuel cell ceramic matrix tape

    DOE Patents [OSTI]

    Maricle, Donald L. (226 Forest La., Glastonbury, CT 06033); Putnam, Gary C. (47 Walker St., Manchester, CT 06040); Stewart, Jr., Robert C. (1230 Copper Hill Rd., West Suffield, CT 06093)

    1984-10-23

    A method of making a thin, flexible, pliable matrix material for a molten carbonate fuel cell is described. The method comprises admixing particles inert in the molten carbonate environment with an organic polymer binder and ceramic particle. The composition is applied to a mold surface and dried, and the formed compliant matrix material removed.

  2. Research Article Airborne carbon deposition on a remote forested lake

    E-Print Network [OSTI]

    Pace, Michael L.

    allochthonous carbon sources and food webs (Cole et al., 2006). There are numerous pathways for terrestrial inputs of terrestrial particulate organic carbon (TPOC) were measured during summ- er stratification of TPOC were between 6:1 and 22:1 (molar), much lower than the values for terrestrial leaves which were

  3. Carbon aerogels: An update on structure, properties, and applications

    SciTech Connect (OSTI)

    Pekala, R.W.; Mayer, S.T.; Kaschmitter, J.L.; Kong, F.M.

    1993-07-01

    Aerogels are unique porous materials whose composition, structure, and properties can be controlled at the nanometer scale. This paper examines the synthesis of organic aerogels and their carbonized derivatives. Carbon aerogels have low electrical resistivity, high surface area, and a tunable pore size. These materials are finding applications as electrodes in double layer capacitors.

  4. Wildland fire emissions, carbon, and climate: Emission factors Shawn Urbanski

    E-Print Network [OSTI]

    Wildland fire emissions, carbon, and climate: Emission factors Shawn Urbanski Missoula Fire burning Greenhouse gases Emission factors a b s t r a c t While the vast majority of carbon emitted mixture of gases and aerosols. Primary emissions include sig- nificant amounts of CH4 and aerosol (organic

  5. Method for catalytic destruction of organic materials

    DOE Patents [OSTI]

    Sealock, Jr., L. John (Richland, WA); Baker, Eddie G. (Richland, WA); Elliott, Douglas C. (Richland, WA)

    1997-01-01

    A method is disclosed for converting waste organic materials into an innocuous product gas. The method comprises maintaining, in a pressure vessel, in the absence of oxygen, at a temperature of 250.degree. C. to 500.degree. C. and a pressure of at least 50 atmospheres, a fluid organic waste material, water, and a catalyst consisting essentially of reduced nickel in an amount sufficient to catalyze a reaction of the organic waste material to produce an innocuous product gas composed primarily of methane and carbon dioxide. The methane in the product gas may be burned to preheat the organic materials.

  6. Method for catalytic destruction of organic materials

    DOE Patents [OSTI]

    Sealock, L.J. Jr.; Baker, E.G.; Elliott, D.C.

    1997-05-20

    A method is disclosed for converting waste organic materials into an innocuous product gas. The method comprises maintaining, in a pressure vessel, in the absence of oxygen, at a temperature of 250 to 500 C and a pressure of at least 50 atmospheres, a fluid organic waste material, water, and a catalyst consisting essentially of reduced nickel in an amount sufficient to catalyze a reaction of the organic waste material to produce an innocuous product gas composed primarily of methane and carbon dioxide. The methane in the product gas may be burned to preheat the organic materials. 7 figs.

  7. CARBON DIOXIDE AS A FEEDSTOCK.

    SciTech Connect (OSTI)

    CREUTZ,C.; FUJITA,E.

    2000-12-09

    This report is an overview on the subject of carbon dioxide as a starting material for organic syntheses of potential commercial interest and the utilization of carbon dioxide as a substrate for fuel production. It draws extensively on literature sources, particularly on the report of a 1999 Workshop on the subject of catalysis in carbon dioxide utilization, but with emphasis on systems of most interest to us. Atmospheric carbon dioxide is an abundant (750 billion tons in atmosphere), but dilute source of carbon (only 0.036 % by volume), so technologies for utilization at the production source are crucial for both sequestration and utilization. Sequestration--such as pumping CO{sub 2} into sea or the earth--is beyond the scope of this report, except where it overlaps utilization, for example in converting CO{sub 2} to polymers. But sequestration dominates current thinking on short term solutions to global warming, as should be clear from reports from this and other workshops. The 3500 million tons estimated to be added to the atmosphere annually at present can be compared to the 110 million tons used to produce chemicals, chiefly urea (75 million tons), salicylic acid, cyclic carbonates and polycarbonates. Increased utilization of CO{sub 2} as a starting material is, however, highly desirable, because it is an inexpensive, non-toxic starting material. There are ongoing efforts to replace phosgene as a starting material. Creation of new materials and markets for them will increase this utilization, producing an increasingly positive, albeit small impact on global CO{sub 2} levels. The other uses of interest are utilization as a solvent and for fuel production and these will be discussed in turn.

  8. FLOWSHEET EVALUATION FOR THE DISSOLVING AND NEUTRALIZATION OF SODIUM REACTOR EXPERIMENT USED NUCLEAR FUEL

    SciTech Connect (OSTI)

    Daniel, W. E.; Hansen, E. K.; Shehee, T. C.

    2012-10-30

    This report includes the literature review, hydrogen off-gas calculations, and hydrogen generation tests to determine that H-Canyon can safely dissolve the Sodium Reactor Experiment (SRE; thorium fuel), Ford Nuclear Reactor (FNR; aluminum alloy fuel), and Denmark Reactor (DR-3; silicide fuel, aluminum alloy fuel, and aluminum oxide fuel) assemblies in the L-Bundles with respect to the hydrogen levels in the projected peak off-gas rates. This is provided that the number of L-Bundles charged to the dissolver is controlled. Examination of SRE dissolution for potential issues has aided in predicting the optimal batching scenario. The calculations detailed in this report demonstrate that the FNR, SRE, and DR-3 used nuclear fuel (UNF) are bounded by MURR UNF and may be charged using the controls outlined for MURR dissolution in a prior report.

  9. Electrochemical formation of hydroxide for enhancing carbon dioxide and acid gas uptake by a solution

    DOE Patents [OSTI]

    Rau, Gregory Hudson (Castro Valley, CA)

    2012-05-15

    A system is described for forming metal hydroxide from a metal carbonate utilizing a water electrolysis cell having an acid-producing anode and a hydroxyl-producing cathode immersed in a water solution of sufficient ionic content to allow an electric current to pass between the hydroxyl-producing cathode and the acid-producing anode. A metal carbonate, in particular water-insoluble calcium carbonate or magnesium carbonate, is placed in close proximity to the acid-producing anode. A direct current electrical voltage is provided across the acid-producing anode and the hydroxyl-producing cathode sufficient to generate acid at the acid-producing anode and hydroxyl ions at the hydroxyl-producing cathode. The acid dissolves at least part of the metal carbonate into metal and carbonate ions allowing the metal ions to travel toward the hydroxyl-producing cathode and to combine with the hydroxyl ions to form the metal hydroxide. The carbonate ions travel toward the acid-producing anode and form carbonic acid and/or water and carbon dioxide. Among other uses, the metal hydroxide formed can be employed to absorb acid gases such as carbon dioxide from a gas mixture. The invention can also generate hydrogen and oxidative gases such as oxygen or chlorine.

  10. Organization Chart

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEYI/O Streams for Large-scaleOrganization Chart Organization Charts

  11. Organizing Committee

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEYI/O Streams for Large-scaleOrganizationAbout EventsOrganizing

  12. Organizing Committee

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEYI/O Streams for Large-scaleOrganizationAboutOrganizing Committee

  13. Organizing Committee

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEYI/O Streams for Large-scaleOrganizationAboutOrganizing

  14. Carbon Nanotube Based Sensors

    SciTech Connect (OSTI)

    Jiang, Mian; Lin, Yuehe

    2006-11-01

    This review article provides a comprehensive review on sensors and biosensors based on functionalized carbon nanotubes.

  15. Carbon Monoxide Environmental Public

    E-Print Network [OSTI]

    The National Workgroup on Carbon Monoxide Surveillance Formed in April 2005 Membership: EPHT grantees Academic

  16. Radionuclides, inorganic constituents, organic compounds, and bacteria in water from selected wells and springs from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman Area, Idaho, 1990

    SciTech Connect (OSTI)

    Bartholomay, R.C.; Edwards, D.D. [Geological Survey, Idaho Falls, ID (United States); Campbell, L.J. [State of Idaho, Dept. of Water Resources (United States)

    1992-03-01

    The US Geological Survey and the Idaho Department of Water Resources, in response to a request from the US Department of Energy, sampled 19 sites as part of a long-term project to monitor water quality of the Snake River Plain aquifer from the southern boundary of the Idaho National Engineering Laboratory to the Hagerman area. Water samples were collected and analyzed for manmade pollutants and naturally occurring constituents. The samples were collected from seven irrigation wells, five domestic wells, two springs, one stock well, two dairy wells, one observation well, and one commercial well. Two quality assurance samples also were collected and analyzed. The water samples were analyzed for selected radionuclides, inorganic constituents, organic compounds, and bacteria. None of the radionuclides, inorganic constituents, or organic compounds exceeded the established maximum contaminant levels for drinking water. Most of the radionuclide and inorganic constituent concentrations exceeded their respective reporting levels. All samples analyzed for surfactants and dissolved organic carbon had concentrations that exceeded their reporting level. Toluene concentrations exceeded the reporting level in one water sample. Two samples contained fecal coliform bacteria counts that exceeded established maximum contaminant levels for drinking water.

  17. Mesoporous carbon materials

    DOE Patents [OSTI]

    Dai, Sheng; Fulvio, Pasquale Fernando; Mayes, Richard T.; Wang, Xiqing; Sun, Xiao-Guang; Guo, Bingkun

    2014-09-09

    A conductive mesoporous carbon composite comprising conductive carbon nanoparticles contained within a mesoporous carbon matrix, wherein the conductive mesoporous carbon composite possesses at least a portion of mesopores having a pore size of at least 10 nm and up to 50 nm, and wherein the mesopores are either within the mesoporous carbon matrix, or are spacings delineated by surfaces of said conductive carbon nanoparticles when said conductive carbon nanoparticles are fused with each other, or both. Methods for producing the above-described composite, devices incorporating them (e.g., lithium batteries), and methods of using them, are also described.

  18. Vitrification of organics-containing wastes

    DOE Patents [OSTI]

    Bickford, D.F.

    1995-01-01

    A process for stabilizing organics-containing waste materials and recovery metals therefrom, and a waste glass product made according to the process are described. Vitrification of wastes such as organic ion exchange resins, electronic components and the like can be accomplished by mixing at least one transition metal oxide with the wastes, and, if needed, glass formers to compensate for a shortage of silicates or other glass formers in the wastes. The transition metal oxide increases the rate of oxidation of organic materials in the wastes to improve the composition of the glass-forming mixture: at low temperatures, the oxide catalyzes oxidation of a portion of the organics in the waste; at higher temperatures, the oxide dissolves and the resulting oxygen ions oxidize more of the organics; and at vitrification temperatures, the metal ions conduct oxygen into the melt to oxidize the remaining organics. In addition, the transition metal oxide buffers the redox potential of the glass melt so that metals such as Au, Pt, Ag, and Cu separate form the melt in the metallic state and can be recovered. After the metals are recovered, the remainder of the melt is allowed to cool and may subsequently be disposed of. The product has good leaching resistance and can be disposed of in an ordinary landfill, or, alternatively, used as a filler in materials such as concrete, asphalt, brick and tile.

  19. Vitrification of organics-containing wastes

    DOE Patents [OSTI]

    Bickford, D.F.

    1997-09-02

    A process is described for stabilizing organics-containing waste materials and recovering metals therefrom, and a waste glass product made according to the process is also disclosed. Vitrification of wastes such as organic ion exchange resins, electronic components and the like can be accomplished by mixing at least one transition metal oxide with the wastes, and, if needed, glass formers to compensate for a shortage of silicates or other glass formers in the wastes. The transition metal oxide increases the rate of oxidation of organic materials in the wastes to improve the composition of the glass-forming mixture: at low temperatures, the oxide catalyzes oxidation of a portion of the organics in the waste; at higher temperatures, the oxide dissolves and the resulting oxygen ions oxidize more of the organics; and at vitrification temperatures, the metal ions conduct oxygen into the melt to oxidize the remaining organics. In addition, the transition metal oxide buffers the redox potential of the glass melt so that metals such as Au, Pt, Ag, and Cu separate from the melt in the metallic state and can be recovered. After the metals are recovered, the remainder of the melt is allowed to cool and may subsequently be disposed of. The product has good leaching resistance and can be disposed of in an ordinary landfill, or, alternatively, used as a filler in materials such as concrete, asphalt, brick and tile. 1 fig.

  20. Acid sorption regeneration process using carbon dioxide

    DOE Patents [OSTI]

    King, C. Judson (Kensington, CA); Husson, Scott M. (Anderson, SC)

    2001-01-01

    Carboxylic acids are sorbed from aqueous feedstocks onto a solid adsorbent in the presence of carbon dioxide under pressure. The acids are freed from the sorbent phase by a suitable regeneration method, one of which is treating them with an organic alkylamine solution thus forming an alkylamine-carboxylic acid complex which thermally decomposes to the desired carboxylic acid and the alkylamine.

  1. Nanocomposite fibers and film containing polyolefin and surface-modified carbon nanotubes

    DOE Patents [OSTI]

    Chu,Benjamin (Setauket, NY); Hsiao, Benjamin S. (Setauket, NY)

    2010-01-26

    Methods for modifying carbon nanotubes with organic compounds are disclosed. The modified carbon nanotubes have enhanced compatibility with polyolefins. Nanocomposites of the organo-modified carbon nanotubes and polyolefins can be used to produce both fibers and films having enhanced mechanical and electrical properties, especially the elongation-to-break ratio and the toughness of the fibers and/or films.

  2. 19.1 Introduction Carbon sequestration programs on land and in the

    E-Print Network [OSTI]

    Jackson, Robert B.

    Chapter 19 19.1 Introduction Carbon sequestration programs on land and in the oceans are gaining sequestration programs emphasize storing carbon in soil organic matter in agri- cultural fields,in woody sequestration and management include the feasibil- ity and permanence of the carbon sequestered, the scale

  3. Global Change Biology (2000) 6, 317328 Soil Carbon Sequestration and Land-Use Change: Processes and

    E-Print Network [OSTI]

    2000-01-01

    Global Change Biology (2000) 6, 317­328 Soil Carbon Sequestration and Land-Use Change: Processes in enhanced soil carbon sequestration with changes in land-use and soil management. We review literature, and indicates the relative importance of some factors that influence the rates of organic carbon sequestration

  4. Recent Leaf-Litter-Derived Carbon Is Not a Major Source for Mineral Soil Microbial Communities

    E-Print Network [OSTI]

    Post, Wilfred M.

    Recent Leaf-Litter-Derived Carbon Is Not a Major Source for Mineral Soil Microbial Communities mineral soil microbes. ·The results provided quantitative evidence that root-derived C is the major (>60: Microbial communities in soil A horizons derive their carbon from several potential sources: organic carbon

  5. Method for separating contaminants from solution employing an organic-stabilized metal-hydroxy gel

    DOE Patents [OSTI]

    Alexander, Donald H. (212 High Meadows, Richland, WA 99352)

    1996-01-01

    Metals and organics are extracted from solution by co-precipitating them with a gel comprising aluminum hydroxide and a complexing agent such as EDTA. After the gel is processed to remove the metals and organics, it can be recycled for further use by dissolving it in a high-pH solution, leaving no secondary waste stream. A number of alternative complexing agents perform better than EDTA.

  6. Carbon Film Electrodes For Super Capacitor Applications

    DOE Patents [OSTI]

    Tan, Ming X. (Livermore, CA)

    1999-07-20

    A method for treating an organic polymer material, preferably a vinylidene chloride/vinyl chloride copolymer (Saran) to produce a flat sheet of carbon film material having a high surface area (.apprxeq.1000 m.sup.2 /g) suitable as an electrode material for super capacitor applications. The method comprises heating a vinylidene chloride/vinyl chloride copolymer film disposed between two spaced apart graphite or ceramic plates to a first temperature of about 160.degree. C. for about 14 hours to form a stabilized vinylidene chloride/vinyl chloride polymer film, thereafter heating the stabilized film to a second temperature of about 750.degree. C. in an inert atmosphere for about one hour to form a carbon film; and finally activating the carbon film to increase the surface area by heating the carbon film in an oxidizing atmosphere to a temperature of at least 750-850.degree. C. for between 1-6 hours.

  7. Soil Biology & Biochemistry 39 (2007) 27012711 Carbon structure and enzyme activities in alpine and forest ecosystems

    E-Print Network [OSTI]

    Neff, Jason

    2007-01-01

    : Pyrolysis-gas chromatography/mass spectrometry; Py-GC/MS; Enzymes; Microbe; Carbon; Chemistry; Soil organicSoil Biology & Biochemistry 39 (2007) 2701­2711 Carbon structure and enzyme activities in alpine of soil organic matter fractions and its relationship to biological processes remains uncertain. We used

  8. Doping of carbon foams for use in energy storage devices

    DOE Patents [OSTI]

    Mayer, Steven T. (San Leandro, CA); Pekala, Richard W. (Pleasant Hill, CA); Morrison, Robert L. (Modesto, CA); Kaschmitter, James L. (Pleasanton, CA)

    1994-01-01

    A polymeric foam precursor, wetted with phosphoric acid, is pyrolyzed in an inert atmosphere to produce an open-cell doped carbon foam, which is utilized as a lithium intercalation anode in a secondary, organic electrolyte battery. Tests were conducted in a cell containing an organic electrolyte and using lithium metal counter and reference electrodes, with the anode located therebetween. Results after charge and discharge cycling, for a total of 6 cycles, indicated a substantial increase in the energy storage capability of the phosphorus doped carbon foam relative to the undoped carbon foam, when used as a rechargeable lithium ion battery.

  9. Doping of carbon foams for use in energy storage devices

    DOE Patents [OSTI]

    Mayer, S.T.; Pekala, R.W.; Morrison, R.L.; Kaschmitter, J.L.

    1994-10-25

    A polymeric foam precursor, wetted with phosphoric acid, is pyrolyzed in an inert atmosphere to produce an open-cell doped carbon foam, which is utilized as a lithium intercalation anode in a secondary, organic electrolyte battery. Tests were conducted in a cell containing an organic electrolyte and using lithium metal counter and reference electrodes, with the anode located there between. Results after charge and discharge cycling, for a total of 6 cycles, indicated a substantial increase in the energy storage capability of the phosphorus doped carbon foam relative to the undoped carbon foam, when used as a rechargeable lithium ion battery. 3 figs.

  10. A measurement of the absorption of liquid argon scintillation light by dissolved nitrogen at the part-per-million level

    E-Print Network [OSTI]

    Jones, Benjamin James Poyner

    We report on a measurement of the absorption length of scintillation light in liquid argon due to dissolved nitrogen at the part-per-million (ppm) level. We inject controlled quantities of nitrogen into a high purity volume ...

  11. Microwave-assisted synthesis of carbon nanotubes from tannin, lignin, and derivatives

    SciTech Connect (OSTI)

    Viswanathan, Tito

    2014-06-17

    A method of synthesizing carbon nanotubes. In one embodiment, the method includes the steps of: (a) dissolving a first amount of a first transition-metal salt and a second amount of a second transition-metal salt in water to form a solution; (b) adding a third amount of tannin to the solution to form a mixture; (c) heating the mixture to a first temperature for a first duration of time to form a sample; and (d) subjecting the sample to a microwave radiation for a second duration of time effective to produce a plurality of carbon nanotubes.

  12. Electrolytic production of neodymium without perfluorinated carbon compounds on the offgases

    DOE Patents [OSTI]

    Keller, Rudolf (Export, PA); Larimer, Kirk T. (Pittsburgh, PA)

    1998-01-01

    A method of producing neodymium in an electrolytic cell without formation of perfluorinated carbon gases (PFCs), the method comprising the steps of providing an electrolyte in the electrolytic cell and providing an anode in an anode region of the electrolyte and providing a cathode in a cathode region of the electrolytic cell. Dissolving an oxygen-containing neodymium compound in the electrolyte in the anode region and maintaining a more intense electrolyte circulation in the anode region than in the cathode region. Passing an electrolytic current between said anode and said cathode and depositing neodymium metal at the cathode, preventing the formation of perfluorinated carbon gases by limiting anode over voltage.

  13. Direct formation of aerogels by sol-gel polymerizations of alkoxysilanes in supercritical carbon dioxide

    SciTech Connect (OSTI)

    Loy, D.A.; Yamanaka, A.; Carpenter, J.P. [Sandia National Labs., Albuquerque, NM (United States); [Univ. of California, Irvine, CA (United States)] [and others

    1997-12-31

    Sol-gel polymerization of alkoxysilanes in supercritical carbon dioxide (SCCD) was used to directly prepare aerogels. Polymerizations of tetramethoxysilane (TMOS) and 1,4-bis(triethoxysilyl)benzene (BESP) were performed by dissolving the monomers and formic acid in supercritical carbon dioxide (SCCD). Monolithic gels were obtained in under 12 hours. The silica and polysilsesquioxane gels were readily dried to afford aerogels by slowly venting the SCCD. The aerogels were high surface area mesoporous materials that were characterized by solid state NMR, SEM, TEM, and gas sorption porosimetry.

  14. Desalination with carbon aerogel electrodes. Revision 1

    SciTech Connect (OSTI)

    Farmer, J.C.; Richardson, J.H.; Fix, D.V. [Lawrence Livermore National Lab., CA (United States); Thomson, S.L.; May, S.C. [Bechtel National, Inc., San Francisco, CA (United States)

    1996-12-04

    Electrically regenerated electrosorption process (carbon aerogel CDI) was developed by LLNL for continuously removing ionic impurities from aqueous streams. A salt solution flows in a channel formed by numerous pairs of parallel carbon aerogel electrodes. Each electrode has a very high BET surface area (2-5.4x10{sup 6}ft{sup 2}lb{sup -1} or 400-1100 m{sup 2}g{sup -1}) and very low electrical resistivity ({le}40 m{Omega}). Ions are removed from the electrolyte by the electric field and electrosorbed onto the carbon aerogel. It is concluded that carbon aerogel CDI may be an energy-efficient alternative to electrodialysis and reverse osmosis for desalination of brackish water ({le}5000 ppM). The intrinsic energy required by this process is about QV/2, where Q is the stored electrical charge and V is the voltage between the electrodes, plus losses. Estimated requirement for desalination of a 2000 ppM feed is -0.53-2.5 Wh/gal{sup -1} (0.5-2.4 kJ L{sup -1}), depending on voltage, flow rate, cell dimensions, aerogel density, recovery ratio, etc. This assumes that 50-70% of the stored electrical energy is reclaimed during regeneration (electrical discharge). Though the energy requirement for desalination of sea water is also low, this application will be much more difficult. Additional work will be required for desalination of streams that contain more than 5000 ppM total dissolved solids (2000 ppM will require electrochemical cells with extremely tight, demanding tolerances). At this present time, the process is best suited for streams with dilute impurities, as recently demonstrated during a field test at LLNL Treatment Facility C.

  15. Carbon fuel cells with carbon corrosion suppression

    DOE Patents [OSTI]

    Cooper, John F. (Oakland, CA)

    2012-04-10

    An electrochemical cell apparatus that can operate as either a fuel cell or a battery includes a cathode compartment, an anode compartment operatively connected to the cathode compartment, and a carbon fuel cell section connected to the anode compartment and the cathode compartment. An effusion plate is operatively positioned adjacent the anode compartment or the cathode compartment. The effusion plate allows passage of carbon dioxide. Carbon dioxide exhaust channels are operatively positioned in the electrochemical cell to direct the carbon dioxide from the electrochemical cell.

  16. Carbon Dioxide Separation from Flue Gas by Phase Enhanced Absorption

    SciTech Connect (OSTI)

    Tim Fout

    2007-06-30

    A new process, phase enhanced absorption, was invented. The method is carried out in an absorber, where a liquid carrier (aqueous solution), an organic mixture (or organic compound), and a gas mixture containing a gas to be absorbed are introduced from an inlet. Since the organic mixture is immiscible or at least partially immiscible with the liquid carrier, the organic mixture forms a layer or small parcels between the liquid carrier and the gas mixture. The organic mixture in the absorber improves mass transfer efficiency of the system and increases the absorption rate of the gas. The organic mixture serves as a transportation media. The gas is finally accumulated in the liquid carrier as in a conventional gas-liquid absorption system. The presence of the organic layer does not hinder the regeneration of the liquid carrier or recovery of the gas because the organic layer is removed by a settler after the absorption process is completed. In another aspect, the system exhibited increased gas-liquid separation efficiency, thereby reducing the costs of operation and maintenance. Our study focused on the search of the organic layer or transportation layer to enhance the absorption rate of carbon dioxide. The following systems were studied, (1) CO{sub 2}-water system and CO{sub 2}-water-organic layer system; (2) CO{sub 2}-Potassium Carbonate aqueous solution system and CO{sub 2}-Potassium Carbonate aqueous solution-organic layer system. CO{sub 2}-water and CO{sub 2}-Potassium Carbonate systems are the traditional gas-liquid absorption processes. The CO{sub 2}-water-organic layer and CO{sub 2}-Potassium Carbonate-organic layer systems are the novel absorption processes, phase enhanced absorption. As we mentioned early, organic layer is used for the increase of absorption rate, and plays the role of transportation of CO{sub 2}. Our study showed that the absorption rate can be increased by adding the organic layer. However, the enhanced factor is highly depended on the liquid mass transfer coefficients for the CO{sub 2}-water-organic layer system. For the CO{sub 2}-Potassium Carbonate aqueous solution-organic layer system, the enhanced factor is not only dependent on the liquid mass transfer coefficients, but also the chemical reaction rates.

  17. Carbon Nanostructure-Based Sensors

    E-Print Network [OSTI]

    Sarkar, Tapan

    2012-01-01

    Control of Single-Walled Carbon Nanotube Functionalization.M. S. Characterizing carbon nanotube samples with resonancewith a Single-Walled Carbon Nanotube Capacitor. Science

  18. Determination of Total Petroleum Hydrocarbons (TPH) Using Total Carbon Analysis

    SciTech Connect (OSTI)

    Ekechukwu, A.A.

    2002-05-10

    Several methods have been proposed to replace the Freon(TM)-extraction method to determine total petroleum hydrocarbon (TPH) content. For reasons of cost, sensitivity, precision, or simplicity, none of the replacement methods are feasible for analysis of radioactive samples at our facility. We have developed a method to measure total petroleum hydrocarbon content in aqueous sample matrixes using total organic carbon (total carbon) determination. The total carbon content (TC1) of the sample is measured using a total organic carbon analyzer. The sample is then contacted with a small volume of non-pokar solvent to extract the total petroleum hydrocarbons. The total carbon content of the resultant aqueous phase of the extracted sample (TC2) is measured. Total petroleum hydrocarbon content is calculated (TPH = TC1-TC2). The resultant data are consistent with results obtained using Freon(TM) extraction followed by infrared absorbance.

  19. Metallic carbon materials

    DOE Patents [OSTI]

    Cohen, Marvin Lou (Berkeley, CA); Crespi, Vincent Henry (Darien, IL); Louie, Steven Gwon Sheng (Berkeley, CA); Zettl, Alexander Karlwalter (Kensington, CA)

    1999-01-01

    Novel metallic forms of planar carbon are described, as well as methods of designing and making them. Nonhexagonal arrangements of carbon are introduced into a graphite carbon network essentially without destroying the planar structure. Specifically a form of carbon comprising primarily pentagons and heptagons, and having a large density of states at the Fermi level is described. Other arrangements of pentagons and heptagons that include some hexagons, and structures incorporating squares and octagons are additionally disclosed. Reducing the bond angle symmetry associated with a hexagonal arrangement of carbons increases the likelihood that the carbon material will have a metallic electron structure.

  20. Terrestrial Analysis of the Organic Component

    E-Print Network [OSTI]

    they formed, these large bodies cannot provide many insights into the nature of the raw starting materials organics is of great interest, both because these materials are thought to represent a reservoir of the original carbon-containing materials from which everything else in our solar system was made and because

  1. Tailoring the properties of organic aerogels

    SciTech Connect (OSTI)

    Not Available

    1993-05-01

    We have recently succeeded in producing a new class of organic (or carbon) aerogels whose electrical, mechanical, and other properties are superior to those of the metal alkoxides. By tailoring properties to specific applications, we hope to achieve aerogels with even better performance. We have already tested carbon aerogels for use in inertial-confinement fusion targets and are currently studying applications to other technologies, such as battery electrodes, catalyst supports, and gas filters. In several of these applications, the permeability of the carbon aerogels-that is, their resistance to fluid flow-is crucial to their performance. Here, we describe briefly the synthesis of organic aerogels and present the results of our permeability studies.

  2. SYNTHESIS AND EMERGING IDEAS Decomposition of soil organic matter from boreal black

    E-Print Network [OSTI]

    Neff, Jason

    using pyrolysis gas chromatography- mass spectrometry prior to incubation, and after incubation on soils Pyrolysis GC/MS Á Soil organic carbon Introduction Boreal soils have been accumulating carbon (C) sinceSYNTHESIS AND EMERGING IDEAS Decomposition of soil organic matter from boreal black spruce forest

  3. Use of iron salts to control dissolved sulfide in trunk sewers

    SciTech Connect (OSTI)

    Padival, N.A.; Kimbell, W.A. [County Sanitation District of Los Angeles County, Whittier, CA (United States); Redner, J.A. [County Sanitation District of Los Angeles County, Compton, CA (United States)

    1995-11-01

    Sewer headspace H{sub 2}S reduction by precipitating dissolved sulfide in wastewater was investigated using iron salt (FeCl{sub 3} and FeCl{sub 2}). Full-scale experiments were conducted in a 40-km (25 mi) sewer with an average flow of 8.7 m{sup 3}/s (200 mgd). Results were sensitive to total Fe dosages and Fe(III)/Fe(II) blend ratios injected. A concentration of 16 mg/L total Fe and a blend ratio of 1.9:1 [Fe(III):Fe(II)] reduced dissolved sulfide levels by 97%. Total sulfide and headspace H{sub 2}S were reduced by 63% and 79%, respectively. Liquid and gas-phase sulfide reductions were largely due to the effective precipitation of sulfide with Fe(III) and Fe(II) and the limited volatilization of H{sub 2}S, respectively. Oxidation of sulfide in the presence of Fe(II) and minute amounts of O{sub 2} may have occurred. A combination of Fe(III) and Fe(II) proved more effective than either salt alone. By using excess Fe(III), dissolved sulfide can be reduced to undetectable levels. No specific relation between the concentration of Fe or Fe(III)/Fe(II) blend ratio and sewer crown pH was inferred. Iron salts may retard crown corrosion rates by precipitating free sulfide and reducing its release to the sewer headspace as H{sub 2}S. A mechanism to inhibit certain responsible bacteria was not established in the 40-km (25 mi) sewer.

  4. Organizing Committee

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEYI/O Streams for Large-scaleOrganizationAbout Events

  5. Organizing Committee

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEYI/O Streams for Large-scaleOrganizationAbout

  6. Development of a SREX flowsheet for the separation of strontium from dissolved INEEL zirconium calcine

    SciTech Connect (OSTI)

    Law, J.D.; Wood, D.J.; Todd, T.A.

    1999-01-01

    Laboratory experimentation has indicated that the SREX process is effective for partitioning {sup 90}Sr from acidic radioactive waste solutions located at the Idaho Nuclear Technology and Engineering Center. These laboratory results were used to develop a flowsheet for countercurrent testing of the SREX process with dissolved pilot plant calcine. Testing was performed using 24 stages of 2-cm diameter centrifugal contactors which are installed in the Remote Analytical Laboratory hot cell. Dissolved Run No.64 pilot plant calcine spiked with {sup 85}Sr was used as feed solution for the testing. The flowsheet tested consisted of an extraction section (0.15 M 4{prime},4{prime}(5{prime})-di-(tert-butylcyclohexo)-18-crown-6 and 1.5 M TBP in Isopar-L.), a 1.0 M NaNO{sub 3} scrub section to remove extracted K from the SREX solvent, a 0.01 M HNO{sub 3} strip section for the removal of Sr from the SREX solvent, a 0.25 M Na2CO{sub 3} wash section to remove degradation products from the solvent, and a 0.1 M HNO{sub 3} rinse section. The behavior of {sup 85}Sr, Na, K, Al, B, Ca, Cr, Fe, Ni, and Zr was evaluated. The described flowsheet successfully extracted {sup 85}Sr from the dissolved pilot plant calcine with a removal efficiency of 99.6%. Distribution coefficients for {sup 85}Sr ranged from 3.6 to 4.5 in the extraction section. With these distribution coefficients a removal efficiency of approximately >99.99% was expected. It was determined that the lower than expected removal efficiency can be attributed to a stage efficiency of only 60% in the extraction section. Extracted K was effectively scrubbed from the SREX solvent with the 1.0 M NaNO{sub 3} resulting in only 6.4% of the K in the HLW strip product. Sodium was not extracted from the dissolved calcine by the SREX solvent; however, the use of a 1.0 M NaNO{sub 3} scrub solution resulted in a Na concentration of 70 mg/L (12.3% of the feed concentration) in the HLW strip product. Al, B, Ca, Cr, Fe, Ni, and Zr were determined to be essentially inextractable.

  7. Development of a SREX Flowsheet for the Separation of Strontium from Dissolved INEEL Zirconium Calcine

    SciTech Connect (OSTI)

    Law, Jack Douglas; Wood, David James; Todd, Terry Allen

    1999-02-01

    Laboratory experimentation has indicated that the SREX process is effective for partitioning 90 Sr from acidic radioactive waste solutions located at the Idaho Nuclear Technology and Engineering Center. These laboratory results were used to develop a flowsheet for countercurrent testing of the SREX process with dissolved pilot plant calcine. Testing was performed using 24 stages of 2-cm diameter centrifugal contactors which are installed in the Remote Analytical Laboratory hot cell. Dissolved Run #64 pilot plant calcine spiked with 85 Sr was used as feed solution for the testing. The flowsheet tested consisted of an extraction section (0.15 M 4',4'(5')-di-(tert-butylcyclohexo)-18-crown-6 and 1.5 M TBP in Isopar-L.), a 1.0 M NaNO3 scrub section to remove extracted K from the SREX solvent, a 0.01 M HNO3 strip section for the removal of Sr from the SREX solvent, a 0.25 M Na2CO3 wash section to remove degradation products from the solvent, and a 0.1 M HNO3 rinse section. The behavior of 85 Sr, Na, K, Al, B, Ca, Cr, Fe, Ni, and Zr was evaluated. The described flowsheet successfully extracted 85 Sr from the dissolved pilot plant calcine with a removal efficiency of 99.6%. Distribution coefficients for 85 Sr ranged from 3.6 to 4.5 in the extraction section. With these distribution coefficients a removal efficiency of approximately >99.99% was expected. It was determined that the lower than expected removal efficiency can be attributed to a stage efficiency of only 60% in the extraction section. Extracted K was effectively scrubbed from the SREX solvent with the 1.0 M NaNO3 resulting in only 6.4% of the K in the HLW strip product. Sodium was not extracted from the dissolved calcine by the SREX solvent; however, the use of a 1.0 M NaNO3 scrub solution resulted in a Na concentration of 70 mg/L (12.3% of the feed concentration) in the HLW strip product. Al, B, Ca, Cr, Fe, Ni, and Zr were determined to be essentially inextractable.

  8. The effect of the use of plastic sampling containers on laboratory measurements of dissolved oxygen

    SciTech Connect (OSTI)

    Fehring, J.P.

    1990-10-01

    Dissolved oxygen (DO) concentrations are often used to define the water quality of a stream or reservoir. In the Tennessee Valley, there is a commonly held belief that water quality in general, and DO in particular, is declining in TVA reservoirs. In 1980, TVA conducted a study of DO trends in the tailraces of Tennessee River Dams and found a downward trend in most reservoirs, with the greatest decrease in the downstream reservoirs. This report examines a change in sampling procedures which may have contributed to the perception of declining DO. 6 refs., 3 figs., 10 tabs.

  9. Laboratory Studies of the Effects of Pressure and Dissolved Gas Supersaturation on Turbine-Passed Fish

    SciTech Connect (OSTI)

    Neitzel, Duane A.

    2009-09-14

    Migratory and resident fish in the Columbia River Basin are exposed to stresses associated with hydroelectric power production, including changes in pressure as they pass through turbines and dissolved gas supersaturation (resulting from the release of water from the spillway). To examine pressure changes as a source of turbine-passage injury and mortality, Pacific Northwest National Laboratory scientists conducted specific tests using a hyperbaric chamber. Tests were designed to simulate Kaplan turbine passage conditions and to quantify the response of fish to rapid pressure changes, with and without the complication of fish being acclimated to gas-supersaturated water.

  10. Carbon nanotube nanoelectrode arrays

    DOE Patents [OSTI]

    Ren, Zhifeng (Newton, MA); Lin, Yuehe (Richland, WA); Yantasee, Wassana (Richland, WA); Liu, Guodong (Fargo, ND); Lu, Fang (Burlingame, CA); Tu, Yi (Camarillo, CA)

    2008-11-18

    The present invention relates to microelectode arrays (MEAs), and more particularly to carbon nanotube nanoelectrode arrays (CNT-NEAs) for chemical and biological sensing, and methods of use. A nanoelectrode array includes a carbon nanotube material comprising an array of substantially linear carbon nanotubes each having a proximal end and a distal end, the proximal end of the carbon nanotubes are attached to a catalyst substrate material so as to form the array with a pre-determined site density, wherein the carbon nanotubes are aligned with respect to one another within the array; an electrically insulating layer on the surface of the carbon nanotube material, whereby the distal end of the carbon nanotubes extend beyond the electrically insulating layer; a second adhesive electrically insulating layer on the surface of the electrically insulating layer, whereby the distal end of the carbon nanotubes extend beyond the second adhesive electrically insulating layer; and a metal wire attached to the catalyst substrate material.

  11. ESM 271 Carbon Footprints and Carbon Accounting Instructor: Sangwon Suh

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    1 ESM 271 Carbon Footprints and Carbon Accounting Instructor: Sangwon Suh Bren hall 3422, suh Week 1: Introduction to carbon footprint and carbon account - Background: carbon awareness, major out a report or a web site about carbon footprint results of a product or of a company. Write a two

  12. Big Sky Carbon Atlas

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    (Acknowledgment to the Big Sky Carbon Sequestration Partnership (BSCSP); see home page at http://www.bigskyco2.org/)

  13. Metal filled porous carbon

    DOE Patents [OSTI]

    Gross, Adam F. (Los Angeles, CA); Vajo, John J. (West Hills, CA); Cumberland, Robert W. (Malibu, CA); Liu, Ping (Irvine, CA); Salguero, Tina T. (Encino, CA)

    2011-03-22

    A porous carbon scaffold with a surface and pores, the porous carbon scaffold containing a primary metal and a secondary metal, where the primary metal is a metal that does not wet the surface of the pores of the carbon scaffold but wets the surface of the secondary metal, and the secondary metal is interspersed between the surface of the pores of the carbon scaffold and the primary metal.

  14. Neutron Scattering Studies of Liquid on or Confined in Nano- and Mesoporous Carbons, Including Carbide-Derived Carbons

    SciTech Connect (OSTI)

    Wesolowski, David J

    2014-07-01

    This project involved the synthesis of microporous graphitic-carbon powders with subnanometer average pore size, and very narrow pore size distributions, and the use of these materials in experimental studies of pore-fluid structure and dynamics. Samples of carbide-derived carbon powder, synthesized by extraction of the metal cations from TiC by a high temperature chlorination process, followed by high temperature vacuum annealing, were prepared by Ranjan Dash and his associates at CRADA partner Y-Carbon, Inc. The resulting material had average pore sizes ranging from 5 to 8 . These powders were used in two experiments conducted by researchers involved in the Energy Frontier Research Center Directed by David J. Wesolowski at ORNL, the Fluid Interface Reactions, Structures and Transport (FIRST) Center. FIRST-funded researchers at Drexel University collaborated with scientists at the Paul Scherrer Institute, Switzerland, to measure the expansion and contraction of the microporous carbon particles during charging and discharging of supercapactor electrodes composed of these particles (Hantell et al., 2011, Electrochemistry Communications, v. 13, pp. 1221-1224.) in an electrolyte composed of tetraethylammonium tetrafluoroborate dissolved in acetonitrile. In the second experiment, researchers at Oak Ridge National Laboratory and Drexel University conducted quasielastic neutron scattering studies of the diffusional dynamics of water imbibed into the micropores of the same material (Chathoth et al., 2011, EuroPhysics Journal, v. 95, pp. 56001/1-6). These studies helped to establish the role of pores approaching the size of the solvent and dissolved ions in altering diffusional dynamics, ion transport and physical response of conducting substrates to ion desolvation and entry into subnamometer pores.

  15. Investigation of vertical distribution and morphology of indigenous organic matter Sleeping Bear site, Michigan

    SciTech Connect (OSTI)

    West, C.C. [Environmental Protection Agency, Ada, OK (United States); Lyon, W.G.; Ross, D.L. [Robert S. Kerr Environmental Research Lab., Ada, OK (United States)] [and others

    1994-11-01

    This study evaluates the nature and origin of particulate organic carbon and organic coatings on aquifer sands upgradient from a fuel spill site near the Sleeping Bear Dunes National Lakeshore in Michigan. The distribution of carbon was found to be highly complex due to the occurrence of high organic carbon horizons, bounded above and below by high carbonate sediments. The organic coatings on the sands were examined using white light and fluorescence microscopy and by scanning electron microscopy. Core samples were analyzed for organic and inorganic carbon, solution pH, humic/fulvic acid ratios, and insoluable organic matter content (that is, humin) as function of depth from the ground surface. The organic geochemistry of the soil profile at this site was found to be significantly influenced by the carbonates producing a sharp boundary of precipitated organic matter. This boundary was followed by coatings of predominantly fulvic acid salts on mineral grains deeper in the soil column. The coatings extended into the aquifer. The existence of native organic films on sand grains is well documented in the soils literature. The study reported here was greatly aided by this information and provides the framework for future studies concerning the influence of carbon distribution, chemical identity, and morphology on contaminant fate and transport processes. 56 refs., 9 figs., 2 tabs.

  16. Carbon Footprint Towson University

    E-Print Network [OSTI]

    Fath, Brian D.

    Carbon Footprint Towson University GHG Inventory for Educational Institutes Getting Starting.TM The Carbon Footprint 8 The Constellation Experience A Broad Inventory 1. Scope I-Direct Emissions works.TM The Carbon Footprint 10 The Constellation Experience A Broad Inventory 3. Scope III

  17. Intro to Carbon Sequestration

    ScienceCinema (OSTI)

    None

    2010-01-08

    NETL's Carbon Sequestration Program is helping to develop technologies to capture, purify, and store carbon dioxide (CO2) in order to reduce greenhouse gas emissions without adversely influencing energy use or hindering economic growth. Carbon sequestration technologies capture and store CO2 that would otherwise reside in the atmosphere for long periods of time.

  18. Intro to Carbon Sequestration

    SciTech Connect (OSTI)

    2008-03-06

    NETL's Carbon Sequestration Program is helping to develop technologies to capture, purify, and store carbon dioxide (CO2) in order to reduce greenhouse gas emissions without adversely influencing energy use or hindering economic growth. Carbon sequestration technologies capture and store CO2 that would otherwise reside in the atmosphere for long periods of time.

  19. Supercritical separation process for complex organic mixtures

    DOE Patents [OSTI]

    Chum, Helena L. (Arvada, CO); Filardo, Giuseppe (Palermo, IT)

    1990-01-01

    A process is disclosed for separating low molecular weight components from complex aqueous organic mixtures. The process includes preparing a separation solution of supercritical carbon dioxide with an effective amount of an entrainer to modify the solvation power of the supercritical carbon dioxide and extract preselected low molecular weight components. The separation solution is maintained at a temperature of at least about 70.degree. C. and a pressure of at least about 1,500 psi. The separation solution is then contacted with the organic mixtures while maintaining the temperature and pressure as above until the mixtures and solution reach equilibrium to extract the preselected low molecular weight components from the organic mixtures. Finally, the entrainer/extracted components portion of the equilibrium mixture is isolated from the separation solution.

  20. Supercritical separation process for complex organic mixtures

    DOE Patents [OSTI]

    Chum, H.L.; Filardo, G.

    1990-10-23

    A process is disclosed for separating low molecular weight components from complex aqueous organic mixtures. The process includes preparing a separation solution of supercritical carbon dioxide with an effective amount of an entrainer to modify the solvation power of the supercritical carbon dioxide and extract preselected low molecular weight components. The separation solution is maintained at a temperature of at least about 70 C and a pressure of at least about 1,500 psi. The separation solution is then contacted with the organic mixtures while maintaining the temperature and pressure as above until the mixtures and solution reach equilibrium to extract the preselected low molecular weight components from the organic mixtures. Finally, the entrainer/extracted components portion of the equilibrium mixture is isolated from the separation solution. 1 fig.

  1. Mineral mesopore effects on nitrogenous organic matter Andrew R. Zimmermana,

    E-Print Network [OSTI]

    Chorover, Jon

    as sequestration of pollutants in soils and sediments (Luthy et al., 1997), turnover of natural soil organic carbon that organic matter (OM) may be protected from enzymatic degradation by sequestration within mineral mesopores observations. These results provide a potential mechanism for the selective sequestration and preservation

  2. A three-phase free boundary problem with melting ice and dissolving gas

    E-Print Network [OSTI]

    Maurizio Ceseri; John M. Stockie

    2014-11-05

    We develop a mathematical model for a three-phase free boundary problem in one dimension that involves the interactions between gas, water and ice. The dynamics are driven by melting of the ice layer, while the pressurized gas also dissolves within the meltwater. The model incorporates a Stefan condition at the water-ice interface along with Henry's law for dissolution of gas at the gas-water interface. We employ a quasi-steady approximation for the phase temperatures and then derive a series solution for the interface positions. A non-standard feature of the model is an integral free boundary condition that arises from mass conservation owing to changes in gas density at the gas-water interface, which makes the problem non-self-adjoint. We derive a two-scale asymptotic series solution for the dissolved gas concentration, which because of the non-self-adjointness gives rise to a Fourier series expansion in eigenfunctions that do not satisfy the usual orthogonality conditions. Numerical simulations of the original governing equations are used to validate the series approximations.

  3. Melody Meyer: Organic Foods Distributor

    E-Print Network [OSTI]

    Farmer, Ellen

    2010-01-01

    are into green building, reducing carbon footprint, trackingour carbon footprint. There aren’t many companies that areuse, offsetting our carbon footprint. The Rockland facility

  4. Kinetics and Modeling of Dissolved PhosphorusExport from a Tile-Drained Agricultural Watershed

    E-Print Network [OSTI]

    David, Mark B.

    of these parameters include humidity, slope, peat area percentage, minor till plain area, carbonate till area, exposed of pollutants such as chemical oxygen demand Y. Xue, M.B. David, and L.E. Gentry, Dep. of Natural Resources

  5. GEOC R Lee Penn Sunday, March 25, 2012 12 -Biogeochemical transformation of Fe-and Mn-along a redox gradient: Implications for carbon sequestration

    E-Print Network [OSTI]

    Sparks, Donald L.

    a redox gradient: Implications for carbon sequestration within the Christina River Basin Critical Zone States Organic carbon (C)-mineral complexation mechanism is crucial in C sequestration. It is a function

  6. Comparison of the Carbon System Parameters at the Global CO2 Survey Crossover Locations in the North and South Pacific Ocean, 1990-1996

    SciTech Connect (OSTI)

    Feely, Richard A [NOAA, Pacific Marine Environmental Laboratory (PMEL); Lamb, Marilyn F. [NOAA, Pacific Marine Environmental Laboratory (PMEL); Greeley, Dana J. [NOAA, Pacific Marine Environmental Laboratory (PMEL); Wanninkhof, Rik [NOAA, Atlantic Oceanographic and Meteorological Laboratory (AOML)

    1999-10-01

    As a collaborative program to measure global ocean carbon inventories and provide estimates of the anthropogenic carbon dioxide (C02) uptake by the oceans. the National Oceanic and Atmospheric Administration and the U.S. Department of Energy have sponsored the collection of ocean carbon measurements as part of the World Ocean Circulation Experiment and Ocean-Atmosphere Carbon Exchange Study cruises. The cruises discussed here occurred in the North and South Pacific from 1990 through 1996. The carbon parameters from these 30 crossover locations have been compared to ensure that a consistent global data set emerges from the survey cruises. !'he results indicate that for dissolved inorganic carbon. fugacity of C02• and pH. the a~:,rreements at most crossover locations are well within the design specifications for the global CO) survey: whereas. in the case of total alkaliniry. the agreement between crossover locations is not as close.

  7. Isoreticular metal-organic frameworks, process for forming the same, and systematic design of pore size and functionality therein, with application for gas storage

    DOE Patents [OSTI]

    Yaghi, Omar M.; Eddaoudi, Mohamed; Li, Hailian; Kim, Jaheon; Rosi, Nathaniel

    2005-08-16

    An isoreticular metal-organic framework (IRMOF) and method for systematically forming the same. The method comprises the steps of dissolving at least one source of metal cations and at least one organic linking compound in a solvent to form a solution; and crystallizing the solution under predetermined conditions to form a predetermined IRMOF. At least one of functionality, dimension, pore size and free volume of the IRMOF is substantially determined by the organic linking compound.

  8. Using Renewable Energy Purchases to Achieve Institutional Carbon Goals: A Review of Current Practices and Considerations

    SciTech Connect (OSTI)

    Bird, L.; Sumner, J.

    2011-01-01

    With organizations and individuals increasingly interested in accounting for their carbon emissions, greater attention is being placed on how to account for the benefits of various carbon mitigation actions available to consumers and businesses. Generally, organizations can address their own carbon emissions through energy efficiency, fuel switching, on-site renewable energy systems, renewable energy purchased from utilities or in the form of renewable energy certificates (RECs), and carbon offsets. This paper explores the role of green power and carbon offsets in carbon footprinting and the distinctions between the two products. It reviews how leading greenhouse gas (GHG) reporting programs treat green power purchases and discusses key issues regarding how to account for the carbon benefits of renewable energy. It also discusses potential double counting if renewable energy generation is used in multiple markets.

  9. Cruise Report Regional Monitoring Program

    E-Print Network [OSTI]

    -point and end of the cruise. Samples for the analysis of other trace elements (i.e., cadmium, chromium, copper, dissolved organic carbon, chlorophyll a, ammonium, nitrate, nitrite, and orthophosphate) were retained, nitrate, nitrite, orthophosphate), and dissolved organic carbon. Collect water samples for analysis

  10. Cruise Report Regional Monitoring Program

    E-Print Network [OSTI]

    elements (i.e., cadmium, chromium, copper, lead, nickel, silver, and zinc) and most ancillary measurements (i.e., salinity, total suspended solids, dissolved organic carbon, chlorophyll a, ammonium, nitrate, nitrate, nitrite, orthophosphate, silicate), and dissolved organic carbon. Collect water samples

  11. Cruise Report Regional Monitoring Program

    E-Print Network [OSTI]

    for the analysis of other trace elements (cadmium, chromium, copper, lead, nickel, silver, and zinc) and ancillary measurements (salinity, total suspended solids, dissolved organic carbon, chlorophyll a, ammonium, nitrate, nutrients (ammonium, nitrate, nitrite, orthophosphate, silicate), and dissolved organic carbon. 4) Collect

  12. Organic fuel cells and fuel cell conducting sheets

    DOE Patents [OSTI]

    Masel, Richard I. (Champaign, IL); Ha, Su (Champaign, IL); Adams, Brian (Savoy, IL)

    2007-10-16

    A passive direct organic fuel cell includes an organic fuel solution and is operative to produce at least 15 mW/cm.sup.2 when operating at room temperature. In additional aspects of the invention, fuel cells can include a gas remover configured to promote circulation of an organic fuel solution when gas passes through the solution, a modified carbon cloth, one or more sealants, and a replaceable fuel cartridge.

  13. Significance of Isotopically Labile Organic Hydrogen in Thermal Maturation of Organic Matter

    SciTech Connect (OSTI)

    Arndt Schimmelmann; Maria Mastalerz

    2010-03-30

    Isotopically labile organic hydrogen in fossil fuels occupies chemical positions that participate in isotopic exchange and in chemical reactions during thermal maturation from kerogen to bitumen, oil and gas. Carbon-bound organic hydrogen is isotopically far less exchangeable than hydrogen bound to nitrogen, oxygen, or sulfur. We explore why organic hydrogen isotope ratios express a relationship with organic nitrogen isotope ratios in kerogen at low to moderate maturity. We develop and apply new techniques to utilize organic D/H ratios in organic matter fractions and on a molecular level as tools for exploration for fossil fuels and for paleoenvironmental research. The scope of our samples includes naturally and artificially matured substrates, such as coal, shale, oil and gas.

  14. SOUTHWEST REGIONAL PARTNERSHIP ON CARBON SEQUESTRATION

    SciTech Connect (OSTI)

    Brian McPherson; Rick Allis; Barry Biediger; Joel Brown; Jim Cappa; George Guthrie; Richard Hughes; Eugene Kim; Robert Lee; Dennis Leppin; Charles Mankin; Orman Paananen; Rajesh Pawar; Tarla Peterson; Steve Rauzi; Jerry Stuth; Genevieve Young

    2004-11-01

    The Southwest Partnership Region includes six whole states, including Arizona, Colorado, Kansas, New Mexico, Oklahoma, and Utah, roughly one-third of Texas, and significant portions of adjacent states. The Partnership comprises a large, diverse group of expert organizations and individuals specializing in carbon sequestration science and engineering, as well as public policy and outreach. The main objective of the Southwest Partnership project is to achieve an 18% reduction in carbon intensity by 2012. The Partnership made great progress in this first year. Action plans for possible Phase II carbon sequestration pilot tests in the region are almost finished, including both technical and non-technical aspects necessary for developing and carrying out these pilot tests. All partners in the Partnership are taking an active role in evaluating and ranking optimum sites and technologies for capture and storage of CO{sub 2} in the Southwest Region. We are identifying potential gaps in all aspects of potential sequestration deployment issues.

  15. Carbon dioxide sensor

    DOE Patents [OSTI]

    Dutta, Prabir K. (Worthington, OH); Lee, Inhee (Columbus, OH); Akbar, Sheikh A. (Hilliard, OH)

    2011-11-15

    The present invention generally relates to carbon dioxide (CO.sub.2) sensors. In one embodiment, the present invention relates to a carbon dioxide (CO.sub.2) sensor that incorporates lithium phosphate (Li.sub.3PO.sub.4) as an electrolyte and sensing electrode comprising a combination of lithium carbonate (Li.sub.2CO.sub.3) and barium carbonate (BaCO.sub.3). In another embodiment, the present invention relates to a carbon dioxide (CO.sub.2) sensor has a reduced sensitivity to humidity due to a sensing electrode with a layered structure of lithium carbonate and barium carbonate. In still another embodiment, the present invention relates to a method of producing carbon dioxide (CO.sub.2) sensors having lithium phosphate (Li.sub.3PO.sub.4) as an electrolyte and sensing electrode comprising a combination of lithium carbonate (Li.sub.2CO.sub.3) and barium carbonate (BaCO.sub.3).

  16. Increasing subterranean mobilization of organic contaminants and petroleum by aqueous thermal oxidation

    DOE Patents [OSTI]

    Leif, Roald N. (San Francisco, CA); Knauss, Kevin G. (Livermore, CA); Newmark, Robin L. (Livermore, CA); Aines, Roger D. (Livermore, CA); Eaker, Craig (Alta Loma, CA)

    2002-01-01

    In situ hydrous pyrolysis/partial oxidation of organics at the site of the organics constrained in an subsurface reservoir produces surfactants that can form an oil/water emulsion that is effectively removed from an underground formation. The removal of the oil/water emulsions is particularly useful in several applications, e.g., soil contaminant remediation and enhanced oil recovery operations. A portion of the constrained organics react in heated reservoir water with injected steam containing dissolved oxygen gas at ambient reservoir conditions to produce such surfactants.

  17. CARBON EMISSIONS AND CARBON FIXING FROM AN ECONOMIC PERSPECTIVE

    E-Print Network [OSTI]

    Bateman, Ian J.

    constraint to these relationships, with the carbon dioxide emissions from fossil fuel consumption pressingCARBON EMISSIONS AND CARBON FIXING FROM AN ECONOMIC PERSPECTIVE by Dennis Anderson CSERGE GEC Working Paper 92-28 #12;CARBON EMISSIONS AND CARBON FIXING FROM AN ECONOMIC PERSPECTIVE by Dennis Anderson

  18. Carbon Code Requirements for voluntary carbon sequestration projects

    E-Print Network [OSTI]

    and individuals wishing to reduce their carbon footprint while also delivering a range of other environmentalWoodland Carbon Code Requirements for voluntary carbon sequestration projects ® Version 1.2 July of group schemes 8 2.6 Monitoring 9 2.7 Carbon statements and reporting 9 2.8 Woodland Carbon Code

  19. Carbon RRLs Carbon RRLs towards Ultra-compact HII Regions

    E-Print Network [OSTI]

    Balser, Dana S.

    Carbon RRLs Carbon RRLs towards Ultra-compact HII Regions Dana S. Balser D. Anish Roshi (Raman (Agnes Scott College) #12;Carbon RRLs Carbon Radio Recombination Lines (RRLs) NGC 2024 (Orion B) IC 1795 (W3) Palmer et al. (1967) #12;Carbon RRLs Photodissociation Regions (PDRs) Hollenbach & Tielens (1997

  20. Carbon Sequestration via Mineral Carbonation: Overview and Assessment

    E-Print Network [OSTI]

    1 Carbon Sequestration via Mineral Carbonation: Overview and Assessment 14 March 2002 Howard Herzog overview and assessment of carbon sequestration by mineral carbonation (referred to as "mineral sequestration R&D. The first is that carbonates have a lower energy state than CO2. Therefore, at least