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


1

Nitrate accumulation in soils and in plant parts of sorghum and oats as influenced by sources and rates of nitrogen fertilizers  

E-Print Network [OSTI]

and Accumulation in the Soil Profile Residual soil NO atter removal by the first crop Residual soil NO after removal by the second crop Residual soil NO after. 15 years in Coastal bermudagrass plo s 21 2 J. 21 41 41 46 50 DI, CUSSION Nitrate... in hydroxylamine reductase. Wright and Trautman (65) and Nightingale (39) have indicated that deficiencies or imbalance of other nutrients such as K, S, and Fe may cause NO build-up. 3 According to Benne (4), injury of the pl. ant tissues resulted in a drastic...

Costa, Cassimiro Vaz

1970-01-01T23:59:59.000Z

2

MICHIGAN'S SOIL NITRATE TEST FOR CORN MSU SOIL AND PLANT NUTRIENT LAB  

E-Print Network [OSTI]

MICHIGAN'S SOIL NITRATE TEST FOR CORN MSU SOIL AND PLANT NUTRIENT LAB Michigan State University Extension Crop and Soil Sciences Department Michigan State University WHY TEST SOIL FOR NITRATES Nitrate testing of soil is an excellent and inexpensive way of evaluating the available nitrogen (N) status

Isaacs, Rufus

3

Soil Tillage Influences on Soil Mineral Nitrogen and Nitrate Leaching in  

E-Print Network [OSTI]

Soil Tillage Influences on Soil Mineral Nitrogen and Nitrate Leaching in Swedish Arable Soils Åsa Myrbeck Faculty of Natural Resources and Agricultural Sciences Department of Soil and Environment Uppsala field experiment, Paper III. (photo: J. Arvidsson) #12;Soil Tillage Influences on Soil Mineral Nitrogen

4

The Effect of Time and Rate of Application of Nitrate of Soda on the Yield of Cotton.  

E-Print Network [OSTI]

TEXAS AGRICULTURAL EXPERIHENT STATIDJ A. R. CONNER, DIRECTOR COLLEGE STATION, BRAZOS COUNTY. TEXAS BULLETIN NO. 490 MARCH, 1934 .--' --7 , The Effect of Time and Rate of Application of Nitrate of Soda on the Yield of Cotton - AGRICULTURAL... of nitrate of soda on yield, length and percentage of lint, size of boll, shedding, and other characters of the cotton plant on the sandy soils of eastern Texas, as a basis for developing a more intelligent and profitable fertilizer practice for cotton...

Reynolds, E. B. (Elbert Brunner); Langley, B. C. (Bryon Caldwell); Johnson, P. R. (Paul Rufus)

1934-01-01T23:59:59.000Z

5

Potential dentrification rates of Texas soils  

E-Print Network [OSTI]

of depleting soil nitrogen by volatilization has been known for many years. It is the reduction of nitrate (NO ) or nitrite (N02 ) forms of nitrogen to gases. The principal deni . rifica. tion products are nitrogen (N2) and nitrous oxide (N20). The losses... gases evolved from Texas soils and relate it to soil organic mat*er content. Hopefully *he results of the study will be useful in increasing the efficiency of fertilizer usage in Texas and at the same time provide some of the insight needed for main...

Hsu, Shu-Chun Dolores

1975-01-01T23:59:59.000Z

6

Effect of Phosphate, Fluoride, and Nitrate on Gibbsite Dissolution Rate and Solubility  

SciTech Connect (OSTI)

Laboratory tests have been completed with simulated tank waste samples to investigate the effects of phosphate, fluoride, and nitrate on the dissolution rate and equilibrium solubility of gibbsite in sodium hydroxide solution at 22 and 40{degrees}C. Results are compared to relevant literature data and to computer model predictions. The presence of sodium nitrate (3 M) caused a reduction in the rate of gibbsite dissolution in NaOH, but a modest increase in the equilibrium solubility of aluminum. The increase in solubility was not as large, though, as the increase predicted by the computer model. The presence of phosphate, either as sodium phosphate or sodium fluoride phosphate, had a negligible effect on the rate of gibbsite dissolution, but caused a slight increase in aluminum solubility. The magnitude of the increased solubility, relative to the increase caused by sodium nitrate, suggests that the increase is due to ionic strength (or water activity) effects, rather than being associated with the specific ion involved. The computer model predicted that phosphate would cause a slight decrease in aluminum solubility, suggesting some Al-PO4 interaction. No evidence was found of such an interaction.

Herting, Daniel L. [Washington River Protection Solutions LLC (United States)

2014-01-29T23:59:59.000Z

7

Micro- and Mini-nitrate Sensors for Monitoring of Soils, Groundwater and Aquatic Systems  

E-Print Network [OSTI]

Nitrate Mini-Sensor with PVC membrane containing liquidmin) Mini-sensors with PVC maintain their sensitivity duringfabricated mini- sensors with PVC membranes showed better

2009-01-01T23:59:59.000Z

8

Effect of nitrogen source, rate and time of application on soil nitrogen status and on the characteristics of the plant  

E-Print Network [OSTI]

. They attributed this partly to the rapid hydrolysis of urea to ammoni- um which was then exchangeably sorbed by the soil. Studies by Black (5) indicated more rapid loss of nitrate from coarse than fine textured soils. Research by Greaves et al. (15) indicated... source on the subsoil ammoni- um content on May 16, The influence of nitrogen source, rate and time of application on cotton plant growth. The dry weight of the entire plant on May 30 and the dry weight of the entire plant together...

Sadik, Mohamed Kamal

1962-01-01T23:59:59.000Z

9

Accumulation and replacement of exchangeable sodium in soils of Southeast Texas under turfgrass and its effect on soil infiltration rate  

E-Print Network [OSTI]

in soils of this area. This study assessed the degree of Na accumulation on cation exchange sites as affected by gypsum treatments in soils that support turfgrass (bermudagrass) and the response of soil infiltration rate to different rates of gypsum...

Aydemir, Salih

2012-06-07T23:59:59.000Z

10

Bioremediation of oil-contaminated soil -- A rate model  

SciTech Connect (OSTI)

Three rate equations, a modified Monod equation and two mass transfer rate equations, were used to calculate the biodegradation rate, oxygen transfer rate and oil transfer rate during a bioremediation process of oil-contaminated soil. Based on experimental rate constants, these three rates were calculated and compared. It was found the bioremediation rate of oil-contaminated soil could be controlled by the mass transfer process of oil into aqueous solution (0.12 mg BOD/(1-h)). When the oil transfer rate is enhanced by at least 10 times, the oxygen transfer process (0.1--1.0 mg BOD/(1-h)) becomes the rate-controlling step. For most of the cases, the biodegradation of oil in aqueous solution is not the limiting step unless the microbial population in the aqueous solution is less than 100 mg VSS/1.

Li, K.Y.; Zhang, Y.; Xu, T. [Lamar Univ., Beaumont, TX (United States). Chemical Engineering Dept.] [Lamar Univ., Beaumont, TX (United States). Chemical Engineering Dept.

1995-12-31T23:59:59.000Z

11

Rate controlling model for bioremediation of oil contaminated soil  

SciTech Connect (OSTI)

A mathematical model of bio-remediation of hydrocarbons in a soil matrix has been developed to predict the rate controlling step and the remediation rate during the bioremediation of a contaminated soil. The model is based on mass transfer of oxygen and oil into the aqueous solution in the soil matrix and the biodegradation of the hydrocarbons in the aqueous solution. Monod's equation was used to describe the biodegradation rate in aqueous solution while the mass transfer equations were used to describe the mass transfer rates of oxygen and oil in the soil matrix. Results from model calculations indicate that the bio-remediation rate increases and approaches a limiting value when one of the rates becomes controlling. When the parameters of the site soil samples are measured and the solubilities of oxygen and oil in aqueous solution are obtained, the bioremediation rate can be predicted by this model. The rate controlling step of the bioremediation site may be identified quickly and steps to improve the bioremediation rate can be recommended. 8 refs., 7 figs.

Li, K.Y.; Annamali, S.N.; Hopper, J.R. (Lamar Univ., Beaumont, TX (United States))

1993-11-01T23:59:59.000Z

12

Soil Nitrogen Mineralization Potential for Improved Fertilizer Recommendations and Decreased Nitrate Contamination of Groundwater  

E-Print Network [OSTI]

In order to prevent overfertilization, which could lead to groundwater contamination, rapid and accurate soil testing procedures are needed to evaluate agricultural surface soils for their potential to mineralize C and N. Our objectives were...

Franzluebbers, Alan; Haney, Richard; Hons, Frank

13

Remediation of brine-contaminated soil using calcium nitrate, gypsum, and straw.  

E-Print Network [OSTI]

??Salt-affected soils from point source brine contamination are common in the active oil field in SE Saskatchewan. A remediation process that included dewatering by sub-surface… (more)

Nielsen, Jennifer I.

2013-01-01T23:59:59.000Z

14

Nitrate reduction  

DOE Patents [OSTI]

Nitrates are reduced to nitrogen gas by contacting the nitrates with a metal to reduce the nitrates to nitrites which are then contacted with an amide to produce nitrogen and carbon dioxide or acid anions which can be released to the atmosphere. Minor amounts of metal catalysts can be useful in the reduction of the nitrates to nitrites. Metal salts which are formed can be treated electrochemically to recover the metals.

Dziewinski, Jacek J. (Los Alamos, NM); Marczak, Stanislaw (Los Alamos, NM)

2000-01-01T23:59:59.000Z

15

Flow Rate Dependence of Soil Hydraulic Characteristics D. Wildenschild,* J. W. Hopmans, J. Simunek  

E-Print Network [OSTI]

Flow Rate Dependence of Soil Hydraulic Characteristics D. Wildenschild,* J. W. Hopmans, J. Simunek that some of the pores in theanalyzed using both steady state and transient flow analysis. One before their air-entry pres- loamy soil to evaluate the influence of flow rate on the calculated sure

Wildenschild, Dorthe

16

Effects of soil water repellency on infiltration rate and flow instability  

E-Print Network [OSTI]

. They are difficult to manage and pose negative effects on agricultural productivity and environmental sustain the contaminant transport to ground water. The purpose of this paper is to quantify the effects of soil waterEffects of soil water repellency on infiltration rate and flow instability Z. Wanga,*, Q.J. Wua,1

Wang, Zhi "Luke"

17

The influence of nitrogen rate and source on plant and soil properties  

E-Print Network [OSTI]

. Anhydrous ammonia caused the lea s t a lteration of pH in the su r face , but it caused the greatest acid ity in the subso i l . The lev e ls of nitrates in the so il w ere exp re s sed by quadratic equa? tions with co rre la t ion coe ff ic... , and and are the annual rate of nitrogen in pounds p er a c r e app lied as ammonium nitrate and anhydrous ammonia, r e sp e c t iv e ly . P red ic ted maximum y ields com pared favorab ly with the actual m aximum y ie lds o f 1 9 , 9 9 0 and 15, 850 pounds...

Fisher, Flake Leroy

1959-01-01T23:59:59.000Z

18

The effect of water application rate on the formation of a soil crust  

E-Print Network [OSTI]

THE EFFECT OF WATER APPLICATION RATE ON THE FOR11ATION OF A SOIL CRUST A Thesis by FAUSTO DANIEL BOGRAN CARCA1'10 Subni tted to the Graduate College of Texas A&M University in partial fulfillnent of the requlrenents for the degree of MASTER... OF SCIENCE May 1985 Major Subject: Agricultural Engineering THE EFFECT OF WATER APPLICATION RATE ON THE FORMATION OF A SOIl. CRUST A Thesi s by FAUSTO DANIEL BOGRAN CARCAMO Approved as to style and content by: ars a . McFar an (Chairman...

Bogran Carcamo, Fausto Daniel

1985-01-01T23:59:59.000Z

19

The effect of sulfur, magnesium, and various rates of potassium on forage production in some sandy soils of East Texas  

E-Print Network [OSTI]

THE EFFECT OF SULFUR, MAGNESIUM, AND VARIOUS RATES OF POTASSIUM ON FORAGE PRODUCTION IN SOME SANDy SOILS OF EAST TEXAS A Thesis by DENNIS PAUL LANDUA Submitted to the Graduate Collccje of Texas AFM Unive, sity in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE Ma 1969 Major Subject Soil Chemistr THE EFFECT OF SULFUR, MAGNESIUM, AND VARIOUS RATES OF POTASSIUM ON FORAGE PRODUCTION IN SOME SANDY SOILS OF EAST TEXAS A Thesis by DENNIS PAUL LANDUA Approved...

Landua, Dennis Paul

2012-06-07T23:59:59.000Z

20

Measurement of biodegradation rate constants of a water extract from petroleum-contaminated soil  

SciTech Connect (OSTI)

The study of biodegradation rate constants of petroleum products in water extract from contaminated soil presents an important component in the evaluation of bioremediation process. In this study, soil samples were gathered from an industrial site which was used for maintenance and storage of heavy equipment used in the oil and gas exploration and production industry. The petroleum contaminants were extracted from the soil using distilled water. This water extract was used as the substrate to acclimate a microbial community and also for the biological kinetic studies. Kinetic studies were carried out in batch reactors, and the biodegradation rates were monitored by a computer-controlled respirometer. The BOD data were analyzed by using the Monod equation. Experimental results give the average value of the maximum rate constant as 0.038 mg BOD/(mg VSS hr) and the average value of the substrate concentration of half rate as 746 mg BOD/l. A GC/MS analysis on the sample of the test solutions before and after 5 days of biological oxidation indicates that the hydrocarbons initially present in the solution were degraded.

Li, K.Y.; Kane, A.J.; Wang, J.J.; Cawley, W.A. (Lamar Univ., Beaumont, TX (United States). Chemical Engineering Dept.)

1993-01-01T23:59:59.000Z

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


21

The effect of organic soil amendments and nitrogen rate on field establishment of rabbiteye blueberries (Vaccinium ashei Reade.)  

E-Print Network [OSTI]

is usually a result of inadequate nitrogen (46). In the case of blueberries any increase in soil acidity is usually beneficial (2). Several studies have been conducted on the use of aged or composted sawdust as a soil amendment to compensate for the nitro...THE EFFECT OF ORGANIC SOIL AMENDMENTS AND NITROGEN RATE ON FIELD ESTABLISHMENT OF RABBITEYE BLUEBERRIES (VACCINIUM ASHEI READE. ) A Thesis by ELIZABETH CAROL WELLBORN Submitted to the Graduate College of Texas A&M University in partial...

Wellborn, Elizabeth Carol

1982-01-01T23:59:59.000Z

22

Project EARTH-12-PPS1: Weathering Rates in the Critical Zone: Soil Erosion, River Chemistry and Climate  

E-Print Network [OSTI]

Project EARTH-12-PPS1: Weathering Rates in the Critical Zone: Soil Erosion, River Chemistry., Assessing the role of climate on uranium and lithium isotope behaviour in rivers draining a basaltic terrain

Henderson, Gideon

23

A study of the effects of rate and frequency of loading on the stress-strain characteristics of granular soils  

E-Print Network [OSTI]

A STUDY OF THE EFFECTS OF RATE AND FREQUENCY OF LOADING ON THE STRESS-STRAIN CHARACTERISTICS OF GRANULAR SOILS A Thesis By James Clyde Armstrong Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1962 Major Subject: Civil Engineering A STUDY OF THE EFFECTS OF RATE AND FREQUENCY OF LOADING ON THE STRESS-STRAIN CHARACTERISTICS OF GRANULAR SOILS A Thesis By James Clyde...

Armstrong, James Clyde

1962-01-01T23:59:59.000Z

24

Temperature effects on decomposition rates of soil organic matter with differing proportions of labile and  

E-Print Network [OSTI]

favorable energy source. Labile soil organic matter is sugar, starch, and carbohydrates. An alternative energy source is recalcitrant carbon, which is harder to decompose soil organic matter such as lignin energy source (Nabu, 2009). With increasing global temperatures, it is important to understand how soil

Vallino, Joseph J.

25

Rice (Oryza sativa L.) response to clomazone as influenced by rate, soil type, and planting date  

E-Print Network [OSTI]

to ACSS, TASS, and Kd. TASS was significantly different in all soils at the 1% level of significance. The order of increasing TASS for the soils studied was Morey Edna Nada Crowley which correlated well with soil characteristics. Two field experiments...

O'Barr, John Houston

2006-08-16T23:59:59.000Z

26

The effects of calcitic and dolomitic limestone rates and particle sizes on soil chemical changes, plant nutrient concentration, and yields of corn and Coastal bermudagrass on two acid Texas soils  

E-Print Network [OSTI]

soil pH and in decreasing soil acidity with depth under heavy applications of residual acid forming N fertilizer, even after a seven year reaction period. Meyer and Volk (38) reported that calcitic limestone was slightly more effective than...THE EFFECTS OF CALCITIC AND DOLOMITIC LIMESTO11E RATES AND PARTICLE SIZES ON SOIL CHEMICAL CHANGES, PLANT NUTRIE. "1T CONCENTRATION, AND YIELDS OF CORN AND COASTAL BERMUDAGPXSS ON TWO ACID TEXAS SOILS A Thesis by VINCENT ANDREW HABY Submitted...

Haby, Vincent A

1969-01-01T23:59:59.000Z

27

Thermochemical nitrate destruction  

DOE Patents [OSTI]

A method is disclosed for denitrification of nitrates and nitrates present in aqueous waste streams. The method comprises the steps of (1) identifying the concentration nitrates and nitrites present in a waste stream, (2) causing formate to be present in the waste stream, (3) heating the mixture to a predetermined reaction temperature from about 200.degree. C. to about 600.degree. C., and (4) holding the mixture and accumulating products at heated and pressurized conditions for a residence time, thereby resulting in nitrogen and carbon dioxide gas, and hydroxides, and reducing the level of nitrates and nitrites to below drinking water standards.

Cox, John L. (Richland, WA); Hallen, Richard T. (Richland, WA); Lilga, Michael A. (Richland, WA)

1992-01-01T23:59:59.000Z

28

REGULAR ARTICLE Soil nitrogen cycling rates in low arctic shrub tundra  

E-Print Network [OSTI]

of the soil microbial community in both ecosystems indicat- ed similar fungal dominance (epifluorescence landscape. Keywords 15 Nitrogen . Gross N mineralization . Arctic tundra . Litter. Soil microbial community). For example, remote sensing studies have characterized an increase in peak-season biomass across the Arctic

Grogan, Paul

29

Mine waste contamination limits soil respiration rates: a case study using quantile regression  

E-Print Network [OSTI]

, the toxicity of heavy metals depends on soil acidity and organic matter because these factors strongly an environmental gradient. We quantified in situ soil respiration, pH, and heavy metal concentrations across a mine was limited with respect to both heavy metals and pH, and that both increased metals and increased acidity

Rilli, Matthias C.

30

Thermochemical nitrate destruction  

DOE Patents [OSTI]

A method is disclosed for denitrification of nitrates and nitrites present in aqueous waste streams. The method comprises the steps of (1) identifying the concentration nitrates and nitrites present in a waste stream, (2) causing formate to be present in the waste stream, (3) heating the mixture to a predetermined reaction temperature from about 200 C to about 600 C, and (4) holding the mixture and accumulating products at heated and pressurized conditions for a residence time, thereby resulting in nitrogen and carbon dioxide gas, and hydroxides, and reducing the level of nitrates and nitrites to below drinking water standards.

Cox, J.L.; Hallen, R.T.; Lilga, M.A.

1992-06-02T23:59:59.000Z

31

Drinking Water Problems: Nitrates  

E-Print Network [OSTI]

. 7). Nitrate ions are drawn through the membrane pores with elec- trical currents. The nitrate is pulled from the water into a brine waste stream. Ni trate-contaminated water Treated water Nitrate Chloride or hydroxide Exchange resin Figure 6. Ion... and Extension Agricultural Engineer, Texas Cooperative Extension, The Texas A&M University System B-6184 3-08 ' the safe levels of chemicals for U.S. drinking water. The EPA conducts research to determine the level of a contaminant in drinking water...

Dozier, Monty; Melton, Rebecca; Hare, Michael; Hopkins, Janie; Lesikar, Bruce J.

2008-03-28T23:59:59.000Z

32

Aluminum nitrate recrystallization and recovery from liquid extraction raffinates  

SciTech Connect (OSTI)

The solid sludges resulting form biodenitrification of discarded aluminum nitrate are the largest Y-12 Plant process solid waste. Aluminum nitrate feedstocks also represent a major plant materials cost. The chemical constraints on aluminum nitrate recycle were investigated to determine the feasibility of increasing recycle while maintaining acceptable aluminum nitrate purity. Reported phase behavior of analogous systems, together with bench research, indicated that it would be possible to raise the recycle rate from 35% to between 70 and 90% by successive concentration and recrystallization of the mother liquor. A full scale pilot test successfully confirmed the ability to obtain 70% recycle in existing process equipment.

Griffith, W.L.; Compere, A.L.; Googin, J.M.; Huxtable, W.P.

1991-09-01T23:59:59.000Z

33

Laboratory evaluation of the constant rate of strain and constant head techniques for measurement of the hydraulic conductivity of fine grained soils  

E-Print Network [OSTI]

This thesis evaluates the constant rate of strain and constant head techniques for measurement of the hydraulic conductivity of fine grained soils. A laboratory program compares hydraulic conductivity measurements made ...

Adams, Amy Lynn

2011-01-01T23:59:59.000Z

34

The role of reaction affinity and secondary minerals in regulating chemical weathering rates at the Santa Cruz Soil Chronosequence, California  

SciTech Connect (OSTI)

In order to explore the reasons for the apparent discrepancy between laboratory and field weathering rates and to determine the extent to which weathering rates are controlled by the approach to thermodynamic equilibrium, secondary mineral precipitation and flow rates, a multicomponent reactive transport model (CrunchFlow) was used to interpret soil profile development and mineral precipitation and dissolution rates at the 226 ka marine terrace chronosequence near Santa Cruz, CA. Aqueous compositions, fluid chemistry, transport, and mineral abundances are well characterized (White et al., 2008, GCA) and were used to constrain the reaction rates for the weathering and precipitating minerals in the reactive transport modeling. When primary mineral weathering rates are calculated with either of two experimentally determined rate constants, the nonlinear, parallel rate law formulation of Hellmann and Tisser and [2006] or the aluminum inhibition model proposed by Oelkers et al. [1994], modeling results are consistent with field-scale observations when independently constrained clay precipitation rates are accounted for. Experimental and field rates, therefore, can be reconciled at the Santa Cruz site. Observed maximum clay abundances in the argillic horizons occur at the depth and time where the reaction fronts of the primary minerals overlap. The modeling indicates that the argillic horizon at Santa Cruz can be explained almost entirely by weathering of primary minerals and in situ clay precipitation accompanied by undersaturation of kaolinite at the top of the profile. The rate constant for kaolinite precipitation was also determined based on model simulations of mineral abundances and dissolved Al, SiO{sub 2}(aq) and pH in pore waters. Changes in the rate of kaolinite precipitation or the flow rate do not affect the gradient of the primary mineral weathering profiles, but instead control the rate of propagation of the primary mineral weathering fronts and thus total mass removed from the weathering profile. Our analysis suggests that secondary clay precipitation is as important as aqueous transport in governing the amount of dissolution that occurs within a profile because clay minerals exert a strong control over the reaction affinity of the dissolving primary minerals. The modeling also indicates that the weathering advance rate and the total mass of mineral dissolved is controlled by the thermodynamic saturation of the primary dissolving phases plagioclase and K-feldspar, as is evident from the difference in propagation rates of the reaction fronts for the two minerals despite their very similar kinetic rate laws.

Maher, K.; Steefel, C. I.; White, A.F.; Stonestrom, D.A.

2009-02-25T23:59:59.000Z

35

Effects of soil treatments supplemented with two rates of magnesium sulfate on the availability of soil nutrients and on the yield and chemical composition of coastal Bermuda grass  

E-Print Network [OSTI]

Wean PPM of P in Soil Samples Collected in 1949 from Coast, al Bermuda Grass Plots Receiving Qifferent Rates and Combinations of N, F205, and MgS04. 7H20 g Treatments P N0 P0 1 Mean P0 1 Pl Mean N2 p$ Mean M80 1. 3 (8) jZ' 3. 4 2. 3 (16...) Nagnesium (Y&g) N xP N xNg PxNg Nxpxlig Replications 95 1 1 1 1 2 2 1 2 4& 857. 64. ="-" 9, 702. 2 5'-'? 13. 02 10. 67 14 & 113. 50?' " 319. 44 1, 435. 03 3. 38 964. 72 103. 68 8 00 17. 78 . 02 , 02 25, 87 . 58 2. 63 . 01 1. 77...

Evatt, Nathan S

2012-06-07T23:59:59.000Z

36

Purification of alkali metal nitrates  

DOE Patents [OSTI]

A process is disclosed for removing heavy metal contaminants from impure alkali metal nitrates containing them. The process comprises mixing the impure nitrates with sufficient water to form a concentrated aqueous solution of the impure nitrates, adjusting the pH of the resulting solution to within the range of between about 2 and about 7, adding sufficient reducing agent to react with heavy metal contaminants within said solution, adjusting the pH of the solution containing reducing agent to effect precipitation of heavy metal impurities and separating the solid impurities from the resulting purified aqueous solution of alkali metal nitrates. The resulting purified solution of alkali metal nitrates may be heated to evaporate water therefrom to produce purified molten alkali metal nitrate suitable for use as a heat transfer medium. If desired, the purified molten form may be granulated and cooled to form discrete solid particles of alkali metal nitrates.

Fiorucci, Louis C. (Hamden, CT); Gregory, Kevin M. (Woodridge, IL)

1985-05-14T23:59:59.000Z

37

Immobilization of sodium nitrate waste with polymers: Topical report  

SciTech Connect (OSTI)

This report describes the development of solidification systems for sodium nitrate waste. Sodium nitrate waste was solidified in the polymers polyethylene, polyester-styrene (PES), and water-extendible polyester-styrene (WEP). Evaluations were made of the properties of waste forms containing various amounts of sodium nitrate by leaching immersion in water, measuring compressive strengths and by the EPA Extraction Procedure. Results of the leaching test are presented as cumulative fraction leached (CFL), incremental leaching rate, and average leaching indices (LI). For waste forms containing 30 to 70 wt% sodium nitrate, the CFL ranged from 9.0 x 10/sup -3/ to 7.3 x 10/sup -1/ and the LI from 11 to 7.8. After ninety days immersion in water, the compressive strengths ranged from 720 psi to 2550 psi. The nitrate releases from these samples using the EPA Extraction Procedure were below 500 ppM. The nitrate releases from PES waste forms were similar to those from polyethylene waste forms at the same waste loadings. The compressive yield strengths, measured after ninety-day immersion in water, ranged between 2070 and 7710 psi. In the case of WEP waste forms, only 30 wt% loaded samples passed the immersion test. 23 refs., 24 figs., 12 tabs.

Franz, E.M.; Heiser, J.H. III; Colombo, P.

1987-04-01T23:59:59.000Z

38

Nitrate and Prussic Acid Poisoning  

E-Print Network [OSTI]

Nitrate and prussic acid poisoning in cattle are noninfectious conditions that can kill livestock. This publication explains the causes and symptoms of these conditions as well as preventive measures and sampling and testing steps....

Stichler, Charles; Reagor, John C.

2001-09-05T23:59:59.000Z

39

Biological Oxidation of Fe(II) in Reduced Nontronite Coupled with Nitrate Reduction by Pseudogulbenkiania sp. Strain 2002  

SciTech Connect (OSTI)

Nitrate contamination in soils, sediments, and water bodies is a significant issue. Although much is known about nitrate degradation in these environments, especially via microbial pathways, a complete understanding of all degradation processes, especially in clay mineral-rich soils, is still lacking. The objective of this study was to study the potential of removing nitrate contaminant using structural Fe(II) in clay mineral nontronite. Specifically, the coupled processes of microbial oxidation of Fe(II) in microbially reduced nontronite (NAu-2) and nitrate reduction by Pseudogulbenkiania species strain 2002 was investigated. Bio-oxidation experiments were conducted in bicarbonate-buffered medium under both growth and nongrowth conditions. The extents of Fe(II) oxidation and nitrate reduction were measured by wet chemical methods. X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM), and 57Fe-Mössbauer spectroscopy were used to observe mineralogical changes associated with Fe(III) reduction and Fe(II) oxidation in nontronite. The bio-oxidation extent under growth and nongrowth conditions reached 93% and 57%, respectively. Over the same time period, nitrate was completely reduced under both conditions to nitrogen gas (N2), via an intermediate product nitrite. Magnetite was a mineral product of nitrate-dependent Fe(II) oxidation, as evidenced by XRD data and TEM diffraction patterns. The results of this study highlight the importance of iron-bearing clay minerals in the global nitrogen cycle with potential applications in nitrate removal in soils.

Zhao, Linduo; Dong, Hailiang; Kukkadapu, Ravi K.; Agrawal, A.; Liu, Deng; Zhang, Jing; Edelmann, Richard E.

2013-10-15T23:59:59.000Z

40

Occurrence of Nitrites in Soils.  

E-Print Network [OSTI]

capacity for producing nitrates may form large amounts of nitrites. Nitrites may persist in the soil or in soil extracts for several weeks. Magnesium carbonate and calcium car- bonate may favor the formation of nitrites. Water equivaIent to 50 per cent... ............................................. Method of work 5 Nitrites in soils without additions of nitrogenous materials ........ 6 Nitrification capacity as measured by nitric nitrogen alone. and by nitric and nitrous nitrogen combined ....................... 6...

Fraps, G. S. (George Stronach); Sterges, A. J.

1930-01-01T23:59:59.000Z

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


41

Process for reducing aqueous nitrate to ammonia  

DOE Patents [OSTI]

Powdered aluminum is added to a nitrate-containing alkaline, aqueous solution to reduce the nitrate and/or nitrite to ammonia and co-produce a sinterable ceramic product.

Mattus, Alfred J. (Oak Ridge, TN)

1993-01-01T23:59:59.000Z

42

A Novel Chemical Nitrate Destruction Process  

SciTech Connect (OSTI)

Nitrates represent one of the most significant pollutant discharged to the Baltic Sea by the Sliiamae hydrometallurgical plant. This article contains a brief overview of the existing nitrate destruction technologies followed by the description of a new process developed by the authors. The new chemical process for nitrate destruction is cost effective and simple to operate. It converts the nitrate to nitrogen gas which goes to the atmosphere.

Dziewinski, J.; Marczak, S.

1999-03-01T23:59:59.000Z

43

Application of municipal sludge (biosolids) for agricultural purposes and groundwater nitrate concentrations  

SciTech Connect (OSTI)

One of the more popular means of handling sewage sludge from municipalities is its application to agricultural lands. A variety of crops are grown with the expectation that plants will utilize the nitrogen. However, a complex scenario allows some of the nitrate to move below root depth and eventually to the water table at depths of up to 30 ft. The City of Raleigh, NC injects sewage sludge ( residuals'', biosolids'') into soils derived largely from the Rolesville Granite in an area of typical rolling Piedmont topography. A 1975 background study of part of the site demonstrated differences in groundwater quality between areas farmed over a period of years and areas dominated by second-growth pine and harwood forests. Groundwater quality data collected semiannually between 1982 and 1988 show gradual buildup of nitrate in some fields; in others groundwater quality apparently remains unaffected by nitrate from the sludge. Monitoring well placement may play a role in these differences. Minimum time from the sludge application to an increase in groundwater nitrate is from 9 to 12 months. An ongoing study of a 12-acre field which lay fallow for a number of years prior to sludge application in 1990 demonstrates that some nitrate does move downward fairly rapidly, its movement being recorded in both the saprolite and groundwater. Comparison of nitrate content of groundwater from monitoring wells at a nearby dairy farm shows that normal agricultural practices may also increase the nitrate content of the shallow groundwater.

Welby, C.W. (North Carolina State Univ., Raleigh, NC (United States). Dept. of Marine, Earth and Atmospheric Sciences)

1993-03-01T23:59:59.000Z

44

SOIL TEST INTERPRETATIONS RECOMMENDATIONS HANDBOOK  

E-Print Network [OSTI]

1 SOIL TEST INTERPRETATIONS AND RECOMMENDATIONS HANDBOOK Originally written 1983 By Daryl D..................................................20 SOIL ACIDITY AND LIMESTONE...............................................27 EXCHANGEABLE MAGNESIUM No. Page No. I. Nitrogen rate adjustments based upon soil texture, organic matter, and time of major

Noble, James S.

45

Assessment of the potential for ammonium nitrate formation and reaction in Tank 241-SY-101  

SciTech Connect (OSTI)

Two principal scenarios by which ammonium nitrate may be formed were considered: (a) precipitation of ammonium nitrate in the waste, and (b) ammonium nitrate formation via the gas phase reaction of ammonia and nitrogen dioxide. The first of these can be dismissed because ammonium ions, which are necessary for ammonium nitrate precipitation, can exist only in negligibly small concentrations in strongly alkaline solutions. Gas phase reactions between ammonia, nitrogen dioxide, and water vapor in the gas phase represent the most likely means by which ammonium nitrate aerosols could be formed in Tank 241-SY-101. Predicted ammonium nitrate formation rates are largely controlled by the concentration of nitrogen dioxide. This gas has not been detected among those gases vented from the wastes using Fourier Transform Infrared Spectrometry (FTIR) or mass spectrometry. While detection limits for nitrogen dioxide have not been established experimentally, the maximum concentration of nitrogen dioxide in the gas phase in Tank 241-SY-101 was estimated at 0.1 ppm based on calculations using the HITRAN data base and on FTIR spectra of gases vented from the wastes. At 50 C and with 100 ppm ammonia also present, less than one gram of ammonium nitrate per year is estimated to be formed in the tank. To date, ammonium nitrate has not been detected on HEPA filters in the ventilation system, so any quantity that has been formed in the tank must be quite small, in good agreement with rate calculations. The potential for runaway exothermic reactions involving ammonium nitrate in Tank 241-SY-101 is minimal. Dilution by non-reacting waste components, particularly water, would prevent hazardous exothermic reactions from occurring within the waste slurry, even if ammonium nitrate were present. 41 refs.

Pederson, L.R.; Bryan, S.A.

1994-08-01T23:59:59.000Z

46

Thermal decomposition of nitrated tributyl phosphate  

SciTech Connect (OSTI)

Extended contact between heated mixtures of tri-n-butyl phosphate (TBP) and aqueous solutions of nitric acid and/or heavy metal nitrate salts at elevated temperatures can lead to exothermic reactions of explosive violence. Most solvent extraction operations are conducted at ambient conditions without heating TBP and have been performed safely for decades, but several explosions involving TBP have occurred in the US, Canada, and the former Soviet Union. This investigation was undertaken to characterize the products of thermal decomposition of both single- and two-phase mixtures of TBP, nitric acid, and water under a variety of conditions. The data indicate that the extent of reaction and the rate of gaseous product formation are affected by the presence of Zr{sup 4+}, distillation compared with reflux conditions, temperature, water/HNO{sub 3} and HNO{sub 3}/TBP ratios, and whether the decomposition occurs under constant pressure or constant volume conditions. Higher reaction temperatures accelerate the rate of decomposition, but the extent of decomposition, as measured by the quantity of gaseous products, was greater at lower temperatures when the decomposition was performed under distillation conditions. Higher gas production occurs under reflux conditions, lower H{sub 2}O/HNO{sub 3} ratios, and when a separate water-HNO{sub 3} phase is initially present. The major gaseous products include N{sub 2}, CO, CO{sub 2}, NO, and N{sub 2}O. Measurable amounts of NO{sub 2} were not present in the final product mixture, although an orange color suggesting the presence of NO{sub 2} was observed in the early stages of decomposition. The major liquid products were dibutyl phosphoric acid, butyl nitrate, and water. Small amounts of C{sub 1}-C{sub 4} carboxylic acids were also present. Because of the small sample sizes that were employed and the isothermal conditions of the decomposition, runaway reactions were not observed. Some possible reaction pathways are considered.

Hou, Y.; Barefield, E.K.; Tedder, D.W.; Abdel-Khalik, S.I. [Georgia Inst. of Technology, Atlanta, GA (United States)

1996-03-01T23:59:59.000Z

47

STANDARDS CONTROLLING AIR EMISSIONS FOR THE SOIL DESICCATION PILOT TEST  

SciTech Connect (OSTI)

This air emissions document supports implementation of the Treatability Test Plan for Soil Desiccation as outlined in the Deep Vadose Zone Treatability Test Plan for the Hanford Central Plateau (DOE/RL-2007-56). Treatability testing supports evaluation of remedial technologies for technetium-99 (Tc-99) contamination in the vadose zone at sites such as the BC Cribs and Trenches. Soil desiccation has been selected as the first technology for testing because it has been recommended as a promising technology in previous Hanford Site technology evaluations and because testing of soil desiccation will provide useful information to enhance evaluation of other technologies, in particular gas-phase remediation technologies. A soil desiccation pilot test (SDPT) will evaluate the desiccation process (e.g., how the targeted interval is dried) and the long-term performance for mitigation of contaminant transport. The SDPT will dry out a moist zone contaminated by Tc-99 and nitrate that has been detected at Well 299-E13-62 (Borehole C5923). This air emissions document applies to the activities to be completed to conduct the SDPT in the 200-BC-1 operable unit located in the 200 East Area of the Hanford Site. Well 299-E13-62 is planned to be used as an injection well. This well is located between and approximately equidistant from cribs 216-B-16, 216-B-17, 216-B-18. and 216-B-19. Nitrogen gas will be pumped at approximately 300 ft{sup 3}/min into the 299-EI3-62 injection well, located approximately 12 m (39 ft) away from extraction well 299-EI3-65. The soil gas extraction rate will be approximately 150 ft{sup 3}/min. The SDPT will be conducted continuously over a period of approximately six months. The purpose of the test is to evaluate soil desiccation as a potential remedy for protecting groundwater. A conceptual depiction is provided in Figure 1. The soil desiccation process will physically dry, or evaporate, some of the water from the moist zone of interest. As such, it is expected that Tc-99 and nitrate will remain with the water residual that is not removed, or remain as a salt bound to the soil particles. In addition, the SDPT will be conducted at lower extraction velocities to preclude pore water entrainment and thus, the extracted air effluent should be free of the contaminant residual present in the targeted moist zone. However, to conservatively bound the planned activity for potential radionuclide air emissions, it is assumed, hypothetically, that the Tc-99 does not remain in the zone of interest, but that it instead travels with the evaporated moisture to the extraction well and to the test equipment at the land surface. Thus, a release potential would exist from the planned point source (powered exhaust) for Tc-99 in the extracted moist air. In this hypothetical bounding case there would also be a potential for very minor fugitive emissions to occur due to nitrogen injection into the soil. The maximum value for Tc-99, measured in the contaminated moist zone, is used in calculating the release potential described in Section 2.3. The desiccation mechanism will be evaporation. Nitrate is neither a criteria pollutant nor a toxic air pollutant. It would remain nitrate as a salt adhered to sand and silt grains or as nitrate dissolved in the pore water. Nitrogen, an inert gas, will be injected into the ground during the test. Tracer gasses will also be injected near the beginning, middle, and the end of the test. The tracer gasses are sulfur hexafluoride, trichlorofluoromethane, and difluoromethane.

BENECKE MW

2010-09-08T23:59:59.000Z

48

Relation of Soil Nitrogen, Nitrification and Ammonification to Pot Experiments.  

E-Print Network [OSTI]

............................................ 6 Relation of the Crops to the Total Nitrogen of the Soil ........... 7 Relation of the Different Crops ................................. 8 Relation of Surface Soil to Subsoil ............................. 13 Acid Soils Compared with Non-Acid... of Production of Nitrates to the Results of the Pot Ex- periments ................................................ 21 Extensive Work ............................................ 24 Relation of Nitric Nitrogen to Nitrogen Removed by First Crop .... 24...

Fraps, G. S. (George Stronach)

1921-01-01T23:59:59.000Z

49

A Field-Scale Assessment of Soil-Specific Seeding Rates to Optimize Yield Factors and Water Use in Cotton  

E-Print Network [OSTI]

al., 2006; Ge et al., 2008). Other precision agriculture technologies in cotton, such as variable rate seeding, fertilizer, pest management, and irrigation may have a positive impact on cotton production under a site-specific management plan... the potential to reduce inputs, but equipment costs make these technologies undesirable to producers that have working systems in place (Bronson et al., 2006; Seo et al., 2008). Implementation of these precision agriculture technologies in cotton, especially...

Stanislav, Scott Michael

2011-10-21T23:59:59.000Z

50

Nitrates and Prussic Acid in Forages  

E-Print Network [OSTI]

When nitrates and prussic acid accumulate in forage, the feed may not be safe for livestock consumption. Learn the symptoms of nitrate and prussic acid poisoning and which plants are most likely to pose a risk to livestock. Also learn sampling...

Provin, Tony; Pitt, John L.

2003-01-06T23:59:59.000Z

51

Atomic structure of nitrate-binding protein crucial for photosynthetic...  

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

structure of nitrate-binding protein crucial for photosynthetic productivity. Atomic structure of nitrate-binding protein crucial for photosynthetic productivity. Abstract:...

52

Report seeks solutions for nitrate in drinking water  

E-Print Network [OSTI]

Nitrate in California’s Drinking Water report http://Clark Report seeks solutions for nitrate in drinking waternitrate contamination of drinking water in high-risk areas

Editors, By

2012-01-01T23:59:59.000Z

53

Soil Quality Information Sheet Rangeland Soil Quality--Water Erosion  

E-Print Network [OSTI]

Soil Quality Information Sheet Rangeland Soil Quality--Water Erosion USDA, Natural Resources and removal of soil material by water. The process may be natural or accelerated by human activity. The rate of erosion may be very slow to very rapid, depending on the soil, the local landscape, and weather conditions

54

Thermal decomposition of nitrated tributyl phosphate  

SciTech Connect (OSTI)

Tri-n-butyl phosphate (TBP), nitric acid and water mixtures are subject to thermal decomposition. The gaseous and liquid decomposition product yields are highly path dependent. Higher temperatures accelerate decomposition rates, but may result in lower extent of reaction than comparable low temperature cases. Actual extent of reaction, and gaseous by-products generation, are affected by the presence of Zr(IV), condensate reflux back into the reaction vessel, the water/HNO{sub 3} and the HNO{sub 3}/TBP molar ratios, and whether the decomposition occurs at isobaric or constant volume conditions. Higher gaseous production results from condensate reflux, lower H{sub 2}O/HNO{sub 3} ratios, and with excess HNO{sub 3} and water present as a second liquid phase. Principal gaseous products include N{sub 2}, CO, CO{sub 2}, NO and N{sub 2}O. Measurable concentrations of NO{sub 2} were not observed, although gas coloration indicative of NO{sub 2} were obsessed during the beginning of decomposition measurements. Principal liquid products are dibutyl phosphoric acid and butyl nitrate. Air sparging of TBP solutions (e.g., thru transfers using air lift pumps) may increase the hazards of TBP decomposition reactions by lowering the H{sub 2}O/HNO{sub 3} molar ratios. Runaway reactions were not observed under the conditions of this study. Possible reaction mechanisms and pathways are discussed.

Hou, Y.; Barefield, E.K.; Tedder, D.W.; Abdel-Khalik, S.I. [Georgia Institute of Technology, Atlanta, GA (United States)

1995-12-31T23:59:59.000Z

55

Process for the preparation of an energetic nitrate ester  

DOE Patents [OSTI]

A process for the preparation of an energetic nitrate ester compound and related intermediates is provided.

Chavez, David E; Naud, Darren L; Hiskey, Michael A

2013-12-17T23:59:59.000Z

56

Synthesis of a new energetic nitrate ester  

SciTech Connect (OSTI)

Nitrate esters have been known as useful energetic materials since the discovery of nitroglycerin by Ascanio Sobrero in 1846. The development of methods to increase the safety and utility of nitroglycerin by Alfred Nobel led to the revolutionary improvement in the utility of nitroglycerin in explosive applications in the form of dynamite. Since then, many nitrate esters have been prepared and incorporated into military applications such as double-based propellants, detonators and as energetic plasticizers. Nitrate esters have also been shown to have vasodilatory effects in humans and thus have been studied and used for treatments of ailments such as angina. The mechanism of the biological response towards nitrate esters has been elucidated recently. Interestingly, many of the nitrate esters used for military purposes are liquids (ethylene glycol dinitrate, propylene glycol dinitrate, etc). Pentaerythritol tetranitrate (PETN) is one of the only solid nitrate esters, besides nitrocellulose, that is used in any application. Unfortunately, PETN melting point is above 100 {sup o}C, and thus must be pressed as a solid for detonator applications. A more practical material would be a melt-castable explosive, for potential simplification of manufacturing processes. Herein we describe the synthesis of a new energetic nitrate ester (1) that is a solid at ambient temperatures, has a melting point of 85-86 {sup o}C and has the highest density of any known nitrate ester composed only of carbon, hydrogen, nitrogen and oxygen. We also describe the chemical, thermal and sensitivity properties of 1 as well as some preliminary explosive performance data.

Chavez, David E [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

57

Nitrates and detinning in canned carrots  

E-Print Network [OSTI]

NITRATES AND DETINNING IN CANNED CARROTS A Thesis by Thomas Edward Florine Submitted to the Graduate College of the Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE January 1968 Major... Subject: Food Technology NITRATES AND DETINNING IN CANNED CARROTS A Thesis by Thomas Edward Florine Approved as to style and content by: / C-~ (Chairman of Cemi. tee) Head of Department Member) (Member) :-'i ~ (Member) (Member) (Member...

Florine, Thomas Edward

1968-01-01T23:59:59.000Z

58

The Production of Active Nitrogen in the Soil.  

E-Print Network [OSTI]

together are taken, the differences are much smaller. If oitrates are much more valuable to plants than ammonia, these differences are very important; but if there is little difference in the value of the two, soils do not vary greatly in their power... ordx. The nitrifying power of all the soils which were probably acid were low; the limed sodium nitrate soil had a much greater ability of converting cottonseed meal into nitrates than the others. We did no' study the production of ammonia...

Fraps, G. S. (George Stronach)

1908-01-01T23:59:59.000Z

59

Automated soil gas monitoring chamber  

DOE Patents [OSTI]

A chamber for trapping soil gases as they evolve from the soil without disturbance to the soil and to the natural microclimate within the chamber has been invented. The chamber opens between measurements and therefore does not alter the metabolic processes that influence soil gas efflux rates. A multiple chamber system provides for repetitive multi-point sampling, undisturbed metabolic soil processes between sampling, and an essentially airtight sampling chamber operating at ambient pressure.

Edwards, Nelson T.; Riggs, Jeffery S.

2003-07-29T23:59:59.000Z

60

Review of municipal sludge use as a soil amendment on disturbed lands  

SciTech Connect (OSTI)

The US Department of Energy is examining options of improving soil conditions at Hanford reclamation sites. One promising technology is the incorporation of municipal sewage sludge into the soil profile. This report reviews the potential benefits and adverse consequences of sludge use in land reclamation. Land reclamation comprises those activities instigated to return a mechanically disturbed site to some later successional state. Besides the introduction of suitable plant species to disturbed lands, reclamation generally requires measures to enhance long-term soil nutrient content, moisture retention or drainage, and mitigation of toxic effects from metals and pH. One of the more effective means of remediating adverse soil characteristics is the application of complex organic manures such as municipal sewage sludge. Sewage sludges contain complete macro- and micronutrients necessary to sustain plant growth. The application of sewage sludge may reestablish microbial activity in sterile soils. Physical properties, such as water-holding capacity and percentage water-stable aggregates, also improve with the addition of sewage sludge. Sludge applications may also increase the rate of degradation of some hydrocarbon pollutants in soils. Potential adverse impacts associated with the application of sewage sludge to land include negative public perception of human waste products; concerns regarding pathogen buildup and spread in the soils, plants, and water; entrance and accumulation of heavy metals in the food chain; salt accumulation in the soil and ground water; leaching of nitrates into ground water; and accumulation of other potentially toxic substances, such as boron and synthetic hydrocarbons, in the soil, plants, and food chain. 56 refs., 10 tabs.

Brandt, C.A.; Hendrickson, P.L.

1990-08-01T23:59:59.000Z

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


61

Surface Soil  

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

Surface Soil Surface Soil We compare local soil samples with samples collected from northern New Mexico locations that are beyond the range of potential influence from normal...

62

The effect of sources of nitrogen on nitrate formation and nitrogen uptake by cotton plants growing on Miller clay loam  

E-Print Network [OSTI]

that the temperature may affect the occurrence of nitrites. Same cultures incubated. at 24oC contained. much ni+rites snd little nitrates, while portions of the same cultures incubated at 3$oC contained nitrates but no nitrites. Cultures from sub-soil are more... criticism during the elaboration of the present work. Appreciation is extended. to Dx. H. E. Hampton, Chaixman of' the Hecognition is due tc Dx. V. M. Artecona and Nr. A. P. Cobra for committee, and. to Dr. A. G. Caldwell for help snd encouragement...

Marcos, Zilmar Ziller

1958-01-01T23:59:59.000Z

63

The influence of dose-rest cycles on the nitrate concentration of deep percolate below septic fields  

E-Print Network [OSTI]

in private water sup- plies in Morgan County, Missouri. J. Milk and Food Technology, 30: 224-225. 23. King, L. D. and H. D. Morris. 1972. Land disposal of liquid sewage sludge; the effect on soil nitrate. J. Environmental Quality, 1: 442-446. 34 24... septic- tank technology. J. Environmental Health, 3, 30: 250-262. 37 APPENDIX 0 ~O O I- CL IJ, I U O O O 20 16 12 8 4 20 I FEB. DOSE IO 20 ' 30 MAR. ~ OXYGEN NITRATE RESI 10 20 30 IO 20 30 10 20 APR . MAY JUNE DATE -120 100...

Allison, John Bryan

1976-01-01T23:59:59.000Z

64

The nitrate to ammonia and ceramic (NAC) process -- a newly developed low-temperature technology  

SciTech Connect (OSTI)

Bench-top feasibility studies with Hanford single-shell tank (SST) simulants, using a new low-temperature (50-60C) process for converting nitrate to ammonia and ceramic (NAC), showed that between 90 and 99% of the nitrate at Hanford can be readily converted to ammonia. Aluminum powders or shot can be used to convert alkaline, nitrate-based supernate to ammonia and an alumina-silica-based ceramic solid. The process may utilize already contaminated aluminum scrap metal from various DOE sites to effect the conversion. The final nitrate-free ceramic product can be calcined, pressed, and sintered like any other ceramic. Based on starting volumes of 6.2 and 3.1 M sodium nitrate solution (probable supernate concentrations resulting from salt-cake/sludge removal from Hanford SSTs), volume reductions as high as 70% are currently obtained, compared with an expected 40 to 50% volume increase if the Hanford supernate were grouted. Engineering data indicate that the process will be very economical. Data were used to cost a batch facility with a production rate of 1200 kilograms of nitrate per hour for processing all the Hanford SST waste over 20 years. Process cost analysis indicates that between $2.01 and 2.66 will be required to convert each kilogram of nitrate. These costs are one-third to one-half of the processing costs for electrolytic and thermal processes. The ceramic waste form offers other cost savings associated with a smaller volume of waste as well as eliminates other process steps such as grouting. Silica added to the reactor, based upon the total sodium in the waste, permits us to actually bind the sodium in a nepheline phase of the final ceramic structure as well as bind most metals and nonmetals in the ceramic.

Mattus, A.J.; Lee, D.D.

1993-06-01T23:59:59.000Z

65

Quantifying uncertainty in nitrate pollution from land application of sewage sludge  

SciTech Connect (OSTI)

Uncertainty associated with nitrate-nitrogen pollution of ground water from sludge applications was investigated. Three alternative planning models were proposed. The models estimate annual loads and concentrations of nitrate-nitrogen in percolation. Published data from four field studies that included aerobic and anaerobic sludge and surface- and soil-incorporated applications were used for model testing. Point and stochastic validation procedures were used. The models were generally conservative. For three data sets average relative errors were approximately +/- 25% for all three models. The fourth data set had average relative errors of 100-500%. Wilcoxon Signed Rank test results (at ..cap alpha.. = 5%) suggested point-model predictions and observations were drawn from similar distributions. Stochastic validation tests also suggested that observations were samples from distributions of predictions. The models were tested as uncalibrated approximations of nitrate percolation. All three appear sufficiently accurate for planning application systems. A planning procedure was developed which utilizes analytically approximated probability distributions of nitrate loads and concentrations. Distributions are specified with analytical moment expressions and a normal distribution function limited to be non-negative.

Mummert, M.C.

1987-01-01T23:59:59.000Z

66

DIVISION S-6--SOIL & WATER MANAGEMENT & CONSERVATION  

E-Print Network [OSTI]

DIVISION S-6--SOIL & WATER MANAGEMENT & CONSERVATION Soil Organic Carbon Sequestration Rates soil column within 20 yr following culti- Carbon sequestration rates, with a change from CT to NT, can in approximately 40 to and returning to the original land cover or other peren- 60 yr. Carbon sequestration rates

67

Perchlorate and nitrate in situ bioremediation of ground water  

SciTech Connect (OSTI)

Nitrate and perchlorate are growing worldwide problems as mobile anionic groundwater contaminants. Biological rduction of nitrate and perchlorate in groundwater is under development as a technology to address these problems.

Strietelmeier, E. A. (Elizabeth A.); Nuttall, H. Eric; Hatzinger, Paul; Goltz, Mark

2002-01-01T23:59:59.000Z

68

Denitration of High Nitrate Salts Using Reductants  

SciTech Connect (OSTI)

This report describes work conducted by Pacific Northwest National Laboratory (PNNL), in conjunction with Idaho National Engineering and Environmental Laboratory (INEEL), to remove nitrates in simulated low-activity waste (LAW). The major objective of this work was to provide data for identifying and demonstrating a technically viable and cost-effective approach to condition LAW for immobilization (grout).

HD Smith; EO Jones; AJ Schmidt; AH Zacher; MD Brown; MR Elmore; SR Gano

1999-05-03T23:59:59.000Z

69

3, 59195976, 2003 The nitrate aerosol  

E-Print Network [OSTI]

ACPD 3, 5919­5976, 2003 The nitrate aerosol field over Europe M. Schaap et al. Title Page Abstract of Utrecht, Institute of Marine and Atmospheric Science, PO Box 80005, 3508 TA, Utrecht, The Netherlands 2, The Netherlands 3 Netherlands Energy Research Foundation (ECN), PO Box 1, 1755 LE Petten, The Netherlands 4 Joint

Paris-Sud XI, Université de

70

NITRATE DESTRUCTION LITERATURE SURVEY AND EVALUATION CRITERIA  

SciTech Connect (OSTI)

This report satisfies the initial phase of Task WP-2.3.4 Alternative Sodium Recovery Technology, Subtask 1; Develop Near-Tank Nitrate/Nitrite Destruction Technology. Some of the more common anions in carbon steel waste tanks at SRS and Hanford Site are nitrate which is corrosive, and nitrite and hydroxide which are corrosion inhibitors. At present it is necessary to periodically add large quantities of 50 wt% caustic to waste tanks. There are three primary reasons for this addition. First, when the contents of salt tanks are dissolved, sodium hydroxide preferentially dissolves and is removed. During the dissolution process the concentration of free hydroxide in the tank liquid can decrease from 9 M to less than 0.2 M. As a result, roughly half way through the dissolution process large quantities of sodium hydroxide must be added to the tank to comply with requirements for corrosion control. Second, hydroxide is continuously consumed by reaction with carbon dioxide which occurs naturally in purge air used to prevent buildup of hydrogen gas inside the tanks. The hydrogen is generated by radiolysis of water. Third, increasing the concentration of hydroxide increases solubility of some aluminum compounds, which is desirable in processing waste. A process that converts nitrate and nitrite to hydroxide would reduce certain costs. (1) Less caustic would be purchased. (2) Some of the aluminum solid compounds in the waste tanks would become more soluble so less mass of solids would be sent to High Level Vitrification and therefore it would be not be necessary to make as much expensive high level vitrified product. (3) Less mass of sodium would be fed to Saltstone at SRS or Low Level Vitrification at Hanford Site so it would not be necessary to make as much low level product. (4) At SRS less nitrite and nitrate would be sent to Defense Waste Processing Facility (DWPF) so less formic acid would be consumed there and less hydrogen gas would be generated. This task involves literature survey of technologies to perform the nitrate to hydroxide conversion, selection of the most promising technologies, preparation of a flowsheet and design of a system. The most promising technologies are electrochemical reduction of nitrates and chemical reduction with hydrogen or ammonia. The primary reviewed technologies are listed and they aredescribed in more detail later in the report: (1) Electrochemical destruction; (2) Chemical reduction with agents such as ammonia, hydrazine or hydrogen; (3) Hydrothermal reduction process; and (4) Calcination. Only three of the technologies on the list have been demonstrated to generate usable amounts of caustic; electrochemical reduction and chemical reduction with ammonia, hydrazine or hydrogen and hydrothermal reduction. Chemical reduction with an organic reactant such as formic acid generates carbon dioxide which reacts with caustic and is thus counterproductive. Treatment of nitrate with aluminum or other active metals generates a solid product. High temperature calcination has the potential to generate sodium oxide which may be hydrated to sodium hydroxide, but this is unproven. The following criteria were developed to evaluate the most suitable option. The numbers in brackets after the criteria are relative weighting factors to account for importance: (1) Personnel exposure to radiation for installation, routine operation and maintenance; (2) Non-radioactive safety issues; (3) Whether the technology generates caustic and how many moles of caustic are generated per mole of nitrate plus nitrite decomposed; (4) Whether the technology can handle nitrate and nitrite at the concentrations encountered in waste; (5) Maturity of technology; (6) Estimated annual cost of operation (labor, depreciation, materials, utilities); (7) Capital cost; (8) Selectivity to nitrogen as decomposition product (other products are flammable and/or toxic); (9) Impact of introduced species; (10) Selectivity for destruction of nitrate vs. nitrite; and (11) Cost of deactivation and demolition. Each technology was given a score from one

Steimke, J.

2011-02-01T23:59:59.000Z

71

Extraction of nitric acid, uranyl nitrate, and bismuth nitrate from aqueous nitric acid solutions with CMPO  

SciTech Connect (OSTI)

DOE sponsored development of the transuranium extraction (TRUEX) process for removing actinides from radioactive wastes. The solvent is a mixture of CMPO and TBP. Since the extraction characteristics of CMPO are not as well understood as those of TBP, the extraction of nitric acid, uranyl nitrate, and bismuth nitrate with CMPO (dissolved in n-dodecane) were studied. Results indicate that CMPO extracts nitric acid with a 1:1 stoichiometry; equilibrium constant is 2. 660{plus_minus}0.092 at 25 C, and extraction enthalpy is -5. 46{plus_minus}0.46 kcal/mol. Slope analysis indicates that uranyl nitrate extracts with a mixed equilibria of 1:1 and 2:1 stoichiometries in nearly equal proportion. Equil. constant of the 2: 1 extraction was 1.213 {times} 10{sup 6}{plus_minus}3.56 {times} 10{sup 4} at 25 C; reaction enthalpy was -9.610{plus_minus}0.594 kcal/mol. Nitration complexation constant is 8.412{plus_minus}0.579, with an enthalpy of -10.72{plus_minus}1.87 kcal/mol. Bismuth nitrate also extracts with a mixed equilibria of (perhaps) 1:1 and 2:1 stoichiometries. A 2:1 extraction equilibrium and a nitrate complexation adequately model the data. Kinetics and enthalpies were also measured.

Spencer, B.B.

1995-08-01T23:59:59.000Z

72

Soils Soil Series  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBiSite CulturalDepartment ofat HomeAssurance: DOESoil0 Soils Soil

73

The effects of varied rates and ratios of fertilizer on forage yields and tillering of Austin wheat on Lufkin fine sandy loam and Miller clay soils  

E-Print Network [OSTI]

163 V9 136 5S 143 1Q ~ LQ Mf f erenee required for signifioanoe betveen sean treatments on c Iuaber of plots ( 27 ) 05 legal 31 31 ~ 01 level 41 + 57 e Treatseatt pounds pez' acre of Ht P205s azd X20c Rg e Oi 81 = 30' H2 60j I3 90$ Pp a Op Pl e... 4 92 3 13 tj 92 3. 13 4 92 2, 23 3 OV 2. 23 3. 07 2. 50 3. 60 1, 89 2~ e R - 30 pounds of nitrogen per sore R s 60 pounds, E3 90 pounds. Table 3. ? Lverage XiaM of ~ Porage in Pounds Per kore from Lufldn Soil Reoeiving Different Combinations...

Coffey, Lee Clayton

2012-06-07T23:59:59.000Z

74

Bioaugmentation of TNT-contaminated soil  

E-Print Network [OSTI]

Microbial transformation of trinitrotoluene (TNT) in phics. contaminated soil was investigated in this research. A Bacillus sp., isolated from soil obtained from an army ammunition facility, was used to enhance the rate of TNT removal over a 360 day...

Bokelmann, Annamarie

1999-01-01T23:59:59.000Z

75

Stainless steel corrosion by molten nitrates : analysis and lessons learned.  

SciTech Connect (OSTI)

A secondary containment vessel, made of stainless 316, failed due to severe nitrate salt corrosion. Corrosion was in the form of pitting was observed during high temperature, chemical stability experiments. Optical microscopy, scanning electron microscopy and energy dispersive spectroscopy were all used to diagnose the cause of the failure. Failure was caused by potassium oxide that crept into the gap between the primary vessel (alumina) and the stainless steel vessel. Molten nitrate solar salt (89% KNO{sub 3}, 11% NaNO{sub 3} by weight) was used during chemical stability experiments, with an oxygen cover gas, at a salt temperature of 350-700 C. Nitrate salt was primarily contained in an alumina vessel; however salt crept into the gap between the alumina and 316 stainless steel. Corrosion occurred over a period of approximately 2000 hours, with the end result of full wall penetration through the stainless steel vessel; see Figures 1 and 2 for images of the corrosion damage to the vessel. Wall thickness was 0.0625 inches, which, based on previous data, should have been adequate to avoid corrosion-induced failure while in direct contact with salt temperature at 677 C (0.081-inch/year). Salt temperatures exceeding 650 C lasted for approximately 14 days. However, previous corrosion data was performed with air as the cover gas. High temperature combined with an oxygen cover gas obviously drove corrosion rates to a much higher value. Corrosion resulted in the form of uniform pitting. Based on SEM and EDS data, pits contained primarily potassium oxide and potassium chromate, reinforcing the link between oxides and severe corrosion. In addition to the pitting corrosion, a large blister formed on the side wall, which was mainly composed of potassium, chromium and oxygen. All data indicated that corrosion initiated internally and moved outward. There was no evidence of intergranular corrosion nor were there any indication of fast pathways along grain boundaries. Much of the pitting occurred near welds; however this was the hottest region in the chamber. Pitting was observed up to two inches above the weld, indicating independence from weld effects.

Kruizenga, Alan Michael

2011-09-01T23:59:59.000Z

76

Reactions Between Water Soluble Organic Acids and Nitrates in...  

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

Reactions Between Water Soluble Organic Acids and Nitrates in Atmospheric Aerosols: Recycling of Nitric Acid and Formation of Reactions Between Water Soluble Organic Acids and...

77

ammonium nitrate solution: Topics by E-print Network  

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

2 % in the two experimental seasons. Key words: Date palm Fruit set Yield Fruit quality Boric acid Calcium nitrate INTRODUCTION synthesis, transport of sugars and carbohydrate...

78

acute uranyl nitrate: Topics by E-print Network  

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

2 % in the two experimental seasons. Key words: Date palm Fruit set Yield Fruit quality Boric acid Calcium nitrate INTRODUCTION synthesis, transport of sugars and carbohydrate...

79

ammonium nitrates: Topics by E-print Network  

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

2 % in the two experimental seasons. Key words: Date palm Fruit set Yield Fruit quality Boric acid Calcium nitrate INTRODUCTION synthesis, transport of sugars and carbohydrate...

80

ammonium nitrate pills: Topics by E-print Network  

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

2 % in the two experimental seasons. Key words: Date palm Fruit set Yield Fruit quality Boric acid Calcium nitrate INTRODUCTION synthesis, transport of sugars and carbohydrate...

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


81

ammonium nitrate solutions: Topics by E-print Network  

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

2 % in the two experimental seasons. Key words: Date palm Fruit set Yield Fruit quality Boric acid Calcium nitrate INTRODUCTION synthesis, transport of sugars and carbohydrate...

82

Soil Quality Information Sheet Rangeland Soil Quality--Soil Biota  

E-Print Network [OSTI]

powerhouse of soil, include an incredible diversity of organisms. Tons of soil biota, including micro

83

Steady state protein levels in Geobacter metallireducens grown with Iron (III) citrate or nitrate as terminal electron acceptor.  

SciTech Connect (OSTI)

Geobacter species predominate in aquatic sediments and submerged soils where organic carbon sources are oxidized with the reduction of Fe(III). The natural occurrence of Geobacter in some waste sites suggests this microorganism could be useful for bioremediation if growth and metabolic activity can be regulated. 2-DE was used to monitor the steady state protein levels of Geobacter metallireducens grown with either Fe(III) citrate or nitrate to elucidate metabolic differences in response to different terminal electron acceptors present in natural environments populated by Geobacter. Forty-six protein spots varied significantly in abundance (p<0.05) between the two growth conditions; proteins were identified by tryptic peptide mass and peptide sequence determined by MS/MS. Enzymes involved in pyruvate metabolism and the tricarboxylic acid (TCA) cycle were more abundant in cells grown with Fe(III) citrate, while proteins associated with nitrate metabolism and sensing cellular redox status along with several proteins of unknown function were more abundant in cells grown with nitrate. These results indicate a higher level of flux through the TCA cycle in the presence of Fe(III) compared to nitrate. The oxidative stress response observed in previous studies of Geobacter sulfurreducens grown with Fe(III) citrate was not seen in G. metallireducens.

Ahrendt, A. J.; Tollaksen, S. L.; Lindberg, C.; Zhu, W.; Yates, J. R., III; Nevin, K. P.; Lovley, D.; Giometti, C. S.; Biosciences Division; The Scripps Research Inst.; Univ. of Massachusetts

2007-01-01T23:59:59.000Z

84

E-Print Network 3.0 - aluminium nitrates Sample Search Results  

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

uranium... for uranium,.contaminated groundwater. Nitrate is a common co.contaminant with uranium. Nitrate inhib- ited U... Mexico. Once nitrate was depleted, both U(VI) and...

85

CU(II): catalyzed hydrazine reduction of ferric nitrate  

SciTech Connect (OSTI)

A method is described for producing ferrous nitrate solutions by the cupric ion-catalyzed reduction of ferric nitrate with hydrazine. The reaction is complete in about 1.5 hours at 40/sup 0/C. Hydrazoic acid is also produced in substantial quantities as a reaction byproduct.

Karraker, D.G.

1981-11-01T23:59:59.000Z

86

Nitrate-Cancrinite Precipitation on Quartz Sand in Simulated Hanford  

E-Print Network [OSTI]

Nitrate-Cancrinite Precipitation on Quartz Sand in Simulated Hanford Tank Solutions B A R R Y R . B minerals at the U.S. Department of Energy's Hanford site in Washington. Nitrate-cancrinite began's (DOE) Hanford Site in southeast Washington since the late 1950s (1). To predict the fate

Illinois at Chicago, University of

87

E-Print Network 3.0 - aqueous nitrate flowsheet Sample Search...  

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

Hanford Site, located in Southeastern Washington... tetrachloride (CT) and nitrate contamination covers at least 5 km2. Within this area, CT concentrations up to 1... nitrate...

88

E-Print Network 3.0 - aqueous magnesium nitrate Sample Search...  

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

magnesium nitrate Search Powered by Explorit Topic List Advanced Search Sample search results for: aqueous magnesium nitrate Page: << < 1 2 3 4 5 > >> 1 Subscriber access provided...

89

Effect of K loadings on nitrate formation/decomposition and on...  

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

K loadings on nitrate formationdecomposition and on NOx storage performance of K-based NOx storage-reduction Effect of K loadings on nitrate formationdecomposition and on NOx...

90

Thermal Decomposition of Nitrated Tributyl Phosphate  

SciTech Connect (OSTI)

Contact between tributyl phosphate and aqueous solutions of nitric acid and/or heavy metal nitrate salts at elevated temperatures can lead to exothermic reactions of explosive violence. Even though such operations have been routinely performed safely for decades as an intrinsic part of the Purex separation processes, several so-called ``red oil`` explosions are known to have occurred in the United States, Canada, and the former Soviet Union. The most recent red oil explosion occurred at the Tomsk-7 separations facility in Siberia, in April 1993. That explosion destroyed part of the unreinforced masonry walls of the canyon-type building in which the process was housed, and allowed the release of a significant quantity of radioactive material.

Paddleford, D.F. [Westinghouse Savannah River Company, Aiken, SC (United States); Hou, Y.; Barefield, E.K.; Tedder, D.W.; Abdel-Khalik, S.I. [Georgia Institute of Technology, GA (United States)

1995-01-01T23:59:59.000Z

91

ARRAYS OF BOTTLES OF PLUTONIUM NITRATE SOLUTION  

SciTech Connect (OSTI)

In October and November of 1981 thirteen approaches-to-critical were performed on a remote split table machine (RSTM) in the Critical Mass Laboratory of Pacific Northwest Laboratory (PNL) in Richland, Washington using planar arrays of polyethylene bottles filled with plutonium (Pu) nitrate solution. Arrays of up to sixteen bottles were used to measure the critical number of bottles and critical array spacing with a tight fitting Plexiglas® reflector on all sides of the arrays except the top. Some experiments used Plexiglas shells fitted around each bottles to determine the effect of moderation on criticality. Each bottle contained approximately 2.4 L of Pu(NO3)4 solution with a Pu content of 105 g Pu/L and a free acid molarity H+ of 5.1. The plutonium was of low 240Pu (2.9 wt.%) content. These experiments were sponsored by Rockwell Hanford Operations because of the lack of experimental data on the criticality of arrays of bottles of Pu solution such as might be found in storage and handling at the Purex Facility at Hanford. The results of these experiments were used “to provide benchmark data to validate calculational codes used in criticality safety assessments of [the] plant configurations” (Ref. 1). Data for this evaluation were collected from the published report (Ref. 1), the approach to critical logbook, the experimenter’s logbook, and communication with the primary experimenter, B. Michael Durst. Of the 13 experiments preformed 10 were evaluated. One of the experiments was not evaluated because it had been thrown out by the experimenter, one was not evaluated because it was a repeat of another experiment and the third was not evaluated because it reported the critical number of bottles as being greater than 25. Seven of the thirteen evaluated experiments were determined to be acceptable benchmark experiments. A similar experiment using uranyl nitrate was benchmarked as U233-SOL-THERM-014.

Margaret A. Marshall

2012-09-01T23:59:59.000Z

92

Groundwater nitrates in the Seymour Aquifer: problem or resource?  

E-Print Network [OSTI]

24 tx H2O Fall 2012 Story by Alejandra Arreola-Triana In the Rolling Plains of Texas, the Seymour Aquifer is the major source of water for Haskell, Jones and Knox counties. #31;e water from the Seymour Aquifer, however, contains nitrate levels... are working on ways to manage the nitrate levels in this aquifer. Tracking the source Nitrates in groundwater can come from runo#27;, fertilizer use, leaks from septic tanks, sewage and erosion of natural deposits, according to the U.S. Environmental...

Arreola-Triana, Alejandra

2012-01-01T23:59:59.000Z

93

Response of rice to ammonium and nitrate nitrogen applied at various stages of plant growth on limed and unlimed Beaumont and Lake Charles clays  

E-Print Network [OSTI]

RESPONSE OF RICE TO AMMONIUM AND NITRATE NITROGEN APPLIED AT VARIOUS STAGES OF PLANT GROWTH ON LIMED AND UNLINED BEAUNONT AND LAKE CHARLES CLAYS A Thesis By William B. Gay, III Submitted to the Graduate Sohool of the Agricultural... BEAUMONT AND LAKE CHARLES CLAYS A Thesis By Nilliam B. Gay, III Chairman of Committee Head of the Department of Soil Sc Crop Sciences ACKNOWLEDGEMENTS I would like to express my appreciation to Dr. A. G. Caldwell for his 1nterest and guidance...

Gay, William Blalock, III

1962-01-01T23:59:59.000Z

94

Degradation of the molecular weight and nitrate ester content of cellulose nitrate on thermal aging. [PBX-9404  

SciTech Connect (OSTI)

Changes in molecular weight and nitrate ester content for cellulose nitrate (NC), either pure or as a constituent of PBX-9404, were determined as a function of time and temperature. Changes in the number-averaged molecular weight, M/sub n/, are described by the simple theory of random chain scission, and M/sub n/ is found to correlate well with nitrate ester loss. Significant differences are seen between NC aged in the isolated condition and aged as the binder in PBX-9404.

Leider, H R

1981-06-01T23:59:59.000Z

95

Decontamination of water using nitrate selective ion exchange resin  

DOE Patents [OSTI]

A method for nitrate decontamination of water which involves passing the water through a bed of alkyl phosphonium anion exchange resin which has pendant alkyl groups of C[sub 3] or larger.

Lockridge, J.E.; Fritz, J.S.

1990-07-31T23:59:59.000Z

96

Nitrate contamination of domestic potable water supplies: a social problem  

SciTech Connect (OSTI)

Nitrate contamination of potable water supplies is a recognized health hazard. Potentially, the contamination of private drinking water supplies could be a problem in the rural Palouse area of Idaho and Washington. Studies have shown that 12% of the rural population of Whitman County, Washington, may be drinking water containing nitrates in excess of the national standard. Yet there is no organized concern about this potential health hazard among local citizens. After reviewing the literature on nitrate contamination of ground water and discussing nitrate contamination of private potable water supplies in the Palouse, we use a social movement theory of social problems to explain why this situation has not been defined as a public health problem.

Holmes, T.; Jensen, E.L.; Conway, J.B.

1985-01-01T23:59:59.000Z

97

Herbicide and nitrate distribution in central Iowa rainfall  

SciTech Connect (OSTI)

Herbicides are detected in rainfall; however, these are a small fraction of the total applied. This study was designed to evaluate monthly and annual variation in atrazine (6-chloro-N-ethyl-N{prime}-(1-methylethyl)-1,3,5-triazine-2,4-diamine), alachlor (2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamide), metolachlor (2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide), and NO{sub 3}-N concentrations in rainfall over Walnut Creek watershed south of Ames, IA. The study began in 1991 and continued through 1994. Within the watershed, two wet/dry precipitation samplers were positioned 4 km apart. Detections varied during the year with >90% of the herbicide detections occurring in April through early July. Concentrations varied among events from nondetectable amounts to concentrations of 154 {mu}g L{sup {minus}1}, which occurred when atrazine was applied during an extremely humid day immediately followed by rainfall of <10 mm that washed spray drift from the atmosphere. This was a local scale phenomenon, because the other collector had a more typical concentration of 1.7 {mu}g L{sup {minus}1} with an 8-mm rainfall. VAriation between the two collectors suggests that local scale meteorological processes affect herbicide movement. Yearly atrazine deposition totals were >100 {mu}g m{sup {minus}2} representing <0.1% of the amount applied. Nitrate-N concentrations in precipitation were uniformly distributed throughout the year and without annual variation in the concentrations. Deposition rates of NO{sub 3}-N were about 1.2 g m{sup {minus}2}. Annual loading onto the watershed was about 25% of the amount applied from all forms of N fertilizers. Movement and rates of deposition provide an understanding of the processes and magnitude of the impact of agriculture on the environment. 7 refs., 5 figs., 3 tabs.

Hatfield, J.L.; Prueger, J.H.; Pfeiffer, R.L. [National Soil Tilth Lab., Ames, IA (United States); Wesley, C.K. [Princeton Univ., NJ (United States)

1996-03-01T23:59:59.000Z

98

THE SOIL SCOOP by Clain Jones, Montana State University Extension Soil Fertility Specialist, and Kathrin Olson-Rutz, Research Associate  

E-Print Network [OSTI]

of energy for soil microorganisms.Although SOC makes up roughly 60% of SOM, only a portion the water solubleTHE SOIL SCOOP by Clain Jones, Montana State University Extension Soil Fertility Specialist, and Kathrin Olson-Rutz, Research Associate Evaluating Soil Quality and Health rate cycling timing

Lawrence, Rick L.

99

Managing Soil Salinity  

E-Print Network [OSTI]

This publication explains soil salinity, factors that contribute to it, and methods of correcting saline soils....

Provin, Tony; Pitt, John L.

2001-07-13T23:59:59.000Z

100

Crystal chemistry of thorium nitrates and chromates  

SciTech Connect (OSTI)

The structures and infrared spectra of six novel thorium compounds are reported. Th(NO{sub 3}){sub 2}(OH){sub 2}(H{sub 2}O){sub 2} (1) crystallizes in space group C2/c, a=14.050(1), b=8.992(7), c=5.954(5) A, {beta}=101.014(2){sup o}. K{sub 2}Th(NO{sub 3}){sub 6} (2), P-3, a=13.606(1), c=6.641(6) A. (C{sub 12}H{sub 28}N){sub 2}Th(NO{sub 3}){sub 6} (3), P2{sub 1}/c, a=14.643(4), b=15.772(5), c=22.316(5) A, {beta}=131.01(1){sup o}. KTh(NO{sub 3}){sub 5}(H{sub 2}O){sub 2} (4), P2{sub 1}/c, a=10.070(8), b=12.731(9), c=13.231(8) A, {beta}=128.647(4){sup o}. Th(CrO{sub 4}){sub 2}(H{sub 2}O){sub 2} (5), P2{sub 1}/n, a=12.731(1), b=9.469(8), c=12.972(1) A, {beta}=91.793(2){sup o}. K{sub 2}Th{sub 3}(CrO{sub 4}){sub 7}(H{sub 2}O){sub 10} (6), Ama2, a=19.302(8), b=15.580(6), c=11.318(6) A. The coordination polyhedra about Th in these structures are diverse. Th is coordinated by 9 O atoms in 5 and 6, seven of which are from monodentate (CrO{sub 4}) tetrahedra and two are (H{sub 2}O). The Th in compound 1 is coordinated by ten O atoms, four of which are O atoms of two bidentate (NO{sub 3}) triangles and six of which are (OH) and (H{sub 2}O). In compounds 2, 3 and 4 the Th is coordinate by 12 O atoms. In 2 and 3 there are six bidentate (NO{sub 3}) triangles, and in 4 ten of the O atoms are part of five bidentate (NO{sub 3}) triangles and the others are (H{sub 2}O) groups. The structural units of these compounds consist of a chain of thorium and nitrate polyhedra (1), isolated thorium hexanitrate clusters (2, 3), an isolated thorium pentanitrate dihydrate cluster (4), and a sheet (6) and framework (5) of thorium and chromate polyhedra. These structures illustrate the complexity inherent in the crystal chemistry of Th. - Graphical Abstract: The structures and infrared spectra of four new Th nitrates and two Th chromates are reported. The coordination numbers of the Th cations range from nine to 12 in these compounds. Structural units consist of isolated clusters, chains, sheets and frameworks.

Sigmon, Ginger E. [Department of Civil Engineering and Geological Sciences, University of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN 46556 (United States); Burns, Peter C., E-mail: pburns@nd.ed [Department of Civil Engineering and Geological Sciences, University of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN 46556 (United States)

2010-07-15T23:59:59.000Z

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


101

Soil Quality Information Sheet Rangeland Soil Quality--Infiltration  

E-Print Network [OSTI]

programs.) Persons with disabilities who require alternative means for communication of program information by infiltration. The infiltration rate can be restricted by poor management. Under these conditions, the water) and the infiltration rate. These are affected by vegetation and many soil properties. Residence time The length of time

102

THE SENSITIVITY OF CARBON STEELS' SUSCEPTIBILITY TO LOCALIZED CORROSION TO THE PH OF NITRATE BASED NUCLEAR WASTES  

SciTech Connect (OSTI)

The Hanford tank reservation contains approximately 50 million gallons of liquid legacy radioactive waste from cold war weapons production, which is stored in 177 underground storage tanks. The tanks will be in use until waste processing operations are completed. The wastes tend to be high pH (over 10) and nitrate based. Under these alkaline conditions carbon steels tend to be passive and undergo relatively slow uniform corrosion. However, the presence of nitrate and other aggressive species, can lead to pitting and stress corrosion cracking. This work is a continuation of previous work that investigated the propensity of steels to suffer pitting and stress corrosion cracking in various waste simulants. The focus of this work is an investigation of the sensitivity of the steels' pitting and stress corrosion cracking susceptibility tosimulant pH. Previous work demonstrated that wastes that are high in aggressive nitrate and low in inhibitory nitrite are susceptible to localized corrosion. However, the previous work involved wastes with pH 12 or higher. The current work involves wastes with lower pH of 10 or 11. It is expected that at these lower pHs that a higher nitrite-to-nitrate ratio will be necessary to ensure tank integrity. This experimental work involved both electrochemical testing, and slow strain rate testing at either the free corrosion potential or under anodic polarization. The results of the current work will be discussed, and compared to work previously presented.

BOOMER KD

2010-01-14T23:59:59.000Z

103

APBI 402 / SOIL 502 SUSTAINABLE SOIL MANAGEMENT  

E-Print Network [OSTI]

1 APBI 402 / SOIL 502 SUSTAINABLE SOIL MANAGEMENT TERM 1 - 2014/15 Lead Instructors*: Maja Krzic indicators to assess sustainability of land management practices. Characterize the soil chemical environment 402-Sustainable Soil Management SOIL 502-Advanced Sustainable Soil Management Final exam 35% Final

Farrell, Anthony P.

104

IMPORTED SOIL OR SOIL-FORMING MATERIALS  

E-Print Network [OSTI]

IMPORTED SOIL OR SOIL-FORMING MATERIALS PLACEMENT BPG NOTE 5 Best Practice Guidance for Land of heavy industry. Soil material initially present on a site may have been removed or stored in bunds the original soil that has been stored or importing a soil from elsewhere or using a soil-forming material

105

Soils and Environment Soil fertility and soil processes  

E-Print Network [OSTI]

be removed without blasting. Definition of soil #12; Land use planning, urbanization, timber management, landslides, and earthquakes Soils often carry a climatic signal Soil properties related to environmental soil. The fertile soils formed on glacial deposits in the mid-western United States are transported

Pan, Feifei

106

The moisture retention characteristic of four soils from Niger  

E-Print Network [OSTI]

of air at the surface is relatively facile. Hydraulic Conductivity Redistribution of soil water affects plant growth, and the rate and duration of internal moisture flow determines 19 effective soil water storage. This is important to remember when... in sorption (wetting). This characteristic of wetting versus drying for a soil is known as the hysteresis effect (Lal 1979a). Hillel (1980) notes that hysteresis is important for coarse-textured soils in the process of redistribution of soil water...

Landeck, Jonathon Keith

1984-01-01T23:59:59.000Z

107

LUMINESCENCE SPECTRA OF THE URANYL ION IN TWO GEOMETRICALLY SIMILAR COORDINATION ENVIRONMENTS: URANYL NITRATE HEXAHYDRATE AND DI-u-AQUO-BIS (DIOXODINITRA-TOURANIUM(VI) DI-IMIDAZOLE  

E-Print Network [OSTI]

coordination sphere of uranyl nitrate hexahydrate (UNH). U-Coordination Environments: Uranyl Nitrate Hexahydrate andin the crystal hosts of uranyl nitrate hexahydrate (UNH) and

Brittain, Harry G.

2013-01-01T23:59:59.000Z

108

QUANTIFYING ACCELERATED SOIL EROSION THROUGH ECOLOGICAL SITE-BASED ASSESSMENTS OF WIND AND WATER EROSION  

E-Print Network [OSTI]

QUANTIFYING ACCELERATED SOIL EROSION THROUGH ECOLOGICAL SITE- BASED ASSESSMENTS OF WIND AND WATER change and intensification have resulted in accelerated rates of soil erosion in many areas of the world quantification of accelerated soil erosion. Ecological site soil erosion Variation in the simulated erosion rates

109

The effect of various cropping systems upon the stability of aggregates: the rate of water infiltration, and the organic matter content of three soil conditions in the Texas Blacklands.  

E-Print Network [OSTI]

of the soil snd its relation to water oonserxation and to crop production has been recognised for a long tixm by uorkmrs e~ in agricultural research Soil fertility and plant growth are affected by a nuaber of faotarsx among which structurex organic matter.... . . , ?, ~ . ~ ~ ~ 31 ~ ~ ~ 32 ~ ~ ~ 33 Average pex'oentages of organic carbon in tbe surface layer of three land classes in 6 different cropping systelwl ~ ? ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ? ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 34 Analysis of varianoe of organic oarbon in tbs...

Quintero, Angel H

1951-01-01T23:59:59.000Z

110

Soil Quality Information Sheet Rangeland Soil Quality--  

E-Print Network [OSTI]

Soil Quality Information Sheet Rangeland Soil Quality-- Physical and Biological Soil Crusts USDA, Natural Resources Conservation Service May 2001 Rangeland Sheet 7 What are soil crusts? A physical crust is a thin layer with reduced porosity and increased density at the surface of the soil. A biological crust

111

STRUCTURE OF PENTAKIS (UREA) DIOXOURANIUM(VI)NITRATE LUO2 (OC (NH2)2)5 (NO3) 2  

E-Print Network [OSTI]

an aqueous solution of uranyl nitrate and urea which wasALL f(O,O.t» URANYL UREA NITRATE FOB AND FCA ARE THEFACTORS CO~TINUE& FOf URANYL UREA NITRATE l F[) B PAGE . ,

Zalkin, Allan

2011-01-01T23:59:59.000Z

112

Characterization of Surface and Bulk Nitrates of ?-Al2O3...  

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

Surface and Bulk Nitrates of ?-Al2O3-Supported Alkaline Earth Oxides using Density Functional Theory. Characterization of Surface and Bulk Nitrates of ?-Al2O3-Supported...

113

THE SYSTEM THORIUM NITRATE-WATER-NITRIC ACID AT 25 AND THE HYDRATES...  

Office of Scientific and Technical Information (OSTI)

SYSTEM THORIUM NITRATE-WATER-NITRIC ACID AT 25 AND THE HYDRATES OF THORIUM NITRATE Re-direct Destination: Temp Data Fields Ferraro, J.R.; Katzin, L.I. Temp Data Storage 3: Argonne...

114

THE SYSTEM THORIUM NITRATE-WATER-NITRIC ACID AT 25 AND THE HYDRATES...  

Office of Scientific and Technical Information (OSTI)

SYSTEM THORIUM NITRATE-WATER-NITRIC ACID AT 25 AND THE HYDRATES OF THORIUM NITRATE Re-direct Destination: times redirected to final destination ShortURL Code Published Current...

115

Waste Isolation Pilot Plant Nitrate Salt Bearing Waste Container  

E-Print Network [OSTI]

of Energy (DOE) and Nuclear Waste Partnership LLC (NWP), collectively referred to as the Permittees Isolation Plan (Plan) for identified nitrate salt bearing waste disposed in the Waste Isolation Pilot Plant detailed proposal for the expedited closure of underground Hazardous Waste Disposal Unit (HWDU) Panel 6, so

Napp, Nils

116

Regulation by nitrate of protein synthesis and translation of RNA in maize roots  

SciTech Connect (OSTI)

Roots of maize seedlings were exposed to /sup 35/S-methionine in the presence or absence of nitrate. Using SDS-PAGE, nitrate-induced changes in labeled polypeptides were noted in the soluble (at 92, 63 and 21kD) and organellar(at 14kD) fractions, as well as in a membrane fraction of putative tonoplast origin (at 31kD). No nitrate-induced changes were noted in a plasmamembrane-enriched fraction or in a membrane fraction of mixed origin. Total RNA from nitrate-treated and control roots was translated in a rabbit reticulocyte system. Five translation products (94, 63, 41, 39 and 21kD) were identified as nitrate-inducible by comparative gel electrophoresis. Changes in protein synthesis and translation of mRNA were apparent within 2-3 h after introduction of nitrate. Within 4-6 h after removal of nitrate, the level of nitrate-inducible translation products diminished to that of control roots. In contrast, the 31kD tonoplast polypeptide was still labeled 26 h after removal of external nitrate and /sup 35/S-methionine. The results will be discussed in relation to the nitrate induction of nitrate reductase, nitrite reductase, and the nitrate uptake system.

McClure, P.R.; Bouthyette, P.Y.

1986-04-01T23:59:59.000Z

117

The soil reference shrinkage curve  

E-Print Network [OSTI]

A recently proposed model showed how a clay shrinkage curve is transformed to the soil shrinkage curve at the soil clay content higher than a critical one. The objective of the present work was to generalize this model to the soil clay content lower a critical one. I investigated (i) the reference shrinkage curve, that is, one without cracks; (ii) the superficial layer of aggregates, with changed pore structure compared with the intraaggregate matrix; and (iii) soils with sufficiently low clay content where there are large pores inside the intraaggregate clay (so-called lacunar pores). The methodology is based on detail accounting for different contributions to the soil volume and water content during shrinkage. The key point is the calculation of the lacunar pore volume variance at shrinkage. The reference shrinkage curve is determined by eight physical soil parameters: (1) oven-dried specific volume; (2) maximum swelling water content; (3) mean solid density; (4) soil clay content; (5) oven-dried structural porosity; (6) the ratio of aggregate solid mass to solid mass of intraaggregate matrix; (7) the lacunar factor that characterizes the rate of the lacunar pore volume change with water content; and (8) oven-dried lacunar pore volume. The model was validated using available data. The model predicted value of the slope of the reference shrinkage curve in the basic shrinkage area is equal to unity minus the lacunar factor value, and is between unity and zero in the agreement with observations.

V. Y. Chertkov

2014-03-11T23:59:59.000Z

118

The Self-Ignition Temperatures of Bitumen Mixtures Containing Transition Metal Nitrates  

SciTech Connect (OSTI)

Information is provided on the self-ignition temperature (SIT) of blown bitumen asphalt mixed with sodium nitrate and some chemicals that are added in the bituminization process to adjust pH and to immobilize the radioactive isotopes of Cs, Sr, and I. In each ignition temperature test, the prepared bitumen sample was heated at a constant rate of temperature increase, and the ignition point was measured. Among the tested chemicals added to the bitumen, Ni(NO{sub 3}){sub 2} shows a relatively large SIT decrease, and furthermore, the mixture of Ni(NO{sub 3}){sub 2} and AgNO{sub 3} has been shown to greatly lower the SIT of blown bitumen. It is suggested that, in general, segregation of these nitrates should be avoided in bituminization, and care should be taken in handling Ag in a Purex reprocessing plant from the viewpoint of waste treatment. Furthermore, the oxidation effects of Fe(NO{sub 3}){sub 3} were tested by measuring torque of the bitumen sample. It was confirmed that the addition of Fe(NO{sub 3}){sub 3} to bitumen rapidly oxidizes the bitumen and increases the viscosity of the bitumen mixture.

Okada, Ken; Nomura, Masao; Fujii, Yasuhiko [Tokyo Institute of Technology (Japan)

2000-01-15T23:59:59.000Z

119

Nitrate Enhanced Microbial Cr(VI) Reduction-Final Report  

SciTech Connect (OSTI)

A major challenge for the bioremediation of radionuclides (i.e., uranium, technetium) and metals (i.e., Cr(VI), Hg) is the co-occurrence of nitrate as it can inhibit metal transformation. Denitrification (nitrate reduction to dinitrogen gas) is considered the most important ecological process. For many metal and metalloid reducing bacteria, however, ammonia is the end product through respiratory nitrate reduction (RNRA). The focus of this work was to determine how RNRA impacts Cr(VI) transformation. The goal was to elucidate the specific mechanism(s) that limits Cr(VI) reduction in the presence of nitrate and to use this information to develop strategies that enhance Cr(VI) reduction (and thus detoxification). Our central hypothesis is that nitrate impacts the biotransformation of metals and metalloids in three ways 1) as a competitive alternative electron acceptor (inhibiting transformation), 2) as a co-metabolite (i.e., concomitant reduction, stimulating transformation), and 3) as an inducer of specific proteins and pathways involved in oxidation/reduction reactions (stimulating transformation). We have identified three model organisms, Geobacter metallireducens (mechanism 1), Sulfurospirillum barnesii, (mechasism 2), and Desulfovibrio desulfuricans (mechanisms 3). Our specific aims were to 1) investigate the role of Cr(VI) concentration on the kinetics of both growth and reduction of nitrate, nitrite, and Cr(VI) in these three organisms; 2) develop a profile of bacterial enzymes involved in nitrate transformation (e.g., oxidoreductases) using a proteomic approach; 3) investigate the function of periplasmic nitrite reductase (Nrf) as a chromate reductase; and 4) develop a strategy to maximize microbial chromium reduction in the presence of nitrate. We found that growth on nitrate by G. metallireducens was inhibited by Cr(VI). Over 240 proteins were identified by LC/MS-MS. Redox active proteins, outer membrane heavy metal efflux proteins, and chemotaxis sensory proteins (Gmet_2478 and Gmet_1641) were up-regulated with exposure to Cr(VI). A nine-heme cytochrome C was purified that could reduce nitrite and could be oxidized by Cr(VI). For D. desulfuricans, we found that confirmed that Cr(VI) induced a prolonged lag period when Cr(VI) was reduced. Over three hundred proteins were unequivocally identified by LC/MS-MS and a significant number of down-regulated proteins for which the levels were changed >2 fold compared to control. Sulfite reductase levels were similar, however, nitrate and nitrite reductase were down-regulated. The supernatant of spent cultures was found to contain a filterable, heat stable compound that rapidly reduced Cr(VI). In addition, desulfoviridin was purified from nitrate grown cells and shown to have nitrite reductase activity that was inhibited by Cr(VI). For S. barnesii, periplasmic nitrate reductase (Nap), nitrite reductase (Nrf), and the metalloid reductase (Rar) were purified and characterized. The supernatant of spent cultures was also found to contain a filterable, heat stable compound that rapidly reduced Cr(VI) but that Rar also reduced Cr(VI). Our results from specific aims 1 through 3 indicate that for G. metallireducens, Cr(VI) inhibits nitrate respiration as it oxidizes cytochromes involved in nitrate respiration. Iron reduction is apparently not affected and the inhibitory affects of Cr(VI) may be attenuated by the addition of sufficient Fe(III) to generate Fe(II) that abiotically reduces the chromium. For S. barnesii, although the enzyme assays indicate that the components of the respiratory pathway for nitrate (e.g. Nap and Nrf) are inhibited by chromate, the organism has a mechanism to prevent this from actually occurring. Our current hypothesis is that the non-specific metalloid reductase (Rar) is providing resistance by reducing the Cr(VI). The strategy here would be to enhance its growth and metabolism in the natural setting. Lactate is a suitable electron donor for S. barnesii but other donors are possible. Although the version of the Phylochip used for monitoring the microb

John F. Stolz

2011-06-15T23:59:59.000Z

120

Rate Schedules  

Broader source: Energy.gov [DOE]

One of the major responsibilities of Southeastern is to design, formulate, and justify rate schedules. Repayment studies prepared by the agency determine revenue requirements and appropriate rate...

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


121

Uncovering Role of Symbiotic Fungi in Soil Carbon Storage | U...  

Office of Science (SC) Website

scarce for other carbon decomposers in the soil and consequently reducing their biomass and rates of decomposition. By contrast, arbuscular mycorrhizal fungi lack many of...

122

Safe conditions for contacting nitric acid or nitrates with tri-n-butyl phosphate (TBP)  

SciTech Connect (OSTI)

In response to a request from DOE-SR, the current state of knowledge of the reactions between TBP and aqueous nitrate solutions is critically reviewed, and recommendations are made for the safe operation of SRS separations equipment in which this combination of chemicals may be present. The existing limits for evaporation are validated. Guidelines are presented for cases in which general limits do not apply. The rate of reaction between nitric acid and TBP appears to be controlled by the rate of TBP hydrolysis. The hydrolysis reaction produces dibutyl phosphate and n-butanol. The hydrolysis rate is a strong function of temperature, and becomes very fast at temperatures in the range 130{degrees} to 150{degrees}C. The resulting n-butanol is volatile at high temperatures, boiling at 117.5{degrees}C, but is also subject to exothermic oxidation by nitric acid or nitrates. If oxidation occurs before the n-butanol evaporates, the heat of oxidation may exceed local cooling by convection. The resulting heating will further accelerate the reaction, leading to an energetic runaway and possibly (in confined systems) an explosion. Extensive experiments and practice have shown that in a well-mixed and well-vented aqueous system such as an evaporator, at moderate acidities and temperatures below 130{degrees}C, the heat of reaction is adequately removed by vaporization of steam. In general, the heating will be so slow that natural processes provide adequate cooling at temperatures below 80{degrees}C. Above this temperature, care should be taken to ensure that adequate cooling is available for the amount of TBP that may be present. Experiments suggest that in well-ventilated systems n-butanol evaporation and convective cooling are sufficient to control the reaction at temperatures up to 120{degrees}C.

Hyder, M.L

1994-01-01T23:59:59.000Z

123

Soil erosion and agricultural sustainability David R. Montgomery*  

E-Print Network [OSTI]

Soil erosion and agricultural sustainability David R. Montgomery* Department of Earth and Space conventionally plowed agricultural fields average 1­2 orders of magnitude greater than rates of soil production indicates that, considered globally, hill- slope soil production and erosion evolve to balance geologic

Montgomery, David R.

124

MINERALAVATER INTERFACE USING MOLECULAR SCALE TECHNIQUES An understanding of the kinetics and mechanisms of metal sorption on soil minerals and soils is  

E-Print Network [OSTI]

and mechanisms of metal sorption on soil minerals and soils is fundamental in assessing the speciation, mobility be understood if accurate predictions are to be made about metal fate/mobility and soil remediation. With some metals (e.g., Co, Ni, Zn) residence time affects the rate of metal release from soil minerals while

Sparks, Donald L.

125

The Aerobic Oxidation of Bromide to Dibromine Catalyzed by Homogeneous Oxidation Catalysts and Initiated by Nitrate in Acetic Acid  

SciTech Connect (OSTI)

A small amount of nitrate, ~0.002 molal, initiates the Co/Mn catalyzed aerobic oxidation of bromide compounds (HBr,NaBr,LiBr) to dibromine in acetic acid at room temperature. At temperatures 40oC or less , the reaction is autocatalytic. Co(II) and Mn(II) themselves and mixed with ionic bromide are known homogeneous oxidation catalysts. The reaction was discovered serendipitously when a Co/Br and Co/Mn/Br catalyst solution was prepared for the aerobic oxidation of methyaromatic compounds and the Co acetate contained a small amount of impurity i.e. nitrate. The reaction was characterized by IR, UV-VIS, MALDI and EXAFS spectroscopies and the coordination chemistry is described. The reaction is inhibited by water and its rate changed by pH. The change in these variables, as well as others, are identical to those observed during homogeneous, aerobic oxidation of akylaromatics. A mechanism is proposed. Accidental addition of a small amount of nitrate compound into a Co/Mn/Br/acetic acid mixture in a large, commercial feedtank is potentially dangerous.

Partenheimer, Walt; Fulton, John L.; Sorensen, Christina M.; Pham, Van Thai; Chen, Yongsheng

2014-06-01T23:59:59.000Z

126

Soil compaction is a manageable factor that can lim-it grain or silage yield on many Virginia soils. Corn  

E-Print Network [OSTI]

Soil compaction is a manageable factor that can lim- it grain or silage yield on many Virginia soils. Corn plants growing on compacted areas are often stunted and have slower root penetration rates grown in these areas. Compaction is created when soil particles are pressed together, reducing the pore

Liskiewicz, Maciej

127

Soil microbial biomass: an estimator of soil development in reclaimed lignite mine soil  

E-Print Network [OSTI]

A two-year study was conducted at the Big Brown lignite mine in Fairfield, Texas, to determine the rate and extent of recovery of the soil microbial biomass (SMB) in mixed overburden. The relationships between SMB carbon (SMBC), basal respiration...

Swanson, Eric Scott

1996-01-01T23:59:59.000Z

128

Energy Rating  

E-Print Network [OSTI]

Consistent, accurate, and uniform ratings based on a single statewide rating scale Reasonable estimates of potential utility bill savings and reliable recommendations on cost-effective measures to improve energy efficiency Training and certification procedures for home raters and quality assurance procedures to promote accurate ratings and to protect consumers Labeling procedures that will meet the needs of home buyers, homeowners, renters, the real estate industry, and mortgage lenders with an interest in home energy ratings

Cabec Conference; Rashid Mir P. E

2009-01-01T23:59:59.000Z

129

Soil Series  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBiSite CulturalDepartment ofat HomeAssurance: DOE NSoftwareSoil0

130

Building Fertile Soil  

E-Print Network [OSTI]

A Backyard Guide to Healthy Soil and Higher Yields, by JohnInstitute. Start with the Soil, by Grace Gershuny. Emmaus,Institute. 1993. The Soul of Soil: A Guide to Ecological

Lindsey, Ann

2008-01-01T23:59:59.000Z

131

Watershed scale fungal community characterization along a pH gradient in a subsurface environment co-contaminated with uranium and nitrate  

SciTech Connect (OSTI)

The objective of this study was to characterize fungal communities in a subsurface environment co-contaminated with uranium and nitrate at the watershed scale, and to determine the potential contribution of fungi to contaminant transformation (nitrate attenuation). The abundance, distribution and diversity of fungi in subsurface groundwater samples were determined using quantitative and semi-quantitative molecular techniques, including quantitative PCR of eukaryotic SSU rRNA genes and pyrosequencing of fungal internal transcribed spacer (ITS) regions. Potential bacterial and fungal denitrification was assessed in sediment-groundwater slurries amended with antimicrobial compounds and in fungal pure cultures isolated from subsurface. Our results demonstrate that subsurface fungal communities are dominated by members of the phylum Ascomycota, and a pronounced shift in fungal community composition occurs across the groundwater pH gradient at the field site, with lower diversity observed under acidic (pH < 4.5) conditions. Fungal isolates recovered from subsurface sediments were shown to reduce nitrate to nitrous oxide, including cultures of the genus Coniochaeta that were detected in abundance in pyrosequence libraries of site groundwater samples. Denitrifying fungal isolates recovered from the site were classified, and found to be distributed broadly within the phylum Ascomycota, and within a single genus within the Basidiomycota. Potential denitrification rate assays with sediment-groundwater slurries showed the potential for subsurface fungi to reduce nitrate to nitrous oxide under in situ acidic pH conditions.

Jasrotia, Puja [Florida State University, Tallahassee] [Florida State University, Tallahassee; Green, Stefan [University of Illinois, Chicago] [University of Illinois, Chicago; Canion, Andy [Florida State University, Tallahassee] [Florida State University, Tallahassee; Overholt, Will [Florida State University, Tallahassee] [Florida State University, Tallahassee; Prakash, Om [Florida State University, Tallahassee] [Florida State University, Tallahassee; Wafula, Dennis [Georgia Institute of Technology, Atlanta] [Georgia Institute of Technology, Atlanta; Hubbard, Daniela [Florida State University, Tallahassee] [Florida State University, Tallahassee; Watson, David B [ORNL] [ORNL; Schadt, Christopher Warren [ORNL] [ORNL; Brooks, Scott C [ORNL] [ORNL; Kostka, [Georgia Institute of Technology, Atlanta] [Georgia Institute of Technology, Atlanta

2014-01-01T23:59:59.000Z

132

HYDROGEN PRODUCTION BY THE CYANOBACTERIUM PLECTONEMA BORYANUM: EFFECTS OF INITIAL NITRATE CONCENTRATION, LIGHT INTENSITY, AND INHIBITION OF PHOTOSYSTEM II BY DCMU  

SciTech Connect (OSTI)

The alarming rate at which atmospheric carbon dioxide levels are increasing due to the burning of fossil fuels will have incalculable consequences if disregarded. Fuel cells, a source of energy that does not add to carbon dioxide emissions, have become an important topic of study. Although signifi cant advances have been made related to fuel cells, the problem of cheap and renewable hydrogen production still remains. The cyanobacterium Plectonema boryanum has demonstrated potential as a resolution to this problem by producing hydrogen under nitrogen defi cient growing conditions. Plectonema boryanum cultures were tested in a series of experiments to determine the effects of light intensity, initial nitrate concentration, and photosystem II inhibitor DCMU (3-(3,4- dichlorophenyl)-1,1-dimethylurea) upon hydrogen production. Cultures were grown in sterile Chu. No. 10 medium within photobioreactors constantly illuminated by halogen lights. Because the enzyme responsible for hydrogen production is sensitive to oxygen, the medium was continuously sparged with argon/CO2 (99.7%/0.3% vol/vol) by gas dispersion tubes immersed in the culture. Hydrogen production was monitored by using a gas chromatograph equipped with a thermal conductivity detector. In the initial experiment, the effects of initial nitrate concentration were tested and results revealed cumulative hydrogen production was maximum at an initial nitrate concentration of 1 mM. A second experiment was then conducted at an initial nitrate concentration of 1 mM to determine the effects of light intensity at 50, 100, and 200 ?mole m-2 s-1. Cumulative hydrogen production increased with increasing light intensity. A fi nal experiment, conducted at an initial nitrate concentration of 2 mM, tested the effects of high light intensity at 200 and 400 ?mole m-2 s-1. Excessive light at 400 ?mole m-2 s-1 decreased cumulative hydrogen production. Based upon all experiments, cumulative hydrogen production rates were optimal at an initial nitrate concentration of 1 mM and a light intensity of 100 ?mole m-2 s-1. DCMU was shown in all experiments to severely decrease hydrogen production as time progressed. With the information acquired so far, future experiments with reducing substances could determine maximum rates of hydrogen production. If maximum hydrogen production rates proved to be large enough, Plectonema boryanum could be grown on an industrial scale to provide hydrogen gas as a renewable fuel.

Carter, B.; Huesemann, M.

2008-01-01T23:59:59.000Z

133

Real time in situ detection of organic nitrates in atmospheric aerosols  

SciTech Connect (OSTI)

A new field instrument is described that quantifies total particle phase organic nitrates. The instrument is based on the thermal dissociation laser induced fluorescence (TD-LIF) method that thermally converts nitrates to NO2 which is then detected by LIF. This instrument is unique in its ability to provide fast sensitive measurements of particle phase organic nitrates, without interference from inorganic nitrate. Here we use it to quantify organic nitrates in SOA generated from high-NOx photooxidation of limonene, a-pinene, D-3-carene, and tridecane. In these experiments the organic nitrate moiety is observed to be 6-15percent of the total SOA mass, depending on the organic precursor.

Rollins, Andrew W.; Smith, Jared D.; Wilson, Kevin R.; Cohen, Ronald C.

2010-06-11T23:59:59.000Z

134

CROP & SOIL SCIENCES Soybean Breeding  

E-Print Network [OSTI]

CROP & SOIL SCIENCES Soybean Breeding Committee Membership Dr. Joseph Bouton - committee chair Dr. Brian Schwartz Department of Crop & Soil Sciences Department of Crop & Soil Sciences University & Soil Sciences Department of Crop & Soil Sciences University of Georgia University of Georgia Center

Arnold, Jonathan

135

CROP & SOIL SCIENCES Forage Breeding  

E-Print Network [OSTI]

CROP & SOIL SCIENCES Forage Breeding Committee Membership Dr. Joseph Bouton - committee chair Dr. Brian Schwartz Department of Crop & Soil Sciences Department of Crop & Soil Sciences University & Soil Sciences Department of Crop & Soil Sciences University of Georgia University of Georgia Center

Arnold, Jonathan

136

E-Print Network 3.0 - ammonium nitrate melt Sample Search Results  

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

on Peat Decomposition in Plum Summary: , phosphate, ammonium and DIC on all of the water samples. Nitrate concentrations were measured according... ;11 indicating greater...

137

E-Print Network 3.0 - aqueous nitrate solutions Sample Search...  

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

Biology and Medicine 23 Evaluation for Biological Reduction of Nitrate and Perchlorate in Brine Water Using Summary: in high salt solution. One culture was capable of reducing up...

138

E-Print Network 3.0 - alkaline nitrate solutions Sample Search...  

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

2010 www.atmos-chem-phys.net1039992010 Summary: . The model in- cludes explicit transport of size-resolved mineral dust and its alkalinity, nitrate... in terms of...

139

E-Print Network 3.0 - anaerobic nitrate-dependent oxidation Sample...  

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

of the experiment... nitrate- dependent Fe(II) ... Source: Roden, Eric E. - Department of Geology and Geophysics, University of Wisconsin at Madison Collection: Environmental...

140

Ureides in active and nitrate-repressed soybean nodules  

E-Print Network [OSTI]

) detected ureides in his final preparations of two acid soluble peptides which seemed to be associated with nitrogen fixation. He presented evidence that these crude preparations were able to: A) bind and release NH ; and 8) reduce the triple bond... (----1 of nitrate, were analyzed on a Beckman 120B automatic amino acid analyzer. The post arginine peaks (I, II, III) were measured. 38 Table 4. The Effect of N03 on Acid-Soluble Peptide(s) from Soybean Nodules. Acid-soluble ex- tracts were...

Bundy, Timothy K.

1983-01-01T23:59:59.000Z

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


141

Environmental Soil Chemistry Second Edition Environmental Soil Chemistry illustrates fundamental principles of soil  

E-Print Network [OSTI]

Environmental Soil Chemistry Second Edition Environmental Soil Chemistry illustrates fundamental principles of soil chemistry with respect to environmental reactions between soils and other natural contemporary training in the basics of soil chemistry and applications to real-world environmental concerns

Sparks, Donald L.

142

Soil Testing and Research  

E-Print Network [OSTI]

Soil Testing and Research Analytical Laboratory Copyright © 2014 University of Minnesota Soil Testing and Research Analytical Laboratory Department of Soil, Water and Climate College of Food payable to the University of Minnesota We also accept the following credit cards: Soil Testing

Ciocan-Fontanine, Ionut

143

Indiana Soil and Landscape  

E-Print Network [OSTI]

Indiana Soil and Landscape Evaluation Manual Version 1.0 D.P. Franzmeier G.C. Steinhardt D soil scientists to be the state soil. The scale on the gray panel is in decimeters and feet. The upper 18 inches (46 cm) of the soil formed in Wisconsinan age loess, and the lower part formed

Holland, Jeffrey

144

Extraction, Degradation, and Microbial Respiration Effects of Mesotrione in Selected Texas Soils  

E-Print Network [OSTI]

of atrazine on mesotrione degradation in soil; and 3) determine if mesotrione, mesotrione + atrazine treatments, and application rates had an impact on soil microbial activity (respiration). In the first experiment, mesotrione recoveries were...

Romero, Madahy B

2014-08-08T23:59:59.000Z

145

Silicon absorption by sugarcane: effect of soils type and silicate fertilization  

E-Print Network [OSTI]

G et al, Effect of Ca-silicate amendments on soil chemicalResponse of sugarcane to silicate source ad rate. I. GrowthSoil and plant silicon and silicate response by sugarcane.

Sartori de Camargo, Mônica; Korndörfer, Gaspar Henrique; Wyler, Patricia

2009-01-01T23:59:59.000Z

146

Soil and Water Assessment Tool Theoretical Documentation Version 2009  

E-Print Network [OSTI]

, the runoff volume and a partitioning factor. Sediment transport of P is simulated with a loading function as described in organic N transport. INTRODUCTION 19 Figure 0.7: Partitioning of Phosphorus in SWAT 0.2.1.6 PESTICIDES Although SWAT...:1.9 NITRATE IN THE SHALLOW AQUIFER 199 3:1.10 NOMENCLATURE 201 3:1.11 REFERENCES 203 CHAPTER 3:2 EQUATIONS: PHOSPHORUS 206 3:2.1 PHOSPHORUS CYCLE 207 INITIALIZATION OF SOIL PHOSPHORUS LEVELS 208 3:2.2 MINERALIZATION...

Neitsch, S.L.; Arnold, J.G.; Kiniry, J.R.; Williams, J.R.

147

Extractable soil phosphorus, correlation with P forms in soil runoff, and relationships with the Texas p index as a nutrient management tool for cafos  

E-Print Network [OSTI]

................................................................................................. 125 35 Relationship between P index ratings with Mehlich III or TAMU soil test P (STP) and phosphorus loads using RUSLE2 erosion estimates............................................................................................ 126... 36 Relationship between P index ratings with Mehlich III or TAMU soil test P (STP) and phosphorus loads using measured erosion rates................................................................................................... 128...

Jacoby, Freddy J.

2006-08-16T23:59:59.000Z

148

Nitrification Capacities of Texas Soil Types and Factors which Affect Nitrification.  

E-Print Network [OSTI]

and Chemical Conversion of Nitrites to Nitrates .......... -31 . .................................. Effect of Sunlight on Nitrification 2.5 Effect of Water Content, Puddling and Water-logging on Nitrification 27 Nitrification of Ammonium Salts of Organic... wooden pestle in a ~vooclen box. Sinaller san- ples were passed through a I millimeter (111.m.) sieve. The average chemical composition of soil types of Texas is cliq- cussed in Texas Station Bulletin No. 549 (26). In the nitrification tests (eS), 100...

Sterges, A. J.; Fraps, G S. (George Stronach)

1947-01-01T23:59:59.000Z

149

Volatile organic compound losses from sewage sludge-amended soils  

SciTech Connect (OSTI)

Volatile organic compounds (VOCs) applied to soil in sludge have been assumed to disappear quickly and completely. The VOC behavior in sludge-amended soils has been studied previously only in laboratory systems where the sludged soil has been spiked with compounds of interest. Behavior in these systems may not necessarily represent compound behavior in field soils to which contaminated sludge is added. A series of laboratory microcosm experiments were designed therefore to investigate the behavior of toluene, ethyl benzene, o-, m-, and p-xylene applied to soil in contaminated sludge, and factors influencing loss processes. The VOC loss from sludge-amended soil was well described by a simple one step pseudo-first-order model but in certain soils was better described by a two step first-order model. Volatilization was the predominant loss process. Rates of loss depended on sludge application rate, method of sludge application, soil properties, and on compound characteristics. Experiments indicated that spiking sludge-amended soils gave a reasonable indication of VOC loss rates from systems amended with contaminated sludge at least over a period of 23 d. The majority of VOCs applied to soils in sludge volatilizes quickly to the atmosphere over a few to 10s of days with a small fraction lost more slowly. Potential for VOC crop uptake, livestock ingestion, and contamination of ground water is low under routine, managed applications of sewage sludge to agricultural land.

Wilson, S.C.; Jones, K.C.

1999-08-01T23:59:59.000Z

150

Effects of Nitrate on Decomposition in Salt Marsh Peats Arianna Goodman  

E-Print Network [OSTI]

Effects of Nitrate on Decomposition in Salt Marsh Peats Arianna Goodman Oberlin College `13 Advisor and loss. Rapid nitrate addition to salt marshes may stimulate bacterial decomposition of existing peat, and the decomposition may contribute to creek bank destabilization and collapse. Alternately, peat deposited in high

Vallino, Joseph J.

151

Infrared Spectroscopy of the Microhydrated Nitrate Ions NO3 Daniel J. Goebbert,,  

E-Print Network [OSTI]

Infrared Spectroscopy of the Microhydrated Nitrate Ions NO3 - (H2O)1-6 Daniel J. Goebbert ReceiVed: April 15, 2009 We present infrared photodissociation spectra of the microhydrated nitrate ions the infrared spectroscopy of NO3 - (H2O)n clusters, n ) 1-6. The gas-phase vibrational spectroscopy of NO3

Neumark, Daniel M.

152

Nitrate-responsive miR393/AFB3 regulatory module controls root system architecture in  

E-Print Network [OSTI]

environmental conditions is the modulation of root system architecture (RSA) in response to nitrate supplyNitrate-responsive miR393/AFB3 regulatory module controls root system architecture in ArabidopsisR393/AFB3 is a unique N- responsive module that controls root system architecture in response

Green, Pamela

153

Strontium sorption and precipitation behaviour during bioreduction in nitrate impacted sediments  

E-Print Network [OSTI]

radionuclides (e.g. U and Tc) from groundwaters at these sites is a key challenge for nuclear decommissioning D. Bryan a , Katherine Morris a, a Research Centre for Radwaste and Decommissioning and Williamson Nitrate Nuclear The behaviour of strontium (Sr2+ ) during microbial reduction in nitrate impacted

Burke, Ian

154

Correction to ``Nitrate and colloid transport through coarse Hanford sediments under steady state,  

E-Print Network [OSTI]

Correction to ``Nitrate and colloid transport through coarse Hanford sediments under steady state), Correction to ``Nitrate and colloid transport through coarse Hanford sediments under steady state, variably and colloid transport through coarse Hanford sediments under steady state, variably saturated flow'' by Kelly

Flury, Markus

155

The fate and transport of nitrate in shallow groundwater in northwestern Mississippi, USA  

E-Print Network [OSTI]

modeling . USA Introduction Nitrate is the primary form of dissolved nitrogen in natural waters (MuellerThe fate and transport of nitrate in shallow groundwater in northwestern Mississippi, USA Heather L. Welch & Christopher T. Green & Richard H. Coupe Abstract Agricultural contamination of groundwater

156

Homeowner Soil Sample Information Form  

E-Print Network [OSTI]

Homeowners should submit this form with their soil samples when requesting a soil test from the Texas A&M Soil Testing Laboratory....

Provin, Tony

2007-04-11T23:59:59.000Z

157

Analysis of Enriched Uranyl Nitrate in Nested Annular Tank Array  

SciTech Connect (OSTI)

Two series of experiments were performed at the Rocky Flats Critical Mass Laboratory during the 1980s using highly enriched (93%) uranyl nitrate solution in annular tanks. [1, 2] Tanks were of typical sizes found in nuclear production plants. Experiments looked at tanks of varying radii in a co-located set of nested tanks, a 1 by 2 array, and a 1 by 3 array. The co-located set of tanks had been analyzed previously [3] as a benchmark for inclusion within the International Handbook of Evaluated Criticality Safety Benchmark Experiments. [4] The current study represents the benchmark analysis of the 1 by 3 array of a series of nested annular tanks. Of the seventeen configurations performed in this set of experiments, twelve were evaluated and nine were judged as acceptable benchmarks.

John D. Bess; James D. Cleaver

2009-06-01T23:59:59.000Z

158

Selective and quantitative nitrate electroreduction to ammonium using a porous copper electrode in an electrochemical flow cell  

E-Print Network [OSTI]

,version1-10Jul2014 #12;3 1. Introduction Nitrate ions (NO3 - ) contamination of ground and surface water and physiochemical methods are used for nitrate removal from contaminated water but show drastic limits are costly [10] and produce secondary brine wastes, because the nitrate are only separated but not destroyed

Paris-Sud XI, Université de

159

Soil Test P vs. Total P in Wisconsin Soils  

E-Print Network [OSTI]

Soil Test P vs. Total P in Wisconsin Soils Larry G. Bundy & Laura W. Good Department of Soil Science University of Wisconsin-Madison #12;Introduction · Soil test P is often measured · Little information is available on total P content of soils · Why do we care about total P now? ­ Soil total P

Balser, Teri C.

160

Extractable soil phosphorus in Blackland Prairie soils  

E-Print Network [OSTI]

The Texas Agricultural Extension Service (TAEX) Soil Testing Laboratory currently utilizes a single phosphorus (P) extractant consisting of 1.43 M NH4OAc, 1. 0 M HCl, and 0.025 M EDTA-PH 4.2 to estimate plant available P for all soils in Texas...

Byrd, Robert Claude

2012-06-07T23:59:59.000Z

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


161

Nitrification in Texas Soils.  

E-Print Network [OSTI]

have a high nitrificati is the balmcing of these extremes which redlices the average le between acid ancl non-acid soils. C03TPOSITION OF SOILS TVITFI LOW AND HIGH NITRIFIC-4TION. Table 11 contains the chemical composition of soils having low nitl... are subsoils. Subsoils thus possess nnu~nally high and unusually low nitrification. Table 11.-Chemical composition of soils with nitrification below 10 . I Average .............................. Nitri- fication 7164 7090 4596' 5710 4645 3976 3657 3...

Fraps, G. S. (George Stronach)

1920-01-01T23:59:59.000Z

162

UNSATURATED SOIL MECHANICS IMPLEMENTATION  

E-Print Network [OSTI]

UNSATURATED SOIL MECHANICS IMPLEMENTATION DURING PAVEMENT CONSTRUCTION QUALITY ASSURANCE Mn !! Performance Based Construction QA !! Unsaturated Soil Mechanics !! What We've Learned !! Next Steps #12.6-6.0 5 - 7 19 0.8 5 7 - 9 24 1.1 4 9 - 11 28 1.2 4 #12;Unsaturated Soil Mechanics #12;Fundamentals

Minnesota, University of

163

Rate schedule  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared at 278, 298, andEpidermal Growth Factor. |INCIDENCET3PACI-T3Rate

164

Materials corrosion of high temperature alloys immersed in 600C binary nitrate salt.  

SciTech Connect (OSTI)

Thirteen high temperature alloys were immersion tested in a 60/40 binary nitrate salt. Samples were interval tested up to 3000 hours at 600%C2%B0C with air as the ullage gas. Chemical analysis of the molten salt indicated lower nitrite concentrations present in the salt, as predicted by the equilibrium equation. Corrosion rates were generally low for all alloys. Corrosion products were identified using x-ray diffraction and electron microprobe analysis. Fe-Cr based alloys tended to form mixtures of sodium and iron oxides, while Fe-Ni/Cr alloys had similar corrosion products plus oxides of nickel and chromium. Nickel based alloys primarily formed NiO, with chromium oxides near the oxide/base alloy interface. In625 exhibited similar corrosion performance in relation to previous tests, lending confidence in comparisons between past and present experiments. HA230 exhibited internal oxidation that consisted of a nickel/chromium oxide. Alloys with significant aluminum alloying tended to exhibit superior performance, due formation of a thin alumina layer. Soluble corrosion products of chromium, molybdenum, and tungsten were also formed and are thought to be a significant factor in alloy performance.

Kruizenga, Alan Michael; Gill, David Dennis; LaFord, Marianne Elizabeth

2013-03-01T23:59:59.000Z

165

Experimental unsaturated soil mechanics  

E-Print Network [OSTI]

In this general report, experimental systems and procedures of investigating the hydro-mechanical behaviour of unsaturated soils are presented. The water retention properties of unsaturated soils are commented and linked to various physical parameters and properties of the soils. Techniques of controlling suction are described together with their adaptation in various laboratory testing devices. Some typical features of the mechanical behaviour of unsaturated soils are presented within an elasto-plastic framework. An attempt to describe the numerous and significant recent advances in the investigation of the behaviour of unsaturated soils, including the contributions to this Conference, is proposed.

Delage, Pierre

2008-01-01T23:59:59.000Z

166

NITRATE CONVERSION OF HB-LINE REILLEXTM HPQ RESIN  

SciTech Connect (OSTI)

Reillex{trademark} HPQ ion exchange resin is used by HB Line to remove plutonium from aqueous streams. Reillex{trademark} HPQ resin currently available from Vertellus Specialties LLC is a chloride ionic form, which can cause stress corrosion cracking in stainless steels. Therefore, HB Line Engineering requested that Savannah River National Laboratory (SRNL) convert resin from chloride form to nitrate form in the Engineering Development Laboratory (EDL). To perform this task, SRNL treated two batches of resin in 2012. The first batch of resin from Reilly Industries Batch 80302MA was initially treated at SRNL in 2001 to remove chloride. This batch of resin, nominally 30 liters, has been stored wet in carboys since that time until being retreated in 2012. The second batch of resin from Batch 23408 consisted of 50 kg of new resin purchased from Vertellus Specialties in 2012. Both batches were treated in a column designed to convert resin using downflow of 1.0 M sodium nitrate solution through the resin bed followed by rinsing with deionized water. Both batches were analyzed for chloride concentration, before and after treatment, using Neutron Activation Analysis (NAA). The resin specification [Werling, 2003] states the total chlorine and chloride concentration shall be less than 250 ppm. The resin condition for measuring this concentration is not specified; however, in service the resin would always be fully wet. Measurements in SRNL showed that changing from oven dry resin to fully wet resin, with liquid in the particle interstices but no supernatant, increases the total weight by a factor of at least three. Therefore, concentration of chlorine or chloride expressed as parts per million (ppm) decreases by a factor of three. Therefore, SRNL recommends measuring chlorine concentration on an oven dry basis, then dividing by three to estimate chloride concentration in the fully wet condition. Chloride concentration in the first batch (No.80302MA) was nearly the same before the current treatment (759 ppm dry) and after treatment (745 ppm dry or {approx}248 ppm wet). Treatment of the second batch of resin (No.23408) was very successful. Chloride concentration decreased from 120,000 ppm dry to an average of 44 ppm dry or {approx}15ppm wet, which easily passes the 250 ppm wet criterion. Per guidance from HB Line Engineering, SRNL blended Batch 80302 resin with Batch P9059 resin which had been treated previously by ResinTech to remove chloride. The chloride concentrations for the two drums of Batch P9059 were 248 ppm dry ({approx}83 ppm wet) {+-}22.8% and 583 ppm dry ({approx}194 ppm wet) {+-} 11.8%. The blended resin was packaged in five gallon buckets.

Steimke, J.; Williams, M.; Steeper, T.; Leishear, R.

2012-05-29T23:59:59.000Z

167

acid sandy soils: Topics by E-print Network  

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

incorporated into in situ soil cores at a rate of 350 kg N ha-1 and compared to unamended controls. Microbial properties were determined by microbial biomass N, dehydrogenase...

168

acid soils: Topics by E-print Network  

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

incorporated into in situ soil cores at a rate of 350 kg N ha-1 and compared to unamended controls. Microbial properties were determined by microbial biomass N, dehydrogenase...

169

acid sulphate soil: Topics by E-print Network  

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

incorporated into in situ soil cores at a rate of 350 kg N ha-1 and compared to unamended controls. Microbial properties were determined by microbial biomass N, dehydrogenase...

170

acidic soil amended: Topics by E-print Network  

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

incorporated into in situ soil cores at a rate of 350 kg N ha-1 and compared to unamended controls. Microbial properties were determined by microbial biomass N, dehydrogenase...

171

acid sandy soil: Topics by E-print Network  

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

incorporated into in situ soil cores at a rate of 350 kg N ha-1 and compared to unamended controls. Microbial properties were determined by microbial biomass N, dehydrogenase...

172

acid soil technical: Topics by E-print Network  

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

incorporated into in situ soil cores at a rate of 350 kg N ha-1 and compared to unamended controls. Microbial properties were determined by microbial biomass N, dehydrogenase...

173

acid sulphate soils: Topics by E-print Network  

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

incorporated into in situ soil cores at a rate of 350 kg N ha-1 and compared to unamended controls. Microbial properties were determined by microbial biomass N, dehydrogenase...

174

A DECISION SUPPORT SYSTEM FOR SOIL PRODUCTIVITY AND EROSION POLK COUNTY, NEBRASKA  

E-Print Network [OSTI]

A DECISION SUPPORT SYSTEM FOR SOIL PRODUCTIVITY AND EROSION IN POLK COUNTY, NEBRASKA A.E. Gadem1-based decision-support systems are powerful, new tools for assessing inherent soil productivity and potential conservation strategies to reduce soil-loss in areas with high potential erosion rates. These decision support

Reichenbach, Stephen E.

175

Using chemical tracers in hillslope soils to estimate the importance of chemical denudation under  

E-Print Network [OSTI]

also examine relationships between transient mechanical and chemical denudation rates. Soil particle, burrowing by mammals, or freeze-thaw mechanisms [e.g., see Birkeland, 1999]. Once created, mobile soilUsing chemical tracers in hillslope soils to estimate the importance of chemical denudation under

176

Global Change Biology (2000) 6, 317328 Soil Carbon Sequestration and Land-Use Change: Processes and  

E-Print Network [OSTI]

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

Post, Wilfred M.

177

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 that may result in enhanced soil carbon sequestration with changes in land-use and soil management. We carbon accumulation. This data summary provides a guide to approximate rates of SOC sequestration

178

A low-temperature process for the denitration of Hanford single-shell tank, nitrate-based waste utilizing the nitrate to ammonia and ceramic (NAC) process  

SciTech Connect (OSTI)

Bench-top feasibility studies with Hanford single-shell tank (SST) simulants, using a new, low-temperature (50 to 60C) process for converting nitrate to ammonia and ceramic (NAC), have conclusively shown that between 85 to 99% of the nitrate can be readily converted. In this process, aluminum powders or shot can be used to convert alkaline, nitrate-based supernate to ammonia and an aluminum oxide-sodium aluminate-based solid which might function as its own waste form. The process may actually be able to utilize already contaminated aluminum scrap metal from various DOE sites to effect the conversion. The final, nearly nitrate-free ceramic-like product can be pressed and sintered like other ceramics. Based upon the starting volumes of 6.2 and 3.1 M sodium nitrate solution, volume reductions of 50 to 55% were obtained for the waste form produced, compared to an expected 35 to 50% volume increase if the Hanford supernate were grouted. Engineering data extracted from bench-top studies indicate that the process will be very economical to operate, and data were used to cost a batch, 1,200-kg NO{sub 3}/h plant for working off Hanford SST waste over 20 years. Their total process cost analysis presented in the appendix, indicates that between $2.01 to 2.66 per kilogram of nitrate converted will be required. Additionally, data on the fate of select radioelements present in solution are presented in this report as well as kinetic, operational, and control data for a number of experiments. Additionally, if the ceramic product functions as its own waste form, it too will offer other cost savings associated with having a smaller volume of waste form as well as eliminating other process steps such as grouting.

Mattus, A.J.; Lee, D.D.; Dillow, T.A.; Farr, L.L.; Loghry, S.L.; Pitt, W.W.; Gibson, M.R.

1994-12-01T23:59:59.000Z

179

Utilizing Microalgae to Remediate Nitrate-Contaminated Groundwater N. Case, M. Sommerfeld, H. Qiang  

E-Print Network [OSTI]

Utilizing Microalgae to Remediate Nitrate-Contaminated Groundwater N. Case, M. Sommerfeld, H. Qiang or domestic animals. It can also be used as a fertilizer or converted to biofuels. The photobioreactor can

Hall, Sharon J.

180

The Effect of Nanoparticle Concentration on Thermo-physical Properties of Alumina-nitrate Nanofluid  

E-Print Network [OSTI]

The objective of this study was to determine how Al2O3 nanoparticle concentration affected the specific heat, heat of fusion, melting point, thermal diffusivity and thermal conductivity of Alumina-Nitrate nanofluids. Al2O3 nanoparticles were...

Shao, Qian

2013-02-15T23:59:59.000Z

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


181

Nighttime Measurements of Dinitrogen Pentoxide and the Nitrate Radical via Cavity Ring-Down Spectroscopy  

E-Print Network [OSTI]

technique, known as cavity ring-down spectroscopy, will be introduced for simultaneously measuring the nitrate radical and dinitrogen pentoxide. The cavity ring-down spectrometer was initially designed and constructed based on the experiments by Steven Brown...

Perkins, Katie C.

2010-10-12T23:59:59.000Z

182

Nitrate and sulphate dynamics in peat subjected to different hydrological conditions: Batch experiments and field comparison  

E-Print Network [OSTI]

Nitrate and sulphate dynamics in peat subjected to different hydrological conditions: Batch concentrations were investigated in bioreactors, using peat samples from field sites influenced by different hydrologic regimes. In this experiment, peat samples were subjected to similar conditions to address

Paris-Sud XI, Université de

183

Sodium-Copper Exchange on Wyoming Montmorillonite in Chloride, Perchlorate, Nitrate, and Sulfate Solutions  

E-Print Network [OSTI]

Sodium-Copper Exchange on Wyoming Montmorillonite in Chloride, Perchlorate, Nitrate, and Sulfate. The copper exchange capacity (CuEC) and Na-Cu exchange reactions on Wyoming montmo- rillonite were studied

Sparks, Donald L.

184

Application of Artificially Immobilized Microorganisms to Nitrate Removal from Drinking Water  

E-Print Network [OSTI]

to Nitrate Removal from Drinking Water By Sean X. Liu andFor biological treatment of drinking water, several crucialalginate gel beads to drinking water treatment has proved to

Liu, Sean X; Hermanowicz, Slawomir W

1997-01-01T23:59:59.000Z

185

E-Print Network 3.0 - alkali metal nitrate Sample Search Results  

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

0021-91930104.00 0 DOI: 10.1128JB.183.19.54915495.2001 Summary: for this heavy metal for its anaerobic growth mode on nitrate (1). However, also in this organism,...

186

Cement kiln flue dust as a source of lime and potassium in four East Texas soils  

E-Print Network [OSTI]

design on both sites. Yield, soil pH, plant and soil concentrations of K, Ca, and Mg were determined. Soil pH and extractable Ca increased with increasing rate of flue dust or calcite. Under field conditions, flue dust compared favorably with calcite... was similar to plant uptake from corresponding calcite + KC1 treatments. Soil pH and extractable soil K, Ca, and Mg increased with increased rate of flue dust treatment equally as well as from the corresponding calcite treatments. The flue dust was equal...

Poole, Warren David

1975-01-01T23:59:59.000Z

187

Soil Quality Information Sheet Rangeland Soil Quality--Introduction  

E-Print Network [OSTI]

Soil Quality Information Sheet Rangeland Soil Quality--Introduction USDA, Natural Resources of the soil, the vegetation, the water, and the air as well as the ecological processes of the rangeland ecosystem are balanced and sustained. What is soil? Soil is a dynamic resource that supports plants

188

Soil Horizons Some Noteworthy Soil Science in Wisconsin  

E-Print Network [OSTI]

Soil Horizons Some Noteworthy Soil Science in Wisconsin Alfred E. Hartemink The impact and benefits of soil science have only partly been documented. Here I highlight four noteworthy soil science achievements from the state of Wisconsin that took place between 1870 and the early 1980s: (i) the first soil

Mladenoff, David

189

Remediating pesticide contaminated soils using solvent extraction  

SciTech Connect (OSTI)

Bench-scale solvent extraction studies were performed on soil samples obtained from a Superfund site contaminated with high levels of p,p{prime}-DDT, p,p{prime}-DDE and toxaphene. The effectiveness of the solvent extraction process was assessed using methanol and 2-propanol as solvents over a wide range of operating conditions. It was demonstrated that a six-stage methanol extraction using a solvent-to-soil ratio of 1.6 can decrease pesticide levels in the soil by more than 99% and reduce the volume of material requiring further treatment by 25 times or more. The high solubility of the pesticides in methanol resulted in rapid extraction rates, with the system reaching quasi-equilibrium state in 30 minutes. The extraction efficiency was influenced by the number of extraction stages, the solvent-to-soil ratio, and the soil moisture content. Various methods were investigated to regenerate and recycle the solvent. Evaporation and solvent stripping are low cost and reliable methods for removing high pesticide concentrations from the solvent. For low concentrations, GAC adsorption may be used. Precipitating and filtering pesticides by adding water to the methanol/pesticide solution was not successful when tested with soil extracts. 26 refs., 10 figs., 6 tabs.

Sahle-Demessie, E.; Meckes, M.C.; Richardson, T.L. [National Management Research Lab., Cincinnati, OH (United States)

1996-12-31T23:59:59.000Z

190

Department of Crop and Soil Sciences PhD Graduate Research Assistantship: Soil Science/Soil Quality/Soil Physics  

E-Print Network [OSTI]

Department of Crop and Soil Sciences PhD Graduate Research Assistantship: Soil Science/Soil Quality/Soil Physics Position Summary: Plastic mulches are used in agriculture to conserve water, suppress weeds, and increase soil temperatures. However, plastic mulches need to be disposed off at the end

Flury, Markus

191

Soil solution chemistry of sewage-sludge incinerator ash and phosphate fertilizer amended soil  

SciTech Connect (OSTI)

The chemical composition of the soil provides useful information on the feasibility of amending agricultural land with municipal and industrial waste, because the soil solution is the medium for most soil chemical reactions, the mobile phase in soils, and the medium for mineral adsorption by plant roots. The soil solutions studies in this research were from plots in a 4-yr field experiment conducted to evaluate the effects of the trace metals and P in sewage-sludge incinerator ash. Treatments compared ash with equivalent P rates from triple-superphosphate fertilizer and a control receiving no P application. Ash and phosphate fertilizer were applied annually at rates of 35, 70, and 140 kg citrate-soluble P ha{sup -1}. Cumulative ash applications during 4 yr amounted to 3.6, 7.2, and 14.4 Mg ash ha{sup -1}. Soil solutions were obtained by centrifugation-immiscible liquid displacement using a fluorocarbon displacing agent. Following chemical analysis, a chemical speciation model was used to determine possible solubility-controlling minerals for trace metals and P, and correlations between solution composition and plant uptake were analyzed. 37 refs., 5 tabs.

Bierman, P.M.; Rosen, C.J.; Bloom, P.R.; Nater, E.A. [Univ. of Minnesota, St. Paul, MN (United States)

1995-03-01T23:59:59.000Z

192

NON-DESTRUCTIVE SOIL CARBON ANALYZER.  

SciTech Connect (OSTI)

This report describes the feasibility, calibration, and safety considerations of a non-destructive, in situ, quantitative, volumetric soil carbon analytical method based on inelastic neutron scattering (INS). The method can quantify values as low as 0.018 gC/cc, or about 1.2% carbon by weight with high precision under the instrument's configuration and operating conditions reported here. INS is safe and easy to use, residual soil activation declines to background values in under an hour, and no radiological requirements are needed for transporting the instrument. The labor required to obtain soil-carbon data is about 10-fold less than with other methods, and the instrument offers a nearly instantaneous rate of output of carbon-content values. Furthermore, it has the potential to quantify other elements, particularly nitrogen. New instrumentation was developed in response to a research solicitation from the U.S. Department of Energy (DOE LAB 00-09 Carbon Sequestration Research Program) supporting the Terrestrial Carbon Processes (TCP) program of the Office of Science, Biological and Environmental Research (BER). The solicitation called for developing and demonstrating novel techniques for quantitatively measuring changes in soil carbon. The report includes raw data and analyses of a set of proof-of-concept, double-blind studies to evaluate the INS approach in the first phase of developing the instrument. Managing soils so that they sequester massive amounts of carbon was suggested as a means to mitigate the atmospheric buildup of anthropogenic CO{sub 2}. Quantifying changes in the soils' carbon stocks will be essential to evaluating such schemes and documenting their performance. Current methods for quantifying carbon in soil by excavation and core sampling are invasive, slow, labor-intensive and locally destroy the system being observed. Newly emerging technologies, such as Laser Induced Breakdown Spectroscopy and Near-Infrared Spectroscopy, offer soil-carbon analysis; however, these also are invasive and destructive techniques. The INS approach permits quantification in a relatively large volume of soil without disrupting the measurement site. The technique is very fast and provides nearly instantaneous results thereby reducing the cost, and speeding up the rate of analysis. It also has the potential to cover large areas in a mobile scanning mode. These capabilities will significantly advance the tracking carbon sequestration and offer a tool for research in agronomy, forestry, soil ecology and biogeochemistry.

WIELOPOLSKI,L.MITRA,S.HENDREY,G.ORION,I.ROGERS,H.TORBERT,A.PRIOR,S.RUNION,B.

2004-02-01T23:59:59.000Z

193

Uranyl nitrate-exposed rat alveolar macrophages cell death: Influence of superoxide anion and TNF ? mediators  

SciTech Connect (OSTI)

Uranium compounds are widely used in the nuclear fuel cycle, military and many other diverse industrial processes. Health risks associated with uranium exposure include nephrotoxicity, cancer, respiratory, and immune disorders. Macrophages present in body tissues are the main cell type involved in the internalization of uranium particles. To better understand the pathological effects associated with depleted uranium (DU) inhalation, we examined the metabolic activity, phagocytosis, genotoxicity and inflammation on DU-exposed rat alveolar macrophages (12.5–200 ?M). Stability and dissolution of DU could differ depending on the dissolvent and in turn alter its biological action. We dissolved DU in sodium bicarbonate (NaHCO{sub 3} 100 mM) and in what we consider a more physiological vehicle resembling human internal media: sodium chloride (NaCl 0.9%). We demonstrate that uranyl nitrate in NaCl solubilizes, enters the cell, and elicits its cytotoxic effect similarly to when it is diluted in NaHCO{sub 3}. We show that irrespective of the dissolvent employed, uranyl nitrate impairs cell metabolism, and at low doses induces both phagocytosis and generation of superoxide anion (O{sub 2}{sup ?}). At high doses it provokes the secretion of TNF? and through all the range of doses tested, apoptosis. We herein suggest that at DU low doses O{sub 2}{sup ?} may act as the principal mediator of DNA damage while at higher doses the signaling pathway mediated by O{sub 2}{sup ?} may be blocked, prevailing damage to DNA by the TNF? route. The study of macrophage functions after uranyl nitrate treatment could provide insights into the pathophysiology of uranium?related diseases. -- Highlights: ? Uranyl nitrate effect on cultured macrophages is linked to the doses and independent of its solubility. ? At low doses uranyl nitrate induces generation of superoxide anion. ? At high doses uranyl nitrate provokes secretion of TNF?. ? Uranyl nitrate induces apoptosis through all the range of doses tested.

Orona, N.S. [School of Science and Technology, National University of General Martín, Avda Gral Paz 5445 (1650) San Martín, Buenos Aires (Argentina)] [School of Science and Technology, National University of General Martín, Avda Gral Paz 5445 (1650) San Martín, Buenos Aires (Argentina); Tasat, D.R., E-mail: deborah.tasat@unsam.edu.ar [School of Science and Technology, National University of General Martín, Avda Gral Paz 5445 (1650) San Martín, Buenos Aires (Argentina); School of Dentistry, University of Buenos Aires, M. T. de Alvear 2142 (1122), Buenos Aires (Argentina)

2012-06-15T23:59:59.000Z

194

Soil and Water Conservation (Virginia)  

Broader source: Energy.gov [DOE]

Soil and water conservation districts (SWCDs) were established in the 1930s to develop comprehensive programs and plans to conserve soil resources, control and prevent soil erosion, prevent floods...

195

Soil and Water Conservation (Texas)  

Broader source: Energy.gov [DOE]

The Texas State Soil and Water Conservation Board is established to encourage and oversee soil-conserving land-use practices, and to provide for the conservation of soil and related resources and...

196

Soil metagenomics and carbon cycling  

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

Soil metagenomics and carbon cycling Soil metagenomics and carbon cycling Establishing a foundational understanding of the microbial and ecosystem factors that control carbon...

197

Soil and Water Conservation (Indiana)  

Broader source: Energy.gov [DOE]

The Indiana Association of Soil and Water Conservation Districts is an association of the 92 soil and water conservation districts, each representing one of the 92 Indiana counties.

198

Soil Conservation Districts Law (Iowa)  

Broader source: Energy.gov [DOE]

This legislation establishes a soil and water conservation division within the Iowa Department of Agriculture, as well as local soil and water conservation districts. The regulations accompanying...

199

Crystal chemistry of new thorium nitrates and chromates  

SciTech Connect (OSTI)

The structures and infrared spectra of six novel thorium compounds are reported. Th(NO{sub 3}){sub 2}(OH){sub 2}(H{sub 2}O){sub 2} (1) crystallizes in space group C2/c, a=14.050(1), b=8.992(7), c=5.954(5) Å, ?=101.014(2)°. K{sub 2}Th(NO{sub 3}){sub 6} (2), P-3, a=13.606(1), c=6.641(6) Å. (C{sub 12}H{sub 28}N){sub 2}Th(NO{sub 3}){sub 6} (3), P21/c, a=14.643(4), b=15.772(5), c=22.316(5) Å, ?=131.01(1)°. KTh(NO{sub 3}){sub 5}(H{sub 2}O){sub 2} (4), P21/c, a=10.070(8), b=12.731(9), c=13.231(8) Å, ?=128.647(4)°. Th(CrO{sub 4}){sub 2}(H{sub 2}O){sub 2} (5), P21/n, a=12.731(1), b=9.469(8), c=12.972(1) Å, ?=91.793(2)°. K{sub 2}Th{sub 3}(CrO{sub 4}){sub 7}(H{sub 2}O){sub 10} (6), Ama2, a=19.302(8), b=15.580(6), c=11.318(6) Å. The coordination polyhedra about Th in these structures are diverse. Th is coordinated by 9 O atoms in 5 and 6, seven of which are from monodentate (CrO{sub 4}) tetrahedra and two are (H{sub 2}O). The Th in compound 1 is coordinated by ten O atoms, four of which are O atoms of two bidentate (NO{sub 3}) triangles and six of which are (OH) and (H{sub 2}O). In compounds 2, 3 and 4 the Th is coordinate by 12 O atoms. In 2 and 3 there are six bidentate (NO{sub 3}) triangles, and in 4 ten of the O atoms are part of five bidentate (NO{sub 3}) triangles and the others are (H{sub 2}O) groups. The structural units of these compounds consist of a chain of thorium and nitrate polyhedra (1), isolated thorium hexanitrate clusters (2, 3), an isolated thorium pentanitrate dihydrate cluster (4), and a sheet (6) and framework (5) of thorium and chromate polyhedra. These structures illustrate the complexity inherent in the crystal chemistry of Th.

Sigmon, Ginger E.; Burns, Peter C

2010-01-01T23:59:59.000Z

200

On-Farm Soil Monitoring for Water  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Soil quality and soil management resources the air which helps build soil organic matter and tilth, and sustains the soil resource for future generations and other species. Improving and protecting soil quality can help support sustainable crop

Holland, Jeffrey

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


201

Soil Quality Information Sheet Rangeland Soil Quality--  

E-Print Network [OSTI]

roots, rills, gullies, wind scours, and soil deposition reflect such processes as runoff and erosion. Waterflow patterns X X 3. Pedestals and/or terracettes X X 4. Bare ground X X 5. Gullies X X 6. Wind. Compaction layer X X X 12. Functional/structural groups X 13. Plant mortality/ decadence X 14. Litter amount

202

Unusual persistence of DDT in some western USA soils  

SciTech Connect (OSTI)

Agricultural use of DDT (1,1,1-trichloro-2,2,2-bis (p-chlorophenyl) ethane) was canceled in 1972. By the late 1970's and early 1980's, the National Soils Monitoring Program of the US Environmental Protection Agency (EPA) was consistently finding higher soil residues of the degradate DDE (1,1-dichloro 2,2-bis (p-chlorophenyl) ethylene) than of parent DDT. Similarly, the US Fish and Wildlife Service (FWS) had been finding during the late 1970's that DDT and related compounds had been decreasing in birds throughout the US. During 1984 and 1985, the EPA and the agriculture departments of Texas and New Mexico, in response to the FWS, conducted soil sampling in 13 areas where contaminated birds had been collected. It was agreed that soil samples containing higher levels of DDT than DDE would serve as a possible indicator of illegal DDT use. This was an intensive soil sampling program; over 236 fields were sampled. A controversy developed as to whether high ratios of DDT and DDE might corroborate the accusations of recent illegal use of DDT products. Dell City area soils containing higher levels of DDT than of DDE became classified as suspicious soils. Soils bearing the expected higher level of DDE were dubbed as normal. To resolve the controversy, the authors, in 1989, conducted a DDT soil metabolism study with representative samples of the suspicious and normal soils. It was felt that a soil metabolism study could, once and for all, determine if there was, indeed, something unusual about the rate at which the suspicious soils degrade DDT.

Hitch, R.K.; Day, H.R. (Environmental Protection Agency, Washington, DC (United States))

1992-02-01T23:59:59.000Z

203

Natural and Enhanced Attenuation of Soil and Groundwater at the Monument Valley, Arizona, DOE Legacy Waste Site—10281  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE), the Navajo Nation, and the University of Arizona are exploring natural and enhanced attenuation remedies for groundwater contamination at a former uranium-ore processing site near Monument Valley, Arizona. DOE removed radioactive tailings from the Monument Valley site in 1994. Nitrate and ammonium, waste products of the milling process, remain in an alluvial groundwater plume spreading from the soil source where tailings were removed. Planting and irrigating two native shrubs, fourwing saltbush and black greasewood, markedly reduced both nitrate and ammonium in the source area over an 8-year period. Total nitrogen dropped from 350 mg/kg in 2000 to less than 200 mg/kg in 2008. Most of the reduction is attributable to irrigation-enhanced microbial denitrification rather than plant uptake. However, soil moisture and percolation flux monitoring show that the plantings control the soil water balance in the source area, preventing additional leaching of nitrogen compounds. Enhanced denitrification and phytoremediation also look promising for plume remediation. Microcosm experiments, nitrogen isotopic fractionation analysis, and solute transport modeling results suggest that (1) up to 70 percent of nitrate in the plume has been lost through natural denitrification since the mill was closed in 1968, and (2) injection of ethanol may accelerate microbial denitrification in plume hot spots. A field-scale ethanol injection pilot study is underway. Landscape-scale remote sensing methods developed for the project suggest that transpiration from restored native phreatophyte populations rooted in the aquifer could limit further expansion of the plume. An evaluation of landfarm phytoremediation, the irrigation of native shrub plantings with high nitrate water pumped from the alluvial aquifer, is also underway.

Waugh, W.J. [S.M. Stoller Corporation, Grand Junction, CO; Miller, D.E. [S.M. Stoller Corporation, Grand Junction, CO; Morris, S.A. [S.M. Stoller Corporation, Grand Junction, CO; Sheader, L.R. [S.M. Stoller Corporation, Grand Junction, CO; Glenn, E.P. [University of Arizona, Tucson, AZ; Moore, D. [University of Arizona, Tucson, AZ; Carroll, K.C. [University of Arizona, Tucson, AZ; Benally, L. [Navajo Nation, Window Rock, AZ; Roanhorse, M. [Navajo Nation, Window Rock, AZ; Bush, R.P. [U.S. Department of Energy, Grand Junction, CO; none,

2010-03-07T23:59:59.000Z

204

Low time resolution analysis of polar ice cores cannot detect impulsive nitrate events  

E-Print Network [OSTI]

Ice cores are archives of climate change and possibly large solar proton events (SPEs). Wolff et al. (2012) used a single event, a nitrate peak in the GISP2-H core, which McCracken et al. (2001a) time associated with the poorly quantified 1859 Carrington event, to discredit SPE-produced, impulsive nitrate deposition in polar ice. This is not the ideal test case. We critique the Wolff et al. analysis and demonstrate that the data they used cannot detect impulsive nitrate events because of resolution limitations. We suggest re-examination of the top of the Greenland ice sheet at key intervals over the last two millennia with attention to fine resolution and replicate sampling of multiple species. This will allow further insight into polar depositional processes on a sub-seasonal scale, including atmospheric sources, transport mechanisms to the ice sheet, post-depositional interactions, and a potential SPE association.

Smart, D F; Melott, A L; Laird, C M

2015-01-01T23:59:59.000Z

205

Soils in the Riparian Incorporating Soil Dynamics into  

E-Print Network [OSTI]

deposits or upland slope wash · Soil particle size reflect the energy (velocity) of depositionalSoils in the Riparian Complex Incorporating Soil Dynamics into Ecological Site Descriptions Kenneth F. Scheffe, SSS August 16, 2007 #12;Water Changes Everything · Water is the trump card over soils

206

Soil Quality Information Sheet Rangeland Soil Quality--Compaction  

E-Print Network [OSTI]

Soil Quality Information Sheet Rangeland Soil Quality--Compaction USDA, Natural Resources Conservation Service May 2001 Rangeland Sheet 4 What is compaction? Soil compaction occurs when moist or wet soil aggregates are pressed together and the pore space between them is reduced. Compaction changes

207

Soil Quality Information Sheet Rangeland Soil Quality--Wind Erosion  

E-Print Network [OSTI]

Soil Quality Information Sheet Rangeland Soil Quality--Wind Erosion USDA, Natural Resources of the earth's surface by wind. Wind erosion removes and redistributes soil. Small blowout areas may, fence rows, and roadbanks. In many cases the fine soil particles and organic matter are blown offsite

208

Beth Brockett SOIL 502 Soil Quality Analysis -Chemistry Case Study  

E-Print Network [OSTI]

Beth Brockett SOIL 502 Soil Quality Analysis - Chemistry Case Study "Sustainability Street are represented by the Podzolic Order, and more specifically form part of the Bose Soil Management Group) with a limited decomposer community dominated by fungi. Any remnants of native soil at the Sustainability Street

209

Nitrate dynamics in the soil and unconfined aquifer in arid groundwater coupled ecosystems of the Monte desert, Argentina  

E-Print Network [OSTI]

of the Monte desert, Argentina J. N. Aranibar,1,2 P. E. Villagra,1,3 M. L. Gomez,1 E. Jobbágy,4 M. Quiroga,1 R desert, Argentina, J. Geophys. Res., 116, G04015, doi:10.1029/2010JG001618. 1. Introduction [2] Drylands desert, Argentina, shallow groundwater is exploited by deep rooted trees, increasing primary productivity

Nacional de San Luis, Universidad

210

Using Nitrogen and Oxygen Isotope Compositions of Nitrate to Distinguish Contaminant Sources in Hanford Soil and Groundwater  

E-Print Network [OSTI]

stable isotopes at the Hanford Site, WA: Environ. Sci.Contaminant Transport at the Hanford Site, WA: Vadose ZoneRev. 0, Lockheed Martin Hanford Corporation, Richland, WA.

Conrad, Mark

2008-01-01T23:59:59.000Z

211

A search for regulatory mutants of the nitrate utilization pathway of Neurospora Crassa  

E-Print Network [OSTI]

A SEARCH FOR REGULATORI MUTANTS OF THE NITRATE UTILIZATION PATHWAl OF NEUROSPORA CRASSA A Thesis by CLAUDE STEVEN MCDANIEL Submitted to the Graduate College of Texas ARM University in partial fu1fillment of the requirements for the degree... of MASTER OF SCIENCE December 1976 Major Subject: Genetics A SEARCH FOR REGULATORY MUTANTS OF THE NITRATE U1'IIIZA1'ION PA1'NNAY OF ~N A Thesis by CLAUDE STEVEN MCDANIEL Approved as to style and content by: (Chairman of Committ e) (Head oi' epar...

McDaniel, Claude Steven

1976-01-01T23:59:59.000Z

212

CROP & SOIL SCIENCES Irrigation Specialist  

E-Print Network [OSTI]

CROP & SOIL SCIENCES Irrigation Specialist Committee Membership Dr. John Beasley - committee chair Dr. Jared Whitaker Department of Crop & Soil Sciences Department of Crop & Soil Sciences University: (229) 386-7308 Fax: (912) 681-0376 Dr. Robert Carrow Dr. Mark Risse Department of Crop & Soil Sciences

Arnold, Jonathan

213

Digital Soil Mapping: Interactions with  

E-Print Network [OSTI]

Chapter 21 Digital Soil Mapping: Interactions with and Applications for Hydropedology J.A. Thompson,1, * S. Roecker,2 S. Grunwald3 and P.R. Owens4 ABSTRACT Spatial information on soils, particularly hydrologic and hydromorphic soil properties, is used to understand and assess soil water retention, flooding

Grunwald, Sabine

214

CROP & SOIL SCIENCES Quantitative Genomics  

E-Print Network [OSTI]

CROP & SOIL SCIENCES Quantitative Genomics Committee Membership Dr. Scott Jackson - committee chair Dr. Peng-Wah Chee Department of Crop & Soil Sciences Department of Crop & Soil Sciences University of Horticulture Department of Crop & Soil Sciences University of Georgia University of Georgia 2360 Rainwater Rd

Arnold, Jonathan

215

The effect of additions of nitrogen, phosphoric acid and potash on the yield and composition of seabreeze wheat and sweet sudan grass grown on Austin clay soil in the greenhouse  

E-Print Network [OSTI]

his grateful appreciation to the following nsn for the guidance and assistance g5ven during this study' Dr. J, F, Fudge~ Professor~ and Drs C ~ E. Ferguson and L. C. Kapp, kssociate Professors of the Department of kgronosgr; and Professor C. B... and Anderson (20) stated that in the absenoe of potassium plant oells vill elongate but not divide, Nightingale (23) reported that potassium was necessary for nitrate reduction~ and that the rate of nitrate absorption vas ~ lowered with reduced potassium...

Fisher, Flake Leroy

1950-01-01T23:59:59.000Z

216

Morphology of rain water channelization in systematically varied model sandy soils  

E-Print Network [OSTI]

We visualize the formation of fingered flow in dry model sandy soils under different raining conditions using a quasi-2d experimental set-up, and systematically determine the impact of soil grain diameter and surface wetting property on water channelization phenomenon. The model sandy soils we use are random closely-packed glass beads with varied diameters and surface treatments. For hydrophilic sandy soils, our experiments show that rain water infiltrates into a shallow top layer of soil and creates a horizontal water wetting front that grows downward homogeneously until instabilities occur to form fingered flows. For hydrophobic sandy soils, in contrast, we observe that rain water ponds on the top of soil surface until the hydraulic pressure is strong enough to overcome the capillary repellency of soil and create narrow water channels that penetrate the soil packing. Varying the raindrop impinging speed has little influence on water channel formation. However, varying the rain rate causes significant changes in water infiltration depth, water channel width, and water channel separation. At a fixed raining condition, we combine the effects of grain diameter and surface hydrophobicity into a single parameter and determine its influence on water infiltration depth, water channel width, and water channel separation. We also demonstrate the efficiency of several soil water improvement methods that relate to rain water channelization phenomenon, including pre-wetting sandy soils at different level before rainfall, modifying soil surface flatness, and applying superabsorbent hydrogel particles as soil modifiers.

Y. Wei; C. M. Cejas; R. Barrois; R. Dreyfus; D. J. Durian

2014-03-13T23:59:59.000Z

217

Alkyl nitrate (C1-C3) depth profiles in the tropical Pacific Ocean E. E. Dahl,1,2  

E-Print Network [OSTI]

and distribution of tropo- spheric ozone. Atmospheric alkyl nitrates are normally associated with polluted air free radical processes initiated by radioactive decay or cosmic rays, enzymatically mediated reactions expedition in the equatorial Pacific, an equatorial maximum in atmospheric ethyl and isopropyl nitrate

Saltzman, Eric

218

NITRATE UTILIZATION BY PHYTOPLANKTON IN LAKE SUPERIOR IS IMPAIRED BY LOW NUTRIENT (P, Fe) AVAILABILITY AND SEASONAL LIGHT LIMITATION--  

E-Print Network [OSTI]

NITRATE UTILIZATION BY PHYTOPLANKTON IN LAKE SUPERIOR IS IMPAIRED BY LOW NUTRIENT (P, Fe utilization in this oligotrophic system. Clean sampling methods were used to collect water from Lake Superior during spring and summer 2004, and nitrate utilization was measured by monitoring bioreporter

Sterner, Robert W.

219

Isotopic evidence for source changes of nitrate in rain at Bermuda Meredith Galanter Hastings and Daniel M. Sigman  

E-Print Network [OSTI]

), or nitrate (NO3 Ã? ), is a significant contributor to acid rain, an important species in marineIsotopic evidence for source changes of nitrate in rain at Bermuda Meredith Galanter Hastings O is 68.6% and 76.9% (versus Vienna Standard Mean Ocean Water). The few cool season rain events

Sigman, Daniel M.

220

Structural Changes of Bimetallic PdX/Cu (1-X) Nanocatalysts Developed for Nitrate Reduction of Drinking Water  

E-Print Network [OSTI]

of Drinking Water Huiping Xu1,2 , Ray Twesten3 , Kathryn Guy4 , John Shapley4 , Charles Werth5 , Anatoly alternative for nitrate removal in drinking water [1]. Fundamental understanding how the atomic arrangement for the purification of drinking water. INTRODUCTION Presently nitrate in drinking water is either not removed

Frenkel, Anatoly

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


221

Husnjak et al., 2004. Soil inventory and soil classification in Croatia ISRIC World Soil Information Country Series  

E-Print Network [OSTI]

Husnjak et al., 2004. Soil inventory and soil classification in Croatia Page 1 ISRIC World Soil Information Country Series Soil inventory and soil classification in Croatia: historical review, current classification in Croatia Page 2 Summary An historical overview of soil survey and soil classification activities

Rossiter, D G "David"

222

Tree Fertilization Soil Analysis  

E-Print Network [OSTI]

, increase root density, maintain tree health #12;#12;pH ­ effects nutrient availability · Symptoms of high pHTree Fertilization #12;Soil Analysis vs. Foliar Analysis #12;Macronutrients N P K Mg S Ca

223

Soil Erosion (Minnesota)  

Broader source: Energy.gov [DOE]

The Board of Water and Soil Resources has adopted a model ordinance to serve as the minimum standard for local governments, which are asked to implement standards and administrative procedures...

224

Kinetics of Cd Release from Some Contaminated Calcareous Soils  

SciTech Connect (OSTI)

Contamination of soils with heavy metals may pose long-term risk to groundwater quality leading to health implications. Bioavailability of heavy metals, like cadmium (Cd) is strongly affected by sorption and desorption processes. The release of heavy metals from contaminated soils is a major contamination risks to natural waters. The release of Cd from contaminated soils is strongly influenced by its mobility and bioavailability. In this study, the kinetics of Cd desorption from ten samples of contaminated calcareous soils, with widely varying physicochemical properties, were studied using 0.01 M EDTA extraction. The median percentage of Cd released was about 27.7% of the total extractable Cd in the soils. The release of Cd was characterized by an initial fast release rate (of labile fractions) followed by a slower release rate (of less labile fractions) and a model of two first-order reactions adequately describes the observed release of Cd from the studied soil samples. There was positive correlation between the amount of Cd released at first phase of release and Cd in exchangeable fraction, indicating that this fraction of Cd is the main fraction controlling the Cd in the kinetic experiments. There was strongly negative correlation between the amount of Cd released at first and second phases of release and residual fraction, suggesting that this fraction did not contribute in Cd release in the kinetic experiments. The results can be used to provide information for evaluation of Cd potential toxicity and ecological risk from contaminated calcareous soils.

Sajadi Tabar, S.; Jalali, M., E-mail: jalali@basu.ac.ir [Bu-Ali Sina University, Department of Soil Science, College of Agriculture (Iran, Islamic Republic of)

2013-03-15T23:59:59.000Z

225

Saving our soils  

E-Print Network [OSTI]

when we consider how important the world’s soils are to human civilization. Within the next several decades, about 9–10 billion people will increasingly require food, timber, fiber, and bioenergy, as well as related ecosystem ser- vices... producers, motivated by short-term finances, increase inputs of fertilizers and pesticides to maximize yields, frequently with adverse environmental impacts. Subsistence farmers coax decreasing crop yields from soils that can no longer be managed sustainably...

Grandy, A. Stuart; Billings, Sharon A.; Richter Dan

2010-05-01T23:59:59.000Z

226

Application of a modified denitrifying bacteria method for analyzing groundwater and vadose zone pore water nitrate at the Hanford Site, WA, USA.  

E-Print Network [OSTI]

zone pore water nitrate at the Hanford Site, WA, USA. Woods,and Conrad, Mark The Hanford Site in southern WashingtonL have been reported for Hanford groundwaters, where nitrate

Woods, Katharine N.; Singleton, Michael J.; Conrad, Mark

2003-01-01T23:59:59.000Z

227

Soil Biology & Biochemistry 38 (2006) 22922299 Modifications of degradation-resistant soil organic matter by soil  

E-Print Network [OSTI]

Soil Biology & Biochemistry 38 (2006) 2292­2299 Modifications of degradation-resistant soil organic matter by soil saprobic microfungi Veronika R eza´ c ova´ a,b,Ã, Hana Hrs elova´ a , Hana Gryndlerova in their solutions and in sterile soil by microfungal species and two well-known HA degraders were studied

Miksik, Ivan

2006-01-01T23:59:59.000Z

228

Chlorite Dissolution Rates  

SciTech Connect (OSTI)

Spreadsheets provides measured chlorite rate data from 100 to 300C at elevated CO2. Spreadsheet includes derived rate equation.

Carroll, Susan

2013-07-01T23:59:59.000Z

229

Chlorite Dissolution Rates  

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

Spreadsheets provides measured chlorite rate data from 100 to 300C at elevated CO2. Spreadsheet includes derived rate equation.

Carroll, Susan

230

The Interest Rate Conundrum  

E-Print Network [OSTI]

Flows and US Interest Rates,” NBER Working Paper No 12560. [Working Paper # 2008 -03 The Interest Rate Conundrum Roger

Craine, Roger; Martin, Vance L.

2009-01-01T23:59:59.000Z

231

Gas/particle partitioning of total alkyl nitrates observed with TD-LIF in Bakersfield  

E-Print Network [OSTI]

total AN (gas + aerosol) and ANaer show that on average 21% of ANs are in the condensed phaseGas/particle partitioning of total alkyl nitrates observed with TD-LIF in Bakersfield A. W. Rollins samples. These measurements show that ANs are a ubiquitous component of the OA with the ­ONO2 subunit

Cohen, Ronald C.

232

Effect of nitrate on the performance of single chamber air cathode microbial fuel cells  

E-Print Network [OSTI]

Effect of nitrate on the performance of single chamber air cathode microbial fuel cells Chontisa Accepted 26 August 2008 Published online 11 September 2008 Keywords: Microbial fuel cell Denitrification microbial fuel cells (MFCs) has drawn much attention recently as a new approach of waste- water treatment

Tullos, Desiree

233

Nitrogen sources and cycling in the San Francisco Bay Estuary: A nitrate dual isotopic composition approach  

E-Print Network [OSTI]

as 25.0%) at the Sacramento­San Joaquin River delta region give rise to a wide range of d18ONO3 valuesNitrogen sources and cycling in the San Francisco Bay Estuary: A nitrate dual isotopic composition18O) within the estuarine system of San Francisco (SF) Bay, California, to explore the utility

Paytan, Adina

234

Materials Chemistry and Physics 100 (2006) 3840 X-ray irradiation induced degradation of cellulose nitrate  

E-Print Network [OSTI]

Abstract Energy-dispersive X-ray fluorescence (EDXRF) spectrometry was previously proposed to measure energy-dispersive X-ray fluorescence (EDXRF) spectrometry. For that method, a reference silver nitrate-ray energy is high enough to avoid total a

Yu, K.N.

235

Alkyl nitrate (C 1 -C 3 ) depth profiles in the tropical Pacific Ocean  

E-Print Network [OSTI]

concentrations with a [ iPr]/[Et] ratio of 0.1±0.0. Noat all depths with an [iPr]/[Et] ratio of 0.2 ± 0.0. Thiswith ethyl nitrate with an [iPr]/[Et] ratio of 0.2 ± 0.0.

Dahl, E. E; Yvon-Lewis, S. A; Saltzman, E. S

2007-01-01T23:59:59.000Z

236

Nitrate and colloid transport through coarse Hanford sediments under steady state, variably saturated flow  

E-Print Network [OSTI]

Nitrate and colloid transport through coarse Hanford sediments under steady state, variably] At the U.S. Department of Energy's Hanford Reservation, colloid-facilitated transport is a potential of colloids through Hanford sediments under steady state, unsaturated flow conditions. We isolated colloids

Flury, Markus

237

Water and nitrate exchange between cultivated ecosystems and groundwater in the Rolling Pampas  

E-Print Network [OSTI]

model (UPFLOW) suggested that at TS groundwater supplied an importanWater and nitrate exchange between cultivated ecosystems and groundwater in the Rolling Pampas Agropecuaria Parana´, INTA, Ruta 11 km 12.5, 3101 Oro Verde, Argentina 1. Introduction Biogeochemical exchange

Nacional de San Luis, Universidad

238

Combined Effects of UV-B, Nitrate, and Low pH Reduce the Survival and Activity Level of Larval Cascades Frogs (Rana cascadae)  

E-Print Network [OSTI]

Combined Effects of UV-B, Nitrate, and Low pH Reduce the Survival and Activity Level of Larval. We investigated interactions between low pH, high nitrate level, and ultraviolet-B (UV-B) light were significantly reduced in the treatment with low pH, high nitrate, and UV-B together. In both years

Blaustein, Andrew R.

239

Crop and Soil Science Degree Checklist Name: ____________________________  

E-Print Network [OSTI]

and Soil Science Degree Checklist Name: ____________________________ ID Intensive (SOIL 325) (3) _______ HHS 231 ­ Lifetime Fitness for Health (2. Global Issues (3) (*soil science electives meeting requirement) _______ Science

Grünwald, Niklaus J.

240

Demonstration, testing, and evaluation of in situ heating of soil. Volume 1, Final report  

SciTech Connect (OSTI)

This document is a final reports in two volumes. Volume I contains the technical report and Volume II contains appendices with background information and data. In this project approximately 300 cubic yards of clayey soil containing a low concentration plume of volatile organic chemicals was heated in situ by the application of electrical energy. It was shown that as a result of heating the effective permeability of soil to air flow was increased such that in situ soil vapor extraction could be performed. The initial permeability of soil was so low that the soil gas flow rate was immeasurably small even at high vacuum levels. It was demonstrated that the mass flow rate of the volatile organic chemicals was enhanced in the recovered soil gas as a result of heating.

Dev, H.; Enk, J.; Jones, D.; Sabato, W.

1996-04-05T23:59:59.000Z

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


241

Combined effects of short-term rainfall patterns and soil texture on nitrogen cycling -- A Modeling Analysis  

SciTech Connect (OSTI)

Precipitation variability and magnitude are expected to change in many parts of the world over the 21st century. We examined the potential effects of intra-annual rainfall patterns on soil nitrogen (N) transport and transformation in the unsaturated soil zone using a deterministic dynamic modeling approach. The model (TOUGHREACT-N), which has been tested and applied in several experimental and observational systems, mechanistically accounts for microbial activity, soil-moisture dynamics that respond to precipitation variability, and gaseous and aqueous tracer transport in the soil. Here, we further tested and calibrated the model against data from a precipitation variability experiment in a tropical system in Costa Rica. The model was then used to simulate responses of soil moisture, microbial dynamics, nitrogen (N) aqueous and gaseous species, N leaching, and N trace-gas emissions to changes in rainfall patterns; the effect of soil texture was also examined. The temporal variability of nitrate leaching and NO, N{sub 2}, and N{sub 2}O effluxes were significantly influenced by rainfall dynamics. Soil texture combined with rainfall dynamics altered soil moisture dynamics, and consequently regulated soil N responses to precipitation changes. The clay loam soil more effectively buffered water stress during relatively long intervals between precipitation events, particularly after a large rainfall event. Subsequent soil N aqueous and gaseous losses showed either increases or decreases in response to increasing precipitation variability due to complex soil moisture dynamics. For a high rainfall scenario, high precipitation variability resulted in as high as 2.4-, 2.4-, 1.2-, and 13-fold increases in NH{sub 3}, NO, N{sub 2}O and NO{sub 3}{sup -} fluxes, respectively, in clay loam soil. In sandy loam soil, however, NO and N{sub 2}O fluxes decreased by 15% and 28%, respectively, in response to high precipitation variability. Our results demonstrate that soil N cycling responses to increasing precipitation variability depends on precipitation amount and soil texture, and that accurate prediction of future N cycling and gas effluxes requires models with relatively sophisticated representation of the relevant processes.

Gu, C.; Riley, W.J.

2009-11-01T23:59:59.000Z

242

The influence of chloride ions on the corrosion of copper in soil  

E-Print Network [OSTI]

work the influence of chloride ions upon corrosion behavior of copper in soil has been studied. Open circuit potential, linear polarization and overvoltage data were used to obtain a history of the instantaneous corrosion rate of copper in soil..., evidence exists that pitting corrosion of copper is intensified in the presence of chloride ions. The primary objective of this study was to determine quantitatively the influence of chloride ions upon the corrosion of copper in soil. Instantaneous...

Hirani, Raju K

1980-01-01T23:59:59.000Z

243

Remote Sensing of Soils, Minerals, and Geomorphology  

E-Print Network [OSTI]

,Remote Sensing of Soils, Minerals, and GeomorphologyMinerals, and Geomorphology · Soil is unconsolidated material). ·· SoilSoil is unconsolidated material at the surface of the Earth thatis unconsolidated material

244

1 INTRODUCTION Researches in unsaturated soil mechanics  

E-Print Network [OSTI]

1 INTRODUCTION Researches in unsaturated soil mechanics considerably developed in the past decades exchanges during shearing were also monitored, and Experimental unsaturated soil mechanics Pierre Delage- mechanical behaviour of unsaturated soils are presented. The water retention properties of unsaturated soils

Paris-Sud XI, Université de

245

soils.ifas.ufl.edu Soil & Water Science Department  

E-Print Network [OSTI]

interested in courses that emphasize sustainability, resource management, valuation of ecosystem servicessoils.ifas.ufl.edu UF/IFAS Soil & Water Science Department DISTANCE EDUCATION GRADUATE PROGRAMS #12;SOIL AND WATER SCIENCE DEPARTMENT The Soil and Water Science Department at the University of Florida

Watson, Craig A.

246

1,4818 pour le nitrate d'uranyle). Les diffrents m-langes prsentaient sensiblement la mme densit.  

E-Print Network [OSTI]

434 1,4818 pour le nitrate d'uranyle). Les différents mé- langes présentaient sensiblement la mème pour des solutions de nitrate d'uranyle dont la densité a été reliée au moyen de chlorure ferrique nitrate d'uranyle sans chlorure fer- rique. En résumé, la mesure précise de l'activité des so- lutions de

Paris-Sud XI, Université de

247

Economic Optimum Rates and Returns from Nitrogen Fertilization of Coastal Bermudagrass for Hay in East Texas.  

E-Print Network [OSTI]

BULLETIN THE TEXAS AGRICULTURAL EXPERIMENT STATION1 J. E. Miller, Director/ Texas A&M University/ College Station, f exas B-1151 May 1975 ECONOMIC OPTIMUM RATES AND RETURNS FROM NITROGEN FERTILIZATION OF COASTAL BERMUDAGRASS FOR HAY IN EAST... at the Texas A&M University Agricultural Research and Extension Center at Overton. The 5-year study compared urea, ammoniutn nitrate, ammonium sulfate and two nitrogen experimental con- trolled-release materials (sulfur-coated ureas) on a rela- tively deep...

Matocha, J. E.

1975-01-01T23:59:59.000Z

248

Soil and Water Conservation (Florida)  

Broader source: Energy.gov [DOE]

Florida’s 62 Soil and Water Conservation Districts were established in 1937 under Chapter 582 Florida Statutes. The law was based on federal model legislation to establish Soil and Water...

249

Residential construction on expansive soils  

E-Print Network [OSTI]

Residences founded on expansive soils experience billions of dollars each year in damage caused by the heaving and shrinking of the foundation soils. It is thought that stiffening the foundation, while increasing the cost of the home, will save...

Phipps, James Frederick

1993-01-01T23:59:59.000Z

250

Structure and Function of Metal- and Nitrate-reducing Microbial Communities in the FRC Subsurface  

SciTech Connect (OSTI)

The overall goal of this study is to evaluate structure-function relationships of sedimentary microbial communities likely to regulate U(VI) reduction and immobilization in the subsurface of Area 2 at the Field Research Center (FRC), Oak Ridge, TN. Microcosm experiments were conducted under near in situ conditions with FRC subsurface materials cocontaminated with high levels of U(VI) and nitrate. The activity, abundance, and community composition of microorganisms was determined in microcosm samples, stimulated with ethanol or glucose, and compared to those from sediment cores and unamended controls. Activity was assessed by monitoring terminal electron accepting processes (TEAPs; nitrate, sulfate, uranium, and iron reduction) as well as electron donor utilization. Microbial functional groups, nitrate- and iron(III)-reducing bacteria, were enumerated during the nitrate- and metal-reduction phases of the incubation and in sediment core samples using a most probable number (MPN) serial dilution assay. U(VI) and Fe(III) were reduced concurrently in the glucose but not the ethanol treatments. In ethanol-amended microcosms, U(VI) was reduced during a 4-day lag phase between nitrate- and Fe(III)-reduction phases. Biostimulation resulted in 3 to 5 orders of magnitude higher counts of Fe(III)-reducing bacteria, whereas populations of nitrate-reducers were enhanced by 1 to 3 orders of magnitude. One to 2 orders of magnitude more Fe(III)-reducers were observed in ethanol- as compared to glucose-amended treatments in parallel with enhanced U(VI) removal in ethanol treatments. Cultivatable Fe(III)-reducing bacteria in the ethanol treatments were dominated by Geobacter sp. while those cultured on glucose were dominated by fermentative organisms, i.e., Tolumonas sp. Currently, carbon substrate utilization is being examined through HPLC analysis of microcosm porewaters. In addition, changes in the overall microbial community composition are being assessed using cultivation-independent techniques, including fluorescence in situ hybridization (FISH), terminal restriction fragment length polymorphism analysis (T-RFLP) and cloning/sequencing of structural and functional genes. Our results indicate that the microbially-catalyzed mechanism of U(VI) reduction is electron donor dependent and that more effective U(VI) removal is achieved in parallel with an enrichment of Geobacter sp. upon treatment with ethanol.

Akob, Denise M.; Mills, Heath J.; Kerkhof, Lee; Gihring, Thomas M.; Kostk, Joel E.

2006-04-05T23:59:59.000Z

251

Miamisburg Environmental Management Project Archived Soil & Groundwate...  

Office of Environmental Management (EM)

Miamisburg Environmental Management Project Archived Soil & Groundwater Master Reports Miamisburg Environmental Management Project Archived Soil & Groundwater Master Reports...

252

Fernald Environmental Management Project Archived Soil & Groundwater...  

Office of Environmental Management (EM)

Fernald Environmental Management Project Archived Soil & Groundwater Master Reports Fernald Environmental Management Project Archived Soil & Groundwater Master Reports Fernald...

253

Intergrating Magnetotellurics, Soil Gas Geochemistry and Structural...  

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

Intergrating Magnetotellurics, Soil Gas Geochemistry and Structural Analysis to Identify Hidden, High Enthalpy, Extensional Geothermal Systems Intergrating Magnetotellurics, Soil...

254

Biodegradation of jet fuel in vented columns of water-unsaturated sandy soil. Master's thesis  

SciTech Connect (OSTI)

The effect of soil water content on the rate of jet fuel (JP-4) biodegradation in air-vented, water-unsaturated columns of sandy soil was investigated. The contaminated soil was obtained from a spill site located on Tyndall AFB, Fla. The initial soil loading was 4590 mg of JP-4/kg of dry soil. Three laboratory columns were packed with the contaminated soil, saturated and drained for periods of 81-89 days. Two columns were continuously vented with air, and the third, intended to provide an anaerobic control, was vented with nitrogen. The venting gas flows were maintained between 1 and 2.5 soil pore volume changeouts per day. The total JP-4 removal in the air-vented columns averaged 44% of the mass originally present. Biodegradation and volatilization accounted for 93% and 7% of the total removal, respectively. A maximum biodegradation rate of 14.3 mg of JP-4/kg of moist soil per day was observed at a soil water content of approximately 72% saturation. Soil drainage characteristics indicated that this water content may have corresponded to 100% of the in situ field capacity water content. Theses.

Coho, J.W.

1990-01-01T23:59:59.000Z

255

Effective Rate Period  

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

of the FY Mid-Year Change 10012013 - 03312014 04012014 - 09302014 Power Rates Annual Revenue Requirement Rate Schedule Power Revenue Requirement 73,441,557...

256

GUIDE TO GRADUATE SOIL SCIENCE  

E-Print Network [OSTI]

GUIDE TO GRADUATE PROGRAMS in AGRONOMY and SOIL SCIENCE Updated July 2011 THE DEPARTMENT OF CROP AND SOIL SCIENCES THE PENNSYLVANIA STATE UNIVERSITY UNIVERSITY PARK, PA #12;iiii Guide to Graduate Programs in Agronomy and Soil Science Table of Contents Introduction

Guiltinan, Mark

257

5, 95145, 2008 Soil parameter  

E-Print Network [OSTI]

tools to sim- ulate mass and energy fluxes within the soil vegetation atmosphere continuum for nu, linking the water and energy fluxes at the land surface. An appropriate parameterisation of soil hydraulicHESSD 5, 95­145, 2008 Soil parameter inversion ­ potential and limits A. Loew and W. Mauser Title

Paris-Sud XI, Université de

258

LUNAR SOIL SIMULATION TRAFFICABILITY PARAMETERS  

E-Print Network [OSTI]

LUNAR SOIL SIMULATION and TRAFFICABILITY PARAMETERS by W. David Carrier, III Lunar Geotechnical.0 RECOMMENDED LUNAR SOIL TRAFFICABILITY PARAMETERS Table 9.14 in the Lunar Sourcebook (Carrier et al. 1991, p. 529) lists the current recommended lunar soil trafficability parameters: bc = 0.017 N/cm2 bN = 35° K

Rathbun, Julie A.

259

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

E-Print Network [OSTI]

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

Hazen, Terry

260

Aquatic Botany 64 (1999) 381398 Controls on soil cellulose decomposition along a salinity  

E-Print Network [OSTI]

in a Phragmites australis wetland in Denmark Irving A. Mendelssohn a, , Brian K. Sorrellb,1 ,Hans Brix b , Hans tensile strength loss; Physico-chemistry; Nutrients; Soil reduction; Phragmites australis 1. Introduction rates found along environmental gradients. Relative soil decomposition was determined in a Phragmites

Brix, Hans

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


261

Soil Remediation Test  

SciTech Connect (OSTI)

Soils contaminated with petroleum by-products can now be effectively remediated using a variety of technologies. Among these are in-situ bioremediation, land farming, and landfill/replacing of soil. The range of efficiencies and cost effectiveness of these technologies has been well documented. Exsorbet Plus is showing promise as an in-situ bioremediation agent. It is made of naturally grown Spaghnum Peat Moss which has been activated for encapsulation and blended with nitrogen-rich fertilizer. In its initial field test in Caracas, Venezuela, it was able to remediate crude oil-contaminated soil in 90 days at less than half of the cost of competing technologies. Waste Solutions, Corp and the US Department of Energy signed a Cooperative Research and Development Agreement to test Exsorbet Plus at the Rocky Mountain Oilfield Testing Center near Casper, Wyoming. As part of the test, soil contaminated with crude oil was treated with Exsorbet Plus to aid the in-situ bioremediation process. Quantitative total petroleum hydrocarbon (TPH) measurements were acquired comparing the performance of Exsorbet Plus with an adjacent plot undergoing unaided in-situ bioremediation.

Manlapig, D. M.; Williamsws

2002-04-01T23:59:59.000Z

262

Summary of aluminum nitrate tests at the F/H-ETF  

SciTech Connect (OSTI)

Biofouling of the Norton ceramic filters in the F/H Effluent Treatment Facility (ETF) has been minimized by bacterial control strategies on the influent streams. However, enough bacteria still exists in the routine influent to impact the filter performance. One method of remediating biofouling in routine influent, initially observed in laboratory tests on simulant solutions, involves addition of aluminum nitrate to the influent wastewater. Tests on actual feed at the ETF using aluminum nitrate showed significantly improved performance, with increases in filter permeability of up to four-fold compared to the baseline case. These improvements were only realized after modifications to the pH adjustment system were completed which minimized upsets in the pH of the feed solutions.

McCabe, D.J.; Wiggins, A.W.

1992-01-01T23:59:59.000Z

263

Summary of aluminum nitrate tests at the F/H-ETF  

SciTech Connect (OSTI)

Biofouling of the Norton ceramic filters in the F/H Effluent Treatment Facility (ETF) has been minimized by bacterial control strategies on the influent streams. However, enough bacteria still exists in the routine influent to impact the filter performance. One method of remediating biofouling in routine influent, initially observed in laboratory tests on simulant solutions, involves addition of aluminum nitrate to the influent wastewater. Tests on actual feed at the ETF using aluminum nitrate showed significantly improved performance, with increases in filter permeability of up to four-fold compared to the baseline case. These improvements were only realized after modifications to the pH adjustment system were completed which minimized upsets in the pH of the feed solutions.

McCabe, D.J.; Wiggins, A.W.

1992-05-01T23:59:59.000Z

264

The effect of penetration factor, deposition, and environmental factors on the indoor concentration of PM2.5 sulfate, nitrate, and carbon  

SciTech Connect (OSTI)

Indoor exposure to particles of outdoor origin constitutes an important exposure pathway. We conducted an intensive set of indoor particle measurements in an unoccupied house under differing operating conditions. Real-time measurements were conducted both indoors and outdoors, including PM2.5 nitrate, sulfate, and carbon. Because the time-scale of the fluctuations in outdoor particle concentrations and meteorological conditions are often similar to the time constant for building air exchange, a steady state concentration may never be reached. The time-series experimental data were used to determine the effect of changes in air exchange rate and indoor/outdoor temperature and relative humidity differences on indoor particle concentrations. A multivariate regression was performed to investigate the difference between measured indoor concentrations and results from a simple time-dependent physical model. Environmental conditions had a significant effect on indoor concentrations of all three PM2.5 species, but did not explain all of the model variation.

Thatcher, T.L.; Lunden, M.M.; Sextro, R.G.; Hering, S.; Brown, N.J.

2002-04-15T23:59:59.000Z

265

Impact of pH on the removal of fluoride, nitrate and boron by nanofiltration/reverse osmosis   

E-Print Network [OSTI]

The objective of this study was to evaluate the impact of pH on boron, fluoride, and nitrate retention by comparing modelled speciation predictions with retention using six different nanofiltration (NF) and reverse osmosis ...

Richards, Laura A.; Vuachère, Marion; Schäfer, Andrea

2010-01-01T23:59:59.000Z

266

Model validation and uncertainty analysis -- An example using a nitrate percolation model  

SciTech Connect (OSTI)

Model validation and uncertainty analysis are demonstrated using a model previously developed for estimating nitrate-nitrogen (nitrate) concentrations in percolation water from land application of sewage sludge. The objectives are to demonstrate alternate validation techniques and to analyze uncertainty associated with model use following validation. Field data from three published sludge application studies and two separate methods are used for the validation. The first method, point validation, is accomplished by inserting mean values into the model to make point predictions. Model accuracy is then assessed by calculating coefficient of determination (r{sup 2}), relative error and standard error. Statistical accuracy is tested using the Wilcoxon Signed Rank Test. The second method, statistical validation, uses Monte Carlo simulation to obtain distributions of model predictions. The hypothesis that field data represent reasonable samples from the distribution of model predictions is tested by checking whether observed values are within a range bounded by the 5 and 95% quantities of the distribution. Both validation methods demonstrate that the land application model generally overestimates nitrate concentrations. Monte Carlo simulation is used to identify which model input parameters are the largest contributors to the uncertainty in model predictions.

Mummert, M.C. [R.E. Wright Environmental, Inc., Middletown, PA (United States)

1996-12-31T23:59:59.000Z

267

Aqueous nitrate waste treatment: Technology comparison, cost/benefit, and market analysis  

SciTech Connect (OSTI)

The purpose of this analysis is to provide information necessary for the Department of Energy (DOE) to evaluate the practical utility of the Nitrate to Ammonia and Ceramic or Glass (NAC/NAG/NAX) process, which is under development in the Oak Ridge National Laboratory. The NAC/NACx/NAX process can convert aqueous radioactive nitrate-laden waste to a glass, ceramic, or grout solid waste form. The tasks include, but are not limited to, the following: Identify current commercial technologies to meet hazardous and radiological waste disposal requirements. The technologies may be thermal or non-thermal but must be all inclusive (i.e., must convert a radionuclide-containing nitrate waste with a pH around 12 to a stable form that can be disposed at permitted facilities); evaluate and compare DOE-sponsored vitrification, grouting, and minimum additive waste stabilization projects for life-cycle costs; compare the technologies above with respect to material costs, capital equipment costs, operating costs, and operating efficiencies. For the NAC/NAG/NAX process, assume aluminum reactant is government furnished and ammonia gas may be marketed; compare the identified technologies with respect to frequency of use within DOE for environmental management applications with appropriate rationale for use; Assess the potential size of the DOE market for the NAC/NAG/NAX process; assess and off-gas issues; and compare with international technologies, including life-cycle estimates.

Not Available

1994-01-01T23:59:59.000Z

268

TREATMENT TESTS FOR EX SITU REMOVAL OF CHROMATE & NITRATE & URANIUM (VI) FROM HANFORD (100-HR-3) GROUNDWATER FINAL REPORT  

SciTech Connect (OSTI)

This report describes batch and ion exchange column laboratory scale studies investigating ex situ methods to remove chromate (chromium [VI]), nitrate (NO{sub 3}{sup -}) and uranium (present as uranium [VI]) from contaminated Hanford site groundwaters. The technologies investigated include: chemical precipitation or coprecipitation to remove chromate and uranium; and anion exchange to remove chromate, uranium and nitrate. The technologies investigated were specified in the 100-HR-3 Groundwater Treatability Test Plan. The method suggested for future study is anion exchange.

BECK MA; DUNCAN JB

1994-01-03T23:59:59.000Z

269

E-Print Network 3.0 - acid uranyl nitrate Sample Search Results  

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

cell conditions with uranyl... .1089ees.2006.0009 Soil Humic Acid Decreases Biological Uranium(VI) Reduction by Shewanella putrefaciens CN... the filter. Identical experiments...

270

Relationship Between Soil Moisture Storage and Deep Percolation and Subsurface Return Flow  

E-Print Network [OSTI]

A simulation study was performed to analyze the relationship between the volume of moisture stored in a soil profile and the rate of percolation and subsurface return flow. The simulation study was derived on the basis of the Richards equation...

Nieber, J. L.

271

acid aluminum-rich soils: Topics by E-print Network  

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

incorporated into in situ soil cores at a rate of 350 kg N ha-1 and compared to unamended controls. Microbial properties were determined by microbial biomass N, dehydrogenase...

272

Remote sensing of soil radionuclide fluxes in a tropical ecosystem  

SciTech Connect (OSTI)

We are using a transponding geostationary satellite to collect surface environmental data to describe the fate of soil-borne radionuclides. The remote, former atomic testing grounds at the Eniwetok and Bikini Atolls present a difficult environment in which to collect continuous field data. Our land-based, solar-powered microprocessor and environmental data systems remotely acquire measurements of net and total solar radiation, rain, humidity, temperature, and soil-water potentials. For the past year, our water flux model predicts wet season plant transpiration rates nearly equal to the 6 to 7 mm/d evaporation pan rate, which decreases to 2 to 3 mm/d for the dry season. Radioisotopic analysis confirms the microclimate-estimated 1:3 to 1:20 soil to plant /sup 137/Cs dry matter concentration ratio. This ratio exacerbates the dose to man from intake of food plants. Nephelometer measurements of airborne particulates presently indicate a minimum respiratory radiological dose.

Clegg, B.; Koranda, J.; Robinson, W.; Holladay, G.

1980-11-06T23:59:59.000Z

273

Soil solution chemistry of a fly ash-, poultry litter-, and sewage sludge-amended soil  

SciTech Connect (OSTI)

Mixing coal fly ash (FA) with organic wastes to provide balanced soil amendments offers a potential viable use of this industrial by-product. When such materials are land-applied to supply nutrients for agronomic crops, trace element contaminant solubility must be evaluated. In this study, major and trace element soil solution concentrations arising from application of fly ash, organic wastes, and mixtures of the two were compared in a laboratory incubation. Two fly ashes, broiler poultry litter (PL), municipal sewage sludge (SS), and mixtures of FA with either PL or SS were mixed with a Cecil sandy loam (fine, kaolinitic, thermic Typic Kanhapludult) at rates of 32.3, 8.1, and 16.1 g kg{sup {minus}1} soil for FA, PL, and SS, respectively. Treatments were incubated at 22 C at 17% moisture content and soil solution was periodically extracted by centrifugation over 33 d. Initial soil solution concentrations of As, Mo, Se, and Cu were significantly greater in FA/OL treatments than the respective FA-only treatments. For Cu, increased solution concentrations were attributable to increased loading rates in FA/PL mixtures. Solution Cu concentrations were strongly correlated with dissolved C (R{sup 2} > 0.96) in all PL treatments. Significant interactive effects for solution Mo and Se concentrations were observed for the FA/PL and may have resulted from the increased pH and competing anion concentrations of these treatments. Solution As concentrations showed a significant interactive effect for one FA/PL mixture. For the individual treatments, As was more soluble in the Pl treatment than either FA treatment. Except for soluble Se from on FA/SS mixture, trace element solubility in the FA/SS mixtures was not significantly different than the respective FA-only treatment.

Jackson, B.P.; Miller, W.P.

2000-04-01T23:59:59.000Z

274

Density of Gadolinium Nitrate Solutions for the High Flux Isotope Reactor  

SciTech Connect (OSTI)

In late 1992, the High Flux Isotope Reactor (HFIR) was planning to switch the solution contained in the poison injection tank from cadmium nitrate to gadolinium nitrate. The poison injection system is an emergency system used to shut down the reactor by adding a neutron poison to the cooling water. This system must be able to supply a minimum of 69 pounds of gadolinium to the reactor coolant system in order to guarantee that the reactor would become subcritical. A graph of the density of gadolinium nitrate solutions over a concentration range of 5 to 30 wt% and a temperature range of 15 to 40{sup o}C was prepared. Routine density measurements of the solution in the poison injection tank are made by HFIR personnel, and an adaptation of the original graph is used to determine the gadolinium nitrate concentration. In late 2008, HFIR personnel decided that the heat tracing that was present on the piping for the poison injection system could be removed without any danger of freezing the solution; however, the gadolinium nitrate solution might get as cold as 5{sup o}C. This was outside the range of the current density-concentration correlation, so the range needed to be expanded. This report supplies a new density-concentration correlation that covers the extended temperature range. The correlation is given in new units, which greatly simplifies the calculation that is required to determine the pounds of gadolinium in the tank solution. The procedure for calculating the amount of gadolinium in the HFIR poison injection system is as follows: (1) Calculate the usable volume in the system; (2) Measure the density of the solution; (3) Calculate the gadolinium concentration using the following equation: Gd(lb/ft{sup 3}) = measured density (g/mL) x 34.681 - 34.785; (4) Calculate the amount of gadolinium in the system using the following equation: Amount of Gd(lb) = Gd concentration (lb/ft{sup 3}) x usable volume (ft{sup 3}). The equation in step 3 is exact for a temperature of 5{sup o}C, and overestimates the gadolinium concentration at all higher temperatures. This guarantees that the calculation is conservative, in that the actual concentration will be at least as high as that calculated. If an additional safety factor is desired, it is recommended that an administrative control limit be set that is higher than the required minimum amount of gadolinium.

Taylor, Paul Allen [ORNL; Lee, Denise L [ORNL

2009-05-01T23:59:59.000Z

275

Pneumatic soil removal tool  

DOE Patents [OSTI]

A soil removal tool is provided for removing radioactive soil, rock and other debris from the bottom of an excavation, while permitting the operator to be located outside of a containment for that excavation. The tool includes a fixed jaw, secured to one end of an elongate pipe, which cooperates with a movable jaw pivotably mounted on the pipe. Movement of the movable jaw is controlled by a pneumatic cylinder mounted on the pipe. The actuator rod of the pneumatic cylinder is connected to a collar which is slidably mounted on the pipe and forms part of the pivotable mounting assembly for the movable jaw. Air is supplied to the pneumatic cylinder through a handle connected to the pipe, under the control of an actuator valve mounted on the handle, to provide movement of the movable jaw. 3 figs.

Neuhaus, J.E.

1992-10-13T23:59:59.000Z

276

Pneumatic soil removal tool  

DOE Patents [OSTI]

A soil removal tool is provided for removing radioactive soil, rock and other debris from the bottom of an excavation, while permitting the operator to be located outside of a containment for that excavation. The tool includes a fixed jaw, secured to one end of an elongate pipe, which cooperates with a movable jaw pivotably mounted on the pipe. Movement of the movable jaw is controlled by a pneumatic cylinder mounted on the pipe. The actuator rod of the pneumatic cylinder is connected to a collar which is slidably mounted on the pipe and forms part of the pivotable mounting assembly for the movable jaw. Air is supplied to the pneumatic cylinder through a handle connected to the pipe, under the control of an actuator valve mounted on the handle, to provide movement of the movable jaw.

Neuhaus, John E. (Newport News, VA)

1992-01-01T23:59:59.000Z

277

MOLECULAR APPROACHES FOR IN SITU IDENTIFCIATION OF NITRATE UTILIZATION BY MARINE BACTERIA AND PHYTOPLANKTON  

SciTech Connect (OSTI)

Traditionally, the importance of inorganic nitrogen (N) for the nutrition and growth of marine phytoplankton has been recognized, while inorganic N utilization by bacteria has received less attention. Likewise, organic N has been thought to be important for heterotrophic organisms but not for phytoplankton. However, accumulating evidence suggests that bacteria compete with phytoplankton for nitrate (NO3-) and other N species. The consequences of this competition may have a profound effect on the flux of N, and therefore carbon (C), in ocean margins. Because it has been difficult to differentiate between N uptake by heterotrophic bacterioplankton versus autotrophic phytoplankton, the processes that control N utilization, and the consequences of these competitive interactions, have traditionally been difficult to study. Significant bacterial utilization of DIN may have a profound effect on the flux of N and C in the water column because sinks for dissolved N that do not incorporate inorganic C represent mechanisms that reduce the atmospheric CO2 drawdown via the ?biological pump? and limit the flux of POC from the euphotic zone. This project was active over the period of 1998-2007 with support from the DOE Biotechnology Investigations ? Ocean Margins Program (BI-OMP). Over this period we developed a tool kit of molecular methods (PCR, RT-PCR, Q-PCR, QRT-PCR, and TRFLP) and combined isotope mass spectrometry and flow-cytometric approaches that allow selective isolation, characterization, and study of the diversity and genetic expression (mRNA) of the structural gene responsible for the assimilation of NO3- by heterotrophic bacteria (nasA). As a result of these studies we discovered that bacteria capable of assimilating NO3- are ubiquitous in marine waters, that the nasA gene is expressed in these environments, that heterotrophic bacteria can account for a significant fraction of total DIN uptake in different ocean margin systems, that the expression of nasA is differentially regulated in genetically distinct NO3- assimilating bacteria, and that the best predictors of nasA gene expression are either NO3- concentration or NO3- uptake rates. These studies provide convincing evidence of the importance of bacterial utilization of NO3-, insight into controlling processes, and provide a rich dataset that are being used to develop linked C and N modeling components necessary to evaluate the significance of bacterial DIN utilization to global C cycling. Furthermore, as a result of BI-OMP funding we made exciting strides towards institutionalizing a research and education based collaboration between the Skidaway Institute of Oceanography (SkIO) and Savannah State University (SSU), an historically black university within the University System of Georgia with undergraduate and now graduate programs in marine science. The BI-OMP program, in addition to supporting undergraduate (24) graduate (10) and postdoctoral (2) students, contributed to the development of a new graduate program in Marine Sciences at SSU that remains an important legacy of this project. The long-term goals of these collaborations are to increase the capacity for marine biotechnology research and to increase representation of minorities in marine, environmental and biotechnological sciences.

Frischer, Marc E. [Skidaway Institute of Oceanography; Verity, Peter G.; Gilligan, Mathew R.; Bronk, Deborah A.; Zehr, Jonathan P.; Booth, Melissa G.

2013-09-12T23:59:59.000Z

278

Hydrogen oxidation in soils as a possible toxic-effects indicator  

SciTech Connect (OSTI)

Efficient soil bioassays are needed in a screening array to determine the toxicities of industrial products and wastes. Hydrogen consumption is a common soil microbiological process that we evaluated as a possible soil indicator of toxic effects. Elemental tritium was used as a tracer to determine the H/sub 2/ oxidation rates in soils. The H/sub 2/ bioassay can be completed within 24 h using liquid scintillation counting of the tritium tracer. This test was used to evaluate the effects of known toxic chemicals (e.g., heavy metals, herbicides, and air pollutants), as well as a variety of suspected environmentally harmful compounds (e.g., waste waters, particulates, and sludges from industrial processes) on H/sub 2/ oxidation in soils. This bioassay responded to test compounds at concentrations shown to be toxic in other soil microbiological investigations.

Rogers, R.D. (U.S. EPA, Las Vegas); McFarlane, J.

1982-07-01T23:59:59.000Z

279

Procedures to predict vertical differential soil movement for expansive soils  

E-Print Network [OSTI]

OF TABLES Table Page 1. Soil profile considered in all sample calculations, 2. Gardner's coefficient. 3. Measured suction profile values. 4. Summary of vertical differential soil movements for Appendix C. . . . 50 . . . 54 70 . . . . 74 LIST... OF FIGURES Figure 1. United States map of expansive soils after Wiggins. 2. Center lift distortion mode Page 3. Edge lift distortion mode. 4. The structure of kaolinite (a) atomic structure (b) symbolic structure. . . 5. The structure of serpentine (a...

Naiser, Donald David

1997-01-01T23:59:59.000Z

280

Operation Redwing. Project 2. 52. Neutron-induced soil radioactivity  

SciTech Connect (OSTI)

Soil samples were exposed to neutron radiation from Shot Cherokee to help establish the importance of neutron-induced residual gamma radiation. After exposure and recovery, the samples had no detectable activity because the slant range to the nearest sample was nearly 3.5 miles, due to an error in bomb drop. After this failure, an experiment was designed in the field for Shot Yuma in order that induced-activity data could be obtained for a soil other than Nevada Test Site soil. Samples of sodium, manganese, and coral sand from Site Sally were exposed above and below the surface at a slant range of 120 yards. The difference between the effects of pure fission and fission-fusion neutron spectra on induced activity in soil was not measured, since the soil samples on Shot Cehrokee were not activated. However, a method for predicting neutron-induced gamma-radiation intensities was tested for coral soil on Shot Yuma. Predicted values were within + or - 50% of induced dose rates inferred from field measurements.

Cowan, M.

1985-09-01T23:59:59.000Z

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


281

Compacted Soil Liner Interface Strength Importance  

E-Print Network [OSTI]

Case Study Compacted Soil Liner Interface Strength Importance Timothy D. Stark, F.ASCE1 ; Hangseok interface is not the geomembrane (GM)/compacted low-permeability soil liner (LPSL) but a soil­soil interface placing the cover soil from bottom to top. DOI: 10.1061/(ASCE)GT.1943-5606 .0000556. © 2012 American

282

In-situ vitrification of soil  

DOE Patents [OSTI]

A method of vitrifying soil at or below a soil surface location. Two or more conductive electrodes are inserted into the soil for heating of the soil mass between them to a temperature above its melting temperature. Materials in the soil, such as buried waste, can thereby be effectively immobilized.

Brouns, Richard A. (Kennewick, WA); Buelt, James L. (Richland, WA); Bonner, William F. (Richland, WA)

1983-01-01T23:59:59.000Z

283

CROP & SOIL SCIENCES Water Policy and Management  

E-Print Network [OSTI]

CROP & SOIL SCIENCES Water Policy and Management Committee Membership Dr. David Radcliffe - committee chair Dr. George Vellidis Department of Crop & Soil Sciences Department of Crop & Soil Sciences & Soil Sciences Department of Crop & Soil Sciences University of Georgia University of Georgia Stripling

Arnold, Jonathan

284

The Basicity of Texas Soils.  

E-Print Network [OSTI]

chemical prob- lems connected with the investigations of cotton root rot being made by the Division of Plant Pathology and Physiology. Lab- oratory methods were needed for estimating the amounts of acid or sulphur required to bring experimental soils... approxi- mately to a desired degree of acidity. Information was needed regarding the amounts of acid or sulphur required to make acid various kinds of soil. This Bulletin discusses the basicity of Texas soils, and the amounts of acid or sulphur...

Fraps, G. S. (George Stronach); Carlyle, E. C. (Elmer Cardinal)

1929-01-01T23:59:59.000Z

285

Apparent adsorption and microbial degradation of phenol by soil  

SciTech Connect (OSTI)

The objective of this study was to determine effects of pretreatment, equilibrium time, and concentration on adsorption of the labile organic chemical phenol by two soils: Captina silt loam (Typie Fragiudult) and Palouse silt loam (Ultic Haploxeroll). Adsorption of phenol by soil was determined by radioassay using the batch technique. Since loss from solution is equated with adsorption with the batch method, degradation of phenol is also recorded as adsorption. Adsorption of phenol was low, as evidenced by Freudlich K values of 0.57 and 1.19 for the sterile Captina and Palouse soils, respectively. The addition of water, glucose, or nutrient broth to the non-sterile soil increased the apparent adsorption by reducing the phenol concentration in the solution phase. As equilibration time increased, the apparent adsorption of phenol by the non-sterile soil also increased. When compared with the sterilized soil, this increase suggested that the loss of phenol from solution was largely due to microbial decomposition. As the concentration of phenol increased, there was a corresponding increase in the lag phase and a decrease in the degradation rate constant indicating inhibition and microbial activity by phenol at higher concentrations. The length of time in the lag phase was linearly related to the log of the phenol concentration. At a given concentration, the lag phase of the Captina soil was longer and more sensitive to changes in phenol concentration than was the lag phase in the Palouse soil. This was attributed to its lower phenol adsorption, organic matter content, and initial microbial population.

Scott, H.D.; Wolf, D.C.; Lavy, T.L.

1982-01-01T23:59:59.000Z

286

Soil structure interaction for shrink-swell soils a new design procedure for foundation slabs on shrink-swell soils  

E-Print Network [OSTI]

diffusion soil volume change model starts with proposing a new laboratory test to determine the coefficient of unsaturated diffusivity for intact soils. Then, it introduces the development of a cracked soil diffusion factor, provides a chart for it...

Abdelmalak, Remon Melek

2009-05-15T23:59:59.000Z

287

Plant and Soil VIII, no. 3 March 1957 PROBLEMS OF SOIL TESTING  

E-Print Network [OSTI]

Plant and Soil VIII, no. 3 March 1957 PROBLEMS OF SOIL TESTING ON CALCAREOUS SOILS by DAN H. YAALON The Hebrew University of Jerusalem, Israel Chemically and mineralogically the soils of arid and semiarid of limestone, most of the soils are calcareous. Extensive leaching may have removed the CaCO3 from the soil

Ahmad, Sajjad

288

Original article Soil CO2 efflux in a beech forest: dependence on soil  

E-Print Network [OSTI]

Original article Soil CO2 efflux in a beech forest: dependence on soil temperature and soil water 1998) Abstract - Our objective was to quantify the annual soil carbon efflux in a young beech forest in north-eastern France (Hesse Forest, Euroflux site FR02) from measurements of soil CO, efflux. Soil CO

Paris-Sud XI, Université de

289

Recommended Academic Plan for the Environmental Resource Management -Soil Science Option (E R M/SOIL)  

E-Print Network [OSTI]

Recommended Academic Plan for the Environmental Resource Management - Soil Science Option (E R M/SOIL of Calculus I or MATH 140* (GQ) Calculus With Analytic Geometry I 4 SOILS 101 (GN) Introductory Soil Science 3 AG 150S (First-Year Seminar) Be a Master Student! 2 SOILS 102 Introductory Soil Science Laboratory 1

Omiecinski, Curtis

290

Safe handling of TBP and nitrates in the nuclear process industry  

SciTech Connect (OSTI)

A laboratory and literature study was made of the reactions of tri-n-butyl phosphate (TBP) with nitric acid and nitrates. Its goal was to establish safe conditions for solvent extraction processes involving these chemicals. The damaging explosions at the Tomsk-7 PUREX plant in Russia graphically illustrated the potential hazard involved in such operations. The study has involved a review of prior and contemporary experiments, and new experiments to answer particular questions about these reactions. TBP extracts nitric acid and some metal nitrates from aqueous solutions. The resulting liquid contains both oxidant and reductant, and can react exothermically if heated sufficiently. Safe handling of these potentially reactive materials involves not only limiting the heat generated by the chemical reaction, but also providing adequate heat removal and venting. Specifically, the following recommendations are made to ensure safety: (1) tanks in which TBP-nitrate complexes are or may be present should be adequately vented to avoid pressurization. Data are supplied as a basis for adequacy; (2) chemically degraded TBP, or TBP that has sat a long time in the presence of acids or radiation, should be purified before use in solvent extraction; (3) evaporators in which TBP might be introduced should be operated at a controlled temperature, and their TBP content should be limited; (4) evaporator bottoms that may contain TBP should be cooled under conditions that ensure heat removal. Finally, process design should consider the potential for such reactions, and operators should be made aware of this potential, so that it is considered during training and process operation.

Hyder, M.L.

1994-07-01T23:59:59.000Z

291

Instrument Development and Measurements of the Atmospheric Pollutants Sulfur Dioxide, Nitrate Radical, and Nitrous Acid by Cavity Ring-down Spectroscopy and Cavity Enhanced Absorption Spectroscopy  

E-Print Network [OSTI]

A. , A method of nitrogen dioxide and sulphur dioxidedetermination of nitrogen dioxide and sulfur dioxide in theDOAS) have measured nitrogen dioxide (NO 2 ), nitrate

Medina, David Salvador

2011-01-01T23:59:59.000Z

292

Standard test method for isotopic abundance analysis of uranium hexa?uoride and uranyl nitrate solutions by multi-collector, inductively coupled plasma-mass spectrometry  

E-Print Network [OSTI]

Standard test method for isotopic abundance analysis of uranium hexa?uoride and uranyl nitrate solutions by multi-collector, inductively coupled plasma-mass spectrometry

American Society for Testing and Materials. Philadelphia

2008-01-01T23:59:59.000Z

293

The response of some putting green soil mixtures to compaction  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . , 11 Sand, soil, and peat ratios used in the test . . . . . . 11 Capillay porosity, non-capillary porosity, visual ratings, weight of clippings, hydraulic conductivity, bulk density and total porosity as indicated . . . , . . . 60 Grams of oven dried...-percent-moisture sand-Houston Black clay various tensions retained by cores of concrete soil-peat when sub]ected to 12. 13. Volume-percent-moisture sand-Houston Black clay various tensions Volume-percent-moisture land sand-Houston Black to various tensions...

Howard, Hugh Leon

1959-01-01T23:59:59.000Z

294

Factors affecting total alkaloid and nitrate levels in pearl millet (Pennisetum americanum (L.) Leeke)  

E-Print Network [OSTI]

('gM University Co-Chairmen of Advisory Committee: Dr. Ethan C. Holt Dr. F. M. Roulette, Jr. P l 'lit (P ' t ' (L. )L k)g 'gt d drought stress in the summer of 1978 in East Texas became unpalat- able to grazing cattle. The unpalatable forage contained... as much as 460 ppm total alkaloid and. potentially toxic levels of nitrate (NO ). Several factors which may play a role in the accumula. tion of alkaloids and NO in pearl millet were investigated in these studies. The effect of drought stress, nitrogen...

Krejsa, Beverly Blohowiak

1981-01-01T23:59:59.000Z

295

In-Situ Silver Acetylide Silver Nitrate Explosive Deposition Measurements Using X-Ray Fluorescence.  

SciTech Connect (OSTI)

The Light Initiated High Explosive facility utilized a spray deposited coating of silver acetylide - silver nitrate explosive to impart a mechanical shock into targets of interest. A diagnostic was required to measure the explosive deposition in - situ. An X - ray fluorescence spectrometer was deployed at the facility. A measurement methodology was developed to measure the explosive quantity with sufficient accuracy. Through the use of a tin reference material under the silver based explosive, a field calibration relationship has been developed with a standard deviation of 3.2 % . The effect of the inserted tin material into the experiment configuration has been explored.

Covert, Timothy T.

2014-09-01T23:59:59.000Z

296

Standard test method for isotopic analysis of hydrolyzed uranium hexafluoride and uranyl nitrate solutions by thermal ionization mass spectrometry  

E-Print Network [OSTI]

1.1 This method applies to the determination of isotopic composition in hydrolyzed nuclear grade uranium hexafluoride. It covers isotopic abundance of 235U between 0.1 and 5.0 % mass fraction, abundance of 234U between 0.0055 and 0.05 % mass fraction, and abundance of 236U between 0.0003 and 0.5 % mass fraction. This test method may be applicable to other isotopic abundance providing that corresponding standards are available. 1.2 This test method can apply to uranyl nitrate solutions. This can be achieved either by transforming the uranyl nitrate solution to a uranyl fluoride solution prior to the deposition on the filaments or directly by depositing the uranyl nitrate solution on the filaments. In the latter case, a calibration with uranyl nitrate standards must be performed. 1.3 This test method can also apply to other nuclear grade matrices (for example, uranium oxides) by providing a chemical transformation to uranyl fluoride or uranyl nitrate solution. 1.4 This standard does not purport to address al...

American Society for Testing and Materials. Philadelphia

2005-01-01T23:59:59.000Z

297

Saxton soil remediation project  

SciTech Connect (OSTI)

The Saxton Nuclear Experimental Facility (SNEF) consists of a 23-MW(thermal) pressurized light water thermal reactor located in south central Pennsylvania. The Saxton Nuclear Experimental Corporation (SNEC), a wholly owned subsidiary of the General Public Utilities (GPU) Corporation, is the licensee for the SNEF. Maintenance and decommissioning activities at the site are conducted by GPU Nuclear, also a GPU subsidiary and operator of the Three Mile Island and Oyster Creek nuclear facilities. The remediation and radioactive waste management of contaminated soils is described.

Holmes, R.D. [GPU Nuclear Corporation, Middletown, PA (United States)

1995-12-31T23:59:59.000Z

298

Soil Conservation Districts Law (North Dakota)  

Broader source: Energy.gov [DOE]

This chapter aims to provide for the conservation of the soil and soil resources of this state and for the control and prevention of soil erosion, and to preserve the state's natural resources,...

299

Modeled Impacts of Cover Crops and Vegetative Barriers on Corn Stover Availability and Soil Quality  

SciTech Connect (OSTI)

Environmentally benign, economically viable, and socially acceptable agronomic strategies are needed to launch a sustainable lignocellulosic biofuel industry. Our objective was to demonstrate a landscape planning process that can ensure adequate supplies of corn (Zea mays L.) stover feedstock while protecting and improving soil quality. The Landscape Environmental Assessment Framework (LEAF) was used to develop land use strategies that were then scaled up for five U.S. Corn Belt states (Nebraska, Iowa, Illinois, Indiana, and Minnesota) to illustrate the impact that could be achieved. Our results show an annual sustainable stover supply of 194 million Mg without exceeding soil erosion T values or depleting soil organic carbon [i.e., soil conditioning index (SCI)?>?0] when no-till, winter cover crop, and vegetative barriers were incorporated into the landscape. A second, more rigorous conservation target was set to enhance soil quality while sustainably harvesting stover. By requiring erosion to be <1/2 T and the SCI-organic matter (OM) subfactor to be >?0, the annual sustainable quantity of harvestable stover dropped to148 million Mg. Examining removal rates by state and soil resource showed that soil capability class and slope generally determined the effectiveness of the three conservation practices and the resulting sustainable harvest rate. This emphasizes that sustainable biomass harvest must be based on subfield management decisions to ensure soil resources are conserved or enhanced, while providing sufficient biomass feedstock to support the economic growth of bioenergy enterprises.

Ian J. Bonner; David J. Muth Jr.; Joshua B. Koch; Douglas L. Karlen

2014-06-01T23:59:59.000Z

300

Technical Note Engineering Soils Maps  

E-Print Network [OSTI]

Technical Note Engineering Soils Maps PAUL M. SANTI Department of Geology and Geological database. In this technique, rose-pie charts provide an overall assessment of soils hazards structures such as pipelines, power lines, and roads; and regional evaluations of sources of ag- gregate

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


301

Heart Rate Artifact Suppression.  

E-Print Network [OSTI]

??Motion artifact strongly corrupts heart rate measurements in current pulse oximetry systems. In many, almost any motion will greatly diminish the system’s ability to extract… (more)

Dickson, Christopher

2012-01-01T23:59:59.000Z

302

Residential Solar Valuation Rates  

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

Residential Solar Valuation Rates Karl R. Rbago Rbago Energy LLC 1 The Ideal Residential Solar Tariff Fair to the utility and non-solar customers Fair compensation to...

303

Effective Rate Period  

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

charges or credits associated with the creation, termination, or modification to any tariff, contract, or rate schedule accepted or approved by the Federal Energy Regulatory...

304

LCC Guidance Rates  

Broader source: Energy.gov [DOE]

Notepad text file provides the LCC guidance rates in a numbered format for the various regions throughout the U.S.

305

Heavy metal balances of an Italian soil as affected by sewage sludge and Bordeaux mixture applications  

SciTech Connect (OSTI)

Applications of sewage sludge and Bordeaux mixture (Bm) (a mixture of copper sulfate and lime) add heavy metals to the soil. At an experimental farm in the Cremona district (Italy), the authors measured current heavy metal contents in soil and their removal via harvested products. They also measured heavy metal adsorption by soil from this farm. With these data, projections were made of the long-term development of heavy metal (Cd, Cu, and Zn) contents in soil, crop removal, and leaching at different application rates of sewage sludge and Bm. These projections were compared with existing quality standards of the European Union (EU) and Italy with regard to soil and groundwater. The calculations reveal that the permitted annual application rates of sewage sludge and Bm are likely to result in exceedance of groundwater and soil standards. Sewage sludge applications, complying with the Italian legal limits, may pose problems for Cd, Cu, and Zn within 30, 70, and 100 yr, respectively. Furthermore, severe Cu pollution of integrated and especially organic (Bm only) vineyards is unavoidable with the currently allowed application rates of Bm. The results suggest that the current Italian soil protection policy as well as the EU policy are not conducive of a sustainable heavy metal management in agroecosystems.

Moolenaar, S.W. [Wageningen Agricultural Univ. (Netherlands); Beltrami, P. [Univ. Cattolica del Sacro Cuore, Piacenza (Italy)

1998-07-01T23:59:59.000Z

306

LITERATURE SURVEY FOR GROUNDWATER TREATMENT OPTIONS FOR NITRATE IODINE-129 AND URANIUM 200-ZP-1 OPERABLE UNIT HANFORD SITE  

SciTech Connect (OSTI)

This literature review presents treatment options for nitrate, iodine-129, and uranium, which are present in groundwater at the 200-ZP-I Groundwater Operable Unit (OU) within the 200 West Area of the Hanford Site. The objective of this review is to determine available methods to treat or sequester these contaminants in place (i.e., in situ) or to pump-and-treat the groundwater aboveground (i.e., ex situ). This review has been conducted with emphasis on commercially available or field-tested technologies, but theoretical studies have, in some cases, been considered when no published field data exist. The initial scope of this literature review included only nitrate and iodine-I 29, but it was later expanded to include uranium. The focus of the literature review was weighted toward researching methods for treatment of nitrate and iodine-129 over uranium because of the relatively greater impact of those compounds identified at the 200-ZP-I OU.

BYRNES ME

2008-06-05T23:59:59.000Z

307

Uranyl nitrate pouring solution for producing nuclear fuel particles and a method for its preparation  

SciTech Connect (OSTI)

Sorbitol, or another polyalcohol such as erythritol, dulcitol or xylitol, is added to a solution containing uranyl nitrate which may also contain another heavy metal, such as thorium or plutonium, prior to preneutralization with ammonia in order to provide a highly viscous solution that can be preneutralized to a great extent without premature precipitation of uranium. The high viscosity makes possible the formation of favorably large drops when the solution is dripped into an ammonia containing bath for external gelification of the drops. According to the pouring apparatus used, the particles after washing, drying and sintering have a diameter between 0.6 and 1.5 mm. The polyalcohol is added to a hydrosol containing from 1.5 to 2 moles per liter of heavy metal, the polyalcohol being added until concentration of onethird mole of polyalcohol per mole of heavy metal is reached. In certain cases up to four moles of ammonium nitrate per liter are added. The solution so produced can be preneutralized with up to 90% of the amount of ammonia stoichiometrically necessary for T separation of uranium without the formation of any precipitate, preferably by first adding ammonia gas under strong stirring and then adding ammonium bicarbonate in excess, which decomposes to liberate ammonia to an extent determined by the temperature, which is to be precisely controlled. It is possible to obtain this way a solution of predetermined viscosity from which the excess ammonium bicarbonate can readily be separated.

Hein, K.

1983-05-24T23:59:59.000Z

308

How Soil Organic Matter Composition Controls Hexachlorobenzene-Soil-Interactions: Adsorption Isotherms and Quantum Chemical Modelling  

E-Print Network [OSTI]

Hazardous persistent organic pollutants (POPs) interact in soil with the soil organic matter (SOM) but this interaction is insufficiently understood at the molecular level. We investigated the adsorption of hexachlorobenzene (HCB) on soil samples with systematically modified SOM. These samples included the original soil, the soil modified by adding a hot water extract (HWE) fraction (soil+3 HWE and soil+6 HWE), and the pyrolyzed soil. The SOM contents increased in the order pyrolyzed soil soil soil+3 HWE soil+6 HWE. For the latter three samples this order was also valid for the HCB adsorption. The pyrolyzed soil adsorbed more HCB than the other samples at low initial concentrations, but at higher concentrations the HCB adsorption became weaker than in the samples with HWE addition. This adsorption behaviour combined with the differences in the chemical composition between the soil samples suggested that alkylated aromatic, phenol, and lignin monomer compounds contributed most to the HC...

Ahmed, Ashour; Kühn, Oliver

2013-01-01T23:59:59.000Z

309

Evaluation of soil washing for radiologically contaminated soils  

SciTech Connect (OSTI)

Soil washing has been applied internationally to decontaminate soils due to the widespread increase in environmental awareness manifested in the United States by promulgation of the Comprehensive Environmental Response, Compensation and Liability Act, yet we continue to lack understanding on why the technique works in one application and not in another. A soil washing process typically integrates a variety of modules, each designed to decontaminate the matrix by destroying a particular phase or segregating a particle size fraction in which the contaminants are concentrated. The more known about how the contaminants are fixed, the more likely the process will succeed. Much can be learned from bioavailability studies on heavy metals in soils. Sequential extraction experiments designed to destroy one fixation mechanism at a time can be used to determine how contaminants are bound. This knowledge provides a technical basis for designing a processing strategy to efficiently decontaminate soil while creating a minimum of secondary wastes. In this study, a soil from the Idaho National Engineering Laboratory was physically and chemically characterized, then sequentially extracted to determine if soil washing could be effectively used to remove cesium, cobalt and chromium.

Gombert, D. II

1994-03-01T23:59:59.000Z

310

Non-Traditional Soil Additives: Can They Improve Crop Production?  

E-Print Network [OSTI]

Non-traditional soil additives include soil conditioners such as organic materials and minerals, soil activators that claim to stimulate soil microbes or inoculate soil with new beneficial organisms, and wetting agents that may be marketed...

McFarland, Mark L.; Stichler, Charles; Lemon, Robert G.

2002-06-26T23:59:59.000Z

311

Previous Power Rates (rates/current)  

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

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

312

Power Rate Cases (pbl/rates)  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - September 2006PhotovoltaicSeptember 22,ReactorAbout Power > FinancialPowerRates

313

Power Rates Announcements (pbl/rates)  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - September 2006PhotovoltaicSeptember 22,ReactorAbout Power > FinancialPowerRates

314

Rates Meetings and Workshops (pbl/rates)  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared at 278, 298, andEpidermal Growth Factor. |INCIDENCET3PACI-T3Rate

315

Review and model-based analysis of factors influencing soil carbon sequestration beneath switchgrass (Panicum virgatum)  

SciTech Connect (OSTI)

Abstract. A simple, multi-compartment model was developed to predict soil carbon sequestration beneath switchgrass (Panicum virgatum) plantations in the southeastern United States. Soil carbon sequestration is an important component of sustainable switchgrass production for bioenergy because soil organic matter promotes water retention, nutrient supply, and soil properties that minimize erosion. A literature review was included for the purpose of model parameterization and five model-based experiments were conducted to predict how changes in environment (temperature) or crop management (cultivar, fertilization, and harvest efficiency) might affect soil carbon storage and nitrogen losses. Predictions of soil carbon sequestration were most sensitive to changes in annual biomass production, the ratio of belowground to aboveground biomass production, and temperature. Predictions of ecosystem nitrogen loss were most sensitive to changes in annual biomass production, the soil C/N ratio, and nitrogen remobilization efficiency (i.e., nitrogen cycling within the plant). Model-based experiments indicated that 1) soil carbon sequestration can be highly site specific depending on initial soil carbon stocks, temperature, and the amount of annual nitrogen fertilization, 2) response curves describing switchgrass yield as a function of annual nitrogen fertilization were important to model predictions, 3) plant improvements leading to greater belowground partitioning of biomass could increase soil carbon sequestration, 4) improvements in harvest efficiency have no indicated effects on soil carbon and nitrogen, but improve cumulative biomass yield, and 5) plant improvements that reduce organic matter decomposition rates could also increase soil carbon sequestration, even though the latter may not be consistent with desired improvements in plant tissue chemistry to maximize yields of cellulosic ethanol.

Garten Jr, Charles T [ORNL

2012-01-01T23:59:59.000Z

316

Remediation of contaminated soils and sediments using Daramend bioremediation  

SciTech Connect (OSTI)

Soils and sediments containing polyaromatic hydrocarbons (PAH), petroleum hydrocarbons, heavy oils, chlorinated phenols, pesticides, herbicides and phthalates, either individually or in combination, have been difficult to remediate in the past. Not only the species of contaminant, but contaminant concentrations were roadblocks to successful use of bioremediation. Daramend{sup Tm} remediation has removed many of these obstacles through extensive research. Bench-scale, pilot-scale and full-scale demonstrations have been conducted at a variety of industrial sites. At a manufactured gas site, 295 days of Daramend remediation reduced concentrations of chrysene and fluoranthene from 38.9 mg/kg to 5.9 mg/kg and 84.6 mg/kg to 7.8 mg/kg respectively. Elsewhere, the total PAH concentration in a silty soil was reduced from 1,442 mg/kg to 36 mg/kg. Concentrations of even the most refractory PAHs (e.g. pyrene, benzo(a)pyrene) were reduced to below the established clean-up guidelines. Total petroleum hydrocarbons (diesel fuel) have also been reduced from 8,700 mg/kg to 34 mg/kg after 182 days of treatment. Similarly, in a clay soil contaminated by crude oil processing, the concentrations of high molecular weight aliphatic hydrocarbons were rapidly reduced (138 days) to below the remediation criteria. Demonstrations with wood treatment site soils have proven Daramend remediation effective in enhancing the target compound degradation rates. Soils containing 2170 mg PCP/kg were shown to contain only 11 mg PCP/kg after 280 days of Darmend remediation. The issue of toxicity of soil containing increased amounts of pentachlorophenols was solved. Performance data collected during these projects indicate that Daramend remediation provides a cost effective method for clean-up of soils and sediments containing a variety of organic compounds.

Burwell, S.W.; Bucens, P.G.; Seech, A.G.

1996-05-01T23:59:59.000Z

317

Water Structure at the Air-Aqueous Interface of Divalent Cation and Nitrate Solutions Man Xu, Rick Spinney, and Heather C. Allen*  

E-Print Network [OSTI]

Water Structure at the Air-Aqueous Interface of Divalent Cation and Nitrate Solutions Man Xu, Rick, Columbus, Ohio 43210 ReceiVed: July 24, 2008; ReVised Manuscript ReceiVed: December 4, 2008 The water surface structure of aqueous magnesium, calcium, and strontium nitrate solutions with six to seven water

318

RAPID SEPARATION METHOD FOR ACTINIDES IN EMERGENCY SOIL SAMPLES  

SciTech Connect (OSTI)

A new rapid method for the determination of actinides in soil and sediment samples has been developed at the Savannah River Site Environmental Lab (Aiken, SC, USA) that can be used for samples up to 2 grams in emergency response situations. The actinides in soil method utilizes a rapid sodium hydroxide fusion method, a lanthanum fluoride soil matrix removal step, and a streamlined column separation process with stacked TEVA, TRU and DGA Resin cartridges. Lanthanum was separated rapidly and effectively from Am and Cm on DGA Resin. Vacuum box technology and rapid flow rates are used to reduce analytical time. Alpha sources are prepared using cerium fluoride microprecipitation for counting by alpha spectrometry. The method showed high chemical recoveries and effective removal of interferences. This new procedure was applied to emergency soil samples received in the NRIP Emergency Response exercise administered by the National Institute for Standards and Technology (NIST) in April, 2009. The actinides in soil results were reported within 4-5 hours with excellent quality.

Maxwell, S.; Culligan, B.; Noyes, G.

2009-11-09T23:59:59.000Z

319

Plant uptake of pentachlorophenol from sludge-amended soils  

SciTech Connect (OSTI)

A greenhouse study was conducted to determine the effects of sludge on plant uptake of {sup 14}C-pentachlorophenol (PCP). Plants included tall fescue (Festuca arundinacea Schreb.), lettuce (Latuca sativa L.), carrot (Daucus carota L.), and chile pepper (Capsicum annum L.). Minimal intact PCP was detected in the fescue and lettuce by gas chromatography/mass spectrometry (GC/MS) analysis. No intact PCP was detected in the carrot tissue extracts. Chile pepper was not analyzed for intact PCP because methylene chloride extracts contained minimal {sup 14}C. The GC/MS analysis of soil extracts at harvest suggests a half-life of PCP of about 10 d independent of sludge rate or PCP loading rate. Rapid degradation of PCP in the soil apparently limited PCP availability to the plant. Bioconcentration factors (dry plant wt./initial soil PCP concentration) based on intact PCP were <0.01 for all crops, suggesting little PCP uptake. Thus, food-chain crop PCP uptake in these alkaline soils should not limit land application of sludge.

Bellin, C.A.; O'Connor, G.A.

1990-01-01T23:59:59.000Z

320

Development of a Method for Predictively Simulating Penetration of a Low Speed Impactor into a Weak Cohesionless Soil  

E-Print Network [OSTI]

geotextile barrier system that utilizes soil as ballast to prevent ballistic or vehicular impacts LSTC Livermore Software Technology Corporation LS-DYNA A complex non-linear explicit FEA software package developed by LSTC to simulate complex high rate non...

Arrington, Dusty Ray

2013-04-29T23:59:59.000Z

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


321

Soil protection major Prof. Dani Or  

E-Print Network [OSTI]

and energy fluxes in soils (water, air, nutrients and pollutants) · provide solutions for sustainable land1 Soil protection major Prof. Dani Or Soil and Terrestrial Environmental Physics CHN F 29.1 Universitätstrasse 16 8092 Zürich dani.or@env.ethz.ch +41 44 633 60 15 Objectives of soil protection major

Giger, Christine

322

CROP & SOIL SCIENCES Extension Peanut Agronomist  

E-Print Network [OSTI]

CROP & SOIL SCIENCES Extension Peanut Agronomist Committee Membership Dr. J. Michael Moore - committee chair Dr. Clint Waltz Department of Crop & Soil Sciences Department of Crop & Soil Sciences-7300 Fax: (229) 386-7308 Fax: (770) 412-4734 Dr. Eric Prostko Dr. Guy Collins Department of Crop & Soil

Arnold, Jonathan

323

CROP & SOIL SCIENCES Small Grain Breeding  

E-Print Network [OSTI]

CROP & SOIL SCIENCES Small Grain Breeding Committee Membership Dr. Paul Raymer - committee chair Dr. Scott Jackson Department of Crop & Soil Sciences Department of Crop & Soil Sciences University & Soil Sciences Department of Horticulture University of Georgia University of Georgia 2360 Rainwater Rd

Arnold, Jonathan

324

Soil and Water Conservation Spring 2014  

E-Print Network [OSTI]

of the interconnectedness of soil and water conservation. The course focusses on soil and water management as it relates to relevant issues surrounding agriculture and sustainability. Concepts include current soil and water and societal issues. Course Goals: Understand the basic principles of soil and water management

Ma, Lena

325

SOIL QUALITY AND CROP Dick Wolkowski  

E-Print Network [OSTI]

#12;WHAT IS SOIL QUALITY DEPENDS ON WHO YOU ARE: Farmer: Highly productive, sustainable media Soil test and pH "Artificial" drainage Residue management Microbial activity Salts #12;Soil biology factors into an index #12;Pennsylvania #12;A SOIL MANAGEMENT ASSESSMENT FRAMEWORK (Andrews et al., 2004

Balser, Teri C.

326

Soil and Water Conservation Spring 2014  

E-Print Network [OSTI]

focusses on soil and water management as it relates to relevant issues surrounding agriculture and sustainability. Concepts include current soil and water resources, historical erosion and sedimentation problems principles of soil and water management and conservation. 2. Discuss strategies for soil or water

Ma, Lena

327

Productive soil must be fertile physical fertility  

E-Print Network [OSTI]

, structure, drainage, tilth · chemical fertility ­ nutrient supply · soil testing #12;#12;Soil formation-'weathering' · physical ­freezing, thawing, wetting, drying, organisms · chemical ­dissolved minerals moved in water ­soil · improve by adding organic residues ­ decay: 90% CO2 + H2O #12;#12;#12;Problem: `heavy' soil · aggregates

Balser, Teri C.

328

Soil as natural capital Ecosystem services and  

E-Print Network [OSTI]

threats Decline in: Lead to: soil carbon soil erosion biological ac2 tool box Information on sustainable soil use incentives After Daiily et al 2009 "decision loop" #12;Soil is a natural capital Ecosystem services Nutrient retention Carbon storage Water retention

329

CROP & SOIL SCIENCES Cotton Physiologist Tifton campus  

E-Print Network [OSTI]

CROP & SOIL SCIENCES Cotton Physiologist ­ Tifton campus Committee Membership Dr. Stanley Culpepper

Arnold, Jonathan

330

KSInglett Page 1 MATH FOR SOIL SCIENTISTS  

E-Print Network [OSTI]

skills that are most relevant to graduate courses in environmental science including Soil and Water transport 9. Soil temperature, heat capacity and conductivity Unit 3 PROBLEM SOLVING IN SOIL BIOCHEMISTRY 10 and gas fluxes Unit 5 PROBLEM SOLVING IN SOIL CHEMISTRY, FERTILITY, and MANAGEMENT (optional) 19. p

Ma, Lena

331

RESEARCH ARTICLE A novel soil organic C model using climate, soil type  

E-Print Network [OSTI]

RESEARCH ARTICLE A novel soil organic C model using climate, soil type and management data-Verlag, France 2012 Abstract This report evidences factors controlling soil or- ganic carbon at the national scale by modelling data of 2,158 soil samples from France. The global soil carbon amount, of about 1

Paris-Sud XI, Université de

332

REGULAR ARTICLE Impact of biological soil crusts and desert plants on soil  

E-Print Network [OSTI]

REGULAR ARTICLE Impact of biological soil crusts and desert plants on soil microfaunal community plants and biological soil crusts on desert soil nematode and protozoan abundance and community composition. In the first experiment, biological soil crusts were removed by physical trampling. Treatments

Neher, Deborah A.

333

Impact of Soil Type and Compaction Conditions on Soil Water Characteristic  

E-Print Network [OSTI]

Impact of Soil Type and Compaction Conditions on Soil Water Characteristic C. J. Miller, M.ASCE1 the variation of water content and pore water suction for compacted clayey soils. The soils had varying amounts of clay fraction with plasticities ranging from low to high plasticity. The unsaturated soil behavior

Yu, Sheng-Tao

334

Part I. Ecological Sites and Soil Part II. A Framework for Soil and  

E-Print Network [OSTI]

Part I. Ecological Sites and Soil Survey Part II. A Framework for Soil and Vegetation Dynamics Arlene Tugel, Soil Scientist Liaison to ARS, USDA-NRCS Las Cruces, NM and the Soils-ESD Advisory Group #12;What makes a site a site? Soil forming factors: climate, parent, material, biotic factors

335

Soil Test Report The following information is being provided for farmers. For consumer soil test report  

E-Print Network [OSTI]

Soil Test Report The following information is being provided for farmers. For consumer soil test fertility status of the soil in each field can invest wisely in fertilizer and lime to produce the most economical crop yields. A soil test provides the needed information about soil pH, lime need and available

Isaacs, Rufus

336

Soil drainage as an active agent of recent soil evolution: a David Montagnea,b  

E-Print Network [OSTI]

1 Soil drainage as an active agent of recent soil evolution: a review* David Montagnea,b , Sophie on pedogenesis mainly focuses on the long-term soil formation and most often neglects recent soil evolution drainage on soil evolution. Artificial drainage is considered as an example of the impact of recent changes

Boyer, Edmond

337

Soil Aggregate Size Affects Phosphorus Desorption from Highly Weathered Soils and Plant Growth  

E-Print Network [OSTI]

Soil Aggregate Size Affects Phosphorus Desorption from Highly Weathered Soils and Plant Growth X of P around soil aggregates (Gunary et al., 1964; Linquist etfrom soil, understanding P desorption from soils may improve the precision of P diagnosis and fertilization recommendations. Many al., 1997

van Kessel, Chris

338

Tree Species Effects on Soil Organic Matter Dynamics: The Role of Soil  

E-Print Network [OSTI]

Tree Species Effects on Soil Organic Matter Dynamics: The Role of Soil Cation Composition Sarah E the influence of tree species on soil carbon and nitrogen (N) dynamics in a common garden of replicated substantial divergence in foliar and soil base cation concentrations and soil pH among spe- cies, we

Minnesota, University of

339

Global Soil Change: Land Use, Soil and Water SWS4231C, SWS5234  

E-Print Network [OSTI]

of the soil system to withstand global-scale perturbations (e.g., climate or land use change, spread Properties 4. Land Use Change Impacts on Soils 5. Land Use and Agriculture (Irrigation and Fertilization In Soil) 6. Land Use and Soil Erosion 7. Climate Change Impacts on Soils 8. Land Use-Climate

Ma, Lena

340

On Thermonuclear Reaction Rates  

E-Print Network [OSTI]

Nuclear reactions govern major aspects of the chemical evolution od galaxies and stars. Analytic study of the reaction rates and reaction probability integrals is attempted here. Exact expressions for the reaction rates and reaction probability integrals for nuclear reactions in the case of nonresonant, modified nonresonant, screened nonresonant and resonant cases are given. These are expressed in terms of H-functions, G-functions and in computable series forms. Computational aspects are also discussed.

H. J. Haubold; A. M. Mathai

1996-12-02T23:59:59.000Z

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


341

Worldwide organic soil carbon and nitrogen data  

SciTech Connect (OSTI)

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.

Zinke, P.J.; Stangenberger, A.G. [Univ. of California, Berkeley, CA (United States). Dept. of Forestry and Resource Management; Post, W.M.; Emanual, W.R.; Olson, J.S. [Oak Ridge National Lab., TN (United States)

1986-09-01T23:59:59.000Z

342

Draft Genome Sequence for Microbacterium laevaniformans Strain OR221, a Bacterium Tolerant to Metals, Nitrate, and Low pH  

SciTech Connect (OSTI)

Microbacterium laevaniformans strain OR221 was isolated from subsurface sediments obtained from the Field Research Center (FRC) in Oak Ridge, TN. It was characterized as a bacterium tolerant to heavy metals such as uranium, nickel, cobalt, cadmium, as well as nitrate and low pH. We present its draft genome sequence.

Brown, Steven D [ORNL; Palumbo, Anthony Vito [ORNL; Panikov, Nikolai [ORNL; Ariyawansa, Thilini [Northeastern University; Klingeman, Dawn Marie [ORNL; Johnson, Courtney M [ORNL; Land, Miriam L [ORNL; Utturkar, Sagar M [ORNL; Epstein, Slava [Northeastern University

2012-01-01T23:59:59.000Z

343

DISTINCT PATTERNS OF NITRATE REDUCTASE ACTIVITY IN BROWN ALGAE: LIGHT AND AMMONIUM SENSITIVITY IN LAMINARIA DIGITATA IS ABSENT IN  

E-Print Network [OSTI]

DISTINCT PATTERNS OF NITRATE REDUCTASE ACTIVITY IN BROWN ALGAE: LIGHT AND AMMONIUM SENSITIVITY and lowest in summer. This is the first report of NR activity in any alga that is not strongly regulated the regulation of NR by light that has been observed in other algae and higher plants. Key index words: ammonium

Berges, John A.

344

Enhanced anaerobic biodegradation of BTEX-ethanol mixtures in aquifer columns amended with sulfate, chelated ferric iron or nitrate  

E-Print Network [OSTI]

Enhanced anaerobic biodegradation of BTEX-ethanol mixtures in aquifer columns amended with sulfate-mail: alvarez@rice.edu) Key words: anaerobic biostimulation, bioremediation, BTEX, ethanol, natural attenuation­Fe(III) or nitrate to enhance the biodegradation of BTEX and ethanol mixtures. The rapid biodegradation of ethanol

Alvarez, Pedro J.

345

Size effect of hematite and corundum inclusions on the efflorescence relative humidities of aqueous ammonium nitrate particles  

E-Print Network [OSTI]

and Structure: Aerosols and particles (0345, 4801); 0345 Atmospheric Composition and Structure: Pollution ammonium nitrate particles Jeong-Ho Han Department of Environmental Chemistry, Atmospheric Science Division by the saturation of the aqueous solution with respect to the solid. INDEX TERMS: 0305 Atmospheric Composition

346

Evaluation of a solar intermittent refrigeration system for ice production operating with ammonia/lithium nitrate  

SciTech Connect (OSTI)

A novel solar intermittent refrigeration system for ice production developed in the Centro de Investigacion en Energia of the Universidad Nacional Autonoma de Mexico is presented. The system operates with the ammonia/lithium nitrate mixture. The system developed has a nominal capacity of 8 kg of ice/day. It consists of a cylindrical parabolic collector acting as generator-absorber. Evaporator temperatures as low as -11 C were obtained for several hours with solar coefficients of performance up to 0.08. It was found that the coefficient of performance increases with the increment of solar radiation and the solution concentration. A dependency of the coefficient of performance was not founded against the cooling water temperature. Also it was found that the maximum operating pressure increases meanwhile the generation temperature decreases with an increase of the solution concentration. (author)

Rivera, W.; Moreno-Quintanar, G.; Best, R. [Centro de Investigacion en Energia, Universidad Nacional Autonoma de Mexico, A.P. 34, 62580 Temixco, Mor. (Mexico); Rivera, C.O.; Martinez, F. [Facultad de Ingenieria Campus Coatzacoalcos, Universidad Veracruzana, Av. Universidad Km 7.5, 96530 Coatzacoalcos, Ver. (Mexico)

2011-01-15T23:59:59.000Z

347

Relation of Soils, Rainfall and Grazing Management to Vegetation, Western Edwards Plateau of Texas.  

E-Print Network [OSTI]

on the station have been subjected to different rates of stocking with various ' cornhinations of sheep and cattle since grazing experiments were started in 1938. Vegetation on the experimental pastures is fairly representative of that supported by several... areas. I (2) Tobosagrass has been affected very little by the grazing practices for the 16-year period. ' It decreased slightly on the ridgetop soils but increased on other soils in pastures grazed with sheep. ' Cattle utilized tobosa more...

Young, Vernon A. (Vernon Alphus); Thomas, Gerald W.

1954-01-01T23:59:59.000Z

348

A soil moisture budget analysis of Texas using basic climatic data  

E-Print Network [OSTI]

capacities and water retention curves for sand, clay and a medium textured soil (adapted from Odumodu, 1977). 29 10. Predicted infiltration rates for various types of deep soils with a shallow ponded surface (adapted from Haan et al. , 1982). . 29...-latitudes (Trenchard, 1976) would be enough itself for considerable variation in climate. However, the border adjacent to the Gulf of Mexico and prominent advection of air masses, which either have been generated or modified by the sea, greatly increases...

Lowther, Ronald Paul

1989-01-01T23:59:59.000Z

349

Infiltration and sediment production of Edwards Plateau rangeland as affectd by soil characteristics and grazing management  

E-Print Network [OSTI]

at their extremes were highest on the range sites characterized by coarse textured soils. Simple correlation between water intake rates during the second 30 min period showed that soil structure of the first horizon was highly correlated with water in- take... and topographic properties evaluated were bulk density, particle density, total pore space, texture, organic matter, pH, aggregate stability, rock cover, slope and micro-depression size, number and depth. Plant biomass for each site was collected and separated...

McGinty, William Allan

1976-01-01T23:59:59.000Z

350

Systematical Investigations of Cs - 137 Concentration in Soils in Bansko - Razlog Region  

SciTech Connect (OSTI)

Systematical investigations of Cs-137 concentration in soil in Bansko - Razlog region have been performed for the first time on a total area of about 40 km2. By means of high-resolution gamma-ray spectroscopy the radio-nuclide content of soil samples has been determined. The Cs-137 deposition density following the Chernobyl accident has been estimated and compared with results obtained in other countries. The additional dose rate caused by this fallout has been estimated, too.

Kostov, L. K.; Mladenov, Ml. I.; Protochristov, Ch. N.; Stoyanov, Ch. P. [Institute for Nuclear Research and Nuclear Energy, Sofia 1000 (Bulgaria); Kobilarov, R. G. [Department of Applied Physics, Technical University - Sofia, Sofia 1000 (Bulgaria); Kostova, L. G. [HPC - Bulgaria, Sofia 1000 (Bulgaria)

2007-04-23T23:59:59.000Z

351

Modeling the effects of spatial agronomic inputs on crop yield  

E-Print Network [OSTI]

soil samples. B9 Nitrate values for 45 ? 60 cm soil samples. B10 Nitrate values for 60 ? 75 cm soil samples. Bll Nitrate values for 75 ? 90 cm soil samples. 83 89 91 95 97 LIST OF FIGURES Figure Page 1 Position operators for n = 3. 2 Sample... fertilizer rates for region 5 are applied to portions of regions 1 ? 4 and regions 6 ? 9 (the region intersecting 8 circles). Figure 4 ? Systematic decrease of sampling resolution. Using data from these simulations at differing resolutions, several...

McCauley, James Darrell

1992-01-01T23:59:59.000Z

352

Selective leaching of uranium from uranium-contaminated soils: Progress report 1  

SciTech Connect (OSTI)

Three soils and a sediment contaminated with uranium were used to determine the effectiveness of sodium carbonate and citric acid leaching to decontaminated or remove uranium to acceptable regulatory levels. Two of the soils were surface soils from the DOE facility formerly called the Feed Materials Production Center (FMPC) at Fernald, Ohio. This facility is presently called the Femald Environmental Management Project (FEMP). Carbonate extractions generally removed from 70 to 90% of the uranium from the Fernald storage pad soil. Uranium was slightly more difficult to extract from the Fernald incinerator and the Y-12 landfarm soils. Very small amounts of uranium could be extracted from the storm sewer sediment. Extraction with carbonate at high solution-to-soil ratios were as effective as extractions at low solution-to-soil ratios, indicating attrition by the paddle mixer was not significantly different than that provided in a rotary extractor. Also, pretreatments such as milling or pulverizing the soil sample did not appear to increase extraction efficiency when carbonate extractions were carried out at elevated temperatures (60[degree]C) or long extraction times (23 h). Adding KMnO[sub 4] in the carbonate extraction appeared to increase extraction efficiency from the Fernald incinerator soil but not the Fernald storage pad soil. The most effective leaching rates (> 90 % from both Fernald soils) were obtained using a citrate/dithionite extraction procedure designed to remove amorphous (noncrystalline) iron/aluminum sesquioxides from surfaces of clay minerals. Citric acid also proved to be a very good extractant for uranium.

Francis, C.W.; Mattus, A.J.; Farr, L.L.; Elless, M.P.; Lee, S.Y.

1993-02-01T23:59:59.000Z

353

Selective leaching of uranium from uranium-contaminated soils: Progress report 1  

SciTech Connect (OSTI)

Three soils and a sediment contaminated with uranium were used to determine the effectiveness of sodium carbonate and citric acid leaching to decontaminated or remove uranium to acceptable regulatory levels. Two of the soils were surface soils from the DOE facility formerly called the Feed Materials Production Center (FMPC) at Fernald, Ohio. This facility is presently called the Femald Environmental Management Project (FEMP). Carbonate extractions generally removed from 70 to 90% of the uranium from the Fernald storage pad soil. Uranium was slightly more difficult to extract from the Fernald incinerator and the Y-12 landfarm soils. Very small amounts of uranium could be extracted from the storm sewer sediment. Extraction with carbonate at high solution-to-soil ratios were as effective as extractions at low solution-to-soil ratios, indicating attrition by the paddle mixer was not significantly different than that provided in a rotary extractor. Also, pretreatments such as milling or pulverizing the soil sample did not appear to increase extraction efficiency when carbonate extractions were carried out at elevated temperatures (60{degree}C) or long extraction times (23 h). Adding KMnO{sub 4} in the carbonate extraction appeared to increase extraction efficiency from the Fernald incinerator soil but not the Fernald storage pad soil. The most effective leaching rates (> 90 % from both Fernald soils) were obtained using a citrate/dithionite extraction procedure designed to remove amorphous (noncrystalline) iron/aluminum sesquioxides from surfaces of clay minerals. Citric acid also proved to be a very good extractant for uranium.

Francis, C.W.; Mattus, A.J.; Farr, L.L.; Elless, M.P.; Lee, S.Y.

1993-02-01T23:59:59.000Z

354

Demonstration, testing, & evaluation of in situ heating of soil. Draft final report, Volume I  

SciTech Connect (OSTI)

This document is a draft final report (Volume 1) for US DOE contract entitled, {open_quotes}Demonstration Testing and Evaluation of In Situ Soil Heating,{close_quotes} Contract No. DE-AC05-93OR22160, IITRI Project No. C06787. This report is presented in two volumes. Volume I contains the technical report and Volume II contains appendices with background information and data. In this project approximately 300 cu. yd. of clayey soil containing a low concentration plume of volatile organic chemicals was heated in situ by the application of electrical energy. It was shown that as a result of heating the effective permeability of soil to air flow was increased such that in situ soil vapor extraction could be performed. The initial permeability of soil was so low that the soil gas flow rate was immeasurably small even at high vacuum levels. When scaled up, this process can be used for the environmental clean up and restoration of DOE sites contaminated with VOCs and other organic chemicals boiling up to 120{degrees} to 130{degrees}C in the vadose zone. Although it may applied to many types of soil formations, it is particularly attractive for low permeability clayey soil where conventional in situ venting techniques are limited by low air flow.

Dev, H.; Enk, J.; Jones, D.; Saboto, W.

1996-02-12T23:59:59.000Z

355

Soil Organic Matter of Natural and Restored Coastal Wetland Soils in Southern California  

E-Print Network [OSTI]

of natural and created marsh soils. J. Exp. Mar. Biol. Ecol.2007. Freshwater Input Structures Soil Properties, VerticalS.S. , Hoover, K.L. 1996. Soil properties of reference

Elgin, Barbara K.

2012-01-01T23:59:59.000Z

356

Organic soil phosphorus is plant-available but is neglected by routine soil-testing methods  

E-Print Network [OSTI]

microorganisms. Biol. Fertil. Soils 1988; 5: 308-312 Van derplant species and to evaluate different soil-testing methodsin measuring organic soil-P. Material and Methods This

Steffens, Diedrich; Leppin, Thomas; Schubert, Sven

2009-01-01T23:59:59.000Z

357

Consolidation theories for saturated-unsaturated soils and numerical simulation of residential buildings on expansive soils  

E-Print Network [OSTI]

and numerical techniques: different simulation methods for different boundary conditions such as tree, grass, and bare soils, coupled hydro-mechanical stress analysis to describe deformation of saturated-unsaturated soils, jointed elements simulation of soil...

Zhang, Xiong

2005-11-01T23:59:59.000Z

358

Effect of transpiration rate on internal plant resistance to water flow  

E-Print Network [OSTI]

models for liquid water flow in plants. because it enables one to estimate leaf water potential from known or estimated transpiration rates. The predicted leaf water potential can be used for scheduling irrigation ~ The leaf diffusion resistance... OF LITERATURE Soil Resistance Internal Plant Resistance Ohm's Law Analogy Mathematical Models of Water Transport in the Soil-Plant- Atmosphere System . ~ Poiseuille's Law . ~ ~ ~ ~ Leaf Diffusion and Aerodynamic Resistances ~ Conclusions of Literature...

Hailey, James Lester

1971-01-01T23:59:59.000Z

359

Photolysis of smoke dyes on soils  

SciTech Connect (OSTI)

Photolysis of an azo, a quinophthalone, and several anthraquinone smoke dyes was studied on soil surfaces. Initially, rapid photodegradation of each dye occurred, followed by a period of much slower rate of loss, indicating that the remaining fraction of the dye was photochemically protected. The average mean depths of photolysis ranged from 0.33 to 0.68 mm for outdoor studies and from 0.42 to 0.73 mm for lab studies. The magnitude of the mean depths of photolysis suggests that photo-degradation of the dyes occurs through indirect photochemical processes. Photolysis products for only two of the dyes could be identified. Photolysis of Disperse Red 9 resulted in the formation of 1-aminoanthraquinone, whereas Solvent Yellow 33 photo-degraded to give 2-carboxyquinoline and phthalic anhydride. Reaction mechanisms involving sensitized photo-oxidation by singlet oxygen are consistent with the formation of these reaction products.

Adams, R.L. (Technology Applications Inc., Athens, GA (United States). Environmental Research Lab.); Weber, E.J.; Baughman, G.L. (Environmental Protection Agency, Athens, GA (United States). Environmental Research Lab.)

1994-06-01T23:59:59.000Z

360

Rates and Repayment Services  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared at 278, 298, andEpidermal Growth Factor.Tariff Rates FY 2015 Rates

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


361

Developing a Soil Property Database for the Oklahoma Mesonet.  

E-Print Network [OSTI]

??The objective of this study was to create a comprehensive database of soil hydraulic and physical properties of the Oklahoma Mesonet station soils. Replicate soil… (more)

Scott, Bethany

2012-01-01T23:59:59.000Z

362

Assessing FES Density and Dissolution-independent Nitrate Desorption in Hyperalkaline Weathered Hanford Sediment  

E-Print Network [OSTI]

Hanford Sediment Yi-Ting (Emmy) Deng Crop and Soil Sciences Seminar Wednesday March 2, 2011 at 3:35 PM with sediments in the "near field" (close to the contaminant source). These minerals, such as NO3-feldspathoids must be considered to accurately forecast the stability of waste-impacted sediments. The overall goal

Arnold, Jonathan

363

Nitrogen availability and indirect measurements of greenhouse gas emissions from aerobic and anaerobic biowaste digestates applied to agricultural soils  

SciTech Connect (OSTI)

Highlights: • Nitrogen release in digestate-amended soil depends on the digestate type. • Overall N release is modulated by digestate mineral and mineralisable N contents. • Microbial immobilisation does not influence overall release of digestate N in soil. • Digestate physical properties and soil type interact to affect overall N recovery. • High labile C inputs in digestate may promote denitrification in fine-textured soil. - Abstract: Recycling biowaste digestates on agricultural land diverts biodegradable waste from landfill disposal and represents a sustainable source of nutrients and organic matter (OM) to improve soil for crop production. However, the dynamics of nitrogen (N) release from these organic N sources must be determined to optimise their fertiliser value and management. This laboratory incubation experiment examined the effects of digestate type (aerobic and anaerobic), waste type (industrial, agricultural and municipal solid waste or sewage sludge) and soil type (sandy loam, sandy silt loam and silty clay) on N availability in digestate-amended soils and also quantified the extent and significance of the immobilisation of N within the soil microbial biomass, as a possible regulatory mechanism of N release. The digestate types examined included: dewatered, anaerobically digested biosolids (DMAD); dewatered, anaerobic mesophilic digestate from the organic fraction of municipal solid waste (DMADMSW); liquid, anaerobic co-digestate of food and animal slurry (LcoMAD) and liquid, thermophilic aerobic digestate of food waste (LTAD). Ammonium chloride (NH{sub 4}Cl) was included as a reference treatment for mineral N. After 48 days, the final, maximum net recoveries of mineral N relative to the total N (TN) addition in the different digestates and unamended control treatments were in the decreasing order: LcoMAD, 68%; LTAD, 37%, DMAD, 20%; and DMADMSW, 11%. A transient increase in microbial biomass N (MBN) was observed with LTAD application, indicating greater microbial activity in amended soil and reflecting the lower stability of this OM source, compared to the other, anaerobic digestate types, which showed no consistent effects on MBN compared to the control. Thus, the overall net release of digestate N in different soil types was not regulated by N transfer into the soil microbial biomass, but was determined primarily by digestate properties and the capacity of the soil type to process and turnover digestate N. In contrast to the sandy soil types, where nitrate (NO{sub 3}{sup -}) concentrations increased during incubation, there was an absence of NO{sub 3}{sup -} accumulation in the silty clay soil amended with LTAD and DMADMSW. This provided indirect evidence for denitrification activity and the gaseous loss of N, and the associated increased risk of greenhouse gas emissions under certain conditions of labile C supply and/or digestate physical structure in fine-textured soil types. The significance and influence of the interaction between soil type and digestate stability and physical properties on denitrification processes in digestate-amended soils require urgent investigation to ensure management practices are appropriate to minimise greenhouse gas emissions from land applied biowastes.

Rigby, H.; Smith, S.R., E-mail: s.r.smith@imperial.ac.uk

2013-12-15T23:59:59.000Z

364

Enhanced Attenuation Technologies: Passive Soil Vapor Extraction  

SciTech Connect (OSTI)

Passive soil vapor extraction (PSVE) is an enhanced attenuation (EA) approach that removes volatile contaminants from soil. The extraction is driven by natural pressure gradients between the subsurface and atmosphere (Barometric Pumping), or by renewable sources of energy such as wind or solar power (Assisted PSVE). The technology is applicable for remediating sites with low levels of contamination and for transitioning sites from active source technologies such as active soil vapor extraction (ASVE) to natural attenuation. PSVE systems are simple to design and operate and are more cost effective than active systems in many scenarios. Thus, PSVE is often appropriate as an interim-remedial or polishing strategy. Over the past decade, PSVE has been demonstrated in the U.S. and in Europe. These demonstrations provide practical information to assist in selecting, designing and implementing the technology. These demonstrations indicate that the technology can be effective in achieving remedial objectives in a timely fashion. The keys to success include: (1) Application at sites where the residual source quantities, and associated fluxes to groundwater, are relatively low; (2) Selection of the appropriate passive energy source - barometric pumping in cases with a deep vadose zone and barrier (e.g., clay) layers that separate the subsurface from the atmosphere and renewable energy assisted PSVE in other settings and where higher flow rates are required. (3) Provision of sufficient access to the contaminated vadose zones through the spacing and number of extraction wells. This PSVE technology report provides a summary of the relevant technical background, real-world case study performance, key design and cost considerations, and a scenario-based cost evaluation. The key design and cost considerations are organized into a flowchart that dovetails with the Enhanced Attenuation: Chlorinated Organics Guidance of the Interstate Technology and Regulatory Council (ITRC). The PSVE flowchart provides a structured process to determine if the technology is, or is not, reasonable and defensible for a particular site. The central basis for that decision is the expected performance of PSVE under the site specific conditions. Will PSVE have sufficient mass removal rates to reduce the release, or flux, of contamination into the underlying groundwater so that the site can meet it overall remedial objectives? The summary technical information, case study experiences, and structured decision process provided in this 'user guide' should assist environmental decision-makers, regulators, and engineers in selecting and successfully implementing PSVE at appropriate sites.

Vangelas, K.; Looney, B.; Kamath, R.; Adamson, D.; Newell, C.

2010-03-15T23:59:59.000Z

365

Growth and elemental composition of sorghum sudangrass grown on flyash/organic waste-amended soils  

SciTech Connect (OSTI)

A greenhouse study was conducted to evaluate the potential benefitsof using fly ash/organic waste mixtures amended to soils for growth andcomposition of mineral elements by `sorgrass` (Sorghum vulgaris var.sudanense Hitchc.) a shorghum-sudangrass hybrid plant. This experimentwas conducted using a 1:1 ratio of fly ash to either sewage sludge,poultry manure, or dairy manure at six application rates. Our threeorganic wastes when mixed with fly ash at varied rates of applicationresulted in elevated concentrations of NO{sub 3}, P, K, Ca, Mg, Mn, Fe, B,Cu and Zn in both soil and plants. The data of this study indicated thatthe availability of elements to plants varied according to the organicsource mixed with fly ash and the rate of application. The elements Band Zn were observed to be significantly greater in plant tissuesexposed to fly ash/poultry manure or fly ash/dairy manure mixtures.Soils amended with fly ash/sewage sludge or poultry manure generallyimproved plant growth and enhanced yield when applied at rates of 25tons/acre, and decreased thereafter. However, soils amended with flyash/dairy manure improved plant growth and enhanced yield when appliedat rates upto 50 tons/acre and decreased thereafter. The decreases inyield beyond these application rates were probably due to theaccumulation of high levels of B and Zn which are phytotoxic and/orelevated levels of inorganic dissolved salts. 22 refs., 4 tabs.

Sajwan, K.S. [Savannah State College, GA (United States); Ornes, W.H.; Youngblood, T.V. [Univ. of South Carolina, Aiken, SC (United States)

1996-08-01T23:59:59.000Z

366

Detection of explosives in soils  

DOE Patents [OSTI]

An apparatus and method for detecting explosive-indicating compounds in subsurface soil. The apparatus has a probe with an adsorbent material on some portion of its surface that can be placed into soil beneath the ground surface, where the adsorbent material can adsorb at least one explosive-indicating compound. The apparatus additional has the capability to desorb the explosive-indicating compound through heating or solvent extraction. A diagnostic instrument attached to the probe detects the desorbed explosive-indicating compound. In the method for detecting explosive-indicating compounds in soil, the sampling probe with an adsorbent material on at least some portion of a surface of the sampling probe is inserted into the soil to contact the adsorbent material with the soil. The explosive-indicating compounds are then desorbed and transferred as either a liquid or gas sample to a diagnostic tool for analysis. The resulting gas or liquid sample is analyzed using at least one diagnostic tool selected from the group consisting of an ion-mobility spectrometer, a gas chromatograph, a high performance liquid chromatograph, a capillary electrophoresis chromatograph, a mass spectrometer, a Fourier-transform infrared spectrometer and a Raman spectrometer to detect the presence of explosive-indicating compounds.

Chambers, William B. (Edgewood, NM); Rodacy, Philip J. (Albuquerque, NM); Phelan, James M. (Bosque Farms, NM); Woodfin, Ronald L. (Sandia Park, NM)

2002-01-01T23:59:59.000Z

367

When Did the Atacama Desert Become Dry? : Geological Evidence for the late Pliocene onset of Hyperaridity  

E-Print Network [OSTI]

Dng - low erosion rates - ancient, well preserved landforms - unique, economically impt, salt accumulaDons (nitrate, lithium, borates, sulfates · Regional fluvial erosion history · Hillslope soils in the hyperarid zone

Elser, Jim

368

Physical properties of soils contaminated by oil lakes, Kuwait  

SciTech Connect (OSTI)

In preparation for a marine assault by the coalition forces, the Iraqi Army heavily mined Kuwait`s coastal zone and the oil fields. Over a million mines were placed on the Kuwait soil. Burning of 732 oil wells in the State of Kuwait due to the Iraqi invasion caused damages which had direct and indirect effect on environment. A total of 20-22 million barrels of spilled crude oil were collected in natural desert depressions and drainage network which formed more than 300 oil lakes. The total area covered with oil reached 49 km{sup 2}. More than 375 trenches revealed the existence of hard, massive caliche (CaCO{sub 3}) subsoil which prevent leached oil from reaching deeper horizons, and limited the maximum depth of penetration to 1.75 m. Total volume of soil contaminated reached 22,652,500 m{sup 3} is still causing environmental problems and needs an urgent cleaning and rehabilitation. Kuwait Oil Company has recovered approximately 21 million barrels from the oil lakes since the liberation of Kuwait. In our examined representative soil profiles the oil penetration was not deeper than 45 cm. Infiltration rate, soil permeability, grain size distribution, aggregates formation and water holding capacity were assessed. 15 refs., 5 figs., 5 tabs.

Mohammad, A.S. [Kuwait Univ., Safat (Kuwait); Wahba, S.A.; Al-Khatieb, S.O. [Arabian Gulf Univ. (Bahrain)

1996-08-01T23:59:59.000Z

369

DUS II SOIL GAS SAMPLING AND AIR INJECTION TEST RESULTS  

SciTech Connect (OSTI)

Soil vapor extraction (SVE) and air injection well testing was performed at the Dynamic Underground Stripping (DUS) site located near the M-Area Settling Basin (referred to as DUS II in this report). The objective of this testing was to determine the effectiveness of continued operation of these systems. Steam injection ended on September 19, 2009 and since this time the extraction operations have utilized residual heat that is present in the subsurface. The well testing campaign began on June 5, 2012 and was completed on June 25, 2012. Thirty-two (32) SVE wells were purged for 24 hours or longer using the active soil vapor extraction (ASVE) system at the DUS II site. During each test five or more soil gas samples were collected from each well and analyzed for target volatile organic compounds (VOCs). The DUS II site is divided into four parcels (see Figure 1) and soil gas sample results show the majority of residual VOC contamination remains in Parcel 1 with lesser amounts in the other three parcels. Several VOCs, including tetrachloroethylene (PCE) and trichloroethylene (TCE), were detected. PCE was the major VOC with lesser amounts of TCE. Most soil gas concentrations of PCE ranged from 0 to 60 ppmv with one well (VEW-22A) as high as 200 ppmv. Air sparging (AS) generally involves the injection of air into the aquifer through either vertical or horizontal wells. AS is coupled with SVE systems when contaminant recovery is necessary. While traditional air sparging (AS) is not a primary component of the DUS process, following the cessation of steam injection, eight (8) of the sixty-three (63) steam injection wells were used to inject air. These wells were previously used for hydrous pyrolysis oxidation (HPO) as part of the DUS process. Air sparging is different from the HPO operations in that the air was injected at a higher rate (20 to 50 scfm) versus HPO (1 to 2 scfm). . At the DUS II site the air injection wells were tested to determine if air sparging affected VOC soil gas concentrations during ASVE. Five (5) SVE wells that were located closest to the air injection wells were used as monitoring points during the air sparging tests. The air sparging tests lasted 48 hours. Soil gas sample results indicate that sparging did not affect VOC concentrations in four of the five sparging wells, while results from one test did show an increase in soil gas concentrations.

Noonkester, J.; Jackson, D.; Jones, W.; Hyde, W.; Kohn, J.; Walker, R.

2012-09-20T23:59:59.000Z

370

The effect of soil moisture levels on evapotranspiration from cotton and grain sorghum  

E-Print Network [OSTI]

measured value of soil t moisture. Substituting these values into Equations (I), (2) and (3) gave the following three equations: SM =be ct t SM =bK t t SM = d ? b log (t+c ) t (5) (6) The next logical step would have been to evaluate... as several atmospheres pressure which is sufficient tc move water to the leaves of even the tallest trees. The flew cf water can be governed by either the rate at which it is extracted from the soil or the rate at which it moves through the plants...

Schneider, Arland David

1964-01-01T23:59:59.000Z

371

Changes in soil carbon and nitrogen associated with switchgrass production  

E-Print Network [OSTI]

.), other forage grasses, cultivated crops, and forest were collected seasonally at six locations. Soil organic C (SOC), total N, soil microbial biomass C (SMBC) and N (SMBN), soil mineralizable C and N, and basal soil respiration (BSR) were in general...

Lobo Alonzo, Porfirio Jose

2004-11-15T23:59:59.000Z

372

Major Nitrogen Loss Pathways in Upland Blueberry Soils  

E-Print Network [OSTI]

2 O production in an arable peat soil in Central KalimantanTateyama brown forest soil + peat moss (1:1), SC- Soil +the tropical and boreal peat soils have a wide fungal

Vano, Imre

2009-01-01T23:59:59.000Z

373

Geochemical Rate/RNA Integration Study (GRIST): A Pilot Field Experiment for Inter-Calibration of Biogeochemistry and Nucleic Acid Measurements Final Report  

SciTech Connect (OSTI)

The Geochemical Rate/RNA Integration Study (GRIST) project sought to correlate biogeochemical flux rates with measurements of gene expression and mRNA abundance to demonstrate the application of molecular approaches to estimate the presence and magnitude of a suite of biogeochemical processes. The study was headed by Lee Kerkhoff of Rutgers University. In this component of the GRIST study, we characterized ambient nutrient concentrations and measured uptake rates for dissolved inorganic nitrogen (DIN, ammonium, nitrate and nitrite) and dissolved organic nitrogen (urea and dissolved free amino acids) during two diel studies at the Long-Term Ecosystem Observatory (LEO-15) on the New Jersey continental shelf.

Bronk, Deborah

2007-01-08T23:59:59.000Z

374

Soil samples at the APS  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmittedStatus Tom Fletcher,Future | Department of HowSoftware speedsSoilSoil

375

Rainwater Harvesting: Soil Storage and Infiltration System  

E-Print Network [OSTI]

A soil storage and infiltration system collects rainfall runoff from the roofs of buildings and directs it underground where it infiltrates the soil. Such a system conserves water and protects it from surface pollution. This publication describes...

Mechell, Justin; Lesikar, Bruce J.

2008-08-11T23:59:59.000Z

376

Irrigation Monitoring with Soil Water Sensors  

E-Print Network [OSTI]

Monitoring soil water content is essential if growers want to optimize production, conserve water, reduce environmental impacts and save money. This publication illustrates how soil moisture monitoring can improve irrigation decisions and how...

Enciso, Juan; Porter, Dana; Peries, Xavier

2007-01-19T23:59:59.000Z

377

FINGERPRINTING SOILS – A PROOF OF CONCEPT  

E-Print Network [OSTI]

Forensic soil characterization is an under-explored field in the forensic sciences. One aspect of forensic sciences is Locard’s Exchange Principle, which states that every contact leaves a trace. As soil characterization technology improves...

Kobylinski, Catherine

2011-05-06T23:59:59.000Z

378

BIOCYCLE JUNE 2002 41 ETAL contaminated soils  

E-Print Network [OSTI]

where smelter emissions or mine wastes caused con- tamination and soils were acidic. Such metal toxic the location of the main lead smelter, over 2,000 yards of soils have been excavated and replaced with clean

Brown, Sally

379

Maryland Soil Conservation Districts Law (Maryland)  

Broader source: Energy.gov [DOE]

It is the policy of the state to conserve the soil, water, and related resources of the state through establishing regulations for land-use practices related to soil erosion. This legislation...

380

Probabilistic Analysis of the Compressibility of Soils  

E-Print Network [OSTI]

of surface loads or variable soil deposits. In current practice, the analysis to determine settlements is deterministic. It assumes that the soil profile at a site is uniform from location to location, and only allows limited consideration of the variations...

Jung, Byoung C.

2010-07-14T23:59:59.000Z

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


381

Soil Carbon Sequestration and the Greenhouse Effect  

E-Print Network [OSTI]

Soil Carbon Sequestration and the Greenhouse Effect Second edition Rattan Lal & Ronald F. Follett. Printed in the United States of America. #12;181 Soil Carbon Sequestration and the Greenhouse Effect, 2nd

Archer, Steven R.

382

Graduate Kentucky Metropolitan Rate Application  

E-Print Network [OSTI]

Graduate Kentucky Metropolitan Rate Application REGISTRAR'S OFFICE University of Cincinnati PO Box Kentucky counties are able to attend UC at an established metropolitan tuition rate. Non Kentucky residency, these students are not eligible for the graduate metropolitan rate. Kentucky counties

Franco, John

383

Centennial black carbon turnover observed in a Russia steppe soil  

E-Print Network [OSTI]

the zonal steppe soils of Russia. J. Plant Nutr. Soil Sci. ,CD-ROM "Land Resources of Russia", International Institute

Hammes, K.

2010-01-01T23:59:59.000Z

384

Turning a negative into a positive: Researchers find promising use for excessive nitrate  

E-Print Network [OSTI]

acre of nitrogen for each inch of water applied. tx H2O | pg. 17 _ Turning a negative into a positive tx H2O | pg. 18 According to Sij, previous research has shown that properly designed and managed drip irrigation systems reduce deep percola... agencies involved in the project were local soil and water conservation districts, U.S. Department of Agriculture?s Natural Resources Conservation Service, the Texas AgriLife Extension Service, and Rolling Plains Groundwater Conservation District...

Wythe, Kathy

2009-01-01T23:59:59.000Z

385

Linking specific heterotrophic bacterial populations to bioreduction of uranium and nitrate using stable isotope probing in contaminated subsurface sediments  

SciTech Connect (OSTI)

Shifts in terminal electron-accepting processes during biostimulation of uranium-contaminated sediments were linked to the composition of stimulated microbial populations using DNA-based stable isotope probing. Nitrate reduction preceded U(VI) and Fe(III) reduction in [{sup 13}C]ethanol-amended microcosms. The predominant, active denitrifying microbial groups were identified as members of the Betaproteobacteria, whereas Actinobacteria dominated under metal-reducing conditions.

Akob, Denise M. [Florida State University; Kerkhof, Lee [Rutgers University; Kusel, Kirsten [Friedrich Schiller University Jena, Jena Germany; Watson, David B [ORNL; Palumbo, Anthony Vito [ORNL; Kostka, Joel [Florida State University

2011-01-01T23:59:59.000Z

386

The effect of soil hydraulic properties vs. soil texture in land surface models  

E-Print Network [OSTI]

depths in the soil column controls the partitioning of the two key energy fluxes of concern in climateThe effect of soil hydraulic properties vs. soil texture in land surface models E. D. Gutmann and E and difficulties in scaling existing data. In particular, the spatial distribution of Soil Hydraulic Properties

Small, Eric

387

Soil moisture and soil-litter mixing effects on surface litter decomposition: A controlled environment assessment  

E-Print Network [OSTI]

temperature and radiant energy levels and soil-litter mixing. Temperature and radiant energy effects on litterSoil moisture and soil-litter mixing effects on surface litter decomposition: A controlled University, Las Cruces, NM 88003, USA c Department of Plant and Soil Sciences, University of Kentucky

Archer, Steven R.

388

A dynamic organic soil biogeochemical model for simulating the effects of wildfire on soil environmental  

E-Print Network [OSTI]

of surface energy balance [Liu et al., 2005], soil thermal and hydrological regimes [MacKay, 1995; Burn, 1998A dynamic organic soil biogeochemical model for simulating the effects of wildfire on soil not comprehensively considered how interactions among fire disturbance, soil environmental conditions

Wagner, Diane

389

Managing Our Grandchildren's Forests: The Role of Soil Biology and Soil Ecology1  

E-Print Network [OSTI]

matter and energy, water and nutrients, organic matter, and gases. Soils within forest ecosystems supportManaging Our Grandchildren's Forests: The Role of Soil Biology and Soil Ecology1 James R. Boyle2 The papers of this volume provide some "nuggets" of insight into the complexity of soil biology and its

Standiford, Richard B.

390

Soil Biology & Biochemistry 39 (2007) 21382149 Heterogeneity of soil nutrients and subsurface biota  

E-Print Network [OSTI]

Author's personal copy Soil Biology & Biochemistry 39 (2007) 2138­2149 Heterogeneity of soil Laboratory, 999-W, Aiken, SC 29808, USA f Department of Plant & Soil Science, University of Vermont, Hills to have a highly heterogeneous distribution of nutrients and soil biota, with greater concentrations

Neher, Deborah A.

2007-01-01T23:59:59.000Z

391

UNL Microgravity: Team Fast Project: Lunar soil is much different from terrestrial soil,  

E-Print Network [OSTI]

UNL Microgravity: Team Fast Project: Lunar soil is much different from terrestrial soil, consisting of a large percentage of very fine particles. Lunar soil also contains very irregular and jagged particles formed from the sintering together of broked grains during micro-meteorite bombardment. NASA has soil

Farritor, Shane

392

Digital soil mapping: Towards a multiple-use Soil Information System D G Rossiter  

E-Print Network [OSTI]

Digital soil mapping: Towards a multiple-use Soil Information System D G Rossiter Senior University and remote sensing. However, mapping of soil types and characteristics has not fully shared in this revolution, because of the complexity of soil geography and the high cost of its direct obser- vation. None

Rossiter, D G "David"

393

Soil CO2 flux and photoautotrophic community composition in high-elevation, `barren' soil  

E-Print Network [OSTI]

Soil CO2 flux and photoautotrophic community composition in high-elevation, `barren' soil Kristen R of Colorado, Campus Box 450, Boulder, CO 80309, USA. Summary Soil-dominated ecosystems, with little-elevation, subnival zone soil (i.e. elevations higher than the zone of continuous vegetation), the structure

Hammerton, James

394

Differences in potassium forms between cutans and adjacent soil matrix in a Grey Clay Soil  

E-Print Network [OSTI]

Differences in potassium forms between cutans and adjacent soil matrix in a Grey Clay Soil Fan Liu1 , R. J. Gilkes, R. D. Hart, and A. Bruand2 Department of Soil Science and Plant Nutrition, Faculty are common fabric features in soil and represent foci of chemical and biological reactions. The influence

Boyer, Edmond

395

Holme et al. Soil Redox Sensor Networks RADIO FREQUENCY ENABLED SOIL REDOX POTENTIAL  

E-Print Network [OSTI]

Holme et al. Soil Redox Sensor Networks RADIO FREQUENCY ENABLED SOIL REDOX POTENTIAL SENSOR technologies that may be combined into a cost effective soil redox sensor network, discuss the merits of each as a component of said network, describe a prototype soil redox sensor network and perform basic laboratory

Rubinstein, Benjamin

396

Evaluating Soil Health Summary: Soil health can be measured, monitored and managed to increase sustainability and  

E-Print Network [OSTI]

Evaluating Soil Health Summary: Soil health can be measured, monitored and managed to increaseResourcesNonmedia, Producers, Web. From Sara Adlington, (406) 994-4602 Filename: Eval Soil Health PR2014 Web: Ag, Extension with Montana State University and MSU Extension have recommendations for growers on evaluating soil quality

Lawrence, Rick L.

397

Soil Biology & Biochemistry 38 (2006) 30013002 A synthesis of soil biodiversity and ecosystem functioning in  

E-Print Network [OSTI]

Soil Biology & Biochemistry 38 (2006) 3001­3002 Editorial A synthesis of soil biodiversity-free soils in Antarctica has exploded, drastically altering general perceptions about the diversity of life on this cold, dark and windy continent. In Victoria Land, Antarctica (701300 S to 78100S), where soil biota

Wall, Diana

2006-01-01T23:59:59.000Z

398

Bio-Char Soil Management on Highly Weathered Soils in the Humid Tropics  

E-Print Network [OSTI]

therefore have to be applied each year to sustain soil productivity. Management of black carbon (C36 Bio-Char Soil Management on Highly Weathered Soils in the Humid Tropics Johannes Lehmann1), ColombiaQ1 CONTENTS 36.1 Bio-Char Management and Soil Nutrient Availability

Lehmann, Johannes

399

Soil Science Society of America Journal Revealing Soil Structure and Functional Macroporosity  

E-Print Network [OSTI]

how fast water, greenhouse gases, vola- tile compounds, chemicals, and pollutants can enter and move ecosystem functions. In this study, soil physical measurements (soil-water retention and air permeability soil clay content, while significantly higher air permeability was observed for the l1 to l3 soils than

Wildenschild, Dorthe

400

Author's personal copy Soil total carbon analysis in Hawaiian soils with visible, near-infrared and  

E-Print Network [OSTI]

Author's personal copy Soil total carbon analysis in Hawaiian soils with visible, near-infrared reflectance spectroscopy Agriculture Hawaii Mid-infrared Soil carbon Visible near-infrared Accurate assessment of DRS for Ct prediction of Hawaiian ag- ricultural soils by creating visible, near-infrared (VNIR

Grunwald, Sabine

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


401

Kinetics of Ni Sorption in Soils: Roles of Soil Organic Matter and Ni Precipitation  

E-Print Network [OSTI]

sorption in soils may be controlled by different reaction mechanisms at various time scales be an important path for Ni sequestration in soils.9 The mechanisms of Ni-LDH formation have been investigatedKinetics of Ni Sorption in Soils: Roles of Soil Organic Matter and Ni Precipitation Zhenqing Shi

Sparks, Donald L.

402

Soil Science Society of America Journal Soil Sci. Soc. Am. J. 76:17191727  

E-Print Network [OSTI]

Soil Science Society of America Journal Soil Sci. Soc. Am. J. 76:1719­1727 doi:10.2136/sssaj2011.0303 Received 7 Sept. 2011. *Corresponding author (soils@msu.edu). © Soil Science Society of America, 5585 or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any

Schaetzl, Randall

403

Combined uranous nitrate production consisting of undivided electrolytic cell and divided electrolytic cell (Electrolysis ? Electrolytic cell)  

SciTech Connect (OSTI)

The electrochemical reduction of uranyl nitrate is a green, mild way to make uranous ions. Undivided electrolyzers whose maintenance is less but their conversion ratio and current efficiency are low, have been chosen. However, at the beginning of undivided electrolysis, high current efficiency can also be maintained. Divided electrolyzers' conversion ratio and current efficiency is much higher because the re-oxidation of uranous on anode is avoided, but their maintenance costs are more, because in radioactive environment the membrane has to be changed after several operations. In this paper, a combined method of uranous production is proposed which consists of 2 stages: undivided electrolysis (early stage) and divided electrolysis (late stage) to benefit from the advantages of both electrolysis modes. The performance of the combined method was tested. The results show that in combined mode, after 200 min long electrolysis (80 min undivided electrolysis and 120 min divided electrolysis), U(IV) yield can achieve 92.3% (500 ml feed, U 199 g/l, 72 cm{sup 2} cathode, 120 mA/cm{sup 2}). Compared with divided mode, about 1/3 working time in divided electrolyzer is reduced to achieve the same U(IV) yield. If 120 min long undivided electrolysis was taken, more than 1/2 working time can be reduced in divided electrolyzer, which means that about half of the maintenance cost can also be reduced. (authors)

Yuan, Zhongwei; Yan, Taihong; Zheng, Weifang; Li, Xiaodong; Yang, Hui; Xian, Liang [China Institute of Atomic Energy, P.O.Box 275-26, Beijing 102413 (China)

2013-07-01T23:59:59.000Z

404

Critical Parameters of Complex Geometries of Intersecting Cylinders Containing Uranyl Nitrate Solution  

SciTech Connect (OSTI)

About three dozen previously unreported critical configurations are presented for very complex geometries filled with high concentration enriched uranyl nitrate solution. These geometries resemble a tall, thin Central Column (or trunk of a ''tree'') having long, thin arms (or ''branches'') extending up to four directions off the column. Arms are equally spaced from one another in vertical planes, and that spacing ranges from arms in contact to quite wide spacings. Both the Central Column and the many different arms are critically safe by themselves with each, alone, is filled with fissile solution; but, in combination, criticality occurs due to the interactions between arms and the column. Such neutronic interactions formed the principal focus of this study. While these results are fresh to the nuclear criticality safety industry and to those seeking novel experiments against which to validate computer codes, the experiments, themselves, are not recent. Over 100 experiments were performed at the Rocky Flats Critical Mass Laboratory between September, 1967, and February of the following year.

J. B. Briggs (INEEL POC); R. E. Rothe

1999-06-14T23:59:59.000Z

405

Polyethylene encapsulatin of nitrate salt wastes: Waste form stability, process scale-up, and economics  

SciTech Connect (OSTI)

A polyethylene encapsulation system for treatment of low-level radioactive, hazardous, and mixed wastes has been developed at Brookhaven National Laboratory. Polyethylene has several advantages compared with conventional solidification/stabilization materials such as hydraulic cements. Waste can be encapsulated with greater efficiency and with better waste form performance than is possible with hydraulic cement. The properties of polyethylene relevant to its long-term durability in storage and disposal environments are reviewed. Response to specific potential failure mechanisms including biodegradation, radiation, chemical attack, flammability, environmental stress cracking, and photodegradation are examined. These data are supported by results from extensive waste form performance testing including compressive yield strength, water immersion, thermal cycling, leachability of radioactive and hazardous species, irradiation, biodegradation, and flammability. The bench-scale process has been successfully tested for application with a number of specific problem'' waste streams. Quality assurance and performance testing of the resulting waste form confirmed scale-up feasibility. Use of this system at Rocky Flats Plant can result in over 70% fewer drums processed and shipped for disposal, compared with optimal cement formulations. Based on the current Rocky Flats production of nitrate salt per year, polyethylene encapsulation can yield an estimated annual savings between $1.5 million and $2.7 million, compared with conventional hydraulic cement systems. 72 refs., 23 figs., 16 tabs.

Kalb, P.D.; Heiser, J.H. III; Colombo, P.

1991-07-01T23:59:59.000Z

406

Critical shear stresses in cohesive soils  

E-Print Network [OSTI]

CRITICAL SHEAR STRESSES IN COHESIVE SOILS A Thesis By ROBERT JAMES REKTORIK Approved as to style and content by: (Committee hairm g- c& ( ead of epartm ( mber) (Member) January 1964 ACKNOWLEDGMENTS I wish to acknowledge the guidance..., and Dummy Soil Sample 17 Typical Soil Samples after Scour Test, San Saba Clay 25 Typical Soil Samples after Scour Test, Houston Black Clay, K177 Regression of Critical Shearing Force on Per Cent Moisture . 31 10. Regression of Critical Shearing Force...

Rektorik, Robert James

1964-01-01T23:59:59.000Z

407

Oxidation of Organic Compounds in the Soil.  

E-Print Network [OSTI]

.................... ltudy by Means of Carbon Dioxide Formed 8 ............................... lomparison of . Various Materials 9 ...................................... lffect of Nature of Soil 14 ..................................... Ixidation of Soil Carbon 18... was drawn to take out the carbon dioxide. Althongl~ such experi- ments are well adapted to estimate carbon cliosicle, obviously, such con- ditions do not prevail in the soil, and while it is possible that Wollnp's conclusions may appl~r to the soil uncler...

Fraps, G. S. (George Stronach)

1915-01-01T23:59:59.000Z

408

Soil-Geomorphic Change during Desertification  

E-Print Network [OSTI]

soils mesquite coppice dunes #12;1750 1850 1950 2050 mesquite black grama Sandy Basin Floor Site #12

409

Long-term soil warming and Carbon Cycle Feedbacks to the Climate System  

SciTech Connect (OSTI)

The primary objective of the proposed research was to quantify and explain the effects of a sustained in situ 5oC soil temperature increase on net carbon (C) storage in a northeastern deciduous forest ecosystem. The research was done at an established soil warming experiment at the Harvard Forest in central Massachusetts – Barre Woods site established in 2001. In the field, a series of plant and soil measurements were made to quantify changes in C storage in the ecosystem and to provide insights into the possible relationships between C-storage changes and nitrogen (N) cycling changes in the warmed plots. Field measurements included: 1) annual woody increment; 2) litterfall; 3) carbon dioxide (CO2) efflux from the soil surface; 4) root biomass and respiration; 5) microbial biomass; and 6) net N mineralization and net nitrification rates. This research was designed to increase our understanding of how global warming will affect the capacity of temperate forest ecosystems to store C. The work explored how soil warming changes the interactions between the C and N cycles, and how these changes affect land-atmosphere feedbacks. This core research question framed the project – What are the effects of a sustained in situ 5oC soil temperature increase on net carbon (C) storage in a northeastern deciduous forest ecosystem? A second critical question was addressed in this research – What are the effects of a sustained in situ 5{degrees}C soil temperature increase on nitrogen (N) cycling in a northeastern deciduous forest ecosystem?

Melillo, Jerry M.

2014-04-30T23:59:59.000Z

410

The effect of rock fragments on the hydraulic properties of soils  

SciTech Connect (OSTI)

Many soils contain rock fragments the sizes of which are much larger than the average pore size of the sieved soil. Due to the fact that these fragments are often fairly large in relation to the soil testing apparatus, it is common to remove them before performing hydrologic tests on the soil. The question then arises as to whether or not there is a simple way to correct the laboratory-measured values to account for the fragments, so as to arrive at property values that can apply to the soil in situ. This question has arisen in the surface infiltration studies that are part of the site characterization program at Yucca Mountain, where accurate values of the hydraulic conductivities of near-surface soils are needed in order to accurately estimate infiltration rates. Although this problem has been recognized for some time, and numerous review articles have been written there are as yet no proven models to account for the effect of rock fragments on hydraulic conductivity and water retention. In this report we will develop some simple physically-based models to account for the effects of rock fragments on gross hydrological properties, and apply the resulting equations to experimental data taken from the literature. These models are intended for application to data that is currently being collected by scientists from the USGS on near-surface soils from Yucca Mountain.

Zimmerman, R.W.; Bodvarsson, G.S.

1995-04-01T23:59:59.000Z

411

PayneOklahoma SOIL SURVEY OF PAYNE COUNTY, OKLAHOMA  

E-Print Network [OSTI]

SOIL SURVEY OF PAYNE COUNTY, OKLAHOMA OSURR Headquarters 0 700 1,400 2,100 2,800350 Feet 0 200 400100 Meters Web Soil Survey 1.1 National Cooperative Soil Survey 5/7/2007 Page 1 of 4 #12;MAP INFORMATION SOIL Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov Coordinate System: UTM Zone 14 Soil Survey

Ghajar, Afshin J.

412

11:776:413 Soil Quality S. Murphy Page 1  

E-Print Network [OSTI]

: Soil Management & Sustainability, best management practices Week 4 Soil Degradation and resulting's dependence on soil To understand society's impact on soil and need for educated management To increase sequestration. Managing soil to build/maintain organic matter. Week 6 Chemical Indicators: soil pH, buffering

Chen, Kuang-Yu

413

Rates and Repayment Services  

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

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

414

Rates and Repayment Services  

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

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

415

Rating Agency Reports  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared at 278, 298, andEpidermal Growth Factor.Tariff Rates FY 2015

416

BCP Annual Rate Process  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScience Program CumulusA t i o nLiquids Reserve2015 BCP Annual Rate

417

Measurement Scheduling for Soil Moisture Sensing  

E-Print Network [OSTI]

energy consumption is presented; the paper is grounded in the physics of soil moisture. By David I Shuman off some inaccuracy in estimating soil moisture evolution for a significant reduction in energyINVITED P A P E R Measurement Scheduling for Soil Moisture Sensing: From Physical Models to Optimal

Mahajan, Aditya

418

Soil Properties That Distinguish Ecological Sites  

E-Print Network [OSTI]

Soil Properties That Distinguish Ecological Sites Mike Duniway USGS-Southwest Biological Science of vegetation? Why do sites differ in response to disturbance & management? #12;Ecological Sites & Soil Properties · Within a climatic zone (e.g. MLRA), differentiation of ecological sites based on soil

419

Common Questions Why should I soil test?  

E-Print Network [OSTI]

Common Questions Why should I soil test? Soil testing is an important diagnostic tool to evaluate nutrient imbalances and understand plant growth. The most important reason to soil test is to have a basis for intelligent application of fertilizer and lime. Testing also allows for growers and homeowners to maintain

Isaacs, Rufus

420

The Needs of Texas Soils for Lime.  

E-Print Network [OSTI]

Department of Agriculture. STS PAGE ............................................. What lime does 5 ............................................. Acidity of soils 7 ............................................. Sources of lime 8... of Texas soils for lime, as far as our present information permits. WHST LIME DOES Lime performs sereral functions in the soil, some of which are favor- able to increased crops and the maintenance of fertility, some favorable to certain crops...

Fraps, G. S. (George Stronach)

1919-01-01T23:59:59.000Z

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


421

Rangeland Sheet 6 Soil Quality Information Sheet  

E-Print Network [OSTI]

decomposition. Chemically stable organic matter gives soil its dark color and is generally the largest pool. Increasing levels of organic matter promote a higher water- holding capacity, which results in increasedRangeland Sheet 6 Soil Quality Information Sheet Rangeland Soil Quality--Organic Matter USDA

422

4, 38293862, 2007 Mechanisms of soil  

E-Print Network [OSTI]

BGD 4, 3829­3862, 2007 Mechanisms of soil carbon storage S. Steinbeiss et al. Title Page Abstract Biogeosciences Discussions is the access reviewed discussion forum of Biogeosciences Mechanisms of soil carbon­3862, 2007 Mechanisms of soil carbon storage S. Steinbeiss et al. Title Page Abstract Introduction

Boyer, Edmond

423

Sulfate induced heave in lime stabilized soil  

E-Print Network [OSTI]

The addition of hydrated lime to clay soils is one of the most common methods of soil stabilization. However, when sulfates are present in the soil, the calcium in the lime reacts with the sulfates to form ettringite, an expandable mineral...

Bredenkamp, Sanet

1994-01-01T23:59:59.000Z

424

9, 1443714473, 2012 Soil carbon drivers  

E-Print Network [OSTI]

BGD 9, 14437­14473, 2012 Soil carbon drivers and benchmarks in Earth system models K. E. O. Todd if available. Causes of variation in soil carbon predictions from CMIP5 Earth system models and comparison #12;BGD 9, 14437­14473, 2012 Soil carbon drivers and benchmarks in Earth system models K. E. O. Todd

Ickert-Bond, Steffi

425

Agricultural Management Practices And Soil Quality  

E-Print Network [OSTI]

Agricultural Management Practices And Soil Quality: Measuring, assessing, and comparing laboratory and field test kit indicators of soil quality attributes. Publication 452-400 #12;Agricultural Management Associate, respectively, Crop and Soil Environmental Sciences, Virginia Tech #12;1 Introduction What makes

Liskiewicz, Maciej

426

Soil phosphorus status and fertilizer use in select agricutural soils in Nicaragua  

E-Print Network [OSTI]

SOIL PHOSPHORUS STATUS AND FERTILIZER USE IN SELECT AGRICULTURAL SOILS IN NICARAGUA A Thesis by PATRICK G. NIEMEYER Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE August 2001 Major Subject: Soil Science SOIL PHOSPHORUS STATUS AND FERTILIZER USE IN SELECT AGRICULTURAL SOILS IN NICARAGUA A Thesis by PATRICK G. NIEMEYER Submitted to Texas A&M University in partial fulfillment...

Niemeyer, Patrick G

2001-01-01T23:59:59.000Z

427

Soil Science Minor To earn a Soil Science minor, students must complete the following courses to total 27 credits  

E-Print Network [OSTI]

Soil Science Minor To earn a Soil Science minor, students must complete the following courses to total 27 credits: I. Soil Core A. ______SOIL 205.Soil Science (4) or ____ CSS 305. Principles of Soil Science (4) [Taught at EOU La Grande campus only

Grünwald, Niklaus J.

428

Ice-lens formation and geometrical supercooling in soils and other colloidal materials  

E-Print Network [OSTI]

We present a new, physically-intuitive model of ice-lens formation and growth during the freezing of soils and other dense, particulate suspensions. Motivated by experimental evidence, we consider the growth of an ice-filled crack in a freezing soil. At low temperatures, ice in the crack exerts large pressures on the crack walls that will eventually cause the crack to split open. We show that the crack will then propagate across the soil to form a new lens. The process is controlled by two factors: the cohesion of the soil, and the geometrical supercooling of the water in the soil; a new concept introduced to measure the energy available to form a new ice lens. When the supercooling exceeds a critical amount (proportional to the cohesive strength of the soil) a new ice lens forms. This condition for ice-lens formation and growth does not appeal to any ad hoc, empirical assumptions, and explains how periodic ice lenses can form with or without the presence of a frozen fringe. The proposed mechanism is in good agreement with experiments, in particular explaining ice-lens pattern formation, and surges in heave rate associated with the growth of new lenses. Importantly for systems with no frozen fringe, ice-lens formation and frost heave can be predicted given only the unfrozen properties of the soil. We use our theory to estimate ice-lens growth temperatures obtaining quantitative agreement with the limited experimental data that is currently available. Finally we suggest experiments that might be performed in order to verify this theory in more detail. The theory is generalizable to complex natural-soil scenarios, and should therefore be useful in the prediction of macroscopic frost heave rates.

Robert W. Style; Stephen S. L. Peppin; Alan C. F. Cocks; John S. Wettlaufer

2011-09-09T23:59:59.000Z

429

Energy Management Through Innovative Rates  

E-Print Network [OSTI]

of energy efficiency in the industrial sector and specific rate design alternatives for doing so....

Williams, M. L.

1982-01-01T23:59:59.000Z

430

Development of site-specific soil cleanup criteria: New Brunswick Laboratory, New Jersey site  

SciTech Connect (OSTI)

The potential human exposure which results from the residual soil radioactivity at a decommissioned site is a prime concern during D and D projects. To estimate this exposure, a pathway analysis approach is often used to arrive at the residual soil radioactivity criteria. The development of such a criteria for the decommissioning of the New Brunswick Laboratory, New Jersey site is discussed. Contamination on this site was spotty and located in small soil pockets spread throughout the site area. Less than 1% of the relevant site area was contaminated. The major contaminants encountered at the site were /sup 239/Pu, /sup 241/Am, normal and natural uranium, and natural thorium. During the development of the pathway analysis to determine the site cleanup criteria, corrections for the inhomogeneity of the contamination were made. These correction factors and their effect upon the relevant pathway parameters are presented. Major pathways by which radioactive material may reach an individual are identified and patterns of use are specified (scenario). Each pathway is modeled to estimate the transfer parameters along the given pathway, such as soil to air to man, etc. The transfer parameters are then combined with dose rate conversion factors (ICRP 30 methodology) to obtain soil concentration to dose rate conversion factors (pCi/g/mrem/yr). For an appropriate choice of annual dose equivalent rate, one can then arrive at a value for the residual soil concentration. Pathway modeling, transfer parameters, and dose rate factors for the three major pathways; inhalation, ingestion and external exposure, which are important for the NBL site, are discussed.

Veluri, V.R.; Moe, H.J.; Robinet, M.J.; Wynveen, R.A.

1983-03-01T23:59:59.000Z

431

Vitrification testing of soil fines from contaminated Hanford 100 Area and 300 Area soils  

SciTech Connect (OSTI)

The suitability of Hanford soil for vitrification is well known and has been demonstrated extensively in other work. The tests reported here were carried out to confirm the applicability of vitrification to the soil fines (a subset of the Hanford soil potentially different in composition from the bulk soil) and to provide data on the performance of actual, vitrified soil fines. It was determined that the soil fines were generally similar in composition to the bulk Hanford soil, although the fraction <0.25 mm in the 100 Area soil sample appears to differ somewhat from the bulk soil composition. The soil fines are readily melted into a homogeneous glass with the simple additions of CaO and/or Na{sub 2}O. The vitrified waste (plus additives) occupies only 60% of the volume of the initial untreated waste. Leach testing has shown the glasses made from the soil fines to be very durable relative to natural and man-made glasses and has demonstrated the ability of the vitrified waste to greatly reduce the release of radionuclides to the environment. Viscosity and electrical conductivity measurements indicate that the soil fines will be readily processable, although with levels of additives slightly greater than used in the radioactive melts. These tests demonstrate the applicability of vitrification to the contaminated soil fines and the exceptional performance of the waste form resulting from the vitrification of contaminated Hanford soils.

Ludowise, J.D.

1994-05-01T23:59:59.000Z

432

Nitrogen Addition Increases Carbon Storage in Soils, But Not in Trees, in  

E-Print Network [OSTI]

nitrogen (N) species and car- bon dioxide (CO2) in the atmosphere globally. Received 18 August 2012Nitrogen Addition Increases Carbon Storage in Soils, But Not in Trees, in an Eastern U.S. Deciduous regions receive elevated rates of atmospheric nitrogen (N) deposition from air pollution. To evalu- ate

Templer, Pamela

433

A Study of Mechanisms and Supression of Evaporation of Water from Soils  

E-Print Network [OSTI]

and environmental parameters on the effectiveness of the crude oil-treated surfaces. Rates studied included 946, 2038, and 4730 l/ha (100, 300, and 500 gal/acre). Two mechanisms of suppression are apparently involved when crude oil is applied to a smooth wet soil...

Wendt, C. W.

434

Long-Term Hydrologic Responses To Shrub Removal In A SW Texas Rangeland: Using Soil Chloride To Estimate Deep Drainage  

E-Print Network [OSTI]

LONG-TERM HYDROLOGIC RESPONSES TO SHRUB REMOVAL IN A SW TEXAS RANGELAND: USING SOIL CHLORIDE TO ESTIMATE DEEP DRAINAGE A Thesis by DAVID ANTHONY BARRE Submitted to the Office of Graduate Studies of Texas A&M University... of the study were to identify those biotic and abiotic factors facilitating deep drainage and to examine differences in recharge for the years following clearing of natural shrub vegetation. Soil chloride was examined to estimate long-term recharge rates...

Barre, David Anthony

2010-10-12T23:59:59.000Z

435

Review of soil contamination guidance  

SciTech Connect (OSTI)

A review of existing and proposed radioactive soil contamination standards and guidance was conducted for United Nuclear Corporation (UNC), Office of Surplus Facilities Management. Information was obtained from both government agencies and other sources during a literature survey. The more applicable standards were reviewed, evaluated, and summarized. Information pertaining to soil contamination for both facility operation and facility decommissioning was obtained from a variety of sources. These sources included: the Code of Federal Regulations, regulatory guides, the Federal Register, topical reports written by various government agencies, topical reports written by national laboratories, and publications from the American National Standards Institute (ANSI). It was difficult to directly compare the standards and guidance obtained from these sources since each was intended for a specific situation and different units or bases were used. However, most of the information reviewed was consistent with the philosophy of maintaining exposures at levels as low as reasonably achievable (ALARA).

Mueller, M.A.; Kennedy, W.E. Jr.; Soldat, J.K.

1981-08-01T23:59:59.000Z

436

National Utility Rate Database: Preprint  

SciTech Connect (OSTI)

When modeling solar energy technologies and other distributed energy systems, using high-quality expansive electricity rates is essential. The National Renewable Energy Laboratory (NREL) developed a utility rate platform for entering, storing, updating, and accessing a large collection of utility rates from around the United States. This utility rate platform lives on the Open Energy Information (OpenEI) website, OpenEI.org, allowing the data to be programmatically accessed from a web browser, using an application programming interface (API). The semantic-based utility rate platform currently has record of 1,885 utility rates and covers over 85% of the electricity consumption in the United States.

Ong, S.; McKeel, R.

2012-08-01T23:59:59.000Z

437

An investigation of soil-tool interaction theories as they apply to a Lunar soil simulant  

E-Print Network [OSTI]

developed for finding the force required to fail soil with a blade, given the appropriate parameters of the blade, the soil, and their interaction. The properties of interest in the Lunar soil are presented in this thesis. Then the parameters of a... terrestrial analog of the true Lunar soil is determined. Given these, the predictive models are implemented to predict the required force to fail the Lunar soil simulant with a flat blade. An apparatus is developed to fail the prepared Lunar soil simulant...

Willman, Brian Michael

1992-01-01T23:59:59.000Z

438

Plant-soil interactions and acclimation to temperature of microbial-mediated soil respiration may affect predictions of soil CO2 efflux  

E-Print Network [OSTI]

shifts in microbial communities due to soil warming.Soil Sci Soc Am J 61:475–481to an important portion of soil CO 2 ef?ux (Hanson et al.

Curiel Yuste, J.; Ma, S.; Baldocchi, D. D.

2010-01-01T23:59:59.000Z

439

E-Print Network 3.0 - annual soil respiration Sample Search Results  

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

Sciences and Ecology 4 Summary Soil respiration is controlled by soil temperature, soil water, fine roots, microbial activity, and soil physical and Summary: into the model; and...

440

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

SciTech Connect (OSTI)

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

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

2010-06-10T23:59:59.000Z

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


441

Water balance of sandy soils of Niger, West Africa  

E-Print Network [OSTI]

indicate that for these soils 1) Sand contents vary from 85 to 95() and clay contents from 2 to 14(). Bulk densities range -3 from 1. 50 to 1. 68 Mg m . Infiltration rates were from 8. 33 to 10. 60 x 10 m s . A 2. 0 m profile can hold approximately 160... The Evaporative Demand of the Atmosphere Bare Fallow and Post-Harvest Mulching Summary MATERIALS AND METHODS 29 32 35 36 38 1X Site Selection Physical and Hydrological Properties Potential Evapotranspiration Water Balance Bare Fallow and Post...

Payne, William Albert

1987-01-01T23:59:59.000Z

442

Effect of soil erosion on the long-term stability of FUSRAP near-surface waste-burial sites  

SciTech Connect (OSTI)

Decontamination of FUSRAP sites could result in the generation of large volumes (in excess of 400,000 m/sup 3/) of low-activity radioactive wastes (primarily contaminated soil and building materials) requiring subsequent disposal. It is likely that near-surface burial will be seriously considered as an option for disposal of these materials. A number of factors - including soil erosion - could adversely affect the long-term stability of a near-surface waste-burial site. The majority of FUSRAP sites are located in the humid eastern United States, where the principal cause of erosion is the action of water. This report examines the effect of soil erosion by water on burial-site stability based on analysis of four hypothetical near-surface burial sites. The Universal Soil Loss Equation was employed to estimate average annual soil loss from burial sites and the 1000-year effects of soil loss on the soil barrier (burial trench cap) placed over low-activity wastes. Results suggest that the land use of the burial site and the slope gradient of the burial trench cap significantly affect the rate of soil erosion. The development of measures limiting the potential land use of a burial site (e.g., mixing large rocks into the burial trench cap) may be required to preserve the integrity of a burial trench for long periods of time.

Knight, M.J.

1983-04-01T23:59:59.000Z

443

FLUIDIZED BED STEAM REFORMING MINERALIZATION FOR HIGH ORGANIC AND NITRATE WASTE STREAMS FOR THE GLOBAL NUCLEAR ENERGY PARTNERSHIP  

SciTech Connect (OSTI)

Waste streams that may be generated by the Global Nuclear Energy Partnership (GNEP) Advanced Energy Initiative may contain significant quantities of organics (0-53 wt%) and/or nitrates (0-56 wt%). Decomposition of high nitrate streams requires reducing conditions, e.g. organic additives such as sugar or coal, to reduce the NO{sub x} in the off-gas to N{sub 2} to meet the Clean Air Act (CAA) standards during processing. Thus, organics will be present during waste form stabilization regardless of which GNEP processes are chosen, e.g. organics in the feed or organics for nitrate destruction. High organic containing wastes cannot be stabilized with the existing HLW Best Developed Available Technology (BDAT) which is HLW vitrification (HLVIT) unless the organics are removed by preprocessing. Alternative waste stabilization processes such as Fluidized Bed Steam Reforming (FBSR) operate at moderate temperatures (650-750 C) compared to vitrification (1150-1300 C). FBSR converts organics to CAA compliant gases, creates no secondary liquid waste streams, and creates a stable mineral waste form that is as durable as glass. For application to the high Cs-137 and Sr-90 containing GNEP waste streams a single phase mineralized Cs-mica phase was made by co-reacting illite clay and GNEP simulated waste. The Cs-mica accommodates up to 30% wt% Cs{sub 2}O and all the GNEP waste species, Ba, Sr, Rb including the Cs-137 transmutation to Ba-137. For reference, the cesium mineral pollucite (CsAlSi{sub 2}O{sub 6}), currently being studied for GNEP applications, can only be fabricated at {ge} 1000 C. Pollucite mineralization creates secondary aqueous waste streams and NO{sub x}. Pollucite is not tolerant of high concentrations of Ba, Sr or Rb and forces the divalent species into different mineral host phases. The pollucite can accommodate up to 33% wt% Cs{sub 2}O.

Jantzen, C; Michael Williams, M

2008-01-11T23:59:59.000Z

444

Highly Enriched Uranyl Nitrate in Annular Tanks with Concrete Reflection: 1 x 3 Line Array of Nested Pairs of Tanks  

SciTech Connect (OSTI)

A series of seven experiments were performed at the Rocky Flats Critical Mass Laboratory beginning in August, 1980 (References 1 and 2). Highly enriched uranyl nitrate solution was introduced into a 1-3 linear array of nested stainless steel annular tanks. The tanks were inside a concrete enclosure, with various moderator and absorber materials placed inside and/or between the tanks. These moderators and absorbers included boron-free concrete, borated concrete, borated plaster, and cadmium. Two configurations included placing bottles of highly enriched uranyl nitrate between tanks externally. Another experiment involved nested hemispheres of highly enriched uranium placed between tanks externally. These three configurations are not evaluated in this report. The experiments evaluated here are part of a series of experiments, one set of which is evaluated in HEU-SOL-THERM-033. The experiments in this and HEU-SOL-THERM-033 were performed similarly. They took place in the same room and used the same tanks, some of the same moderators and absorbers, some of the same reflector panels, and uranyl nitrate solution from the same location. There are probably additional similarities that existed that are not identified here. Thus, many of the descriptions in this report are either the same or similar to those in the HEU-SOL-THERM-033 report. Seventeen configurations (sixteen of which were critical) were performed during seven experiments; six of those experiments are evaluated here with thirteen configurations. Two configurations were identical, except for solution height, and were conducted to test repeatability. The solution heights were averaged and the two were evaluated as one configuration, which gives a total of twelve evaluated configurations. One of the seventeen configurations was subcritical. Of the twelve critical configurations evaluated, nine were judged as acceptable as benchmarks.

James Cleaver; John D. Bess; Nathan Devine; Fitz Trumble

2009-09-01T23:59:59.000Z

445

2007 Wholesale Power Rate Schedules : 2007 General Rate Schedule Provisions.  

SciTech Connect (OSTI)

This schedule is available for the contract purchase of Firm Power to be used within the Pacific Northwest (PNW). Priority Firm (PF) Power may be purchased by public bodies, cooperatives, and Federal agencies for resale to ultimate consumers, for direct consumption, and for Construction, Test and Start-Up, and Station Service. Rates in this schedule are in effect beginning October 1, 2006, and apply to purchases under requirements Firm Power sales contracts for a three-year period. The Slice Product is only available for public bodies and cooperatives who have signed Slice contracts for the FY 2002-2011 period. Utilities participating in the Residential Exchange Program (REP) under Section 5(c) of the Northwest Power Act may purchase Priority Firm Power pursuant to the Residential Exchange Program. Rates under contracts that contain charges that escalate based on BPA's Priority Firm Power rates shall be based on the three-year rates listed in this rate schedule in addition to applicable transmission charges. This rate schedule supersedes the PF-02 rate schedule, which went into effect October 1, 2001. Sales under the PF-07 rate schedule are subject to BPA's 2007 General Rate Schedule Provisions (2007 GRSPs). Products available under this rate schedule are defined in the 2007 GRSPs. For sales under this rate schedule, bills shall be rendered and payments due pursuant to BPA's 2007 GRSPs and billing process.

United States. Bonneville Power Administration.

2006-11-01T23:59:59.000Z

446

Soil Erosion and Sediment Control Act, Soil and Water Conservation District, and Council on Soil and Water Conservation Regulations (Connecticut)  

Broader source: Energy.gov [DOE]

These regulations establish Soil and Water Conservation Districts throughout the State of Connecticut. Each district has its own Board of Directors; membership and election procedures are defined...

447

Passive soil venting at the Chemical Waste Landfill Site at Sandia National Laboratories, Albuquerque, New Mexico  

SciTech Connect (OSTI)

Passive Soil Vapor Extraction was tested at the Chemical Waste Landfill (CWL) site at Sandia National Laboratories, New Mexico (SNLIW). Data collected included ambient pressures, differential pressures between soil gas and ambient air, gas flow rates into and out of the soil and concentrations of volatile organic compounds (VOCS) in vented soil gas. From the differential pressure and flow rate data, estimates of permeability were arrived at and compared with estimates from other studies. Flow, differential pressure, and ambient pressure data were collected for nearly 30 days. VOC data were collected for two six-hour periods during this time. Total VOC emissions were calculated and found to be under the limit set by the Resource Conservation and Recovery Act (RCRA). Although a complete process evaluation is not possible with the data gathered, some of the necessary information for designing a passive venting process was determined and the important parameters for designing the process were indicated. More study is required to evaluate long-term VOC removal using passive venting and to establish total remediation costs when passive venting is used as a polishing process following active soil vapor extraction.

Phelan, J.M.; Reavis, B.; Cheng, W.C.

1995-05-01T23:59:59.000Z

448

Effect of calcium nitrate on the vapor-liquid equilibria of ethanol + water and 2-propanol + water  

SciTech Connect (OSTI)

The effect of calcium nitrate on the vapor-liquid equilibria of ethanol + water and 2-propanol + water was studied using a Swietoslawski ebulliometer. The measurements were performed for two constant salt molalities (1 and 2 mol[center dot]kg[sup [minus]1]) under isobaric conditions at 50.66 kPa. Strong salting-out of the alcohol was observed in all cases, leading to a complete elimination of the azeotropic point at relatively low salt concentrations. The results were correlated using an extension of the NRTL equation for mixed solvent electrolyte systems proposed by Mock, Evans, and Chen.

Polka, H.M.; Gmehling, J. (Univ. of Oldenburg (Germany). Chair of Industrial Chemistry)

1994-07-01T23:59:59.000Z

449

Dietary nitrate increases arginine availability and protects mitochondrial complex I and energetics in the hypoxic rat heart  

E-Print Network [OSTI]

, before thorough vortexing and centrifugation at 13,000 x g for 15 min. The aqueous and organic fractions were removed and aliquoted into separate 2 mL tubes and kept on ice. A further 600 µL 2:1 methanol:chloroform was added to protein pellet... : ajm267@cam.ac.uk Keywords: Hypoxia; Mitochondria; Energy Metabolism Word count: 6589 (exc. references, figure legends, table) TOC category: Cardiovascular Ashmore et al: Dietary nitrate and the hypoxic heart 2 Key points summary...

Ashmore, Tom; Fernandez, Bernadette O.; Branco-Price, Cristina; West, James A.; Cowburn, Andrew S.; Heather, Lisa C.; Griffin, Julian L.; Johnson, Randall S.; Feelisch, Martin; Murray, Andrew J.

2014-01-01T23:59:59.000Z

450

The behavior of soil-applied cyclotri- and cyclotetraphosphate in Texas soils  

E-Print Network [OSTI]

Cyclotriphosphate (C3P) is of interest to soil scientists because it demonstrates little or no retention by soil constituents. Non-sorption is desirable in the development of mobile P fertilizers. Work was expanded to include cyclotetraphosphate...

Trostle, Calvin Lewie

2012-06-07T23:59:59.000Z

451

Soil macroaggregate dynamics in a mountain spatial climate gradient  

E-Print Network [OSTI]

Soil macroaggregate dynamics in a mountain spatial climate gradient Lauric Cécillon1,2,* , Nilvania://lauric.cecillon.free.fr/ Key words: Mountain soils; Climate change; Soil aggregation; Soil organic matter; Near infrared reflectance spectroscopy; Soil threats Biogeochemistry 97: 31-43 (2010) http://dx.doi.org/10.1007/s10533

Paris-Sud XI, Université de

452

Soil maps of Wisconsin Alfred E. Hartemink a,  

E-Print Network [OSTI]

Soil maps of Wisconsin Alfred E. Hartemink a, , Birl Lowery a , Carl Wacker b a University of Wisconsin-Madison, Department of Soil Science, FD Hole Soils Lab, 1525 Observatory Drive, Madison, WI 53706 May 2012 Accepted 15 May 2012 Available online xxxx Keywords: Soil maps Historical maps Digital soil

Mladenoff, David

453

CROP & SOIL SCIENCES Statewide Variety Testing Program Coordinator  

E-Print Network [OSTI]

CROP & SOIL SCIENCES Statewide Variety Testing Program Coordinator Committee Membership Dr. Jerry Johnson - committee chair Dr. Paul Raymer Department of Crop & Soil Sciences Department of Crop & Soil Department of Crop & Soil Sciences Department of Crop & Soil Sciences University of Georgia University

Arnold, Jonathan

454

Expanded Course Description for 11:776:413 Soil Quality  

E-Print Network [OSTI]

Soil Quality: soil management & sustainability, concept of best management practices (BMPs) Soil and restoration of desirable properties will be addressed. Management of our soil resource to maintain or improve soil quality and maximize ecosystem sustainability will be emphasized. Learning Goals: To gain full

Chen, Kuang-Yu

455

SOIL QUALITY (SWS 6134) 3 Credits-Fall 2014  

E-Print Network [OSTI]

with basic concepts, principles, components, measurements, and evaluation of soil quality and its management for sustainable agriculture. Soil quality is the capacity of the soil to function within the ecosystem boundaries. In this course, state-of-the-art studies on soil quality and the principles, assessment and management of soil

Ma, Lena

456

The Chemical Composition of Some Texas Soils.  

E-Print Network [OSTI]

TEXAS AGRICULTURAL ESPERlMENT STATIONS. ______-_________- _-__---- - -. - _ _._ __ BULLETlN NO. 100. Chemical Section, Dec., 1907. The Chemical Composition of Some Texas Soils BY G. S. FRAPS, 'Ph. D., Chemist. POSTOFFICE COLLEGE STATION.... The postoffice address is College, Station, Texas. Reports and bulletins are sent free upon application to the Director. THE CHEMICAL COMPOSITION OF SOME TEXAS SOILS. BY G. S. FRAPS. This bulletin is a popular account of a study of a nnmber of Texas soils...

Fraps, G. S. (George Stronach)

1907-01-01T23:59:59.000Z

457

Water as a Reagent for Soil Remediation  

SciTech Connect (OSTI)

SRI International conducted experiments in a two-year, two-phase process to develop and evaluate hydrothermal extraction technology, also known as hot water extraction (HWE) technology, for remediating petroleum-contaminated soils. The bench-scale demonstration of the process has shown great promise, and the implementation of this technology will revolutionize the conventional use of water in soil remediation technologies and provide a standalone technology for removal of both volatile and heavy components from contaminated soil.

Jayaweera, Indira S.; Marti-Perez, Montserrat; Diaz-Ferrero, Jordi; Sanjurjo, Angel

2003-03-06T23:59:59.000Z

458

Performance evaluation soil samples utilizing encapsulation technology  

DOE Patents [OSTI]

Performance evaluation soil samples and method of their preparation uses encapsulation technology to encapsulate analytes which are introduced into a soil matrix for analysis and evaluation by analytical laboratories. Target analytes are mixed in an appropriate solvent at predetermined concentrations. The mixture is emulsified in a solution of polymeric film forming material. The emulsified solution is polymerized to form microcapsules. The microcapsules are recovered, quantitated and introduced into a soil matrix in a predetermined ratio to form soil samples with the desired analyte concentration. 1 fig.

Dahlgran, J.R.

1999-08-17T23:59:59.000Z

459

Performance evaluation soil samples utilizing encapsulation technology  

DOE Patents [OSTI]

Performance evaluation soil samples and method of their preparation using encapsulation technology to encapsulate analytes which are introduced into a soil matrix for analysis and evaluation by analytical laboratories. Target analytes are mixed in an appropriate solvent at predetermined concentrations. The mixture is emulsified in a solution of polymeric film forming material. The emulsified solution is polymerized to form microcapsules. The microcapsules are recovered, quantitated and introduced into a soil matrix in a predetermined ratio to form soil samples with the desired analyte concentration.

Dahlgran, James R. (Idaho Falls, ID)

1999-01-01T23:59:59.000Z

460

Microbial and Mineralogical Characterizations of Soils Collected...  

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

gold mines. Citation: Rastogi G, S Osman, RK Kukkadapu, MH Engelhard, PA Vaishampayan, GL Andersen, and RK Sani.2010."Microbial and Mineralogical Characterizations of Soils...

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


461

Tank farm backlog soil sample analysis plan  

SciTech Connect (OSTI)

This document describes the measures to collect samples, perform testing on samples, and make decisions to obtain a Contained- in Determination for tank farms backlog soil.

Ahlers, J.D., Westinghouse Hanford

1996-07-17T23:59:59.000Z

462

Pullman Soils: Distribution, Importance, Variability, and Management.  

E-Print Network [OSTI]

soils in Texas is bounded by the New Mexico-Texas state line on the west, the Canadian River on the north, and the caprock escarpment at the High Plains-Rolling Plains boundary on the east. A catena of loamy soils extending from Farwell to near...). The portions of different counties occupied by Pullman soil range from about 0.1 to 70 percent (Table 2). The area of Pullman soils is bounded by the New Mexico- Texas state line on the west, the caprock escarpment at the Canadian River on the north...

Unger, Paul W.; Pringle, Fred B

1981-01-01T23:59:59.000Z

463

The Inverted Block Rate:The Inverted Block Rate: An Alternative to Flat Rate BillingAn Alternative to Flat Rate Billing  

E-Print Network [OSTI]

The Inverted Block Rate:The Inverted Block Rate: An Alternative to Flat Rate BillingAn Alternative;Inverted Block RateInverted Block Rate 22 IntroductionIntroduction ·· Modern societies rely on electrical collectionMetering and Rate Models facilitate collection #12;Inverted Block RateInverted Block Rate 33 Rate

Hughes, Larry

464

Adsorption and desorption kinetics of cesium in an organic matter-rich soil saturated with different cations  

SciTech Connect (OSTI)

The fallout from nuclear weapons tests conducted on Bikini Atoll Island in 1954 resulted in contamination of soil with Cesium 137. To develop effective regimes for decontaminating the Bikini Atoll soil, the exchange of Cs for K, Na, and other cations on the soil must be understood. Samples of soils made homoionic with K, Na, or Ca were reacted with solutions containing Cs ions, and the quantities of Cs sorbed and the rates of exchange were measured. The samples were then reacted with solutions containing K, Na, or Ca, and the quantities of Cs desorbed and the rates of exchange were again measured. Samples made homoionic with Na had a greater ion exchange capacity than samples made homoionic with K, and, in both cases, the ion exchange capacity increased with the organic matter content of the soil. For samples pretreated with Ca, the ion exchange capacity is not related in a simple way to the organic matter content. The kinetics were assessed by plotting the rate of exchange vs. the time and vs. the quantity exchanged. A first-order equation was obeyed during most of the run in Cs desorption experiments and during a limited part of the run in Cs adsorption experiments. An increase in the rate of Cs exchange was observed at the beginning of the experiments especially for Cs adsorption. This increase is presumably due to an increase of the ionic strength of the liquid phase during the exchange process. 33 refs., 9 figs., 2 tabs.

Aharoni, C. (Technion-Israel Inst. of Technology, Haifa (Israel)); Pasricha, N.S. (Punjab Agricultural Univ., Ludihana (India)); Sparks, D.L. (Univ. of Delaware, Newark, DE (United States))

1993-10-01T23:59:59.000Z

465

Asymptotic Cellular Growth Rate as the Effective Information Utilization Rate  

E-Print Network [OSTI]

We study the average asymptotic growth rate of cells in randomly fluctuating environments. Using a game-theoretic perspective, we show that any response strategy has an asymptotic growth rate, which is the sum of: (i) the maximal growth rate at the worst possible distribution of environments, (ii) relative information between the actual distribution of environments to the worst one, and (iii) information utilization rate which is the information rate of the sensory devices minus the "information dissipation rate", the amount of information not utilized by the cell for growth. In non-stationary environments, the optimal strategy is the time average of the instantaneous optimal strategy and the optimal switching times are evenly spaced in the statistical (Fisher) metric.

Pugatch, Rami; Tlusty, Tsvi

2013-01-01T23:59:59.000Z

466

Elevated CO2 stimulates grassland soil respiration by increasing carbon inputs rather than by enhancing soil  

E-Print Network [OSTI]

Elevated CO2 stimulates grassland soil respiration by increasing carbon inputs rather than It is not clear whether the consistent positive effect of elevated CO2 on soil respiration (soil carbon flux, SCF) results from increased plant and microbial activity due to (i) greater C availability through CO2-induced

Minnesota, University of

467

Applied Soil Ecology 21 (2002) 7188 Soil invertebrate and microbial communities, and decomposition  

E-Print Network [OSTI]

Applied Soil Ecology 21 (2002) 71­88 Soil invertebrate and microbial communities, and decomposition. Spongberg Department of Earth, Ecological and Environmental Sciences, University of Toledo, Toledo, OH 43606 for quantification of ecological impact of chemical contamination of soils. This study examined the effects

Neher, Deborah A.

468

Soil Science Society of America Journal Soil Sci. Soc. Am. J. 76:23272341  

E-Print Network [OSTI]

Soil Science Society of America Journal Soil Sci. Soc. Am. J. 76:2327­2341 doi:10.2136/sssaj2012.0043 Received 3 Feb. 2012. *Corresponding author (sabgru@ufl.edu). © Soil Science Society of America, 5585 or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any

Grunwald, Sabine

469

Soil compaction: track induced soil stress isn't so positive in comparison with tyre  

E-Print Network [OSTI]

Soil compaction: track induced soil stress isn't so positive in comparison with tyre Ingeniors presence and the overall higher load of the track system. Conversely, tyres distribute uniformly the load the easy to obtain contact area surface of the track -or tyre- with the soil, the interface pressure

Boyer, Edmond

470

Part I. Ecological Sites and Soil Part II. A Framework for Soil and  

E-Print Network [OSTI]

on management (states) (1) (2) (3) (4) (6) (5) #12;State and transition models, by definition, include soil #12;Part II. Ecological sites and state and transition models: A framework for soil and vegetation dynamics and management #12;The soil survey is the foundation of the ecological site inventory process

471

Soil Science Society of America Journal Soil Sci. Soc. Am. J. 78:14581468  

E-Print Network [OSTI]

. Ithaca, NY 14853 John J. Battles Dep. of Environmental Science, Policy and Management Univ. of California was transported downward through the forest floor and upper mineral soil in a progressive fashion. By Year 11Soil Science Society of America Journal Soil Sci. Soc. Am. J. 78:1458­1468 doi:10.2136/sssaj2014

Battles, John

472

EFFECTS OF COMPOST AND LIME APPLICATION ON SOIL CHEMICAL PROPERTIES, SOIL MICROBIAL COMMUNITY, AND FUSARIUM WILT IN  

E-Print Network [OSTI]

1 EFFECTS OF COMPOST AND LIME APPLICATION ON SOIL CHEMICAL PROPERTIES, SOIL MICROBIAL COMMUNITY compost as an antagonistic suppression approach to combat soil-borne disease effects on crop yields the effect of compost and lime on soil chemical properties, the soil microbial community (including Fusarium

Ma, Lena

473

Standard test method for gamma energy emission from fission products in uranium hexafluoride and uranyl nitrate solution  

E-Print Network [OSTI]

1.1 This test method covers the measurement of gamma energy emitted from fission products in uranium hexafluoride (UF6) and uranyl nitrate solution. It is intended to provide a method for demonstrating compliance with UF6 specifications C 787 and C 996 and uranyl nitrate specification C 788. 1.2 The lower limit of detection is 5000 MeV Bq/kg (MeV/kg per second) of uranium and is the square root of the sum of the squares of the individual reporting limits of the nuclides to be measured. The limit of detection was determined on a pure, aged natural uranium (ANU) solution. The value is dependent upon detector efficiency and background. 1.3 The nuclides to be measured are106Ru/ 106Rh, 103Ru,137Cs, 144Ce, 144Pr, 141Ce, 95Zr, 95Nb, and 125Sb. Other gamma energy-emitting fission nuclides present in the spectrum at detectable levels should be identified and quantified as required by the data quality objectives. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its us...

American Society for Testing and Materials. Philadelphia

2005-01-01T23:59:59.000Z

474

Laboratory performance testing of an extruded bitumen containing a surrogate, sodium nitrate-based, low-level aqueous waste  

SciTech Connect (OSTI)

Laboratory results of a comprehensive, regulatory performance test program, utilizing an extruded bitumen and a surrogate, sodium nitrate-based waste, have been compiled at the Oak Ridge National Laboratory (ORNL). Using a 53 millimeter, Werner and Pfleiderer extruder, operated by personnel of WasteChem Corporation of Paramus, New Jersey, laboratory-scale, molded samples of type three, air blown bitumen were prepared for laboratory performance testing. A surrogate, low-level, mixed liquid waste, formulated to represent an actual on-site waste at ORNL, containing about 30 wt % sodium nitrate, in addition to eight heavy metals, cold cesium and strontium was utilized. Samples tested contained three levels of waste loading: that is, forty, fifty and sixty wt % salt. Performance test results include the ninety day ANS 16.1 leach test, with leach indices reported for all cations and anions, in addition to the EP Toxicity test, at all levels of waste loading. Additionally, test results presented also include the unconfined compressive strength and surface morphology utilizing scanning electron microscopy. Data presented include correlations between waste form loading and test results, in addition to their relationship to regulatory performance requirements.

Mattus, A.J.; Kaczmarsky, M.M.

1986-12-15T23:59:59.000Z

475

Soil-landscape model helps predict potassium supply in vineyards  

E-Print Network [OSTI]

for making and inter- preting soil surveys (2nd ed. ). USDA-K S, V, K Depth inches Color* moist soil Sand Silt Clay Claymineralogy† pH CEC cmol(+)/kg soil‡ Exchangeable K K

O'Geen, Anthony T; Pettygrove, Stuart; Southard, Randal; Minoshima, Hideomi; Verdegaal, Paul S.

2008-01-01T23:59:59.000Z

476

Storage and turnover of organic matter in soil  

E-Print Network [OSTI]

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:

Torn, M.S.

2009-01-01T23:59:59.000Z

477

Soils Management, Site Productivity and Forest Nutrition: Nutrient Balance  

E-Print Network [OSTI]

;#12;1) principals 2) strategies 3) implementation Sustainable Soil Management: #12;- maintenance of fertility soil management Strategies: #12;Examples of adaptive management models used for achieving sustainableSoils Management, Site Productivity and Forest Nutrition: Nutrient Balance and Availability

478

Soil Hydraulic Characteristics of a Small Southwest Oregon Watershed Following  

E-Print Network [OSTI]

--------------------------------------------- Soil Hydraulic Characteristics of a Small Southwest by a high-intensity burn over areas of steep topography. The areal distribution of soil hydraulic of infiltration capacity, saturated hydraulic conductivity, and soil moisture characteristics. Also, measures

Standiford, Richard B.

479

Experiment Hazard Class 15.2 - USDA Soil Permit  

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

shipment, and disposal of regulated soil samples. A copy of the current APS USDA Soil Permit must accompany all samples. A copy of the home institution's soil permit is required...

480

Acid soil fertility at the Cinzana station, Mali, West Africa  

E-Print Network [OSTI]

that may be associated with acid soil infertility include biological organisms (nematodes, termites), restrictive subsoil layers (claypans, ironpans, silt pans, plow pans, etc. ), soil erosion, zones of low soil moisture retention, and other physical...

Doumbia, Mamadou Diosse

1990-01-01T23:59:59.000Z

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


481

Manoj Shukla Assistant Professor of Environmental Soil Physics,  

E-Print Network [OSTI]

Manoj Shukla Assistant Professor of Environmental Soil Physics, Plant and Environmental Sciences University, India Professional Experience 2005-Present Assistant Professor of Environmental Soil Physics, New Interests Assessment and modeling of chemical fate and transport and physical, chemical properties of soil

Johnson, Eric E.

482

Competitive sorption of cadmium and lead in acid soils of central Spain  

SciTech Connect (OSTI)

The bioavailability and ultimate fate of heavy metals in the environment are controlled by chemical sorption. To assess competitive sorption of Pb and Cd, batch equilibrium experiments (generating sorption isotherms) and kinetics sorption studies were performed using single and binary metal solutions in surface samples of four soils from central Spain. For comparisons between soils, as well as, single and binary metal solutions, soil chemical processes were characterized using the Langmuir equation, ionic strength, and an empirical power function for kinetic sorption. In addition, soil pH and clay mineralogy were used to explain observed sorption processes. Sorption isotherms were well described by the Langmuir equation and the sorption kinetics were well described by an empirical power function within the reaction times in this study. Soils with higher pH and clay content (characterized by having smectite) had the greatest sorption capacity as estimated by the maximum sorption parameter (Q) of the Langmuir equation. All soils exhibited greater sorption capacity for Pb than Cd and the presence of both metals reduced the tendency for either to be sorbed although Cd sorption was affected to a greater extent than that of Pb. The Langmuir binding strength parameter (k) was always greater for Pb than for Cd. However, these k values tended to increase as a result of the simultaneous presence of both metals, that may indicate competition for sorption sites promoting the retention of both metals on more specific sorption sites. The kinetic experiments showed that Pb sorption is initially faster than Cd sorption from both single and binary solutions although the simultaneous presence of both metals affected the sorption of Cd at short times while only a minor effect was observed on Pb. The estimated exponents of the kinetic function were in all cases smaller for Pb than for Cd, likely due to diffusion processes into micropores or interlayer space of the clay minerals which occurs more readily for Cd than Pb. Finally, the overall sorption processes of Pb and Cd in the smectitic soil with the highest sorption capacity of the studied soils are slower than in the rest of the soils with a clay mineralogy dominated by kaolinite and illite, exhibiting these soils similar sorption rates. These results demonstrate a significant interaction between Pb and Cd sorption when both metals are present that depends on important soil properties such as the clay mineralogy.

Serrano, S.; Garrido, F.; Campbell, C.G.; Garcia-Gonzolez, Maria Teresa

2004-01-30T23:59:59.000Z

483

Spatial Variation of Soil Type and Soil Moisture in the Regional Atmospheric Modeling System  

SciTech Connect (OSTI)

Soil characteristics (texture and moisture) are typically assumed to be initially constant when performing simulations with the Regional Atmospheric Modeling System (RAMS). Soil texture is spatially homogeneous and time-independent, while soil moisture is often spatially homogeneous initially, but time-dependent. This report discusses the conversion of a global data set of Food and Agriculture Organization (FAO) soil types to RAMS soil texture and the subsequent modifications required in RAMS to ingest this information. Spatial variations in initial soil moisture obtained from the National Center for Environmental Predictions (NCEP) large-scale models are also introduced. Comparisons involving simulations over the southeastern United States for two different time periods, one during warmer, more humid summer conditions, and one during cooler, dryer winter conditions, reveals differences in surface conditions related to increases or decreases in near-surface atmospheric moisture con tent as a result of different soil properties. Three separate simulation types were considered. The base case assumed spatially homogeneous soil texture and initial soil moisture. The second case assumed variable soil texture and constant initial soil moisture, while the third case allowed for both variable soil texture and initial soil moisture. The simulation domain was further divided into four geographically distinct regions. It is concluded there is a more dramatic impact on thermodynamic variables (surface temperature and dewpoint) than on surface winds, and a more pronounced variability in results during the summer period. While no obvious trends in surface winds or dewpoint temperature were found relative to observations covering all regions and times, improvement in surface temperatures in most regions and time periods was generally seen with the incorporation of variable soil texture and initial soil moisture.

Buckley, R.

2001-06-27T23:59:59.000Z

484

Field test and mathematical modeling of bioremediation of an oil-contaminated soil. Part 2: Mathematical modeling  

SciTech Connect (OSTI)

A mathematical model was developed to describe the oxygen transfer from the air, the oil transfer from the soil, and the bio-reaction in the aqueous phase. Important parameters used in this model were obtained independently either in the laboratory or from the literature. The oil transfer rate constant, K[sub 1]a, was found to be a function of time during the remediation. The oil transfer rate controlling in this bioremediation process is confirmed again by the parameters obtained from simulation results for each plot. An example of calculation was used to illustrate the oil transfer controlling step in the bioremediation of oil contaminated soil.

Li, K.Y.; Xu, T.; Colapret, J.A. (Lamar Univ., Beaumont, TX (United States)); Cawley, W.A. (Gulf Coast Hazardous Substance Research Center, Beaumont, TX (United States)); Bonner, J.S. (Texas A and M Univ., College Station, TX (United States). Civil Engineering Dept.); Ernest, A.; Verramachaneni, P.B. (Texas A and I Univ., Kingsville, TX (United States). Environmental Engineering Dept.)

1994-01-01T23:59:59.000Z

485

Soil and plant responses from land application of saline-sodic waters: Implications of management  

SciTech Connect (OSTI)

Land application of co-produced waters from coalbed natural gas (CBNG) wells is one management option used in the Powder River Basin (PRB) of Wyoming and Montana. Unfortunately the co-produced CBNG waters may be saline and/or sodic. The objective of this study was to examine the effects of irrigation with CBNG waters on soils and plants in the PRB. Soil properties and vegetation responses resulting from 1 to 4 yr of saline sodic water (electrical conductivity (EC) 1.6-4.8 dS m{sup -1} sodium adsorption ratio (SAR), 17-57 mmol L- applications were studied during 2003 and 2004 field seasons on sites (Ustic Torriorthent Haplocambid, Haplargid and Paleargid) representing native range grasslands seeded grass hayfields and alfalfa hayfields. Parameters measured from each irrigated site were compared directly with representative non-irrigated sites. Soil chemical and physical parameters including pH, EC, SAR, exchangeable sodium percent, texture, bulk density, infiltration and Darcy flux rates, were measured at various depth intervals to 120 cm. Mulitple-year applications of saline sodic water produced consistent trends of increased soil EC AND SAR values to depths of 30 cm reduced surface infiltration rates and lowered Darcy flux rates to 120 cm. Significant differences (p {le} 0.05) were determined between irrigated and non-irrigated areas for EC, SAR infiltration rates and Darcy flux (p {le} 0.10) at most sites. Saline sodic CBNG water applications significantly increased native perennial grass biomass production and cover on irrigated as compared with non-irrigated sites; however overall species evenness decreased. Biological effects were variable and complex reflecting site-specific conditions and water and soil management strategies.

Vance, G.F.; King, L.A.; Ganjegunte, G.K. [University of Wyoming, Laramie, WY (United States). Department for Renewable Resources

2008-09-15T23:59:59.000Z

486

Sustainable Building Rating Systems Summary  

SciTech Connect (OSTI)

The purpose of this document is to offer information that could be used to compare and contrast sustainable building rating systems.

Fowler, Kimberly M.; Rauch, Emily M.

2006-07-01T23:59:59.000Z

487

Using soil sensing technology to examine interactions and controls between ectomycorrhizal growth and environmental factors on soil CO2 dynamics  

E-Print Network [OSTI]

Plant Soil (2010) 331:17–29 DOI 10.1007/s11104-y REGULAR ARTICLE Using soil sensing technology to examineand environmental factors on soil CO 2 dynamics Niles J.

Hasselquist, Niles J.; Vargas, Rodrigo; Allen, Michael F.

2010-01-01T23:59:59.000Z

488

Relating the Expression of Soil Redoximorphic Features to Soil Texture, pH, and Cation Exchange Capacity  

E-Print Network [OSTI]

Three laboratory studies were performed to elucidate the influence of soil texture, pH, and cation exchange capacity (CEC) on the concentration of ferrous Fe in soil solution and the resulting expression of soil redoximorphic features...

Mersmann, Ryan S.

2010-01-14T23:59:59.000Z

489

19th World Congress of Soil Science, Soil solutions for a changing world, Brisbane, Australia 1-6 August 2010  

E-Print Network [OSTI]

). The investigated ES were climate regulation through carbon sequestration in soil and biomass, soil conservation of these results are discussed. Key Words Land use change, socioeconomic drivers, carbon sequestration, soil

Boyer, Edmond

490

Process for removing polychlorinated biphenyls from soil  

DOE Patents [OSTI]

The present invention relates to a method of removing polychlorinated biphenyls from soil. The polychlorinated biphenyls are extracted from the soil by employing a liquid organic solvent dispersed in water in the ratio of about 1:3 to 3:1. The organic solvent includes such materials as short-chain hydrocarbons including kerosene or gasoline which are immiscible with water and are nonpolar. The organic solvent has a greater affinity for the PCB's than the soil so as to extract the PCB's from the soil upon contact. The organic solvent phase is separated from the suspended soil and water phase and distilled for permitting the recycle of the organic solvent phase and the concentration of the PCB's in the remaining organic phase. The present process can be satisfactorily practiced with soil containing 10 to 20% petroleum-based oils and organic fluids such as used in transformers and cutting fluids, coolants and the like which contain PCB's. The subject method provides for the removal of a sufficient concentration of PCB's from the soil to provide the soil with a level of PCB's within the guidelines of the Environmental Protection Agency.

Hancher, C.W.; Saunders, M.B.; Googin, J.M.

1984-11-16T23:59:59.000Z

491

CSMRI Bagged Soil Disposal Summary Report  

E-Print Network [OSTI]

of radioactive/metals-contaminated soils and similar soils to a solid waste landfill in a letter dated August 26 Radioactive Materials License No. 1094-01. This document serves to provide a summary of the disposal as well. During the 2004 remediation work, approximately 1,870 cubic yards (cy) of radioactive

492

Forests and soil UK Forestry Standard Guidelines  

E-Print Network [OSTI]

; forestry; soil; sustainable forest management; UK Forestry Standard. FCGL006/FC-GB(MMJ)/JCTP-2.5K/NOV11 for sustainable forest management Good forestry practice requirement Element of SFM Reference number LegalForests and soil UK Forestry Standard Guidelines #12;Key to symbols UKFS Requirements

493

Carbon and Nitrogen Dynamics in Agricultural Soils  

E-Print Network [OSTI]

support in a precision farming context. Keywords: Carbon balances, carbon sequestration, decompositionCarbon and Nitrogen Dynamics in Agricultural Soils Model Applications at Different Scales in Time Print: SLU Service/Repro, Uppsala 2012 #12;Carbon and Nitrogen Dynamics in Agricultural Soils. Model

494

Analysis of large soil samples for actinides  

SciTech Connect (OSTI)

A method of analyzing relatively large soil samples for actinides by employing a separation process that includes cerium fluoride precipitation for removing the soil matrix and precipitates plutonium, americium, and curium with cerium and hydrofluoric acid followed by separating these actinides using chromatography cartridges.

Maxwell, III; Sherrod L. (Aiken, SC)

2009-03-24T23:59:59.000Z

495

NNSS Soils Monitoring: Plutonium Valley (CAU366)  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) National Nuclear Security Administration (NNSA), Nevada Site Office (NSO), Environmental Restoration Soils Activity has authorized the Desert Research Institute (DRI) to conduct field assessments of potential sediment transport of contaminated soil from Corrective Action Unit (CAU) 366, Area 11 Plutonium Valley Dispersion Sites Contamination Area (CA) during precipitation runoff events.

Miller Julianne J.,Mizell Steve A.,Nikolich George, Campbell Scott

2012-02-01T23:59:59.000Z

496

DIGITAL SOIL RESOURCE INVENTORIES: STATUS AND PROSPECTS  

E-Print Network [OSTI]

DIGITAL SOIL RESOURCE INVENTORIES: STATUS AND PROSPECTS D G Rossiter Department of Earth Systems an inventory of digital soils data and supporting information available or publicized on the World Wide Web-scale inventories, especially using the SOTER methodology. Large-scale digital data are limited to the USA, Canada

Rossiter, D G "David"

497

CCA Training : Soil and Water Management  

E-Print Network [OSTI]

dry 25,000,000 acresa Includes both external surfaces and surfaces between crystal plates. #12;The and nutrient transformations · Associated with soil porosity #12;Soil Physical Properties: Structure Properties: Structure · Structure type = aggregation has different shape and varies with depth ­Granular

Balser, Teri C.

498

Soil and Groundwater Cleanup - In-Situ Grouting, Lessons Learned...  

Energy Savers [EERE]

Soil and Groundwater Cleanup - In-Situ Grouting, Lessons Learned (Post CD-4), Environmental Management Cleanup, May 2011 Soil and Groundwater Cleanup - In-Situ Grouting, Lessons...

499

Rocky Flats Environmental Technology Site Archived Soil & Groundwater...  

Office of Environmental Management (EM)

Rocky Flats Environmental Technology Site Archived Soil & Groundwater Master Reports Rocky Flats Environmental Technology Site Archived Soil & Groundwater Master Reports Rocky...

500

Microbial communities acclimate to recurring changes in soil...  

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

communities acclimate to recurring changes in soil redox potential status. Microbial communities acclimate to recurring changes in soil redox potential status. Abstract: Rapidly...