mass balance selenium

mass balance selenium

Selenium removal and mass balance in a constructed flow ...

The global mass balance showed that on the average about 59% of the total inflow Se was retained within the cells and Se outputs were outflow (35%), seepage (4%), and volatilization (2%).

Mass balance approach to selenium cycling through the San ...

Mass balance approach to selenium cycling through the San Joaquin Valley, sources to river to bay: Year Published: 1997: Language: English: Publisher: Taylor Francis: Publisher location: New York: Contributing office(s) Geology, Minerals, Energy, and Geophysics Science Center, National Research Program - Western Branch, Toxic Substances Hydrology Program: Description

Selenium mass balance in the Great Salt Lake, Utah

A mass balance for Se in the south arm of the Great Salt Lake was developed for September 2006 to August 2007 of monitoring for Se loads and removal flows. The combined removal flows (sedimentation and volatilization) totaled to a geometric mean value of 2079??kg Se/yr, with the estimated low value being 1255??kg Se/yr, and an estimated high value of 3143??kg Se/yr at the 68% confidence level.

Selenium mass balance in the Great Salt Lake, Utah ...

Mar 15, 2009  A mass balance for selenium was developed for the period May 2006 to July 2007, during which data regarding inputs and outputs to the lake were collected .

Selenium mass balance and flux in water of Pariette ...

Feb 01, 2020  Se mass balance. A mass-balance for Se was created using the mass inflow, mass outflow, and the retained components. Discharge at the inflow and outflow were used to calculate the influx, outflux, and stored or lost Se for a year. The amount of Se retained or lost in the wetlands on average was 1150 kg year −1. About 25% of the selenium entering the wetlands exited the wetlands

Selenium mass balance in the Great Salt Lake, Utah ...

A mass balance for Se in the south arm of the Great Salt Lake was developed for September 2006 to August 2007 of monitoring for Se loads and removal flows. The combined removal flows (sedimentation and volatilization) totaled to a geometric mean value of 2079 kg Se/yr, with the estimated low value being 1255 kg Se/yr, and an estimated high value of 3143 kg Se/yr at the 68% confidence level.

A sequential extraction technique for mass-balanced stable ...

The isotopic mass-balance calculation gives consistent δ 82 Se values for the sum of the extracted pools, relative to δ 82 Se of the bulk soils. For instance, in one studied soil (soil-1), the sum of δ 82 Se of all individual Se-pools (δ 82 Se mass-balance =3.35‰) is in good agreement with the analysis of δ 82 Se of the bulk soil (δ 82 Se bulk of 3.56‰).

Selenium mass balance and flux in water of Pariette ...

Abstract. Selenium (Se) has potentially deleterious impacts on flora and fauna of aquatic ecosystems. As Se moves through a wetlands system, various processes such as sorption onto sediments, plant uptake, and volatilization into the atmosphere can attenuate Se resulting in its storage in the wetlands. A comparison of inlet and outlet Se fluxes can ...

(PDF) Flow, Salt and Selenium Mass Balances in the San ...

Selenium Mass Balance between Stations A and B A simple mass balance of selenium was calculated to better understand the d ynamics of selenium mass transport and

Flow, Salt and Selenium Mass Balances in the San Luis Drain

Selenium Mass Balance between Stations A and B A simple mass balance of selenium was calculated to better understand the dynamics of selenium mass transport and mass transfer within the San Luis Drain. Selenium is a non-conservative chemical constituent. The data are presented in Tables 3a, 3b, and 3c. Despite the

Selenium mass balance and flux in water of Pariette ...

Selenium mass balance and flux in water of Pariette Wetlands, Utah (USA) ... Selenium (Se) has potentially deleterious impacts on flora and fauna of aquatic ecosystems. ... Se resulting in its storage in the wetlands. A comparison of inlet and outlet Se fluxes can be used to determine the mass of Se stored in a wetlands system. Inlet and outlet ...

A sequential extraction technique for mass-balanced stable ...

The isotopic mass-balance calculation gives consistent δ 82 Se values for the sum of the extracted pools, relative to δ 82 Se of the bulk soils. For instance, in one studied soil (soil-1), the sum of δ 82 Se of all individual Se-pools (δ 82 Se mass-balance =3.35‰) is in good agreement with the analysis of δ 82 Se of the bulk soil (δ 82 ...

Selenium Removal and Mass Balance in a Constructed Flow ...

The objectives of this research were to evaluate Se removal efficiency of each wetland cell and to carry out a mass balance on Se. The inflow drainage water to the cells had average annual Se concentrations of 19 to 22 μg L −1 dominated by selenate [Se(VI), 95%].

(PDF) Flow, Salt and Selenium Mass Balances in the San ...

A simple mass balance of selenium was calculated to better understand the d ynamics of . selenium mass transport and mass transfer within the San Luis Drain. Selenium is a non-

Selenium mass balance in the Great Salt Lake, Utah ...

More detailed measurements of the whole lake system would enable a mass balance of selenium in the lake to be determined, encompassing all sources and sinks. [28] 3. ) Lake Macquarie Amouroux and ...

Selenium mass balance and flux in water of Pariette ...

Selenium mass balance and flux in water of Pariette Wetlands, Utah (USA)

Selenium mass balance in the Great Salt Lake, Utah - NASA/ADS

adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

A sequential extraction technique for mass-balanced stable ...

Aug 14, 2014  The isotopic mass-balance calculation gives consistent δ 82 Se values for the sum of the extracted pools, relative to δ 82 Se of the bulk soils. For instance, in one studied soil (soil-1), the sum of δ 82 Se of all individual Se-pools (δ 82 Se mass-balance = 3.35‰) is in good agreement with the analysis of δ 82 Se of the bulk soil (δ 82 ...

Characterization of Groundwater Quality and Discharge with ...

system. Using a mass-balance approach, estimated groundwater discharge rates to Sunflower Drain ranged from 0.15 to 0.27 cubic feet per second per mile with one losing reach identified. Selenium, sulfate, and nitrate concentrations in groundwater estimated by mass-balance calculations were

Selenium Removal and Mass Balance in a Constructed Flow ...

A field study on the removal of Se from agricultural subsurface drainage was conducted from May 1997 to February 2001 in the Tulare Lake Drainage District (TLDD) of San Joaquin Valley, California. A ...

Selenium - USGS

Graph illustrating a mass balance for selenium in the United States from ... Selenium concentrations in selected Earth and lunar materials ..... Q16 Q6. Estimated world selenium reserves in 2014, in metric tons.....Q21 Q7. National Institutes of Health recommended dietary reference intakes ...

Selenium Supplementation, Body Mass Composition, and ...

Elisabetta Cavedon, Jacopo Manso, Isabella Negro, Simona Censi, Roberto Serra, Luca Busetto, Roberto Vettor, Mario Plebani, Raffaele Pezzani, Davide Nacamulli, Caterina Mian, " Selenium Supplementation, Body Mass Composition, and Leptin Levels in Patients with Obesity on a Balanced Mildly Hypocaloric Diet: A Pilot Study ", International Journal of Endocrinology,. vol. 2020, Article ID

Agilent ICP-MS Journal - ResearchGate

Table 2. Recovery of selenium from soluble and insoluble fractions Sample Se (µg) *SeMet Se (µg) CIC, Se recovery from LC (µg) Mass balance Se recovery (%) Se Yeast 1 387.0 256.2 (66.2) 392.4 101.4

Selenium mass balance and flux in water of Pariette ...

Selenium mass balance and flux in water of Pariette Wetlands, Utah (USA)

Selenium Removal and Mass Balance in a Constructed Flow ...

A field study on the removal of Se from agricultural subsurface drainage was conducted from May 1997 to February 2001 in the Tulare Lake Drainage District (TLDD) of San Joaquin Valley, California. A ...

Selenium - USGS

Graph illustrating a mass balance for selenium in the United States from ... Selenium concentrations in selected Earth and lunar materials ..... Q16 Q6. Estimated world selenium reserves in 2014, in metric tons.....Q21 Q7. National Institutes of Health recommended dietary reference intakes ...

Characterization of Groundwater Quality and Discharge with ...

system. Using a mass-balance approach, estimated groundwater discharge rates to Sunflower Drain ranged from 0.15 to 0.27 cubic feet per second per mile with one losing reach identified. Selenium, sulfate, and nitrate concentrations in groundwater estimated by mass-balance calculations were

Agilent ICP-MS Journal - ResearchGate

Table 2. Recovery of selenium from soluble and insoluble fractions Sample Se (µg) *SeMet Se (µg) CIC, Se recovery from LC (µg) Mass balance Se recovery (%) Se Yeast 1 387.0 256.2 (66.2) 392.4 101.4

Characterization of groundwater quality and discharge with ...

Using a mass-balance approach, estimated groundwater discharge rates to Sunflower Drain ranged from 0.15 to 0.27 cubic feet per second per mile with one losing reach identified. Selenium, sulfate, and nitrate concentrations in groundwater estimated by mass-balance calculations were similar to concentrations measured in the Poly 17 observation ...

Salt Flushing, Salt Storage, and Controls on Selenium and ...

charge and specific conductance (SC) monitoring data to assess interannual patterns in water quality using mass balance on a 120-km reach of river. Discrete sampling data were used to link the SC records to salinity, selenium, and uranium. Several important patterns emerged. Consumptive use reduced discharge by a median value of 33%

Chapter 8. Treatment of drainage effluent

The DM/Dt is the mass flux of selenium accumulating in the control volume (cell) consisting of the sediments, organic detrital matter, fallen litter, standing water and standing crop. Figure 46. Initial estimate on mass balance of selenium in ten flow-through wetland cells, 1997-2000

The Mass Balance Approach - BASF

Sep 23, 2019  • A mass balance approach is needed to ensure a higher use of renewable and recycled feedstocks in the chemical industry • There is a strong wish of harmonizing voluntary standards • The brands and industry desired a stable multi-stakeholder standard with

Chemical Equation Balancer

To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above. Use uppercase for the first character in the element and lowercase for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored.

Salt Flushing, Salt Storage, and Controls on Selenium and ...

Selenium and Uranium Mass‐Balance Analysis. The mass‐balance framework applied to TDS was also applied to Se and U. Correlations with SC used to convert SC to Se or U concentrations (Figures S1 and S2; Table S2) are not as tight as those for TDS (Table 1). Correlations between SC and U are quite strong, with R 2 values ranging 0.81–0.96.

Determination of Methionine and Selenomethionine in ...

A total selenium concentration of 2064.6 ± 45.4 μg/g was obtained for this yeast material. The extraction efficiency and a mass balance budget were determined. Acid hydrolysis liberated 81.0% of the total selenium present. SeMet comprised 79.0% of the extracted selenium and 63.9% of the total selenium present in the yeast. *

Which Substances Make Up the RCRA 8 Metals?

Selenium . Selenium is a usually found in soil, but is also generated in its elemental state as the byproduct of refining metal sulfide and copper ores. Its uses in manufacturing can range from the production of electronics (as it is a semiconductor) to pharmaceuticals. Selenium is also necessary for human health, and can even be bought as a ...

CiteSeerX — 2MASS BALANCE AND TRAPPING OF HEADSPACE ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): One of the purposes of these experiments was to determine the mass balance in the bioremediation of selenium amended samples and to try to improve the efficiency of the bioremediation of selenium. The other purpose was to study the interference of glass containers in selenium determination by atomic absorption ...