The nonvegetated cell showed the least Se removal both in concentration and in mass and 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, seepage, and volatilization. A field study on the removal of Se from agricultural subsurface drainage was conducted from …

Selenium isotope mass balance model3.1. Marine Se cycle: reservoirs and fluxes. The modern, pre-anthropogenic marine biogeochemical Se cycle summarized in Fig. 3, Table 1 and Table 2 is based largely on the work of Suzuki et al. (1979), Nriagu (1989a) and Cutter and Bruland (1984). The biogeochemical Se reservoirs considered in the …

To evaluate the sensitivity of bulk shale Se isotopic signatures to changes in paleoceanographic conditions and processes, we present a quantitative isotope mass …

Selenium removal and mass balance in a constructed flow-through wetland system. Journal of Environmental Quality, 32: 1557-1570. 23. Gao, S., K.K. Tanji, D.W. Peters, Z.-Q. Lin, and N. Terry. 2003. Selenium removal from irrigation drainage water flowing through constructed wetland cells with special attention to accumulation in sediments.

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 ...

The goal of this paper is to compare recently measured Se inflows to, and Se outputs from, the Great Salt Lake, and to compare the resulting mass balance to …

total mass (m). When the sink is described in this first order form we can rewrite the mass balance as: d[M] / dt = Q - k [M] At steady state, when d[M] / dt = 0, [M] / Q = mass present/input = 1/k = This equation predicts an inverse relationship between elemental reactivity (k) and residence time as k goes up, goes down.

Study with Quizlet and memorize flashcards containing terms like Selenic acid (H2SeO4) forms when solid selenium dioxide reacts with gaseous oxygen and liquid water to form aqueous selenic acid. Problem Q: Enter a balanced chemical equation for this reaction., In a popular classroom demonstration, solid sodium is added to liquid water and reacts to …

Tut 1-Mass Balance 2016 - Free download as PDF File (.pdf), Text File (.txt) or read online for free. ... Problem 1.9 Plateau Creeks carries 5.0 m3/s of water with a selenium (Se) concentration of 0.0015 mg/L. A farmer starts withdrawing 1.0 m3/s of the creek water to irrigate the land.

Semantic Scholar extracted view of "Selenium mass balance in the Great Salt Lake, Utah." by X. Díaz et al.

Salt Flushing, Salt Storage, and Controls on Selenium and Uranium: A 31‐Year Mass‐Balance Analysis of an Irrigated, Semiarid Valley. JAWRA Journal of the American Water Resources Association 2020, 56 (4), 647-668.

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 …

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 ...

The control volume boundary for the selenium mass balance was established within the open waters of the south arm (Gilbert Bay) (Fig. 1). The north boundary of the control volume is the railroad causeway separating the north and south arms (Gunnison and Gilbert Bays). The east boundary is formed by the lakeshore, …

Abstract. 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 …

Selenium decreases the production of thyroid hormones. Selenium limits the formation of free radicals and prevents oxidative damage. ... People achieve their peak bone mass after the first four decades of their life. ... and relaxation of muscles. transport proteins through the blood. control blood glucose levels. maintain the acid-base balance ...

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 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 …

Surface and ground waters of the Central Valley of California (e.g., rivers, dams, off-stream storage reservoirs, pumping facilities, irrigation and drinking water supply canals, agricultural drainage canals) are part of a hydrologic system that makes up a complex ecosystem extending from the riparian wetlands of the Sacramento and San Joaquin Rivers through …

@article{Jones2020SeleniumMB, title={Selenium mass balance and flux in water of Pariette Wetlands, Utah (USA)}, author={Colleen P. Jones and Michael C. Amacher 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 JAWRA 14 JOURNAL OF THE AMERICAN …

Selenium removal and mass balance in a constructed flow-through wetland system. - Scientific article published on July 2003.

Selenium's atomic mass is 78.963 and shows six stable and twenty-four radioactive isotopes. ... Isotopes that have an unstable nucleus and therefore emit particles and energy to reach a more stable balance between protons and neutrons. Selenoaminoacids. Amino acids such as selenocysteine and selenomethionine that …

with low Secontent wasutilizedto verify the procedure and reproducibility. The isotopic mass-balance calcula-tion gives consistent δ82Se values for the sum of the extracted pools, relative to δ82Se of the bulk soils. For in-stance, in one studied soil (soil-1), the sum of δ82Se of all individual Se-pools (δ82Se mass-balance = 3.35‰)isin

Mass-dependent variations in selenium stable isotope ratios have recently been developed as a paleo-redox proxy. Since the reduction of selenium oxyanions occurs at a relatively high redox potential, this system holds promise for probing conditions relevant to the evolution and diversification of eukaryotic and animal life, which required ...

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.

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%).

Tellurium Bioprocessed by a Selenium-Resistant Bacterium Grown in the Presence of Selenite or Tellurite, Master of Science (Chemistry), December, 2001. Sam Houston State University, Hunts-ville, Texas, 68 pp. Purpose The purpose of this investigation was to determine: (1) the mass balance of selenium or

Salinity, selenium, and uranium pose water‐quality challenges for the Arkansas River in southeastern Colorado and other rivers that support irrigation in semiarid regions. This study used 31 years of continuous discharge and specific conductance (SC) monitoring data to assess interannual patterns in water quality using mass balance on a …

Selenium Removal and Mass Balance in a Constructed Flow-Through Wetland System. S. Gao, Corresponding Author. S. Gao ... (target 14 d). Average weekly Se concentration ratios of outflow to inflow ranged from 0.45 to 0.79 and mass ratio (concentration × water volume) from 0.24 to 0.52 for year 2000, that is, 21 to 55% …