Results 31 to 40 of about 4,448 (271)

Geochemical and S isotopic studies of pollutant evolution in groundwater after acid in situ leaching in a uranium mine area in Xinjiang

Nuclear Engineering and Technology, 2023
Laboratory experiments and point monitoring of reservoir sediments have proven that stable sulfate reduction (SSR) can lower the concentrations of toxic metals and sulfate in acidic groundwater for a long time.
Zhenzhong Liu, Kaixuan Tan, Chunguang Li, Yongmei Li, Chong Zhang, Jing Song, Longcheng Liu   +6 more
doaj   +1 more source

Fraction of Sulfur Isotopes during Reduction [PDF]

Bulletin of the Chemical Society of Japan, 1958
Barium sufaa labelled with sulfur-35 was reduced, and hydrogen sulfide evolved from the reactions was entrained with carben dioxide. The gas was led into two absorbing cells in series, the first of which contrined a known amount of aqueous zinc acetaa, for radioactivity measurement, and the second contained cadmium carbonate for sufide deaction.
Iwaji Iwasaki, Hikaru Shimojima, Hiroshi Fukutomi   +2 more
openaire   +1 more source

Sulfur and oxygen isotope fractionation during bacterial sulfur disproportionation under anaerobic haloalkaline conditions

, 2016
Sulfur and oxygen isotope fractionation of elemental sulfur disproportionation at anaerobic haloalkaline conditions was evaluated for the first time. Isotope enrichment factors of the strains Desulfurivibrio alkaliphilus and Dethiobacter alkaliphilus ...
Alexander Poser, Carsten Vogt, Kay Knöller, Dimitry Y. Sorokin, Kai Finster, Hans H. Richnow   +5 more
openalex   +2 more sources

Microbially mediated kinetic sulfur isotope fractionation: reactive transport modeling benchmark [PDF]

, 2020
Microbiallymediated sulfate reduction is a ubiquitous process inmany subsurface systems. Isotopic fractionation is characteristic of this anaerobic process, since sulfate-reducing bacteria (SRB) favor the reduction of the lighter sulfate isotopologue ...
Wanner, Christoph, Şengör, Sema Sevinç, Arora, Bhavna, Druhan, Jennifer L. (author), Steefel, Carl I., Yiwei, Cheng, van Breukelen, B.M. (author), Steefel, Carl I. (author), Sengör, Sevinc S., Wanner, Christoph (author), van Breukelen, B.M., Arora, Bhavna (author), Şengör, S. Sevinç, Şengör, S. Sevinç (author), Cheng, Yiwei, Cheng, Yiwei (author), Steefel, Carl, Druhan, Jennifer L., van Breukelen, Boris M.   +18 more
core   +1 more source

Tetrathionate and Elemental Sulfur Shape the Isotope Composition of Sulfate in Acid Mine Drainage

Frontiers in Microbiology, 2017
Sulfur compounds in intermediate valence states, for example elemental sulfur, thiosulfate, and tetrathionate, are important players in the biogeochemical sulfur cycle.
Nurgul Balci, Benjamin Brunner, Benjamin Brunner, Alexandra V. Turchyn   +3 more
doaj   +1 more source

Sulfur isotope fractionation during incorporation of sulfur nucleophiles into organic compounds [PDF]

Chemical Communications, 2008
(34)S enrichment is shown to occur during sulfurization reactions and for the first time conclusively attributed to an isotope equilibrium effect rather than selective addition of (34)S enriched nucleophiles.
Amrani, Alon, Ma, Qisheng, Ahmad, Ward Said, Aizenshtat, Zeev, Tang, Yongchung   +4 more
openaire   +3 more sources

Copper isotope evidence for large-scale sulphide fractionation during Earth’s differentiation [PDF]

, 2015
The differentiation of Earth into a metallic core and silicate mantle left its signature on the chemical and isotopic composition of the bulk silicate Earth (BSE).
Savage, P.S., Siebert, J., Badro, J., Moynier, F., Puchtel, I.S., Chen, H., Savage, Paul S., Shofner, G.   +7 more
core   +1 more source

Fractionation of sulfur isotopes by Desulfovibrio vulgaris mutants lacking hydrogenases or type I tetraheme cytochrome c3

Frontiers in Microbiology, 2013
The sulfur isotope effect produced by sulfate reducing microbes is commonly used to trace biogeochemical cycles of sulfur and carbon in aquatic and sedimentary environments.
Min Sub eSim, Min Sub eSim, David T Wang, Grant M Zane, Judy D Wall, Tanja eBosak, Shuhei eOno   +6 more
doaj   +1 more source

Paleoarchean sulfur cycling: Multiple sulfur isotope constraints from the Barberton Greenstone Belt, South Africa [PDF]

, 2015
Mass-dependent and mass-independent sulfur isotope fractionation archived in volcanic and sedimentary rocks from the Barberton Greenstone Belt (3550-3215. Ma), South Africa, provide constraints for sulfur cycling on the early Earth. Four different sample
Farquhar, J., Beukes, N. J., Beukes, Nicolas J., Strauss, H., Montinaro, Alice, Strauss, Harald, Schwarz-Schampera, Ulrich, Münker, Carsten, Arndt, N. T., Montinaro A., NWO-NSO: Testing the robustness of the sulfur stable isotope biomarker and paleoredox indicator for planetary exploration, Mason, Paul R D, Petrology, Mason, P. R. D., Roerdink, Desiree, Peters, Marc, Gutzmer, J., Gutzmer, Jens, Farquhar, James, Schwarz-Schampera, U., Roerdink, D., Peters, M., Arndt, Nicholas T., Munker, C.   +23 more
core   +1 more source

Sulfur Stable Isotope Discrimination in Rice: A Sulfur Isotope Mass Balance Study

Frontiers in Plant Science, 2022
The use of sulfur (S) stable isotopes to study S metabolism in plants is still limited by the relatively small number of studies. It is generally accepted that less S stable isotope discrimination occurs during sulfate (SO42–) uptake.
Viviana Cavallaro, Moez Maghrebi, Moez Maghrebi, Mariachiara Caschetto, Mariachiara Caschetto, Gian Attilio Sacchi, Fabio Francesco Nocito   +6 more
doaj   +1 more source