Results 271 to 280 of about 5,447,673 (316)

Reduction of Recycled Barium Sulfate

Russian Journal of Applied Chemistry, 2002
Barium sulfate, which is recycled according to a new flowsheet of sodium sulfide production, was reduced by various carbon-containing materials (oil and furnace coke and Zh-grade coal). The reduction process was studied in comparison with the reduction of natural barite concentrate.
L. A. Malysh, L. G. Gaisin, M. F. Volkova, A. G. Prokhorov, K. V. Tkachev   +4 more
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Thermochemical sulfate reduction a review

Journal of Thermal Analysis, 1994
The high concentrations of hydrogen sulfide found in many oil and gas fields is thought to arise from the oxidation of petroleum hydrocarbons by sulfate—a reaction that reduces the value of the resource. This review, undertaken in order to better understand the geochemistry of TSR reaction in oil field sediments, covers the relevant information on ...
T. P. Goldstein, Z. Aizenshtat
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Thermochemical Sulfate Reduction

1997
Abstract This paper will explore the significance of thermochemical sulfate reduction (TSR) to the origin of sediment-hosted disseminated gold (SHDG) deposits. TSR provides a means of generating abnormally high concentrations of H2S at moderate temperatures (e.g., 100 to 200°C).
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Sulfate reduction in deep-sea sediments

American Journal of Science, 1991
Sulfate reduction rates calculated from about 200 DSDP pore water sulfate profiles have been contoured and plotted on a map covering most areas of the world ocean. Rates show a remarkable spatial consistency, with high rates observed near the continental margins, becoming progressively lower toward the central ocean basins.
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Respiratory Sulfate Reduction

1995
In the microbial world the dissimilatory sulfate-reducing bacteria (SRB) are unique in that they have the ability to utilize inorganic sulfate as a terminal electron acceptor. This respiratory process, occurring under anaerobic conditions, is conducted by SRB for the purpose of generating high energy compounds for biosynthetic reactions involved in ...
openaire   +1 more source

Reduction of sulfates by hydrogen

Canadian Journal of Chemistry, 1976
The initial stage of reduction of anhydrous sulfates by H2 may lead to the formation of any of the following: (1) sulfates at lower valency, e.g., reduction of CuSO4, HgSO4, Fe2(SO4)3; (2) metals, e.g., Cu2SO4, Ag2SO4; (3) sulfides, e.g., NiSO4, CoSO4, CdSO4, CaSO4, SrSO4, BaSO4, and alkaline metal sulfates; (4) oxides, e.g., Al2(SO4)3, MgSO4, BeSO4; (
Fathi Habashi, Shaheer A. Mikhail, Kim Vo Van   +2 more
openaire   +1 more source

Application of microbial sulfate-reduction process for sulfate-laden wastewater treatment: A review

Journal of Water Process Engineering, 2023
C. Diao, Weizhuo Ye, Jia Yan, T. Hao, Lei Huang, Yong-heng Chen, J. Long, T. Xiao, Hongguo Zhang   +8 more
semanticscholar   +1 more source

Thermochemical sulfate reduction in sedimentary basins and beyond: A review

Chemical Geology, 2022
C. Cai, Hongxia Li, Kaikai Li, Daowei Wang   +3 more
semanticscholar   +1 more source

Sulfate concentrations affect sulfate reduction pathways and methane consumption in coastal wetlands.

Water Research, 2022
Wei La, Xiaokun Han, Cong-Qiang Liu, H. Ding, Mingxuan Liu, Fusheng Sun, Siliang Li, Yunchao Lang   +7 more
semanticscholar   +1 more source

Simulation of sulfate-dependent sulfate reduction using Monod kinetics

Mathematical Geology, 1987
A simple computer code is presented for simulating the dependence of sulfate reduction on sulfate concentration using Monod kinetics. Unlike previous models, the code provides a numerical initial value problem solution, rather than a two-point boundary value solution, for the Monod model using a search procedure to find the correct starting value for ...
Leonard Robert Gardner, Ian Lerche
openaire   +1 more source