Distribution and formation of thioarsenate in high arsenic groundwater from the Datong Basin, northern China
作者： Shutang Sun , Xianjun Xie , Junxia Li , Kun Qian , Zeyong Chi
DOI: 10.1016/J.JHYDROL.2020.125268
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摘要: Abstract Understanding the formation of thioarsenate, an important arsenic species, is great significance with respect to explaining mobilization in fresh groundwater systems. Monothioarsenate (MTA), dithioarsenate (DTA), and trithioarsenate (TriTA) are three main forms thioarsenate groundwater. A total 30 samples were collected from Datong basin conduct hydrochemistry speciation analysis. Geochemical simulations established verify occurrence thioarsenate. The results show was detected 40% at concentrations ranging 2.36 209.9 μg/L; highest concentration accounted for 68% arsenic. Thioarsenate mainly occurs discharge area basin, where characterized by strongly reducing conditions (Eh up −175.3 mV) higher (up 3450 μg/L) sulfide 8480 μg/L). strong positive correlation (r = 0.81, p
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