Arsenic speciation in iron hydroxide precipitates.
作者： Birgit Daus , Holger Weiß , Rainer Wennrich
DOI: 10.1016/S0039-9140(97)00333-0
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摘要: In this study a special sequential extraction method is proposed to discriminate between arsenic adsorbed and co-precipitated in precipitates arising mainly from iron hydroxides or bound low solubility mineral phases. Synthetic hydroxide were prepared investigate the influence of amount arsenate, manganese additionally added valence state on remobilisation arsenic. After preparing with arsenate no could be detected supernatant solution. About 82% (w/w) precipitate remaining part can dissolved by shaking an oxalate buffer. A significant difference analysed two steps was not found. Consequently, compounds solubility, such as scorodite, formed synthesized precipitates. The addition significantly uptake hydroxides. Natural samples percolate water tin mill tailings investigated using method.
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