Geochemistry of arsenic in low sulfide-high carbonate coal waste rock, Elk Valley, British Columbia, Canada
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- 作者：Ashis Biswas ; ashis.biswas@uni-bayreuth.de ; ashischemistry@gmail.com ; M. Jim Hendry ; Joseph Essilfie-Dughan
- 关键词：EMPA ; XANES ; Pyrite oxidation ; Secondary Fe-oxides ; Precipitation ; Adsorption
- 刊名：Science of The Total Environment
- 出版年：2017
- 出版时间：1 February 2017
- 年：2017
- 卷：579
- 期：Complete
- 页码：396-408
- 全文大小：2507 K
- 卷排序：579
文摘
Geochemistry of As in low sulfide-high carbonate coal waste rock is discussed. The major As-containing mineral phases are primary pyrite and secondary Fe oxides. Carbonate dissolution facilitates Fe oxide precipitation during pyrite oxidation. Sorption to Fe oxides is a geochemical control on As release during pyrite oxidation. Fe oxides are a long-term sink for As in waste rock dumps under oxic conditions.