Strictly, a mineral that is a sulfide. Minerals are natural compounds formed through geological processes. ... In chemistry, a sulfide (sulphide in British and Canadian English) is a chemical compound or combination of sulfur with an oxidation number of -2, with another chemical element or a radical thereof. ...
Closely related are selenide and telluride minerals.
Anthropogenic sources of arsenic contamination include sulfide ore smelting and disposal, and use in agricultural chemicals, wood preservation, and the burning of fossil fuels enriched in arsenic.
The increase in porewater Fe(II) is accompanied by arsenic release.
Arsenic may be sequestered in the sediments as an arsenic sulfide solid; however, sorption on sulfideminerals may also occur.
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