Arsenic-Microbe-Mineral Interactions in Mining-Affected Environments

Minerals

Karen A. Hudson-Edwards¹ 

[1] Department of Earth and Planetary Sciences, Birkbeck, University of London, Malet St., London WC1E 7HX, UK

关键词: arsenic;    prokaryotes;    mine;    mineral;    tailings;    contamination;    remediation;   

DOI  :  10.3390/min3040337

来源: mdpi

【 摘 要 】

The toxic element arsenic (As) occurs widely in solid and liquid mine wastes. Aqueous forms of arsenic are taken up in As-bearing sulfides, arsenides, sulfosalts, oxides, oxyhydroxides, Fe-oxides, -hydroxides, -oxyhydroxides and -sulfates, and Fe-, Ca-Fe- and other arsenates. Although a considerable body of research has demonstrated that microbes play a significant role in the precipitation and dissolution of these As-bearing minerals, and in the alteration of the redox state of As, in natural and simulated mining environments, the molecular-scale mechanisms of these interactions are still not well understood. Further research is required using traditional and novel mineralogical, spectroscopic and microbiological techniques to further advance this field, and to help design remediation schemes.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.