Natarajan, KA (2018) Bioremediation of arsenic using bioflocculants and microorganisms. [Book Chapter]
Full text not available from this repository.Abstract
Microbial community inhabiting mining environments, waste disposal sites, and mine waters participate in several metal-microbe redox cycles. In the case of refractory sulfidic ores containing precious metals, the gold particles are finely disseminated in pyrite–arsenopyrite matrices. Biooxidation of pyrite–arsenopyrite in the presence of acidophilic autotrophs such as At. ferrooxidans and L. ferrooxidans leads to dissolution of arsenopyrite and pyrite liberating entrapped gold particles for subsequent cyanidation recovery. Microorganisms such as At. ferrooxidans, At. thiooxidans, L. ferrooxidans, Sulfate Reducing Bacteria, Bacillus spp. as well as arsenic-tolerant Thiomonas spp. inhabit such sulfide ore deposits, mine waters, and processed mill tailings. Acid mine drainage emanating from such mines, mined over burden and tailing dams containing pyrite and arsenopyrite is a source of ground water arsenic contamination brought out by indigenous acidophilic microorganisms. In this paper, microbiological aspects of arsenic dissolution from arsenopyrite in the presence of acidophilic microorganisms are brought out with special reference to refractory sulfidic ore mineralization, abandoned mines, and tailing dams.
| Item Type: | Book Chapter |
|---|---|
| Publication: | Heavy Metals in the Environment: Microorganisms and Bioremediation |
| Publisher: | CRC Press |
| Additional Information: | The copyright for this article belongs to the CRC Press. |
| Keywords: | Arsenic; Bacteria; Bacteriology; Bioremediation; Dissolution; Economic geology; Groundwater; Groundwater pollution; Mine flooding; Ore deposits; Pyrites; Refractory materials; Refractory metals; Sulfur compounds; Tailings disposal, Acid mine drainage; Arsenic contamination; Arsenic dissolution; Microbial communities; Mining environments; Sulfate reducing bacteria; Sulfide ore deposits; Waste disposal sites, Abandoned mines |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 19 Aug 2022 06:24 |
| Last Modified: | 19 Aug 2022 06:24 |
| URI: | https://eprints.iisc.ac.in/id/eprint/76013 |
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