Heterotrophic leaching of metals from Indian chromite mining overburden

The chromite mines spread over Sukinda ultramafic belt of Odisha, India, generate huge amount of overburden loaded with chromium along with nickel, iron and cobalt. During the present study, heterotrophic and acidogenic microbes inherent to the area (eight fungi and three bacteria) were isolated and...

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Published inInternational journal of mining, reclamation and environment Vol. 31; no. 1; pp. 66 - 77
Main Authors Ghosh, Suchhanda, Paul, A. K.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 02.01.2017
Taylor & Francis Ltd
Subjects
Aspergillus niger
Aspergillus niger mut. schiemanni
Bacteria
Bacterial leaching
Chromite
chromite mining overburden
Chromium
Cobalt
Fungal bioleaching
Fungi
heavy metal leaching
Heavy metals
Iron
Leaching
Metals
microbial metal resistance
Mines
Mining
Nickel
Overburden
Pseudomonas
Pseudomonas sp
India
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Summary:The chromite mines spread over Sukinda ultramafic belt of Odisha, India, generate huge amount of overburden loaded with chromium along with nickel, iron and cobalt. During the present study, heterotrophic and acidogenic microbes inherent to the area (eight fungi and three bacteria) were isolated and identified as suitable for leaching of metal values from overburden samples. Fungal isolates in general, were found to be better leaching agents as compared to the bacteria. Aspergillus niger mut. schiemanni SUK101, the most potent isolate leached 54.1% Ni, 29.4% Cr, 22.1% Fe and 25.1% Co, whereas, Pseudomonas sp. SUK201 leached only 15% Ni, 6.01% Cr, 5.29% Fe and 4% Co. Time course studies showed promising metal solubilisation by A. niger SUK101, which could be a potential agent for bioleaching.
Bibliography:ObjectType-Article-1
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ISSN:1748-0930
1748-0949
DOI:10.1080/17480930.2015.1118181