Characterisation of Cr(VI) generation in chromite mine overburden and its toxic impact on microbial diversity
by Biswaranjan Dhal; Banshi Dhar Pandey
International Journal of Environment and Waste Management (IJEWM), Vol. 20, No. 4, 2017

Abstract: This study aims at the assessment of the environmental status and microbial diversity prevailing in the overburden soil of South Kaliapani chromite mine area, Sukinda, India. It is found that the overburden soils/dumps are dry and semi-hard rocky material, and contain low nutrients (N, P, K and organic carbon). Major metal components present in the dump soils are (wt%): 2-24 Cr, 33-58 Fe, 0.4-0.5 Mn, 0.5-1.2 Ni, and 0.02-0.04 Co. The overburden soils have low microbial population (bacteria 7 − 29 × 105 colony forming units (cfu) g−1 and fungi 3 − 9 × 105 cfu g−1) due to the presence of Cr(VI), a toxic pollutant. The water samples contained Cr(VI) (0.97 mg L−1) and Co (0.345 mg L−1), which were higher than the permissible limits. Oxidation of Cr(III) of the chromite mineral present in the chromite ore overburden (COB) by manganese oxides is indicated by SEM-EDS studies which causes Cr(VI) pollution and affects microbial diversity.

Online publication date: Tue, 27-Feb-2018

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Environment and Waste Management (IJEWM):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email