Microbial Composite in Trivalent Chromium Remediation from Effluents

Abhilash, and Prakash, Mayuri and Mehta, K D and Pandey, B D (2011) Microbial Composite in Trivalent Chromium Remediation from Effluents. In: IIIrd International Congress on Nonferrous Metals, 7-9th Sept 2011, Krasnoyarsk,Russia.

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Chromium (III) in the industrial effluents is considered hazardous due to oxidation and therefore its remediation by alternate methodology such as biosorption has recently gained importance. Though sorption of Cr(III) on algae and fungi have been studied, their applications as fungal-clay composite is not much investigated. Growth of A.niger with bentonite showed release of spores and development of full cells in <72h facilitating good metal uptake. In this study, Aspergillus niger and bentonite have been used to develop a composite sorbent and removal of Cr(III) from a model effluent solution of 100ppm Cr(III) was investigated. A maximum sorption of 85% Cr(III) was achieved with 1%(w/v) composite (1:6 ratio of biomass to bentonite) of <50µm size within a contact time of 5 min at 2.5pH and 35oC temperature. Increasing the pH up to 4.0 caused elevation in the degree of sorption. The composite was thus found to be effective sorbent to treat chromium (III) containing waste solutions.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:http://eprints.nmlindia.org/3905
Uncontrolled Keywords:effluent, chromium(III), bentonite, Aspergillus niger, microbial composites, biosorption
Divisions:Metal Extraction and Forming
ID Code:3905
Deposited By:Dr. Abhilash .
Deposited On:08 Sep 2011 17:48
Last Modified:07 Aug 2015 14:10
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