Bioremediation of chromium solutions and chromium containing wastewaters
- 30 October 2014
- journal article
- review article
- Published by Taylor & Francis Ltd in Critical Reviews in Microbiology
- Vol. 42 (4), 607-633
- https://doi.org/10.3109/1040841x.2014.974501
Abstract
Cr(VI) represents a serious threat to human health, living resources and ecological system as it is persistent, carcinogenic and toxic, whereas, Cr(III), another stable oxidation state of Cr, is less toxic and can be readily precipitated out of solution. The conventional methods of Cr(VI) removal from wastewaters comprise of chemical reduction followed by chemical precipitation. However, these methods utilize large amounts of chemicals and generate toxic sludge. This necessitates the need for devising an eco-technological strategy that would use the untapped potential of the biological world for remediation of Cr(VI) containing wastewaters. Among several viable approaches, biotransformation of Cr(VI) to relatively non-toxic Cr(III) by chromium resistant bacteria offers an economical- and environment-friendly option for its detoxification. Various studies on use of Cr(VI) tolerant viable bacterial isolates for treatment of Cr(VI) containing solutions and wastewater have been reported. Therefore, a detailed account of mechanisms and processes involved in bioreduction of Cr(VI) from solutions and wastewaters by bacterial isolates are the focus of this review article in addition to a discussion on toxicity of Cr(VI) on bacterial strains and various factors affecting Cr(VI) bioreduction.Keywords
This publication has 102 references indexed in Scilit:
- Comparative evaluations on bio-treatment of hexavalent chromate by resting cells of Pseudochrobactrum sp. and Proteus sp. in wastewaterJournal of Environmental Management, 2013
- Identification and hexavalent chromium reduction characteristics of Pannonibacter phragmitetusBioprocess and Biosystems Engineering, 2011
- Hexavalent Chromium Reduction and Accumulation by Acinetobacter AB1 Isolated from Fez Tanneries in MoroccoIndian Journal of Microbiology, 2011
- Biosorption of chromium from aqueous solution and electroplating wastewater using mixture of Candida lipolytica and dewatered sewage sludgeBioresource Technology, 2010
- Different physiological responses to chromate and dichromate in the chromium resistant and reducing strain Ochrobactrum tritici 5bvl1BioMetals, 2010
- Simultaneous Cr(VI) reduction and phenol degradation in pure cultures of Pseudomonas aeruginosa CCTCC AB91095Bioresource Technology, 2009
- Hexavalent chromate reduction by immobilized Streptomyces griseusBiotechnology Letters, 2008
- Bacterial removal of chromium (VI) and (III) in a continuous systemBiodegradation, 2006
- Pyridine-2,6-bis(thiocarboxylic acid) Produced by Pseudomonas stutzeri KC Reduces Chromium(VI) and Precipitates Mercury, Cadmium, Lead and ArsenicBioMetals, 2006
- Reduction of Cr(VI) by a Bacillus sp.Biotechnology Letters, 2006