Journal ArticleDOI
Bioremediation of Cr(VI) from Chromium-Contaminated Wastewater by Free and Immobilized Cells of Cellulosimicrobium cellulans KUCr3
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TLDR
It is suggested that KUCr3 could be used as a candidate for possible environmental clean up operation with respect to Cr(VI) bioremediation.Abstract:
In this report, possible utilization of a chromium-reducing bacterial strain Cellulosimicrobium cellulans KUCr3 for effective bioremediation of hexavalent chromium (Cr(VI))-containing wastewater fed with tannery effluents has been discussed. Cr(VI) reduction and bioremediation were found to be related to the growth supportive conditions in wastewater, which is indicative of cell mass dependency for Cr(VI) reduction. Cr(VI) reduction was determined by measuring the residual Cr(VI) in the cell-free supernatant using colorimetric reagent S-diphenylcarbazide. Nutrient availability and initial cell density showed a positive relation with Cr(VI) reduction, but it was inhibited with increasing concentration of Cr(VI) under laboratory condition. The optimum temperature and pH for effective Cr(VI) reduction in wastewater were found to be 35°C and 7.5, respectively. The viable cells of KUCr3 were successfully entrapped in an agarose bead that was used in continuous column and batch culture for assaying Cr(...read more
Citations
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Journal ArticleDOI
Hexavalent chromium reduction potential of Cellulosimicrobium sp. isolated from common effluent treatment plant of tannery industries.
TL;DR: This multi-drug and multi-metal resistant bacterium can be used as a potential agent for the effective bioremediation of metal contaminated sites.
Journal ArticleDOI
Cr(VI) reduction and Cr(III) immobilization by Acinetobacter sp. HK-1 with the assistance of a novel quinone/graphene oxide composite.
TL;DR: The findings indicate that the application of strain HK-1 and NQ-GO is a promising strategy for enhancing the treatment of Cr(VI)-containing wastewater.
Journal ArticleDOI
Improvement of simultaneous Cr(VI) and phenol removal by an immobilised bacterial consortium and characterisation of biodegradation products.
TL;DR: The ability of SFC 500-1 for simultaneous removal was improved through its entrapment in a Ca-alginate matrix, which led to an increased removal of Cr(VI) and phenol removal, which was partially reduced to Cr(III).
Journal ArticleDOI
Optimization of cultural conditions of Arthrobacter sp. Sphe3 for growth-associated chromate(VI) reduction in free and immobilized cell systems
TL;DR: Arthrobacter sp.
Journal ArticleDOI
Hexavalent chromium reducing bacteria: mechanism of reduction and characteristics.
Jia Chen,Yongqiang Tian +1 more
TL;DR: In this paper, a review describes how bacteria tolerate and reduce chromium and the effects of some physical and chemical factors on the reduction of Cr(IV), and practical applications for chromium reduction of bacterial cells are also included in this review.
References
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TL;DR: It is demonstrated that knowledge of interconversion processes between different Cr forms is necessary to understand its behaviour and role in the environment, in addition to enabling reliable Cr speciation analysis to be performed.
Journal ArticleDOI
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TL;DR: The results showed that chromate reduction by CRB5 was mediated by a soluble enzyme that was largely contained in the cytoplasm but also found outside of the cells, and may account for anaerobic reduction of chromate under nongrowth conditions with an organic electron donor present.
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