توضیحات :
Journal of Advances in Environmental Health Research
Volume 5, Issue 4, Autumn 2017
Authors : Mohsen Mesbahi-Nowrouzi , Nasrin Mollania , Khosro Khajeh
Abstract :
In this work, CKCr-6A strain was found to be highly resistant to some toxic heavy metals such asCr+6, Cr+3, Cu+2, Co+2, Cd+2, Pb+2, Hg+2, U+6, tellurium, and selenite. Herein, high chromate toleranceof an isolated strain is reported with a high minimum inhibitory concentration value of80,000 mg/Land the effective parameters (pH, temperature, shaking, and glucose concentration) were selectedforCr(VI) removal by this isolated strain. Cr(VI) elimination by the target strain increased with glucoseaddition to the culture medium. We optimized the possible parameters and their interactions usingdesign experimental software. After optimization, this strain showed high efficiency in detoxifyingchromate; this could reduce up to 100 mg/L of Cr(VI) to Cr(III) over3 h. The CKCr-6A strainexhibited ability to in vitro reduction after 3 h and repeated removing of Cr(VI) without anyamendment of nutrients, suggesting its possible application in continuous bioremediation.
Keyword : Bioremediation, Carcinogenic Cr(VI), Chromium reduction, Reductase, Response
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