Isolation and characterization of a Cr[VI] reducing Bacillus firmus strain from industrial effluents

• Autorzy: Sau G B , Chatterjee S. , Sinha S. , Mukherjee S.K.
• Języki publikacji: EN

Abstrakty

EN

A chromium resistant bacterial strain KUCr1 exhibiting potential Cr(VI) reducing ability under in vitro aerobic condition is reported. The bacterial strain showed varied degree of resistance to different heavy metals. The MIC of chromium to this strain was found to be 950 mM under aerobic culture condition in complex medium. The factors affecting Cr(VI) reduction by this strain under culture condition were evaluated. Maximal Cr(VI) reduction was observed at the pH 8 to 10 and at a temperature of 35°C. Higher concentration of Cr(VI) slowed down the reduction, eventually all the metal could be reduced with longer incubation time. Different toxic metals showed differential effect on reduction. Cadmium and zinc were found to inhibit reduction. Cr(VI) reduction and bioremediation were found to be related to the growth supportive condition in terms of carbon, phosphorous and nitrogen supply in wastewater fed with tannery effluent indicating cell mass dependency of Cr(VI) reduction. Through biochemical characterization and 16S rDNA sequence analysis, the strain KUCr1, as the name given to it, was identified as a strain of Bacillus firmus.

Słowa kluczowe

EN

industrial effluent; chromium resistant bacterial strain; hexavalent chromium reduction; ambient factor; bioremediation; Bacillus firmus

• Wydawca: -
• Czasopismo: Polish Journal of Microbiology
• Rocznik: 2008
• Tom: 57
• Numer: 4
• Opis fizyczny: p.327-332,fig.,ref.

Twórcy

autor

Sau G B

• University of Kalyani, Kalyani 741235, India

autor

Chatterjee S.

autor

Sinha S.

autor

Mukherjee S.K.

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