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Cr (III) bioremoval capacities of indigenous and adapted bacterial strains from Palar river basin

Author:
Sundar, K., Mukherjee, Amitava, Sadiq, Mohammed, Chandrasekaran, N.
Source:
Journal of hazardous materials 2011 v.187 no.1-3 pp. 553-561
ISSN:
0304-3894
Subject:
Bacillus subtilis, Fourier transform infrared spectroscopy, bacteria, chromium, effluents, exopolysaccharides, tanneries, watersheds
Abstract:
The effluents from tanning industries in and around Palar river basin are the major cause of Cr (III) pollution. Forty-five chromium (III) tolerant bacterial strains were isolated from the Palar river basin. Bacillus subtilis VITSCCr01 showed tolerance up to 1500mg/l and its Cr (III) bioremoval capacity was 64%. Increasing the concentration of Cr (III) increased exopolysaccharide (EPS) production by the bacteria. FT-IR spectral studies confirmed the presence of polysaccharides in the Cr (III) treated bacteria. Adaptation of Bacillus subtilis VITSCCr01 with higher Cr (III) concentration improved the bioremoval capacity to 85%. SEM-EDX showed that the adapted bacteria accumulated high concentration of chromium. Bacillus subtilis VITSCCr01 could be used as a tool for in situ removal of Cr (III) especially in the tannery polluted environment.
Agid:
1013241