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Issue 81, 2015
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Production of a non-cytotoxic bioflocculant by a bacterium utilizing a petroleum hydrocarbon source and its application in heavy metal removal

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Abstract

A bacterium isolated from the activated sludge of an oil refinery of Assam, India retained efficient bioflocculating activity through production of the bioflocculant when it was grown on a crude oil amended medium void of any other carbon source. The bioflocculating activity gained from the optimized medium broth was 86.2%, which could be enhanced up to 89.1% with the purified bioflocculant. During the course of the bioflocculant production, the bacterium utilized about 77% of the petroleum hydrocarbons after incubation for 168 h when the activity was found to be the highest. The bioflocculant was efficient in flocculating Ni2+, Zn2+, Cd2+, Cu2+ and Pb2+. The bioflocculant was characterized as a glycoprotein complex by biochemical tests, FT-IR, SEM-EDX and LC/MS analyses. The bioflocculant showed negligible cytotoxicity on testing with the L292 cell line indicating the tremendous possibility of its use in bioremediation.

Graphical abstract: Production of a non-cytotoxic bioflocculant by a bacterium utilizing a petroleum hydrocarbon source and its application in heavy metal removal

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Publication details

The article was received on 09 maí 2015, accepted on 22 júl. 2015 and first published on 22 júl. 2015


Article type: Paper
DOI: 10.1039/C5RA08636A
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RSC Adv., 2015,5, 66037-66046

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    Production of a non-cytotoxic bioflocculant by a bacterium utilizing a petroleum hydrocarbon source and its application in heavy metal removal

    M. Pathak, A. Devi, K. G. Bhattacharyya, H. K. Sarma, S. Subudhi and B. Lal, RSC Adv., 2015, 5, 66037
    DOI: 10.1039/C5RA08636A

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