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Rhizospheric Biodegradation of Crude Oil from Contaminated Soil

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Present study evaluated the phytoremediation potential of Sesbania cannabina for the remediation of crude oil contaminated soils. The role of microbial and rhizospheric microbial degradation was compared in the overall total petroleum hydrocarbon (TPH) degradation. Pot experiment was conducted employing planted, un-planted and bioaugmented planted treatments to compare the plant and microbial degradation. GC-MS was used to check the TPH concentration. MPN of total oil degraders load and microbial activity was checked after 60, 90 and 120 days of plant growth. Physiological profile of bacterial community was checked by Biolog. TPH concentration decreased at faster and higher rate from 2541 to 679 mg kg−1 (73% removal rate) in planted pots after 90 days, in which the role of plant degradation was 40% and 33.3% by indigenous soil microbes. In bioaugmented planted sample slower degradation of 44% was observed after 90 days higher than unplanted control soil 33%. Heterotrophic load was higher in both planted treatments than un-planted pots. It is concluded that S. cannabina had great degradation capability and combine effect of plant and microbes were the key factors involved in higher TPH degradation in planted pots.
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Document Type: Research Article

Publication date: September 1, 2013

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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