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Abstract - Issue Nov 2012, 33 (6) Back
nstantaneous and historical temperature effects on a-pinene
Biodegradation of
Benzo[a]pyrene by the mixed culture of Bacillus cereus and Bacillus
vireti isolated from the petrochemical industry
Author
Details
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Ramya
Mohandass (Corresponding author)
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Department of Genetic Engineering, SRM University, Kattankulathur,
Chennai - 603 023, India
e-mail : ramya.mohandass@gmail.com
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Pallabi
Rout
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Department of Biotechnology, SRM
University, Chennai
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Sonia
Jiwal
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Department
of Biotechnology, SRM University, Chennai
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Chitrambalam
Sasikala
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Department
of Genetic Engineering, SRM University, Chennai - 603 023, India
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Publication
Data
Paper received:
08 February 2011
Revised received:
08 July 2011
Accepted:
06 August 2011
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Abstract
Polycyclic aromatic hydrocarbons are a group
of compounds that pose threat to humans and animal life. Methods to reduce
the amount of PAHs in the environment are continuously being sought. The
bacterial consortium capable of utilizing benzo(a)pyrene as the sole source
of carbon and energy was isolated from petrochemical soil. The isolates were
identified as Bacillus cereus and Bacillus vireti based on
morphological characterization, and 16S rDNA gene sequence analysis. About
58.98 % of benzo(a)pyrene at concentration of 500 mg l-1 in mineral salts
medium were removed by bacterial consortium. GC mass spectral analysis showed
the presence of metabolite cis-4-(7-hydroxypyren-8-yl)-2-oxobut-3enoic acid.
The results indicate that the bacterial consortium is a new bacterial
resource for biodegrading benzo(a)pyrene and might be used for bioremediation
of sites heavily contaminated by benzo[a]pyrene and its derivatives.
Key words
Benzo(a) pyrene, Bacillus cereus, Bacillus vireti, Biodegration,
Mixed culture
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