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ISSN: 2155-6199

Journal of Bioremediation & Biodegradation
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Research Article

Bioremediation of Crude Oil Contamination Using Microbial Surface-Active Agents: Isolation, Production and Characterization

Arumugam Gnanamani*, Varadharajan Kavitha, Narayanasamy Radhakrishnan and Asit Baran Mandal
Microbiology Division, Central Leather Research Institute, Adyar, Chennai 20, Tamil Nadu, India
Corresponding Author : A. Gnanamani
Microbiology Division
Central Leather Research Institute
Adyar, Chennai 20, Tamil Nadu, India
Tel: 91-44-24404955
Fax: 91-44-24912150
E-mail: [email protected], [email protected]
Received September 13, 2010; Accepted October 10, 2010; Published October 14, 2010
Citation: Gnanamani A, Kavitha V, Radhakrishnan N, Mandal AB (2010) Bioremediation of Crude Oil Contamination Using Microbial Surface-Active Agents: Isolation, Production and Characterization. J Bioremed Biodegrad 1:107. doi: 10.4172/2155-6199.1000107
Copyright: © 2010 Gnanamani A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

The present study highlights isolation, screening, production, characterization of marine microbial surface active agents followed by evaluating the ef fi cacy of said surface -active agents for bioremediation of crude oil contamination. Upon screening, six potential surface-active agents producing isolates of Bacillus genera with signi fi cant difference in their morphology were obtained from marine sediments of Tamil Nadu coastal area. Results from optimization studies revealed, sucrose and yeast extract were the suitable carbon and nitrogen sources for growth, pH of 7.2 ± 0.2, temperature of 37ºC and agitation at 180-200 rpm were the other optimized variables for the maximum production of surface-active agents irrespective of the bacterial isolates. Extraction and characterization studies reveals, the product was polymeric in nature with the surface activity in the range of 28 ± 4 mN/m. Thermal stability was comparable with that of synthetic surfactants and exhibit appreciable emulsifying activity and emulsion stability (more than 90 days). Laboratory scale studies on removal of crude oil from aqueous phase demonstrate, >90% of crude oil was removed within 60-120 minutes of exposure to the partially puri fi ed surface-active agents. The percentage removal showed signi fi cant difference for the six different surface-active agents .

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