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Influence of microbial and synthetic surfactant on the biodegradation of atrazine.

DIR@IMTECH: CSIR-Institute of Microbial Technology

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Title Influence of microbial and synthetic surfactant on the biodegradation of atrazine.
 
Creator Singh, Anil Kumar
Cameotra, Swaranjit Singh
 
Subject QR Microbiology
 
Description The present study reports the effect of surfactants (rhamnolipids and triton X-100) on biodegradation of atrazine herbicide by strain A6, belonging to the genus Acinetobacter. The strain A6 was able to degrade nearly 80 % of the 250-ppm atrazine after 6 days of growth. The bacterium degraded atrazine by de-alkylation process. Bacterial cell surface hydrophobicity as well as atrazine solubility increased in the presence of surfactant. However, addition of surfactant to the mineral salt media reduced the rate and extent of atrazine degradation by decreasing the bioavailability of herbicide. On the contrary, addition of surfactant to atrazine-contaminated soil increased the rate and extent of biodegradation by increasing the bioavailability of herbicide. As compared to triton X-100, rhamnolipids were more efficient in enhancing microbial degradation of atrazine as a significant amount of atrazine was removed from the soil by rhamnolipids. Surfactants added for the purpose of hastening microbial degradation may have an unintended inhibitory effect on herbicide degradation depending upon contiguous condition, thus highlighting the fact that surfactant must be judiciously used in bioremediation of herbicides.
 
Publisher Springer
 
Date 2014-02
 
Type Article
PeerReviewed
 
Relation http://link.springer.com/article/10.1007%2Fs11356-013-2127-6
http://crdd.osdd.net/open/1714/
 
Identifier Singh, Anil Kumar and Cameotra, Swaranjit Singh (2014) Influence of microbial and synthetic surfactant on the biodegradation of atrazine. Environmental science and pollution research international, 21 (3). pp. 2088-97. ISSN 1614-7499