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Bioresource Technology
Vol. 216, 2016, Pages: 1102–1105

Biodegradation and dissolution of polyaromatic hydrocarbons by Stenotrophomonas sp

Bhagyashree Tiwari, N. Manickam, Smita Kumari, Akhilesh Tiwari

Department of Molecular and Cellular Engineering, Jacob School of Biotechnology and Bioengineering, Sam Higginbottom Institute of Agriculture, Technology and Sciences, Allahabad 211 007, India.

Abstract

The aim of this work was to study the biodegradation capabilities of a locally isolated bacterium, Stenotrophomonas sp. strain IITR87 to degrade the polycyclic aromatic hydrocarbons and also check the preferential biodegradation of polycyclic aromatic hydrocarbons (PAHs). From preferential substrate degradation studies, it was found thatStenotrophomonas sp. strain IITR87 first utilized phenanthrene (three membered ring), followed by pyrene (four membered ring), then benzo[α]pyrene (five membered ring). Dissolution study of PAHs with surfactants, rhamnolipid and tritonX-100 showed that the dissolution of PAHs increased in the presence of surfactants.

Keywords: Polycyclic aromatic hydrocarbons; Phenanthrene; Pyrene; Benzo[a]pyrene; Surfactants; Biodegradation.

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