alexa Efficient Aerobic Degradation of Various Azo Dyes by a <em>Sphingomonas sp</em> Isolated from Petroleum Sludge | OMICS International | Abstract
ISSN: 2155-6199

Journal of Bioremediation & Biodegradation
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Research Article

Efficient Aerobic Degradation of Various Azo Dyes by a Sphingomonas sp Isolated from Petroleum Sludge

Liaquat Ali1, Huda Alhassani1, Noushad Karuvantevida2, Muhammad A. Rauf1 and S. Salman Ashraf1*
1Department of Chemistry, College of Science, UAE University, Al-Ain, UAE
2Department of Biology, College of Science, UAE University, Al-Ain, UAE
Corresponding Author : Salman Ashraf
Department of Chemistry, College of Science
UAE University, Al-Ain, UAE
Tel: 971 3 713-6148
E-mail: [email protected]
Received March 31, 2014; Accepted April 24, 2014; Published April 30, 2014
Citation: Ali L, Alhassani H, Karuvantevida N, Rauf MA, Ashraf SS (2014) Efficient Aerobic Degradation of Various Azo Dyes by a Sphingomonas sp Isolated from Petroleum Sludge. J Bioremed Biodeg 5:223. doi:10.4172/2155-6199.1000223
Copyright: © 2014 Ali L, et al. This is an open-a ccess 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 extensive discharge of textile dyes in industrial wastewater and the recalcitrant nature of azo dyes have fueled a strong interest in exploring efficient and environmentally friendly approaches for wastewater remediation. In this present study, we report on the isolation and characterization of a Sphingomonas sp. strain from petroleum sludge that was capable of efficiently degrading various classes of dyes. A subsequent detailed analysis using a panel of 12 azo dyes showed that this strain was capable of efficient aerobic degradation of at least 7 diverse azo dyes. Furthermore, these dyes could also be degraded (more than 70% in 24 hours) under static (anaerobic) culture conditions by this Sphingomonas sp. Lastly, HPLC analysis of the metabolites of three different azo dyes showed that depending on the availability of oxygen during the culturing and dye degradation process, and different sets of metabolites could be produced from these dyes. The current study establishes the usefulness of screening petroleum sludge for the isolation of novel bacterial strains for efficient bioremediation and highlights the different degradative pathways that are taken during aerobic and anaerobic bacterial dye degradation processes

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