Biodegradation of polycyclic aromatic hydrocarbons by a halotolerant bacterial strain Ochrobactrum sp. VA1

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• 作者：P. Arulazhaganp>ap>p> ; p>p>arulazhagan_p@yahoo.co.inp> ; N. Vasudevanp>bp>
• 关键词：Biodegradation ; Polycyclic aromatic hydrocarbons ; Halotolerant ; Ochrobactrum
• 刊名：Marine Pollution Bulletin
• 出版年：2011
• 出版时间：February 2011
• 年：2011
• 卷：62
• 期：2
• 页码：388-394
• 全文大小：623 K

文摘

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous pollutants in the environment and are derived from both man-made and natural resources. The present study is focused on the degradation of PAHs by a halotolerant bacterial strain under saline conditions. The bacterial strain VA1 was isolated from a PAH-degrading consortium that was enriched from marine water samples that were collected from different sites at Chennai, India. In the present study, a clearing zone formed on PAH-amended mineral salt agar media confirmed the utilization of PAH by the bacterial strain VA1. The results show that the strain VA1 was able to degrade anthracene (88 % ), phenanthrene (98 % ), naphthalene (90 % ), fluorene (97 % ), pyrene (84 % ), benzo(k)fluoranthene (57 % ) and benzo(e)pyrene (50 % ) at a 30 g/L NaCl concentration. The present study reveals that the VA1 strain was able to degrade PAHs in petroleum wastewater under saline conditions. The promising PAH-degrading halotolerant bacterial strain, VA1, was identified as Ochrobactrum sp. using biochemical and molecular techniques.