Biodegradation of polycyclic aromatic hydrocarbons by a halotolerant bacterial strain Ochrobactrum sp. VA1 |
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| Authors: | Arulazhagan P Vasudevan N |
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| Institution: | a Department of Civil and Environmental Engineering, Sung Kyun Kwan University, 300 CheonCheon-Dong, Jangan-Gu, Suwon, Gyeonggi-Do 440-746, Republic of Korea
b Centre for Environmental Studies, Anna University, Chennai 600 025, India |
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| Abstract: | 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. |
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| Keywords: | Biodegradation Polycyclic aromatic hydrocarbons Halotolerant Ochrobactrum |
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