Biodegradation of benzo[a]pyrene by bacterial consortium isolated from mangrove sediment

Aziz, A. and Agamuthu, Pariatamby and Alaribe, Frank Ogenna and Fauziah, Shahul Hamid (2018) Biodegradation of benzo[a]pyrene by bacterial consortium isolated from mangrove sediment. Environmental Technology, 39 (4). pp. 527-535. ISSN 0959-3330

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Official URL: https://doi.org/10.1080/09593330.2017.1305455

Abstract

Benzo[a]pyrene is a high-molecular-weight polycyclic aromatic hydrocarbon highly recalcitrant in nature and thus harms the ecosystem and/or human health. Therefore, its removal from the marine environment is crucial. This research focuses on benzo[a]pyrene degradation by using enriched bacterial isolates in consortium under saline conditions. Bacterial isolates capable of using benzo[a]pyrene as sole source of carbon and energy were isolated from enriched mangrove sediment. These isolates were identified as Ochrobactrum anthropi, Stenotrophomonas acidaminiphila, and Aeromonas salmonicida ss salmonicida. Isolated O. anthropi and S. acidaminiphila degraded 26% and 20%, respectively, of an initial benzo[a]pyrene concentration of 20 mg/L after 8 days of incubation in seawater (28 ppm of NaCl). Meanwhile, the bacterial consortium decomposed 41% of an initial 50 mg/L benzo[a]pyrene concentration after 8 days of incubation in seawater (28 ppm of NaCl). The degradation efficiency of benzo[a]pyrene increased to 54%, when phenanthrene was supplemented as a co-metabolic substrate. The order of biodegradation rate by temperature was 30°C > 25°C > 35°C. Our results suggest that co-metabolism by the consortium could be a promising biodegradation strategy for benzo[a]pyrene in seawater.

Item Type: Article
Uncontrolled Keywords: Benzo[a]pyrene; biodegradation; co-metabolism; bacterial consortium
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 18 Sep 2019 03:44
Last Modified: 18 Sep 2019 03:44
URI: http://eprints.um.edu.my/id/eprint/22411

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