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Polycyclic Aromatic Hydrocarbons Degrading Microflora in a Tropical Oil-Production Well |
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| Authors: | Chan Yu Jun Yao Minmin Cai Haiyan Yuan Huilun Chen Brunello Ceccanti |
| Affiliation: | 1. School of Civil and Environmental Engineering, and National “International Cooperation Based on Environment and Energy”, University of Science and Technology Beijing, Xueyuan Road No. 30, Haidian District, Beijing, 100083, People’s Republic of China 2. State Key Laboratory of Biogeology and Environmental Geology and Sino-Hungarian Joint Laboratory of Environmental Science and Health, University of Geosciences, Wuhan, 430074, People’s Republic of China 3. Institute of Ecosystem Studies (ISE), Italian National Research Council (CNR), Pisa, Italy |
| Abstract: | The surrounding environment near Dagang oil-production well suffers polycyclic aromatic hydrocarbons (PAHs) pollution. In the present study, indigenous microorganisms capable of degrading PAHs were isolated and the efficiency of PAHs removal was investigated. Seven PAH-degrading strains were isolated with the ability to grow on naphthalene, phenanthrene, pyrene and fluorene. They belonged to the genus Pseudomonas, Bacillus and Rhodococcus. The strain having the highest degrading capacity for each PAH was selected by the screening test. The removal efficiency of PAHs was found to be in the order of naphthalene > fluorene > phenanthrene > pyrene. The kinetics of PAHs degradation was then followed by liquid chromatography determination and the results showed it conforms to a first-order reaction kinetic model. This study would be highly important for investigating the ability of microorganisms to utilize PAHs as growth substrates. |
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