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Preliminary study on PAH degradation by bacteria from contami-nated sediments in Xiamen Western Sea, Fujian, China 被引量:1

Preliminary study on PAH degradation by bacteria from contami-nated sediments in Xiamen Western Sea, Fujian, China
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摘要 In order to estimate the biodegradation of three polycyclic aromatic hydrocarbons (PAHs) compounds, bacterial strains were isolated from marine sediments in three heavily contaminated sites (Yuandang Lake, Dongdu Port and Aquacultural zones in Maluan Bay) in Xiamen Western Sea. The results show three bacterial strains, which used pyrene as the sole carbon source, were identified as strains of Aureobacterium sp., Arthrobacter sp., Rhodococcus sp. The PAH-degrading bacteria isolated had a strong ability to degrade phenan-hrene, fluoranthene and pyrene at different degradation rates. The highest degradation rate was observed when three PAH compounds were mixed with an individual strain in the medium. The three PAHs were degraded after one week with a degradation rate of 89.94 % for phenanthrene and 93.4 % for both of fluoranthene and pyrene. In addition, after 25 days of incubation, the degradation rate was 99.98 % for phenanthrene and 99.97 % for both of fluoranthene and pyrene. Optical density was measured to estimate bacterial growth during the degradation of PAHs. Highest levels of bacterial growth were observed with a three PAH mixture in the culture, suggesting that the concentration of PAHs influenced bacterial growth and the highest levels of degradation for most series were detected after one week of incubation. In order to estimate the biodegradation of three polycyclic aromatic hydrocarbons (PAHs) compounds, bacterial strains were isolated from marine sediments in three heavily contaminated sites (Yuandang Lake, Dongdu Port and Aquacultural zones in Maluan Bay) in Xiamen Western Sea. The results show three bacterial strains, which used pyrene as the sole carbon source, were identified as strains of Aureobacterium sp., Arthrobacter sp., Rhodococcus sp. The PAH-degrading bacteria isolated had a strong ability to degrade phenan-hrene, fluoranthene and pyrene at different degradation rates. The highest degradation rate was observed when three PAH compounds were mixed with an individual strain in the medium. The three PAHs were degraded after one week with a degradation rate of 89.94 % for phenanthrene and 93.4 % for both of fluoranthene and pyrene. In addition, after 25 days of incubation, the degradation rate was 99.98 % for phenanthrene and 99.97 % for both of fluoranthene and pyrene. Optical density was measured to estimate bacterial growth during the degradation of PAHs. Highest levels of bacterial growth were observed with a three PAH mixture in the culture, suggesting that the concentration of PAHs influenced bacterial growth and the highest levels of degradation for most series were detected after one week of incubation.
出处 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2004年第4期431-435,共5页 中国海洋湖沼学报(英文版)
基金 Supported by the NSFC (No.30070157 40206015) and the Scientific Fund of Quanzhou City (No. Z200234).
关键词 PAHs BIODEGRADATION BACTERIA Xiamen Western Sea PAH 生物降解 细菌 厦门海域 水体污染
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  • 1Khalid Maskaoui, Tianling Zheng , Huasheng Hong Zhiming Yu, Zhong Hu, Yun Tian, Lizhe Cai School of Life Sciences, Xiamen University, Xiamen 361005, ChinaKey Laboratory of Marine Environmental Science of SED, Xiamen 361005, ChinaKey Laboratory of Marine Ecology & Environmental Science, Chinese Academy of Sciences, Qingdao 266071, China + Corresponding author:86-592-2183217,Fax:86-592-2181510. E-mail: wshwzh @ jingxian. xmu. edu. cn.Current status of bacteriological parameters and DOC/POC in Xiamen coastal waters[J].Acta Oceanologica Sinica,2003,22(3):443-451. 被引量:2

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