Contamination and potential biodegradation of polycyclic aromatic hydrocarbons in mangrove sediments of Xiamen, China.
Contamination and potential biodegradation of polycyclic aromatic hydrocarbons in mangrove sediments of Xiamen, China.
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DOI：
10.1016/j.marpolbul.2008.02.014
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发表时间：
2008-06
影响因子：
5.8
通讯作者：
Yun Tian;Yuan-rong Luo;T. Zheng;Lizhe Cai;Xiao-xing Cao;Chongling Yan
中科院分区：
文献类型：
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作者：
Yun Tian;Yuan-rong Luo;T. Zheng;Lizhe Cai;Xiao-xing Cao;Chongling Yan
在中国厦门枫林红树林地区建立了5个站点，对表层沉积物中多环芳烃(PAHs)浓度和多环芳烃降解菌数量进行了测定。评估土著微生物的生物降解潜力，分离出高相对分子质量(HMW)-PAH降解菌也是本工作的目的之一。结果表明，沉积物中总的多环芳烃浓度为222.59 ng−1干重，而高相对分子质量多环芳烃苯并(A)芘(BaP)在16种多环芳烃化合物中的含量最高。降解菌的数量变化范围为2.62×10~2~5.67×10~4CFUg−1干重。添加多环芳烃对提高红树林沉积物中微生物活性有较大影响。从红树林底泥中分离出一株能利用苯并苯为唯一碳源和能源的菌群，经近一年的液体培养，63d后对苯并苯的降解率为32.8%。
Five stations were established in the Fenglin mangrove area of Xiamen, China to determine the concentrations of polycyclic aromatic hydrocarbons (PAHs) and the numbers of PAH-degrading bacteria in surface sediments. Assessing the biodegradation potential of indigenous microorganisms and isolating the high molecule weight (HMW)–PAH degrading bacteria was also one of the aims of this work. The results showed that the total PAH concentration of sediments was 222.59ngg−1dry weight, whereas the HMW–PAH benzo(a)pyrene (BaP) had the highest concentration among 16 individual PAH compounds. The variation in the numbers of PAH-degrading bacteria was 2.62×102–5.67×104CFUg−1dry weight. The addition of PAHs showed a great influence in increasing the microbial activity in mangrove sediments. A bacterial consortium, which could utilize BaP as the sole source of carbon and energy, and which was isolated from mangrove sediments and enriched in liquid medium for nearly one year degraded 32.8% of BaP after 63 days incubation.