| 沉积物中吸附态菲的解吸与微生物降解的相互作用 |
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| 引用本文： | 李亦然,夏星辉,冯承莲,呼丽娟,张平. 沉积物中吸附态菲的解吸与微生物降解的相互作用[J]. 环境科学学报, 2009, 29(2): 305-311 |
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| 作者姓名： | 李亦然 夏星辉 冯承莲 呼丽娟 张平 |
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| 作者单位： | 北京师范大学环境学院,水环境模拟国家重点实验室,北京,100875;中国科学院生态环境研究中心,北京,100085 |
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| 摘 要： | 从长江武汉段采集4个沉积物样品,向样品中添加菲后采用XAD-2大孔树脂模拟研究沉积物中吸附态菲的非生物解吸过程,并且利用从长江水样中分离纯化的菲降解菌进行吸附态菲的生物降解试验,比较吸附态菲的生物降解和非生物解吸过程.结果表明,菲的非生物解吸大致可分为快速、慢速和极慢速解吸3个阶段.在慢速解吸阶段,生物条件下沉积相菲浓度降低速率是其非生物解吸速率的1.9-4.0倍.微生物加速了菲从沉积物中的释放过程.微生物的活性影响沉积物中吸附态菲的微生物可利用性,在降解后期通过向体系添加微生物和营养盐,在保持微生物活性的条件下,生物降解时菲的固相残留值远小于非生物解吸条件下菲的固相残留值.吸附态菲的平均生物降解速率约为其解吸速率的1.2倍,且沉积物中与黑炭结合的菲也能部分被微生物利用.由此说明,沉积物中吸附态菲的解吸过程并不完全限制其微生物降解,微生物能够部分利用沉积物中较难解吸的吸附态菲.
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| 关 键 词： | PAHs 沉积物 生物降解 解吸 |
| 收稿时间： | 2008-03-31 |
| 修稿时间： | 2008-06-19 |
Desorption and biodegradation of attached phenanthrene in sediments |
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| LI Yiran,XIA Xinghui,FENG Chenglian,HU Lijuan and ZHANG Ping. Desorption and biodegradation of attached phenanthrene in sediments[J]. Acta Scientiae Circumstantiae, 2009, 29(2): 305-311 |
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| Authors: | LI Yiran XIA Xinghui FENG Chenglian HU Lijuan ZHANG Ping |
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| Affiliation: | LI Yiran1,XIA Xinghui1,FENG Chenglian2,HU Lijuan1,ZHANG Ping11. State Key Laboratory of Environmental Simulation , Pollution Control,School of Environment,Beijing Normal University,Beijing 1008752. Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085 |
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| Abstract: | The desorption and polycyclic aromatic hydrocarbon (PAH) biodegradation processes in Yangtze River sediments was studied. Sediment samples were collected from four sites of the Wuhan reaches of the Yangtze River; then spiked with phenanthrene.The abiotic desorption process of attached phenanthrene was studied using Amberlite XAD-2. PAH-degrading strains were isolated from the natural water of the Yangtze River, then enriched in laboratory conditions before being introduced into the experimental system. The ... |
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| Keywords: | PAHs |
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