Anaerobic biodegradation of polycyclic aromatic hydrocarbon in soil

被引:182
作者
Chang, BV [1 ]
Shiung, LC [1 ]
Yuan, SY [1 ]
机构
[1] Soochow Univ, Dept Microbiol, Taipei 111, Taiwan
关键词
PAH; anaerobic; biodegradation; soil; methanogen;
D O I
10.1016/S0045-6535(02)00151-0
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Known concentrations of phenanthrene, pyrene, anthracene, fluorene and acenapthene were added to soil samples to investigate the anaerobic degradation potential of polycyclic aromatic hydrocarbon (PAH). Consortia-treated river sediments taken from known sites of long-term pollution were added as inoculum. Mixtures of soil, consortia, and PAH (individually or combined) were amended with nutrients and batch incubated. High-to-low degradation rates for both soil types were phenanthrene > pyrene > anthracene > fluorene > acenaphthene. Degradation rates were faster in Taida soil than in Guishan soil. Faster individual PAH degradation rates were also observed in cultures containing a mixture of PAH substrates compared to the presence of a single substrate. Optimal incubation conditions were noted as pH 8.0 and 30 degreesC. Degradation was enhanced for PAH by the addition of acetate, lactate, or pyruvate. The addition of municipal sewage or oil refinery sludge to the soil samples stimulated PAH degradation. Biodegradation was also measured under three anaerobic conditions; results show the high-to-low order of biodegradation rates to be sulfate-reducing conditions > methanogenic conditions > nitrate-reducing conditions. The results show that sulfate-reducing bacteria, methanogen, and eubacteria are involved in the PAH degradation; sulfate-reducing bacteria constitute a major component of the PAH-adapted consortia. (C) 2002 Published by Elsevier Science Ltd.
引用
收藏
页码:717 / 724
页数:8
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