Anaerobic biodegradation of polycyclic aromatic hydrocarbon in soil

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 ino...

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Bibliographic Details
Published in:	Chemosphere (Oxford) Vol. 48; no. 7; pp. 717 - 724
Main Authors:	Chang, B.V, Shiung, L.C, Yuan, S.Y
Format:	Journal Article
Language:	English
Published:	Oxford Elsevier Ltd 01-08-2002 Elsevier
Subjects:	Anaerobic Anaerobiosis Applied sciences Biodegradation Biodegradation of pollutants Biodegradation, Environmental Biological and medical sciences Biotechnology Decontamination. Miscellaneous Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics Environment and pollution Exact sciences and technology Fundamental and applied biological sciences. Psychology Industrial applications and implications. Economical aspects Methanogen PAH Pollution Pollution, environment geology Polycyclic Compounds - metabolism Soil Soil and sediments pollution Soil Pollutants - metabolism Asia Taiwan Biodegradation Soil Methanogen PAH Anaerobic Anaerobiosis Microbial activity Fluorene Sulfate-reducing bacteria Biodegradability Eubacteria In situ Soil pollution Sewage sludge Decontamination Mineralization Methanogenic bacteria Bacteria Acenaphthene Microbial community Anthracene Phenanthrene Hydrocarbon Polycyclic aromatic compound Sediments Clay loam soil Pyrene Industrial waste Kinetics
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Summary:	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 °C. 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.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0045-6535 1879-1298
DOI:	10.1016/S0045-6535(02)00151-0