Molecular characterization of methanogenic microbial communities for degrading various types of polycyclic aromatic hydrocarbon

Knowledge on methanogenic microbial communities associated with the degradation of polycyclic aromatic hydrocarbons (PAHs) is crucial to developing strategies for PAHs bioremediation. In this study, the linkage between the type of PAHs and microbial community structure was fully investigated through...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2019-12, Vol.86, p.97-106
Main Authors: Ye, Quanhui, Liang, Chengyue, Chen, Xunwen, Fang, Tingting, Wang, Yun, Wang, Hui
Format: Article
Language:English
Subjects:
Archaea
Bacteria
Biodegradation, Environmental
Carboxylation
Chemoautotrophic Growth
Degradation products
Degrading bacteria
Euryarchaeota
Microbial community structure
Microbiota
Polycyclic aromatic hydrocarbons
Polycyclic Aromatic Hydrocarbons - metabolism
Soil Pollutants - metabolism
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Summary:Knowledge on methanogenic microbial communities associated with the degradation of polycyclic aromatic hydrocarbons (PAHs) is crucial to developing strategies for PAHs bioremediation. In this study, the linkage between the type of PAHs and microbial community structure was fully investigated through 16S rRNA gene sequencing on four PAH-degrading cultures. Putative degradation products were also detected. Our results indicated that naphthalene (Nap)/2-methylnaphthalene (2-Nap), phenanthrene (Phe) and anthracene (Ant) sculpted different microbial communities. Among them, Nap and 2-Nap selected for similar degrading bacteria (i.e., Alicycliphilus and Thauera) and methanogens (Methanomethylovorans and Methanobacterium). Nap and 2-Nap were probably activated via carboxylation, producing 2-naphthoic acid. In contrast, Phe and Ant shaped different bacterial and archaeal communities, with Arcobacter and Acinetobacter being Phe-degraders and Thiobacillus Ant-degrader. Methanogenic archaea Methanobacterium and Methanomethylovorans predominated Phe-degrading and Ant-degrading culture, respectively. These findings can improve our understanding of natural PAHs attenuation and provide some guidance for PAHs bioremediation in methanogenic environment. [Display omitted]
ISSN:1001-0742
1878-7320
DOI:10.1016/j.jes.2019.04.027