期刊
JOURNAL OF MICROBIOLOGY IMMUNOLOGY AND INFECTION
卷 50, 期 1, 页码 32-39出版社
ELSEVIER TAIWAN
DOI: 10.1016/j.jmii.2014.12.009
关键词
anaerobic degradation; BDE-28; BDE-209; microbial community
资金
- National Science Council, Republic of China [NSC100-2632-B-031-001-MY3]
Background/purpose: Polybrominated diphenyl ethers (PBDEs) are extensively used as a class of flame retardants and have become ubiquitous environmental pollutants. We aimed to uncover the changes in microbial community with PBDE anaerobic degradation with and without zero-valent iron in sediment from the Erren River, considered one of the most heavily contaminated rivers in Taiwan. Methods: PBDE anaerobic degradation in sediment was analyzed by gas chromatography with an electron capture detector. Microbial community composition was analyzed by a pyrosequencing-based metagenomic approach. Results: The anaerobic degradation rate of BDE-209 was higher than BDE-28 in sediment; the addition of zero-valent iron enhanced the degradation rates of both. In total, 19 known bacterial genera (4 major genera: Clostridium, Lysinibacillus, Rummeliibacillus, and Brevundimonas) were considered PBDE degradation-associated bacteria (sequence frequency negatively correlated with PBDE remaining percentage) as were four known archaea genera (Methanobacterium, Methanosarcina, Methanocorpusculum, and Halalkalicoccus; sequence frequency positively correlated with PBDE remaining percentage). Conclusion: The composition of bacteria and that of archaea affected the anaerobic degradation of BDE-28 and BDE-209. The addition of zero-valent iron further decreased the archaea content to undetectable levels. Copyright (C) 2015, Taiwan Society of Microbiology. Published by Elsevier Taiwan LLC.
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