Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 668, Issue -, Pages 958-965Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.03.078
Keywords
Decabromodiphenyl ether; Function prediction; Microbial consortium; Toxicity assessment; Biodegradation
Categories
Funding
- National Natural Science Foundation of China [U1501234, 41673091, 41573091]
- National Key Research and Development Program of China [2018YFC1802800]
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GY1, a novel microbial consortium with efficient ability to degrade decabromodiphenyl ether (BDE-209) has been isolated and the sequencing analysis has been conducted. The results revealed that Hyphomicrobium, Pseudomonas, Aminobacter, Sphingopyxis, Chryseobacterium, Bacillus, Pseudaminobacter, Stenotrophomonas, Sphingobacterium and Microbacterium were the dominant genera, and the function genes involved in BDE-209 conversion were predicted by PICRUSt. When BDE-209 concentration increased from 05 to 10 mg/L, its degradation efficiency declined from 57.2% to 22.3%. Various kinds of debrominated metabolites were detected during the biodegradation process, including BDE-208, BDE-207, BDE-206, BDE-205, BDE-190, BDE-181, BDE-155, BDE-154, BDE-99, BDE-47, BDE-17 and BDE-7. Also, the proportion of necrotic cells was observed during GY1 mediated degradation of BDE-209 to reveal the changes of cells viability under BDE-209 stress. Subsequent analysis showed that the reaction of BDE-209 with GY1 was a detoxification process and bioaugmentation with GY1 effectively enhanced BDE-209 degradation in actual water and water-sediment system. (C) 2019 Elsevier B.V. All rights reserved.
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