Biodegradation of decabromodiphenyl ether (BDE 209) by a newly isolated bacterium from an e-waste recycling area

AMB Express
Zhineng WuYingying Wang

Abstract

Polybrominated diphenyl ethers (PBDEs) have become widespread environmental pollutants all over the world. A newly isolated bacterium from an e-waste recycling area, Stenotrophomonas sp. strain WZN-1, can degrade decabromodiphenyl ether (BDE 209) effectively under aerobic conditions. Orthogonal test results showed that the optimum conditions for BDE 209 biodegradation were pH 5, 25 °C, 0.5% salinity, 150 mL minimal salt medium volume. Under the optimized condition, strain WZN-1 could degrade 55.15% of 65 μg/L BDE 209 under aerobic condition within 30 day incubation. Moreover, BDE 209 degradation kinetics was fitted to a first-order kinetics model. The biodegradation mechanism of BDE 209 by strain WZN-1 were supposed to be three possible metabolic pathways: debromination, hydroxylation, and ring opening processes. Four BDE 209 degradation genes, including one hydrolase, one dioxygenase and two dehalogenases, were identified based on the complete genome sequencing of strain WZN-1. The real-time qPCR demonstrated that the expression level of four identified genes were significantly induced by BDE 209, and they played an important role in the degradation process. This study is the first to demonstrate that the newly isolated Stenot...Continue Reading

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Citations

Sep 30, 2020·Environmental Science and Pollution Research International·Yi-Tang ChangStephen A Boyd
Sep 11, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Ke ZhangJia Chen
Jul 24, 2021·Environmental Science and Pollution Research International·Carlos Alberto de AlbuquerqueValquíria Claret Dos Santos

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Datasets Mentioned

BETA
KY000522
CP021768

Methods Mentioned

BETA
PCR
scanning electron microscopy
electrophoresis

Software Mentioned

BLAST
Primer Premier
ClustalW
MEGA

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