Open AccessInteraction of Polybrominated Diphenyl Ethers and Aerobic Granular Sludge: Biosorption and Microbial Degradation
Author(s) -
ShouQing Ni,
Qingjie Cui,
Zhen Zheng
Publication year - 2014
Publication title -
biomed research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 126
eISSN - 2314-6141
pISSN - 2314-6133
DOI - 10.1155/2014/274620
Subject(s) - polybrominated diphenyl ethers , decabromodiphenyl ether , biosorption , chemistry , environmental chemistry , diphenyl ether , pollutant , adsorption , activated sludge , degradation (telecommunications) , wastewater , environmental engineering , organic chemistry , environmental science , sorption , fire retardant , telecommunications , computer science
As a new category of persistent organic pollutants, polybrominated diphenyl ethers (PBDEs) have become ubiquitous global environmental contaminants. No literature is available on the aerobic biotransformation of decabromodiphenyl ether (BDE-209). Herein, we investigated the interaction of PBDEs with aerobic granular sludge. The results show that the removal of BDE-209 from wastewater is mainly via biosorption onto aerobic granular sludge. The uptake capacity increased when temperature, contact time, and sludge dosage increased or solution pH dropped. Ionic strength had a negative influence on BDE-209 adsorption. The modified pseudo first-order kinetic model was appropriate to describe the adsorption kinetics. Microbial debromination of BDE-209 did not occur during the first 30 days of operation. Further study found that aerobic microbial degradation of 4,4 ′ -dibromodiphenyl ether happened with the production of lower BDE congeners.
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