Interaction of polybrominated diphenyl ethers and aerobic granular sludge: biosorption and microbial degradation.

Interaction of polybrominated diphenyl ethers and aerobic granular sludge: biosorption and microbial degradation.
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多溴二苯醚与好氧颗粒污泥的相互作用:生物吸附和微生物降解

DOI:
10.1155/2014/274620
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发表时间:
2014
影响因子:
--
通讯作者:
Zheng Z
Zheng Z
中科院分区:
生物学3区
文献类型:
--
作者:
Ni SQ;Cui Q;Zheng Z

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多溴联苯醚(PBDEs)作为一类新型持久性有机污染物,已成为全球普遍存在的环境污染物。没有关于十溴二苯醚(BDE-209)的好氧生物转化的文献。在此,我们研究了PBDEs与好氧颗粒污泥的相互作用。结果表明,废水中BDE-209的去除主要是通过好氧颗粒污泥的吸附作用实现的。吸附能力随温度、接触时间、污泥投加量的增加或溶液pH的降低而增加。离子强度对BDE-209的吸附有负面影响。修正的准一级动力学模型较好地描述了吸附动力学。在操作的前30天内,没有发生BDE-209的微生物脱溴。进一步的研究发现,4,4‘-二溴二苯醚的好氧微生物降解伴随着较低BDE同系物的产生。
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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发表时间: 2008-04-15
影响因子: 11.4
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