Removal of p-nonylphenol isomers using nitrifying sludge in a membrane sequencing batch reactor
Removal of p-nonylphenol isomers using nitrifying sludge in a membrane sequencing batch reactor
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DOI：
10.1016/j.cej.2015.07.018
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发表时间：
2015-12
影响因子：
15.1
通讯作者：
G. Buitrón;Ángeles X. Torres-Bojorges;Glenda Cea-Barcia
中科院分区：
文献类型：
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作者：
G. Buitrón;Ángeles X. Torres-Bojorges;Glenda Cea-Barcia
本研究的目的是评估生物反应器系统在硝化条件下对壬基酚的去除机制。在不添加有机碳源的情况下，在膜测序间歇式反应器中对对壬基酚异构体的技术去除进行了评估。在液相和固相中对壬基酚浓度进行了定量，以准确区分生物降解和吸附机制。主要的去除机制是蜂群-壬基酚生物降解（62%），其次是吸附，总去除率为96%。此外，氨氧化微生物控制着对壬基酚的生物降解，1,2-苯二甲酸单（2-乙基己基）酯被鉴定为主要的中间代谢产物。这些结果表明，在硝化条件下，异养微生物的共同代谢生物降解是完全矿化p- np异构体的必要条件。该研究为现有的壬基酚生物降解知识提供了重要的贡献。
The aim of this study was to assessp-nonylphenol removal mechanisms under nitrifying conditions in a bioreactor system. The removal of a technical mixture ofp-nonylphenol isomers was evaluated in a membrane sequencing batch reactor without the addition of an organic carbon source in enriched nitrifying sludge. Thep-nonylphenol concentration was quantified in the liquid and solid phases to accurately differentiate between biodegradation and sorption mechanisms. The predominant removal mechanism wasp-nonylphenol biodegradation (62%), followed by sorption, which resulted in a total removal of 96%. In addition, ammonium-oxidizing microorganisms controlled the biodegradation ofp-nonylphenol, and 1,2-benzenedicarboxylic acid, mono(2-ethylhexyl)ester was identified as the main intermediary metabolite. These results suggested that co-metabolic biodegradation by heterotrophic microorganisms is necessary to completely mineralizep-NP isomers under nitrifying conditions. This study provides an important contribution to existing knowledge of nonylphenol biodegradation.