%0 Journal Article
%T Biotransformation of nonylphenol ethoxylates during sewage treatment under anaerobic and aerobic conditions
%A ZHANG Jing
%A YANG Min
%A ZHANG Yu
%A CHEN Meixue
%A <br>ZHANG Jing
%A YANG Min
%A ZHANG Yu
%A CHEN Meixue
%J 环境科学学报(英文版)
%D 2008
%I 
%X Biotransformation of nonylphenol ethoxylates (NPEOs) during continuous anaerobic sewage treatment was compared with the aerobic treatment of sewage spiked with 23 micromol/L technical NPEOs over a period of 90 d. Immediate degradation of NPEOs was observed under both anaerobic and aerobic conditions, indicating that the enzymes and bacteria required for NPEO degradation existed abundantly in both aerobic and anaerobic sludge. Both treatments achieved high removal (> 92%) of the spiked NPEO9 mixture. Liquid chromatography-mass spectrometry (LC-MS) analysis showed that short-chain NPEOs (NPEO1-NPEO3) accumulated in anaerobic (2.01-2.56 micromol/L) and aerobic (1.62-2.03 micromol/L) effluents, with nonylphenol (NP) (0.24-0.31 micromol/L) as another group of metabolites in the anaerobic effluent, and nonylphenoxy carboxylates (NPECs) (2.79-3.30 micromol/L) in the aerobic effluent. Significant accumulation of NP in the anaerobic sludge and NPEO1-3 in the sludge of two reactors was observed. These results indicated that it was difficult to control these harmful metabolites in the conventional treatment processes. Denaturing gradient gel electrophoresis profiles of sludge samples support the speculation that the NPEO degradation bacteria might be the dominant indigenous species.
%K biodegradation
%K nonylphenol
%K nonylphenol ethoxylate
%K nonylphenoxy carboxylates
%K sewage treatment<br>污水处理
%K 生物转化
%K 乙氧基壬基酚
%K 厌氧处理
%K 需氧处理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=7105E2BF9964DC5FD45A49A7198E1883&yid=67289AFF6305E306&vid=A04140E723CB732E&iid=0B39A22176CE99FB&sid=5E25104E99903E8A&eid=A8DE7703CC9E390F&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=2&reference_num=31