谢晴

Senior Engineer  

Gender:Female

Alma Mater:大连理工大学

Degree:Doctoral Degree

School/Department:环境学院

Discipline:Environmental Engineering

Business Address:环境楼A315

E-Mail:qingxie@dlut.edu.cn


Paper Publications

水相中五种MeO-PBDEs与羟基自由基反应的动力学和产物

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Indexed by:会议论文

Date of Publication:2014-07-11

Page Number:1-1

Key Words:MeO-PBDEs ·OH k·OH 降解产物

Abstract:近年来,由于甲氧基多溴联苯醚(MeO-PBDEs)具有内分泌干扰等毒理学效应而受到广泛的关注.然而,对于其在自然水环境中的降解行为研究却鲜有报道.前人研究表明与羟基自由基(·OH)反应是MeO-PBDEs类似物多溴联苯醚(PBDEs)和羟基多溴联苯醚(HO-PBDEs)等在水环境中的重要降解方式之一[1-4],因此推测MeO-PBDEs也可能会被·OH降解.本研究以水环境中检出的4'-MeO-BDE-17,5-MeO-BDE-47,5'-MeO-BDE-99,6-MeO-BDE-47和6-MeO-BDE-85为例,研究其与·OH反应的动力学和途径.结果表明:五种MeO-PBDEs与·OH的二级反应速率常数(k·OH)介于(0.531±0.015)×1010M-1S-1和(1.030±0.015)×1010M-1S-1之间,溴原子和甲氧基的取代方式可以显著影响MeO-PBDEs的k·OH值.MeO-PBDEs与·OH反应的主要途径为脱溴加氢生成低溴代MeO-PBDEs,5-MeO-BDE-47和5'-MeO-BDE-99还可以发生羟基加成反应,6-MeO-BDE-47的反应中未检测到明显的降解产物.

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