首页|Degradation characteristic of 4-bromdiphenyl ether in mixed solutions by electron beam irradiation

Degradation characteristic of 4-bromdiphenyl ether in mixed solutions by electron beam irradiation

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The degradation characteristic of 4-bromdiphenyl ether(BDE-4)was investigated in different solutions.The study indicates that the process of direct degradation of this compound is dependent upon the bromine and the ether bond connected to diphenyl by electron beam.Laser flash photolysis was employed to determine the degradation of each species(cationic,neutral,and anionic).From these data,intermediate products of BDE-4 degradation were shown for direct irradiationdegradation.The neutral radical Was formed during the photolysis of these compounds.For all the compounds,diphenyl ether and hydroxybiphenyl were observed as common products.Reaction of the BDE-4 under electron beam was debromide.The debromide rate of BDE-4 at pH=5.5 is somewhat lower than that of BDE-4 at pH=10.0.The decomposition rate for BDE-4 is 99.8%at pH=10.0 on the dose of 14 kGy.BDE-4 from its radical could provide bromine ion into water and the cation radical of BDE-4 formed quickly recombine with hydrogen radical and formed phenyl ether.

4-bromdiphenyl ether(BDE-4)laser flash photolysiselectron beam(EB)transient absorption

SHI Wen-yan、JIAO Zheng、GU Jian-zhong、GUO Rui-yun、WU Wen-jing、XU Gang、HU Gu-yu、LEI Jian-qiu、WU Ming-hong

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School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,P.R.China

Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,P.R.China

国家自然科学基金国家自然科学基金National Key Technology Research and DevelopmeNational Key Technology Research and DevelopmeShanghai Leading Academic Discipline Project

40830744409730722008BAC32B032009BAA24B04S30109

2010

10.1007/s11741-010-0203-3

上海大学学报(英文版)
上海大学

上海大学学报(英文版)

影响因子：0.196
ISSN：1007-6417
年,卷(期)：2010.14(2)
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