瞬态吸收光谱技术研究4-氯酚水相降解的微观反应  

STUDIES ON MICROSCOPIC REACTIONS IN DEGRADATIONPROGRESS OF 4-CHLOROPHENOL IN WATER SOLUTION WITHTRANSIENT ABSORPYION SPECTRUM

作　　者：王淑惠[1] 于勇[1] 潘循皙[1] 侯惠奇[1] 

机构地区：[1]复旦大学环境科学研究所,上海200433

出　　处：《环境化学》2001年第2期160-167,共8页Environmental Chemistry

基　　金：国家自然科学基金资助项目;批准号:29777003

摘　　要：利用瞬态吸收光谱技术进行了不同条件下４－氯酚水溶液的电子脉冲辐解,分别研究了体系中瞬时出现的·ＯＨ,Ｈ和水合电子等活性粒子与溶质的反应．对瞬态吸收光谱中的主要吸收峰做了归属,得到了ＯＨ－ａｄｄｕｃｔ,Ｈ－ａｄｄｕｔ和氯代酚氧基等一系列中间产物,并初步研究了这些瞬态物种的生长、衰减行为和可能的反应机理,得出了一些微观反应的速率常数．The pulse radiolysis of 4-chlorophenol in different water solutions was studied with transient ab-sorption spectrum. In this system, active particles such as·OH radical, hydrated electron and H atom that result from radiolysis of water can react with the solute. We studied the main absorption peaks in these spectra and found the main intermediate products such as OH-adduct, H-adduct and chlorinated phenoxyl radical. The build-up and decay of the transient species as well as the reaction mechanism were also studied. Several reaction rate constants were calculated.

关 键 词：有机污染物 4-氯酚 自由基 瞬态吸收光谱 脉冲辐解 水相降解 

分 类 号：O657.3[理学—分析化学]