Absolute rate constants for the reaction of the hydrated electron, hydroxyl radical and hydrogen atom with chloroacetones in water

被引：16

作者：

Williams, JA

Cooper, WJ

Mezyk, SP ^{[1
]}

Bartels, DM

机构：

[1] Calif State Univ Long Beach, Dept Chem & Biochem, Long Beach, CA 90840 USA

[2] Univ N Carolina, Dept Chem, Wilmington, NC 28403 USA

[3] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA

来源：

RADIATION PHYSICS AND CHEMISTRY | 2002年 / 65卷 / 4-5期

关键词：

chloroacetones; disinfection by products (DBP); advanced oxidation technology (AOT); rate constants; free radicals; aqueous electron pulse radiolysis;

D O I：

10.1016/S0969-806X(02)00351-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Bimolecular rate constants for chloroacetone (CAce), 1,1-dichloroacetone (1,1-1DCAce) and 1,1,1-trichloroacetone (1,1,1-TCAce) reaction with the aqueous electron (e(aq)(-)), the hydroxyl radical ((OH)-O-.), and the hydrogen atom (H-.) have been measured using electron pulse radiolysis in Combination with transient absorption spectroscopy (e(aq)(-), (OH)-O-.), and electron paramagnetic resonance detection (H-.). The measured rate constants with each substrate, in M(-1)s(-1) for e(aq)(-), (OH)-O-. and H-. reaction, are: CAce: (1.34+/-0.15) x 10(10), (1.69+/-0.05) x 10(8), (2.63+/-0.07) x 10(7); 1,1-DCAce: (1.22+/-0.12) x 10(10), (8.8+/-0.4) x 10(7), (2.9+/-0.3) x 10(7); and 1,1,1-TCAce: (1.56+/-0.17) x 10(10), (3.3+/-0.1) x 10(7), (2.8+/-0.2) x 10(7), respectively. The trends observed in these rate constants are discussed in terms of the initial reaction mechanisms of the three reactive species with these chloroacetones. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：327 / 334

页数：8

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