Decomposition of 2,4-dichlorophenoxyacetic acid by ozonation, ionizing radiation as well as ozonation combined with ionizing radiation

被引:54
作者
Drzewicz, P
Trojanowicz, M
Zona, R
Solar, S
Gehringer, P
机构
[1] Univ Vienna, Inst Theoret Chem & Struct Biol, A-1090 Vienna, Austria
[2] ARC Seibersdorf Res GmbH, A-2444 Seibersdorf, Austria
[3] Inst Nucl Chem & Technol, PL-03195 Warsaw, Poland
关键词
ionizing radiation; electron beam irradiation; ozone; advanced oxidation processes; 2,4-dichlorophenoxyacetic acid;
D O I
10.1016/S0969-806X(03)00471-7
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
Electron beam (EB), ozone (O-3) and the combination EB/O-3 were used to study the oxidative decomposition of 2,4-dichlorophenoxyacetic acid (2,4-D) in local tap water. Using an EB treatment, a dose of 10 kGy was required for complete 2,4-D degradation, and a 90% conversion of organic chlorine into chloride ions. Using additionally 1.33 mmol dm(-3) O-3 during irradiation, the same result was achieved with a dose of 2.7 kGy. The yields of products acetate and for-mate were almost doubled by the combined EB/O-3 treatment, compared to those obtained with the same dose by EB irradiation. Gamma radiolysis showed that the degradation dose was proportional to the initial concentration of 2,4-D in the range of 50-2260 mumol dm(-3). (C) 2003 Published by Elsevier Ltd.
引用
收藏
页码:281 / 287
页数:7
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