Decomposition of gas-phase chloroethenes by UV/O3 process

被引：28

作者：

Shen, YS ^{[1
]}

Ku, Y ^{[1
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei, Taiwan

来源：

WATER RESEARCH | 1998年 / 32卷 / 09期

关键词：

UV irradiation; UV/O-3; chloroethenes; mineralization; dechlorination;

D O I：

10.1016/S0043-1354(98)00045-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photolytic behaviors of gas-phase I,1-dichloroethylene (DCE), trichloroethylene (TCE), and perchloroethylene (PCE) in air streams by ultraviolet irradiation and UV/O-3 process were studied. The addition of ozone slightly improved the removal of TCE by UV/O-3 process, and excessive ozone would reduce the treatment efficiency of TCE. The enhancement of UV light intensity would promote the decomposition of TCE more effectively than the supplement of ozone. The mineralization and dechlorination of chloroethylenes by UV photolysis can be apparently promoted in presence with ozone and were affected by the number of chlorine atom substituted on the CC bond. The photolytic behaviors bf TCE and the individual contribution to the decomposition of TCE by UV direct photolysis and by OH destruction in the UV/O-3/TCE system were well modeled by the proposed decomposition scheme. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：2669 / 2679

页数：11

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