THE OZONATION OF ORGANIC HALIDE PRECURSORS - EFFECT OF BICARBONATE

被引:77
作者
RECKHOW, DA
LEGUBE, B
SINGER, PC
机构
[1] UNIV N CAROLINA,DEPT ENVIRONM SCI & ENGN,CHAPEL HILL,NC 27514
[2] UNIV POITIERS,F-86022 POITIERS,FRANCE
关键词
ACIDS - ORGANIC COMPOUNDS - OZONE - WATER TREATMENT;
D O I
10.1016/0043-1354(86)90040-0
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A laboratory study of the effect of bicarbonate on the ozonation of organic halide precursors in fulvic acid solutions and in a raw drinking water was conducted. The experimental variables were bicarbonate concentration, ozone dose and pH of chlorination. Results are expressed in terms of trihalomethane (THM), total organic halide (TOX), trichloroacetic acid, dichloroacetic acid, trichloroacetone and dichloroacetonitrile precursor concentrations. Kinetic studies showed that bicarbonate slowed the decomposition of ozone in the presence of fulvic acid, and thereby, led to a greater degree of destruction of u. v. -absorbing substances. Similarly, precursor destruction increased with increasing bicarbonate concentrations in the range of 10** minus **4-10** minus **2 M. Precursor destruction was greatest when chlorination was performed at low pH.
引用
收藏
页码:987 / 998
页数:12
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