DECOMPOSITION OF HUMIC-ACID AND REDUCTION OF TRIHALOMETHANE FORMATION POTENTIAL IN WATER BY OZONE WITH UV IRRADIATION

被引:42
作者
KUSAKABE, K
ASO, S
HAYASHI, JI
ISOMURA, K
MOROOKA, S
机构
[1] KYUSHU UNIV,DEPT APPL CHEM,HIGASHI KU,FUKUOKA 812,JAPAN
[2] KYUSHU UNIV,WASTE WATER TREATMENT LAB,HIGASHI KU,FUKUOKA 812,JAPAN
关键词
chloroform; destruction rate; humic acid; ozone; total organic carbon; total organic halide; trihalomethane; u.v; light;
D O I
10.1016/0043-1354(90)90036-6
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Humic acids dissolved in water are decomposed by ozone under u.v. irradiation at pH 6.9. The decomposition rate of the total organic carbon (TOC) is obtained as functions of the u.v. intensity and the residual ozone concentration, assuming the reaction obeys first order kinetics with respect to reactive TOC concentration. Major final products are acetic acid, formic acid and oxalic acid, which are refractory to ozonation and are no longer precursors of trihalomethanes. The amount of chloroform and total organic chlorides generated by chlorination are drastically decreased by u.v. irradiation. No increase in the trihalomethane formation potential is observed in the course of u.v. ozonation. © 1990.
引用
收藏
页码:781 / 785
页数:5
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