FORMATION OF TRICHLORONITROMETHANE FROM ASPARTIC ACID DURING UV/CHLORINE DISINFECTION

被引：0

作者：

Deng, Lin ^{[1
]}

Liu, Beibei ^{[1
]}

Liao, Xueying ^{[1
]}

Chen, Wenquan ^{[2
]}

Tan, Chaoqun ^{[1
]}

机构：

[1] Southeast Univ, Dept Municipal Engn, Nanjing 210096, Jiangsu, Peoples R China

[2] Nanjing Hydrol & Water Resources Survey Bur Jiang, Nanjing 210008, Jiangsu, Peoples R China

来源：

FRESENIUS ENVIRONMENTAL BULLETIN | 2019年 / 28卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Trichloronitromethane; Formation; UV/chlorine Disinfection; Aspartic Acid; CHLORINATION; CHLOROPICRIN; BROMIDE; WATER;

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The formation of trichloronitromethane (TCNM) was investigated during the chlorination of aspartic acid under low pressure (LP) UV irradiation (lambda=254nm). LP UV/chlorine disinfection enhanced the formation of TCNM for the first instance, furthermore the concentration of TCNM increased by 10 times in 5 mins. Then, an obvious decrease was observed in the formation of TCNM, and TCNM was nearly undetectable after 22 min. The effects of light intensity, initial concentration of aspartic acid, pH value, free chlorine concentration and the addition of tertbutanol (TBA) on the formation of TCNM were also investigated under UV/chlorine condition. The formation of TCNM increases with the increase of pH value, UV light intensity, initial concentration of aspartic acid, free chlorine concentration. TBA has a minor effect on formation of TCNM in the solution containing aspartic acid under UV/chlorine condition. So hydroxyl radical doesn't play a most important role in TCNM formation from aspartic acid under UV/chlorine. A possible integrated pathway of TCNM formation from aspartic acid is proposed under UV/chlorine. The new information obtained in this study will reduce the risk of TCNM formation during the treatment of drinking water and waste water. It will helpful for the control of TCNM formation in drinking water and sewage treatment and the development of new disinfection process.

引用

页码：4297 / 4303

页数：7

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