Precursors and factors affecting formation of haloacetonitriles and chloropicrin during chlor(am)ination of nitrogenous organic compounds in drinking water

被引：74
作者：
Jia, Aiyin [1 ,2 ]
Wu, Chunde [1 ,2 ,3 ]
Duan, Yan [1 ,2 ]
机构：
[1] S China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China
[2] Minist Educ, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Guangzhou 510006, Guangdong, Peoples R China
[3] Guangdong Regular Higher Educ Inst, Key Lab Environm Protect & Ecoremediat, Guangzhou 510006, Guangdong, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2016年 / 308卷
基金：
中国国家自然科学基金;
关键词：
Haloacetonitriles; Chloropicrin; Chlorination; Chloramination; Amino acid; DISINFECTION BY-PRODUCTS; AMINO-ACIDS; CHLORINATION; CHLORAMINATION; DICHLOROACETONITRILE; HALONITROMETHANE; TRIHALOMETHANE; DBPS;
D O I：
10.1016/j.jhazmat.2016.01.037
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This study investigated the precursors and factors affecting formation of haloacetonitriles (HANs) and chloropicrin (TCNM) during chlorination/chloramination of eight amino acids in the effluent water of V-type clarifying filtration from a drinking water treatment plant. The yields of trichloroacetonitrile (TCAN), dichloroacetonitrile (DCAN) and TCNM were higher during chlorination than during chloramination. Tyrosine and tryptophan produced the greatest amount of DCAN and also generated a small amount of TCAN during chlorination process. Besides, the yields of DCAN were higher than TCNM during chlorination/chloramination. Contact time, Cl-2:org-N molar ratios, pH, temperature and bromide ion affected nitrogenous disinfection by-products (N-DBPs) formation during chlorination of tryptophan in different degrees. TCAN, DCAN and TCNM formation showed the increasing and then decreasing with prolonged contact time. Higher Cl-2:org-N molar ratios improved N-DBPs formation within a certain range. The pH affected N-DBPs formation differently. HANs increased with increasing pH from 5 to 6 and decreased with increasing pH from 6 to 9, while TCNM increased with increasing pH from 5 to 9. Higher temperatures enhanced TCNM formation, but reduced the formation of TCAN and DCAN. The presence of bromide ions improved the yields of HANs and TCNM and shifted N-DBPs to more brominated ones. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：411 / 418
页数：8
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