Size and resin fractionations of dissolved organic matter and trihalomethane precursors from four typical source waters in China

被引：58

作者：

Wei, Qunshan ^{[1
]}

Wang, Dongsheng ^{[1
]}

Wei, Qia ^{[1
,2
,3
]}

Qiao, Chunguang ^{[1
]}

Shi, Baoyou ^{[1
]}

Tang, Hongxiao ^{[1
]}

机构：

[1] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China

[2] Chinese Acad Sci, Inst Urban Environm, Xiamen 361003, Peoples R China

[3] Nanchang Inst Aeronaut Technol, Dept Environm & Chem Engn, Nanchang 330063, Peoples R China

来源：

ENVIRONMENTAL MONITORING AND ASSESSMENT | 2008年 / 141卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

dissolved organic matter; disinfection by-products; fractionation; trihalomethane formation potential; ultrafiltration; UV absorbance; XAD resin;

D O I：

10.1007/s10661-007-9901-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Dissolved organic matter (DOM) and its potential to form disinfection by-products (DBPs) during drinking water treatment raise challenges to water quality control. Understanding both chemical and physical characteristics of DOM in source waters is key to better water treatment. In this study, the DOM from four typical source waters in China was fractionated by XAD resin adsorption (RA) and ultrafiltration (UF) techniques. The trihalomethane formation potential (THMFP) of all fractions in the DOM were investigated to reveal the major THM precursors. The fraction distributions of DOM could be related to their geographical origins in a certain extent. The dominant chemical fraction as THM precursors in the DOM from south waters (East-Lake reservoir in Shenzhen and Peal rivers in Guangzhou) was hydrophobic acid (HoA). The size fraction with molecular weight (MW) < 1 kDa in both south waters had the highest THMFP. The results of cluster analysis showed that the parameters of fractions including DOC percentage (DOC%), UV254%, SUVA(254) (specific UV254 absorbance) and THMFP were better for representing the differences of DOM from the studied waters than specific THMFP (STHMFP). The weak correlation between SUVA(254) and STHMFP for either size or XAD fractions suggests that whether SUVA(254) can be used as an indicator for the reactivity of THM formation is highly dependent on the nature of organic matter.

引用

页码：347 / 357

页数：11

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