Disinfection byproduct precursor removal by enhanced coagulation and their distribution in chemical fractions

被引：46
作者：
Zhao, Yanmei [1 ]
Xiao, Feng [1 ]
Wang, Dongsheng [1 ]
Yan, Mingquan [2 ]
Bi, Zhe [1 ]
机构：
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
[2] Peking Univ, Dept Environm Engn, Beijing 100871, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL SCIENCES | 2013年 / 25卷 / 11期
基金：
中国国家自然科学基金;
关键词：
trihalomethanes; haloacetic acids; dissolved organic matter; chemical fractionation; enhanced coagulation; DISSOLVED ORGANIC-MATTER; DRINKING-WATER; TRIHALOMETHANE PRECURSORS; SEASONAL-VARIATIONS; HALOACETIC ACIDS; NOM; GENOTOXICITY; CHARACTER; RESERVOIR; IMPACT;
D O I：
10.1016/S1001-0742(12)60286-1
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Raw water from the Songhua River was treated by four types of coagulants, ferric chloride (FeCl3), aluminum sulfate (Al-2(SO4)(3)), polyaluminum chloride (PACl) and composite polyaluminum (HPAC), in order to remove dissolved organic matter (DOM). Considering the disinfection byproduct (DBP) precursor treatability, DOM was divided into five chemical fractions based on resin adsorption. Trihalomethane formation potential (THMFP) and haloacetic acid formation potential (HAAFP) were measured for each fraction. The results showed that hydrophobic acids (HoA), hydrophilic matter (HiM) and hydrophobic neutral (HoN) were the dominant fractions. Although both HoN and HoA were the main THM precursors, the contribution for THMFP changed after coagulation. Additionally, HoA and HiM were the main HAA precursors, while the contribution of HoN to HAAFP significantly increased after coagulation. HoM was more easily removed than HiM, no matter which coagulant was used, especially under enhanced coagulation conditions. DOC removal was highest for enhanced coagulation using FeCl3 while DBPFP was lowest using PACl. This could indicate that not all DOC fractions contained the precursors of DBPs. Reduction of THMFP and HAAFP by PACl under enhanced coagulation could reach 51% and 59% respectively.
引用
收藏
页码：2207 / 2213
页数：7
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