title: The impact of changes in source water quality on trihalomethane and haloacetonitrile formation in chlorinated drinking water.
abstract: This study examined the formation of disinfection by-products (DBPs), including nitrogenous DBPs, haloacetonitriles (HANs), and carbonaceous DBPs, trihalomethanes (THMs), upon chlorination of water samples collected from a conventional Chinese surface water treatment plant (i.e. applying coagulation, sedimentation, and filtration). Reductions in the average concentrations (and range, shown in brackets) of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) from 4.8 (3.0-7.3) μg/L and 0.52 (0.20-0.81) μg/L in 2010 to 2.4 (1.4-3.7) μg/L and 0.17 (0.11-0.31) μg/L in 2012, respectively, led to a decrease in HANs and THMs from 5.3 and 28.5 μg/L initially to 0.85 and 8.2 μg/L, as average concentrations, respectively. The bromide concentration in the source water also decreased from 2010 to 2012, but the bromine incorporation factor (BIF) for the THMs did not change significantly; however, for HAN the BIFs increased because the reduction in DON was higher than that of bromide. There was good linear relationship between DOC and THM concentrations, but not between DON and HANs.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
authors.forename: Chonghua
authors.initials: C
authors.lastname: Xue
authors.affiliation: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. Electronic address: feedwater@126.com.
authors.forename: Wenhai
authors.initials: W
authors.lastname: Chu
authors.affiliation: Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK.
authors.forename: Michael R
authors.initials: MR
authors.lastname: Templeton
mesh_terms: D000097:Acetonitriles / Q000737:chemistry*; D002681:China; D004203:Disinfection; D060766:Drinking Water / Q000032:analysis*; D054879:Halogenation; D022882:Trihalomethanes / Q000737:chemistry*; D018508:Water Purification; D060753:Water Quality
chemical_list: D000097:Acetonitriles; D060766:Drinking Water; D022882:Trihalomethanes
keywords: Dissolved organic nitrogen; Drinking water; Haloacetonitriles; Nitrogenous disinfection by-products; Source water; Trihalomethanes