title: Spatial and temporal evaluations of disinfection by-products in drinking water distribution systems in Beijing, China.
abstract: Disinfection by-products were determined in 15 water treatment plants in Beijing City. The effects of different water sources (surface water source, mixture water source and ground water source), seasonal variation and spatial variation were examined. Trihalomethanes and haloacetic acids were the major disinfection by-products found in all treated water samples, which accounted for 42.6% and 38.1% of all disinfection by-products respectively. Other disinfection by-products including haloacetonitriles, chloral hydrate, haloketones and chloropicrin were usually detected in treated water samples but at lower concentrations. The levels of disinfection by-products in drinking water varied with different water sources and followed the order: surface water source > mixture water source > ground water source. High spatial and seasonal variation of disinfection by-products in the drinking water of Beijing was shown as a result.
authors.affiliation: Beijing Center for Disease Control and Prevention, Beijing 100013, China.
authors.forename: Jianrong
authors.initials: J
authors.lastname: Wei
authors.forename: Bixiong
authors.initials: B
authors.lastname: Ye
authors.forename: Wuyi
authors.initials: W
authors.lastname: Wang
authors.forename: Linsheng
authors.initials: L
authors.lastname: Yang
authors.forename: Jing
authors.initials: J
authors.lastname: Tao
authors.forename: Zhiyu
authors.initials: Z
authors.lastname: Hang
mesh_terms: D019342:Acetic Acid / Q000032:analysis; D000097:Acetonitriles / Q000032:analysis; D002681:China; D002697:Chloral Hydrate / Q000032:analysis; D004202:Disinfectants / Q000032:analysis*; D004203:Disinfection; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D012621:Seasons; D022882:Trihalomethanes / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification; D014881:Water Supply / Q000032:analysis*
chemical_list: D000097:Acetonitriles; D004202:Disinfectants; D006843:Hydrocarbons, Chlorinated; D022882:Trihalomethanes; D014874:Water Pollutants, Chemical; D002697:Chloral Hydrate; C100187:chloropicrin; D019342:Acetic Acid