title: Effects of chlorination operating conditions on trihalomethane formation potential in polyaluminum chloride-polymer coagulated effluent.
abstract: In this study, coagulation performance of polyaluminum chloride (PAC) and PAC-lignin acrylamide (PAC+LAM) in reservoir water treatment was contrastively analyzed. Effects of operating conditions including chlorine dose, contact time and pH on the formation potential of trihalomethanes (THMs) during chlorination in coagulated effluent were also investigated. Comparing with PAC, PAC+LAM achieved higher efficiency in the removal of THMs precursors. TTHM yield in unfiltered water samples (UW) was greater than that of filtered water (FW) due to the residual dissolved organic matter (DOM) in the suspended particles or micro flocs. Meanwhile, operating conditions during chlorination had a significant influence on THMs formation potential. With chlorine dose rising, mass ratio of CHCl3 to TTHM increased, whereas that of CHBr2Cl decreased due to higher Cl2/Br(-) molar ratio. TTHM and CHCl3 levels rose with the increase of pH. Under a given chlorination condition, there was a minor effect of contact time on THM speciation.
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, Shandong, People's Republic of China.
authors.forename: Ruihua
authors.initials: R
authors.lastname: Li
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, Shandong, People's Republic of China. Electronic address: baoyugao_sdu@aliyun.com.
authors.forename: Baoyu
authors.initials: B
authors.lastname: Gao
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, Shandong, People's Republic of China.
authors.forename: Defang
authors.initials: D
authors.lastname: Ma
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, Shandong, People's Republic of China.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Rong
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, Shandong, People's Republic of China.
authors.forename: Shenglei
authors.initials: S
authors.lastname: Sun
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, Shandong, People's Republic of China.
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, Shandong, People's Republic of China.
authors.forename: Qinyan
authors.initials: Q
authors.lastname: Yue
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, Shandong, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000178:Acrylamides / Q000737:chemistry*; D000536:Aluminum Hydroxide / Q000737:chemistry*; D002713:Chlorine / Q000737:chemistry*; D005427:Flocculation; D054879:Halogenation; D006863:Hydrogen-Ion Concentration; D008031:Lignin / Q000737:chemistry*; D022882:Trihalomethanes / Q000737:chemistry*; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D000178:Acrylamides; D000536:Aluminum Hydroxide; D002713:Chlorine; D008031:Lignin; D022882:Trihalomethanes; D062065:Wastewater; D014874:Water Pollutants, Chemical; C016213:aluminum oxychloride
keywords: Chlorination; Coagulation performance; Dual-coagulant; Operating conditions; Trihalomethanes