title: Evaluation of disinfection by-product formation potential (DBPFP) during chlorination of two algae species--Blue-green Microcystis aeruginosa and diatom Cyclotella meneghiniana.
abstract: Microcystis aeruginosa (blue-green alga) commonly blooms in summer and Cyclotella meneghiniana (diatom) outbreaks in fall in the reservoirs that serve as drinking water sources in Southeast China. Herein, an evaluation of disinfection by-product formation potential (DBPFP) from them during chlorination should be conducted. Five DBPs including trichloromethane (TCM), trichloronitromethane (TCNM), dichloroacetonitrile (DCAN), 1,1-dichloropropanone (1,1-DCP) and 1,1,1-trichloropropanone (1,1,1-TCP) were monitored. The formation potential of TCM and TCNM was enhanced with the increase of reaction time and chlorine dosage, whereas that of DCAN, 1,1-DCP and 1,1,1-TCP increased first and then fell with continuing reaction time. M. aeruginosa showed higher DBPFP than C. meneghiniana, the yield of DBPs varied with components of algal cells. The DBPFP order from components of M. aeruginosa was cell suspension (CS) ≈ intracellular organic matter (IOM) > extracellular organic matter (EOM) > cell debris (CD), which indicated that IOM was the main DBP precursors for M. aeruginosa. The yields of DBPs from components of C. meneghiniana were in the order of CS>IOM≈ CD ≈ EOM, suggesting that three components made similar contributions to the total DBP formation. The amount of IOM with higher DBPFP leaked from both algae species increased with the chlorine dosage, indicating that chlorine dosage should be considered carefully in the treatment of eutrophic water for less destroying of the cell integrity. Though fluorescence substances contained in both algae species varied significantly, the soluble microbial products (SMPs) and aromatic protein-like substances were the main cellular components that contributed to DBP formation for both algae.
authors.affiliation: Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China.
authors.forename: Xiaobin
authors.initials: X
authors.lastname: Liao
authors.affiliation: Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China.
authors.forename: Jinjin
authors.initials: J
authors.lastname: Liu
authors.affiliation: Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China.
authors.forename: Mingli
authors.initials: M
authors.lastname: Yang
authors.affiliation: Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China.
authors.forename: Hongfang
authors.initials: H
authors.lastname: Ma
authors.affiliation: Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China. Electronic address: yuanbl@hotmail.com.
authors.forename: Baoling
authors.initials: B
authors.lastname: Yuan
authors.affiliation: School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
authors.forename: Ching-Hua
authors.initials: CH
authors.lastname: Huang
mesh_terms: D000096:Acetone / Q000031:analogs & derivatives / Q000032:analysis; D002681:China; D002713:Chlorine / Q000032:analysis; D017377:Diatoms; D004202:Disinfectants / Q000032:analysis*; D004203:Disinfection; D060766:Drinking Water / Q000737:chemistry; D054879:Halogenation; D046931:Microcystis; D022882:Trihalomethanes / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D004202:Disinfectants; D060766:Drinking Water; D022882:Trihalomethanes; D014874:Water Pollutants, Chemical; D000096:Acetone; D002713:Chlorine; C051717:1,1-dichloroacetone; C058072:1,1,1-trichloroacetone
keywords: C. meneghiniana; Chlorination; Disinfection by-products; Extracellular organic matter; Intracellular organic matter; M. aeruginosa