title: Variation in assimilable organic carbon formation during chlorination of Microcystis aeruginosa extracellular organic matter solutions.
abstract: This study investigated the chlorination of Microcystis aeruginosa extracellular organic matter (EOM) solutions under different conditions, to determine how the metabolites produced by these organisms affect water safety and the formation of assimilable organic carbon (AOC). The effects of chlorine dosages, coagulant dosage, reaction time and temperature on the formation of AOC were investigated during the disinfection of M.aeruginosa metabolite solutions. The concentration of AOC followed a decreasing and then increasing pattern with increasing temperature and reaction time. The concentration of AOC decreased and then increased with increasing chlorination dosage, followed by a slight decrease at the highest level of chlorination. However, the concentration of AOC decreased continuously with increasing coagulant dosage. The formation of AOC can be suppressed under appropriate conditions. In this study, chlorination at 4mg/L, combined with a coagulant dose of 40mg/L at 20°C over a reaction time of 12hr, produced the minimum AOC.
authors.affiliation: Department of Environmental Science, Northeast Forestry University, Harbin 150040, China. Electronic address: wenzeng1120@163.com.
authors.forename: Xingbin
authors.initials: X
authors.lastname: Sun
authors.affiliation: Department of Environmental Science, Northeast Forestry University, Harbin 150040, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Yuan
authors.affiliation: Department of Environmental Science, Northeast Forestry University, Harbin 150040, China.
authors.forename: Huishan
authors.initials: H
authors.lastname: Ni
authors.affiliation: Department of Environmental Science, Northeast Forestry University, Harbin 150040, China.
authors.forename: Yanpeng
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Environmental Science, Northeast Forestry University, Harbin 150040, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Hu
mesh_terms: D002244:Carbon / Q000032:analysis*; D002713:Chlorine; D004203:Disinfection / Q000379:methods*; D046931:Microcystis; D018508:Water Purification / Q000379:methods*
chemical_list: D002713:Chlorine; D002244:Carbon
keywords: Assimilable organic carbon (AOC); Chlorination; Microcystis aeruginosa