Variation in assimilable organic carbon formation during chlorination of Microcystis aeruginosa extracellular organic matter solutions  

作　　者：Xingbin Sun Ting Yuan Huishan Ni Yanpeng Li Yang Hu 

机构地区：[1]Department of Environmental Science, Northeast Forestry University

出　　处：《Journal of Environmental Sciences》2016年第7期1-6,共6页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 503780262);the Supporting Certificate of China Postdoctoral Science Foundation (No. 20070420882);the National Natural Science Foundation of Heilongjiang Province of China (No. E200812)

摘　　要：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 4 mg/L, combined with a coagulant dose of 40 mg/L at 20°C over a reaction time of 12 hr, produced the minimum AOC.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 4 mg/L, combined with a coagulant dose of 40 mg/L at 20°C over a reaction time of 12 hr, produced the minimum AOC.

关 键 词：Microcystis aeruginosa Chlorination Assimilable organic carbon（AOC） 

分 类 号：TU991.2[建筑科学—市政工程] X524[环境科学与工程—环境工程]