Influencing factors of disinfection byproducts formation during chloramination of Cyclops metabolite solutions  

作　　者：Xingbin Sun Lei Sun Ying Lu Jing Zhang Kejing Wang 

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

出　　处：《Journal of Environmental Sciences》2014年第3期575-580,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：Effects of reaction time, chlorine dosage, pH and temperature on the formation of disinfection byproducts （DBPs）, were investigated during the chloramination of Cyclops metabolite solutions. The results showed that some species of DBPs like trichloromethane （TCM）, dichloroacetic acid （DCAA） and trichloroacetic acid （TCAA） could accumulate to their respective stable values with a progressive elevation in reaction time and monochloramine concentration. And 1,1,1-2-trichloropropanone （1,1,1- TCP） content decreased correspondingly with a continuous increase of reaction time. The amounts of chloral hydrate （CH）, chloropicrin （TCNM）, 1,1,1-TCP and DCAA firstly increased and then decreased with increasing monochloramine doses. Higher temperature resulted in a decrease of CH, dichloroacetonitrile （DCAN）, 1,1-dichloropropanone （1,1-DCP）, 1,1,1-TCP, DCAA and TCAA concentration, pH affected the formation of the different DBPs distinctly. TCM accumulateded with the increase of pH under 9, and DCAA, TCAA, CH and 1,1-DCP decreased continuously with increasing pH from 5 to 10, and other DBPs had the maximum concentrations at pH 6-7.Effects of reaction time, chlorine dosage, pH and temperature on the formation of disinfection byproducts （DBPs）, were investigated during the chloramination of Cyclops metabolite solutions. The results showed that some species of DBPs like trichloromethane （TCM）, dichloroacetic acid （DCAA） and trichloroacetic acid （TCAA） could accumulate to their respective stable values with a progressive elevation in reaction time and monochloramine concentration. And 1,1,1-2-trichloropropanone （1,1,1- TCP） content decreased correspondingly with a continuous increase of reaction time. The amounts of chloral hydrate （CH）, chloropicrin （TCNM）, 1,1,1-TCP and DCAA firstly increased and then decreased with increasing monochloramine doses. Higher temperature resulted in a decrease of CH, dichloroacetonitrile （DCAN）, 1,1-dichloropropanone （1,1-DCP）, 1,1,1-TCP, DCAA and TCAA concentration, pH affected the formation of the different DBPs distinctly. TCM accumulateded with the increase of pH under 9, and DCAA, TCAA, CH and 1,1-DCP decreased continuously with increasing pH from 5 to 10, and other DBPs had the maximum concentrations at pH 6-7.

关 键 词：chloramination Cyclops metabolite solutions DBPs 

分 类 号：X171[环境科学与工程—环境科学]