Monthly survey of N-nitrosamine yield in a conventional water treatment plant in North China  

作　　者：Chengkun Wang Shuming Liu Jun Wang Xiaojian Zhang Chao Chen 

机构地区：[1]School of Environment,Tsinghua University [2]State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC)

出　　处：《Journal of Environmental Sciences》2015年第12期142-149,共8页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.51290284 and 21477059);the Tsinghua University Initiative Scientific Research Program (No.20131089247)

摘　　要：A sampling campaign was conducted monthly to investigate the occurrence of N-nitrosamines at a conventional water treatment plant in one city in North China.The yield of N-nitrosamines in the treated water indicated precursors changed greatly after the source water switching.Average concentrations of N-nitrosodimethylamine（NDMA）,N-nitrosomorpholine（NMOR）,and N-nitrosopyrrolidine（NPYR） in the finished water were6.9,3.3,and 3.1 ng/L,respectively,from June to October when the Luan River water was used as source water,while those of NDMA,N-nitrosomethylethylamine（NMEA）,and NPYR in the finished water were 10.1,4.9,and 4.7 ng/L,respectively,from November to next April when the Yellow River was used.NDMA concentration in the finished water was frequently over the 10 ng/L,i.e.,the notification level of California,USA,which indicated a considerable threat to public health.Weak correlations were observed between N-nitrosamine yield and typical water quality parameters except for the dissolved organic nitrogen.A sampling campaign was conducted monthly to investigate the occurrence of N-nitrosamines at a conventional water treatment plant in one city in North China.The yield of N-nitrosamines in the treated water indicated precursors changed greatly after the source water switching.Average concentrations of N-nitrosodimethylamine（NDMA）,N-nitrosomorpholine（NMOR）,and N-nitrosopyrrolidine（NPYR） in the finished water were6.9,3.3,and 3.1 ng/L,respectively,from June to October when the Luan River water was used as source water,while those of NDMA,N-nitrosomethylethylamine（NMEA）,and NPYR in the finished water were 10.1,4.9,and 4.7 ng/L,respectively,from November to next April when the Yellow River was used.NDMA concentration in the finished water was frequently over the 10 ng/L,i.e.,the notification level of California,USA,which indicated a considerable threat to public health.Weak correlations were observed between N-nitrosamine yield and typical water quality parameters except for the dissolved organic nitrogen.

关 键 词：N-NITROSAMINES Precursors Fluorescence excitation-emission matrix Dissolved organic nitrogen Molecule weight Correlation 

分 类 号：X703[环境科学与工程—环境工程]