The presence of mutagenic and carcinogenic nitrosamines in water is of great concern. In this study, seven nitrosamines including N-nitrosodimethylamine （NDMA）, N-nitrosodiethylamine （NDEA）, N-nitrosomethylethylam...The presence of mutagenic and carcinogenic nitrosamines in water is of great concern. In this study, seven nitrosamines including N-nitrosodimethylamine （NDMA）, N-nitrosodiethylamine （NDEA）, N-nitrosomethylethylamine （NMEA）, N-nitrosopyrrolidine （NPyr）, N-nitrosopiperidine （NPip）, N-nitrosodi-n-propylamine （NDPA）, and N-nitrosodi-n-butyl-amine （NDBA） were investigated in river water and ground water samples collected from 5 representative cities （Jilin, Songyuan, Harbin, Jiamusi and Tongjiang） along the Songhua River. The total concentrations of nitrosamines in ground water were n.d. （not detected） to 60.8 ng/L, NDMA was the most frequently detected nitrosamines in ground water, followed by NDEA and NPip. Relatively high detected frequency and concentrations of NDMA were also observed in river water samples, and the total nitrosamines＇ concentration at midstream is always higher than that at upstream and downstream. After 24 hr chlorination, concentration of NDMA, NDBA was obviously increased but NDEA was reduced. Furthermore, UV2s4 showed a better relationship with NDMA-FP rather than dissolved organic carbon （DOC）. NI-h-N. and TDN.展开更多
基金supported by the Natural Science Foundation of China (Nos. 51238001, 51508077)the Fundamental Research Funds for the Central Universities (No. 2412015KJ025)
文摘The presence of mutagenic and carcinogenic nitrosamines in water is of great concern. In this study, seven nitrosamines including N-nitrosodimethylamine （NDMA）, N-nitrosodiethylamine （NDEA）, N-nitrosomethylethylamine （NMEA）, N-nitrosopyrrolidine （NPyr）, N-nitrosopiperidine （NPip）, N-nitrosodi-n-propylamine （NDPA）, and N-nitrosodi-n-butyl-amine （NDBA） were investigated in river water and ground water samples collected from 5 representative cities （Jilin, Songyuan, Harbin, Jiamusi and Tongjiang） along the Songhua River. The total concentrations of nitrosamines in ground water were n.d. （not detected） to 60.8 ng/L, NDMA was the most frequently detected nitrosamines in ground water, followed by NDEA and NPip. Relatively high detected frequency and concentrations of NDMA were also observed in river water samples, and the total nitrosamines＇ concentration at midstream is always higher than that at upstream and downstream. After 24 hr chlorination, concentration of NDMA, NDBA was obviously increased but NDEA was reduced. Furthermore, UV2s4 showed a better relationship with NDMA-FP rather than dissolved organic carbon （DOC）. NI-h-N. and TDN.
