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6968950 
Journal Article 
Identification of nitrosamine precursors from urban drainage during storm events: A case study in southern China 
Bei, Er; Chen, C; Liao, X; Meng, X; Li, S; Wang, Jun; Sheng, D; Chao, M; Chen, Z; Zhang, X; , 
2016 
Yes 
Chemosphere
ISSN: 0045-6535
EISSN: 1879-1298 
160 
323-331 
English 
27393968 
WOS:000381172000039 
The drinking water sources of many cities in southern China are frequently contaminated by upstream urban drainage during storm events, which brings high concentrations of N-nitrosamine (NA) precursors and poses a threat to the safety of drinking water. We conducted two sampling campaigns during the heavy rain season in 2015 in one representative city in southern China. We detected that the concentration of N-nitrosodimethylamine formation potential (NDMA FP) in urban drainage during two storm events was 80-115 ng/L and the total formation potential concentration of nine nitrosamines (TNA(9) FP) was 145 -165 ng/L. To address the deteriorated water quality, 30 mg/L of powdered activated carbon (PAC) was fed into the water intake. PAC adsorption alone could remove 52% of NDMA FP and 52% of TNA FP, while the subsequent conventional process only removed 8% of TNA FP. We isolated six chemicals (N,N-benzyl-dimethylamine, 5-[(dimethylamino)methyl]1-2-furanmethanol, N,N-dimethyl-3-aminophenol, N,N-dimethylethylamine, Ziram, and N,N-dimethylaniline) and confirmed them to be NA precursors. Among these NA precursors, Ziram was identified for the first time as a NA precursor that is formed via chloramination; its molar yield for NDMA was 6.73 +/- 0.40%. (C) 2016 Elsevier Ltd. All rights reserved. 
Nitrosamines; Precursor; Disinfection by-products; Storm; Drainage; Powdered activated carbon