State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China.
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China.
Water Res. 2019 Nov 1;164:114896. doi: 10.1016/j.watres.2019.114896. Epub 2019 Jul 22.
N-nitrosamines in water have drawn significant concerns for the health of water consumers due to their carcinogenic properties. N-nitrosamines are formed during disinfection of wastewater as well as different industrial and agricultural processes. This study characterized the N-nitrosamines compositions in eleven different wastewaters in the Pearl River Delta (PRD) in Southeast China, and the spatial distributions and the abundances of N-nitrosamines in the Pearl River water were detected. The results indicated that five N-nitrosamines species, including N-nitrosodimethylamine (NDMA), N-nitrosodiethylamine (NDEA), N-nitrosopyrrolidine (NPYR), N-nitrosomorpholine (NMOR) and N-nitrosodibutylamine (NDBA) were found in the industrial wastewater samples in the PRD. Remarkably high concentrations of NDMA (up to 4000 ng/L) were found in the wastewaters from the textile printing and dyeing as well as the electroplating, whereas NDMA, NDEA and NMOR were detected in the domestic wastewaters at concentrations lower than 15 ng/L. Moreover, we found that certain treatment processes for the electroplating wastewater could form a significant amount of NDMA, NPYR and NMOR. Analyses of the Pearl River water samples showed occurrences of different N-nitrosamines species, including NDMA (5.7 ng/L), NDEA (1.7 ng/L), NPYR (2.2 ng/L), NMOR (2.2 ng/L) and NDBA (4.9 ng/L). The abundances of N-nitrosamines species varied spatially due to the inputs from the different sources. Thus, our study provides unique and valuable information for occurrences, abundances and source characteristics of N-nitrosamines in the PRD.
水中的亚硝胺因其致癌特性而引起了人们对饮用水消费者健康的极大关注。亚硝胺是在废水消毒以及不同的工业和农业过程中形成的。本研究对中国东南部珠江三角洲（PRD）的 11 种不同废水中的亚硝胺成分进行了特征描述，并检测了珠江水中亚硝胺的空间分布和丰度。结果表明，在 PRD 的工业废水中发现了五种亚硝胺，包括亚硝二甲胺（NDMA）、亚硝二乙胺（NDEA）、亚硝吡咯烷（NPYR）、亚硝吗啉（NMOR）和亚硝二丁胺（NDBA）。在纺织印花和电镀废水的废水中发现了高达 4000ng/L 的 NDMA 浓度，而在生活废水中，NDMA、NDEA 和 NMOR 的浓度低于 15ng/L。此外，我们发现某些电镀废水处理工艺会形成大量的 NDMA、NPYR 和 NMOR。对珠江水样的分析表明，存在不同的亚硝胺种类，包括 NDMA（5.7ng/L）、NDEA（1.7ng/L）、NPYR（2.2ng/L）、NMOR（2.2ng/L）和 NDBA（4.9ng/L）。由于不同来源的输入，亚硝胺种类的丰度在空间上有所变化。因此，本研究为 PRD 地区亚硝胺的存在、丰度和来源特征提供了独特而有价值的信息。
