دورية أكاديمية
[Occurrence and Risk Assessment of N -nitrosamines and Their Precursors in Qingjiang River Basin].
العنوان: | [Occurrence and Risk Assessment of N -nitrosamines and Their Precursors in Qingjiang River Basin]. |
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المؤلفون: | Li MX; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China., Chen YJ; School of Environmental Studies, China University of Geosciences, Wuhan 430074, China., Chen WW; College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China., Huang HF; State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510535, China., Ding Y; Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Sichuan Normal University, Chengdu 610066, China., Xing XL; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China., Lu YQ; College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China., Qi SH; 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. |
المصدر: | Huan jing ke xue= Huanjing kexue [Huan Jing Ke Xue] 2024 Jul 08; Vol. 45 (7), pp. 3930-3940. |
نوع المنشور: | Journal Article |
اللغة: | Chinese |
بيانات الدورية: | Publisher: Ke xue zhu ban she Country of Publication: China NLM ID: 8405344 Publication Model: Print Cited Medium: Print ISSN: 0250-3301 (Print) Linking ISSN: 02503301 NLM ISO Abbreviation: Huan Jing Ke Xue Subsets: MEDLINE |
أسماء مطبوعة: | Original Publication: Beijing : Ke xue zhu ban she, |
مواضيع طبية MeSH: | Nitrosamines*/analysis , Water Pollution, Chemical*/statistics & numerical data , Water Pollutants, Chemical*/analysis , Environmental Monitoring*, Risk Assessment ; China ; Environmental Exposure/statistics & numerical data ; Drinking Water/analysis ; Rivers |
مستخلص: | N -nitrosamines are a type of nitrogen-containing organic pollutant with high carcinogenicity and mutagenicity. In the main drinking water sources of small and medium-sized towns in China, the contamination levels of N -nitrosamines remain unclear. In addition, there is still lack of research on the concentration of N -nitrosamines and their precursors in tributary rivers. In this study, eight N -nitrosamines and their formation potentials (FPs) were investigated in the Qingjiang River, which is a primary tributary of the Yangtze River. The sewage discharge sites were also monitored, and the environmental influencing factors, carcinogenic and ecological risks caused by N -nitrosamines, and their precursors were evaluated. The results showed that six N -nitrosamines were detected in water samples of the Qingjiang River, among which NDMA [(10 ±15) ng·L -1 ], NDEA [(9.3 ±9.3) ng·L -1 ], and NDBA [(14 ±7.8) ng·L -1 ] were the dominant N -nitrosamines, whereas seven N -nitrosamines were detected in chloraminated water samples, among which NDMA-FP [(46 ±21) ng·L -1 ], NDEA-FP [(26 ±8.3) ng·L -1 ], and NDBA-FP [(22 ±13) ng·L -1 ] were the dominant N -nitrosamine FPs. The concentrations of N -nitrosamines in the middle reaches of the Qingjiang River were higher than those in the upper and lower reaches. Furthermore, the concentrations of N -nitrosamines in the sample sites of sewage discharge and tributaries were significantly higher than those in other sampling sites. The monitoring results at the direct sewage discharge points indicated that the main source of N -nitrosamines in river water was the sewage carrying N -nitrosamines and their precursors. In addition, the concentrations of the three dominant N -nitrosamines including NDMA, NDBA, and NDEA were positively correlated with each other, mainly because of their similar sewage sources. The average carcinogenic risk to residents due to N -nitrosamine in drinking water sources was 2.4×10 -5 , indicating a potential carcinogenic risk. Moreover, due to the high concentrations of N -nitrosamine formation potentials in the Qingjiang River, the carcinogenic risk of drinking water may be even higher. The ecological risk assessment showed that the ecological risk quotient values of N -nitrosamines in the Qingjiang River watershed were lower than 0.002, which was negligible. |
فهرسة مساهمة: | Keywords: N-nitrosamines; Qingjiang River Basin; carcinogenic risks; ecological risks; formation potential(FP) |
المشرفين على المادة: | 0 (Nitrosamines) 0 (Water Pollutants, Chemical) 0 (Drinking Water) |
تواريخ الأحداث: | Date Created: 20240718 Date Completed: 20240719 Latest Revision: 20240719 |
رمز التحديث: | 20240719 |
DOI: | 10.13227/j.hjkx.202306220 |
PMID: | 39022941 |
قاعدة البيانات: | MEDLINE |
تدمد: | 0250-3301 |
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DOI: | 10.13227/j.hjkx.202306220 |