Hydrochemistry, quality and potential health risk appraisal of nitrate enriched groundwater in the Nanchong area, southwestern China
| Autor: | Yunhui Zhang, Qiuming Pei, Yongsheng Dai, Ying Wang, Xun Huang, Yong Xiao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Adult
Male Irrigation China Environmental Engineering 010504 meteorology & atmospheric sciences Population 010501 environmental sciences engineering.material 01 natural sciences Toxicology chemistry.chemical_compound Nitrate Water Quality Environmental Chemistry Health Status Indicators Humans education Child Waste Management and Disposal Groundwater 0105 earth and related environmental sciences education.field_of_study Box plot Nitrates business.industry Infant Pollution chemistry Agriculture engineering Environmental science Female Fertilizer Water quality business Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | The Science of the total environment. 784 |
| ISSN: | 1879-1026 |
| Popis: | Assessments for groundwater quality and potential health risk are significant for better utilization and exploitation. In the present study, seventy groundwater samples were collected from domestic tube wells and public water-supply wells in the Nanchong area, southwestern China. The integration of statistical analysis, ion correlation, geomodelling analysis, entropy water quality index and health risks assessment were compiled in this study. Statistical analysis indicated the cations followed the concentration order as Ca2+ > Na+ > Mg2+ > K+, while anions' concentrations were HCO3- > SO42- > Cl- > NO3- > F- based on Box and Whisker plot. Piper triangle diagram proposed the hydrochemical type was characterized as Ca-HCO3. Correlations of ions and geomodelling revealed the concentrations of major ions were mainly determined by calcite dissolution and ion exchange process and NO3- concentrations were controlled by agriculture activities. Entropy water quality index computation demonstrated that 96% of groundwater samples possessed the EWQI values of 29-95, and thus were suitable for drinking purpose. The HITotal values for 66% groundwater samples exceeded the acceptable limit for non-carcinogenic risk (HI =1) for infants, followed by 41% for children, 37% for adult males, and 30% for adult females. The non-carcinogenic human health risk of different population groups followed the order of infants > children > adult males > adult females. In future, targeted measures for human health risks of NO3- will focus on the improvements for agricultural activities, including reducing the use of nitrogenous fertilizer, changing irrigation pattern, etc. Our study provides the vital knowledge for groundwater management in the Nanchong and development of the Cheng -Yu Economic Circle. |
| Databáze: | OpenAIRE |
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