西北典型冲积平原水化学特征、地下水硝酸盐来源及潜在健康风险

IF 3 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Physics and Chemistry of the Earth Pub Date : 2025-03-12 DOI:10.1016/j.pce.2025.103903

Hao Liang , Peiyue Li , Vetrimurugan Elumalai , Yan Tian , Xiaomei Kou

{"title":"西北典型冲积平原水化学特征、地下水硝酸盐来源及潜在健康风险","authors":"Hao Liang , Peiyue Li , Vetrimurugan Elumalai , Yan Tian , Xiaomei Kou","doi":"10.1016/j.pce.2025.103903","DOIUrl":null,"url":null,"abstract":"<div><div>Due to anthropogenic pressures and the unpredictable impacts of climate change, groundwater quality issue has emerged as a critical concern. This study was carried out to investigate the evolving geochemical profile, identify the nitrate sources and transformation mechanisms, and assess the associated health hazards of phreatic groundwater in the Hua District, China. To achieve this goal, 65 and 37 phreatic water samples were collected in in October 2018 and March 2023, respectively, and analyzed for main water quality parameters and stable isotopes (δ18O-H2O, δ2H-H2O, δ15N-NO3-, and δ18O-NO3-). Piper diagram and ionic ratios were used for understanding the hydrochemical types and its evolution, stable isotopes were employed for tracing nitrate source, and human health risk assessment was also conducted to quantify the human health risk caused by exposure to groundwater NO3−. The results showed that main ion composition of groundwater hydrochemistry is controlled by the rock weathering and dissolution of carbonates and sulfate minerals. The chemical types of groundwater present an evolution trend from SO4•Cl-Ca•Mg to HCO3-Ca•Mg. Severe nitrate pollution was detected particularly in the central and southern regions, with peak nitrate concentrations reaching 442 and 271 mg/L in 2018 and 2023, respectively. Nitrate sources include sewage, soil organic nitrogen, and fertilizers. A shift from single (M&S) to multiple nitrate sources in groundwater was observed, with nitrification as the primary transformation process. The non-carcinogenic risks for children and adults declined from 0.245–3.455 to 0.039–2.586 and from 0.236–2.392 to 0.031–1.469, respectively, from 2018 to 2023. Additionally, these risky regions are shifting northward. Hence, individuals in the north-central part should heighten their vigilance towards groundwater quality to reduce the threats of nitrate pollution to human health.</div></div>","PeriodicalId":54616,"journal":{"name":"Physics and Chemistry of the Earth","volume":"139 ","pages":"Article 103903"},"PeriodicalIF":3.0000,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hydrochemical characteristics, groundwater nitrate sources and potential health risks in a typical alluvial plain of northwest China\",\"authors\":\"Hao Liang , Peiyue Li , Vetrimurugan Elumalai , Yan Tian , Xiaomei Kou\",\"doi\":\"10.1016/j.pce.2025.103903\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Due to anthropogenic pressures and the unpredictable impacts of climate change, groundwater quality issue has emerged as a critical concern. This study was carried out to investigate the evolving geochemical profile, identify the nitrate sources and transformation mechanisms, and assess the associated health hazards of phreatic groundwater in the Hua District, China. To achieve this goal, 65 and 37 phreatic water samples were collected in in October 2018 and March 2023, respectively, and analyzed for main water quality parameters and stable isotopes (δ18O-H2O, δ2H-H2O, δ15N-NO3-, and δ18O-NO3-). Piper diagram and ionic ratios were used for understanding the hydrochemical types and its evolution, stable isotopes were employed for tracing nitrate source, and human health risk assessment was also conducted to quantify the human health risk caused by exposure to groundwater NO3−. The results showed that main ion composition of groundwater hydrochemistry is controlled by the rock weathering and dissolution of carbonates and sulfate minerals. The chemical types of groundwater present an evolution trend from SO4•Cl-Ca•Mg to HCO3-Ca•Mg. Severe nitrate pollution was detected particularly in the central and southern regions, with peak nitrate concentrations reaching 442 and 271 mg/L in 2018 and 2023, respectively. Nitrate sources include sewage, soil organic nitrogen, and fertilizers. A shift from single (M&S) to multiple nitrate sources in groundwater was observed, with nitrification as the primary transformation process. The non-carcinogenic risks for children and adults declined from 0.245–3.455 to 0.039–2.586 and from 0.236–2.392 to 0.031–1.469, respectively, from 2018 to 2023. Additionally, these risky regions are shifting northward. Hence, individuals in the north-central part should heighten their vigilance towards groundwater quality to reduce the threats of nitrate pollution to human health.</div></div>\",\"PeriodicalId\":54616,\"journal\":{\"name\":\"Physics and Chemistry of the Earth\",\"volume\":\"139 \",\"pages\":\"Article 103903\"},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2025-03-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physics and Chemistry of the Earth\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1474706525000531\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics and Chemistry of the Earth","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1474706525000531","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

由于人为压力和不可预测的气候变化影响，地下水质量问题已成为人们关注的焦点。本研究旨在探讨华区潜水地下水中硝酸盐的地球化学特征、来源及转化机制，并对其健康危害进行评价。为实现这一目标，分别于2018年10月和2023年3月采集了65份和37份潜水水样，分析了主要水质参数和稳定同位素（δ18O-H2O、δ2H-H2O、δ15N-NO3-和δ18O-NO3-）。利用Piper图和离子比了解水体化学类型及其演变，利用稳定同位素追踪硝酸盐来源，并进行人体健康风险评估，量化地下水NO3−暴露对人体健康的风险。结果表明，地下水水化学主要离子组成受岩石风化作用和碳酸盐、硫酸盐矿物溶蚀作用的控制。地下水化学类型呈现由SO4•Cl-Ca•Mg向HCO3-Ca•Mg的演化趋势。硝酸盐污染尤其严重的是中部和南部地区，2018年和2023年硝酸盐浓度峰值分别达到442和271毫克/升。硝酸盐的来源包括污水、土壤有机氮和肥料。观察到地下水中硝酸盐从单一（M&；S）到多种来源的转变，硝化作用是主要的转变过程。从2018年到2023年，儿童和成人的非致癌风险分别从0.245-3.455下降到0.039-2.586，从0.236-2.392下降到0.031-1.469。此外，这些危险地区正在向北转移。因此，中北部地区个人应提高对地下水水质的警惕，以减少硝酸盐污染对人体健康的威胁。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Hydrochemical characteristics, groundwater nitrate sources and potential health risks in a typical alluvial plain of northwest China

Due to anthropogenic pressures and the unpredictable impacts of climate change, groundwater quality issue has emerged as a critical concern. This study was carried out to investigate the evolving geochemical profile, identify the nitrate sources and transformation mechanisms, and assess the associated health hazards of phreatic groundwater in the Hua District, China. To achieve this goal, 65 and 37 phreatic water samples were collected in in October 2018 and March 2023, respectively, and analyzed for main water quality parameters and stable isotopes (δ¹⁸O-H₂O, δ²H-H₂O, δ¹⁵N-NO₃^-, and δ¹⁸O-NO₃^-). Piper diagram and ionic ratios were used for understanding the hydrochemical types and its evolution, stable isotopes were employed for tracing nitrate source, and human health risk assessment was also conducted to quantify the human health risk caused by exposure to groundwater NO₃⁻. The results showed that main ion composition of groundwater hydrochemistry is controlled by the rock weathering and dissolution of carbonates and sulfate minerals. The chemical types of groundwater present an evolution trend from SO₄•Cl-Ca•Mg to HCO₃-Ca•Mg. Severe nitrate pollution was detected particularly in the central and southern regions, with peak nitrate concentrations reaching 442 and 271 mg/L in 2018 and 2023, respectively. Nitrate sources include sewage, soil organic nitrogen, and fertilizers. A shift from single (M&S) to multiple nitrate sources in groundwater was observed, with nitrification as the primary transformation process. The non-carcinogenic risks for children and adults declined from 0.245–3.455 to 0.039–2.586 and from 0.236–2.392 to 0.031–1.469, respectively, from 2018 to 2023. Additionally, these risky regions are shifting northward. Hence, individuals in the north-central part should heighten their vigilance towards groundwater quality to reduce the threats of nitrate pollution to human health.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Physics and Chemistry of the Earth 地学-地球科学综合

CiteScore

5.40

自引率

2.70%

发文量

176

审稿时长

31.6 weeks

期刊介绍： Physics and Chemistry of the Earth is an international interdisciplinary journal for the rapid publication of collections of refereed communications in separate thematic issues, either stemming from scientific meetings, or, especially compiled for the occasion. There is no restriction on the length of articles published in the journal. Physics and Chemistry of the Earth incorporates the separate Parts A, B and C which existed until the end of 2001. Please note: the Editors are unable to consider submissions that are not invited or linked to a thematic issue. Please do not submit unsolicited papers. The journal covers the following subject areas: -Solid Earth and Geodesy: (geology, geochemistry, tectonophysics, seismology, volcanology, palaeomagnetism and rock magnetism, electromagnetism and potential fields, marine and environmental geosciences as well as geodesy). -Hydrology, Oceans and Atmosphere: (hydrology and water resources research, engineering and management, oceanography and oceanic chemistry, shelf, sea, lake and river sciences, meteorology and atmospheric sciences incl. chemistry as well as climatology and glaciology). -Solar-Terrestrial and Planetary Science: (solar, heliospheric and solar-planetary sciences, geology, geophysics and atmospheric sciences of planets, satellites and small bodies as well as cosmochemistry and exobiology).