基于同位素和水化学的山区饮用水安全风险识别  

Risk Identification of Drinking Water Safety in Mountainous Areas by Isotopes and Hydrochemistry

作　　者：范丽丽[1] 王宗志[1] 沙海飞[1] 杜慧华 白莹 丁启 FAN Lili;WANG Zongzhi;SHA Haifei;DU Huihua;BAI ying;DING qi(Nanjing Hydraulic Research Institute,Nanjing,Jiangsu 210024,China)

机构地区：[1]南京水利科学研究院,江苏南京210024

出　　处：《环境监测管理与技术》2024年第6期58-62,共5页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学青年基金资助项目(52109027);国家重点研发计划基金资助项目(2023YFC3206604)。

摘　　要：以安徽岳西潜水流域为研究区,采集地表、地下、温泉水样,测定水源水质并分析引发健康问题的主要超标因子硝酸盐,利用同位素(N、H、O)和水化学方法解析研究区硝酸盐来源与转化过程,并采用稳定同位素混合模型(SIAR)定量分析各来源的贡献率。结果表明:化肥对硝酸盐贡献最大(占总量的68.7%),其次是大气降水(15.1%),畜禽粪便和污水的贡献率稍低(9.6%),土壤有机氮的贡献率最低(6.6%)。结合水化学与同位素示踪手段,精确溯源流域硝酸盐污染主要来源于化肥。Taking Yuexi Diving basin in Anhui as the study area,the water quality of surface water,groundwater and hot spring were determined.Nitrate,the main over-standard factor causing health problems was detected.The sources and transformation process of nitrate in the study area were analyzed by isotope(N,H,O)and hydrochemistry method,and the contribution rate of each source was quantitatively analyzed by stable isotope mixing model(SIAR).The results showed that fertilizer contributed the most to nitrate(accounting for 68.7%of the total),followed by atmospheric rainfall(15.1%),livestock manure and sewage contributed slightly low(9.6%),and organic nitrogen in soil contributed the least(6.6%).By means of hydrochemistry and isotope tracer,the main source of nitrate pollution in watershed was accurately traced.

关 键 词：同位素 硝酸盐 水化学 稳定同位素混合模型 山区饮用水 

分 类 号：X52[环境科学与工程—环境工程]