西辽河平原浅层地下水中“三氮”分布特征及健康风险评价  

DISTRIBUTION OF NITROGEN IN THE SHALLOW GROUNDWATER OF WEST LIAOHE RIVER PLAIN AND HEALTH RISK ASSESSMENT

作　　者：李丽君[1] 李旭光[1] LI Li-jun;LI Xu-guang(Shenyang Centre of China Geological Survey,Shenyang 110032,China)

机构地区：[1]中国地质调查局沈阳地质调查中心,辽宁沈阳110034

出　　处：《地质与资源》2024年第1期90-97,共8页Geology and Resources

基　　金：中国地质调查局地质调查项目“西辽河平原地下水污染调查评价”(121201220980).

摘　　要：通过测试地下水样品中“三氮”含量,采用非致癌风险评价模型进行健康风险评价.结果表明,与《地下水质量标准》(GB14848-2017)限值对比,硝酸盐氮超标率8%,主要分布在研究区东南部及西南部区域;氨氮超标率10%,主要分布在中部及南部区域.地下水中Ⅰ、Ⅱ、Ⅲ类水质占比83%;Ⅳ及Ⅴ类水水质占比17%.地下水样品中“三氮”总非致癌风险指数及总致癌性风险指数均低于美国环境保护署推荐的健康风险评价标准.整体上研究区“三氮”污染程度相对较轻,“三氮”污染区域主要分布于人类活动密集地区.健康风险评价可为地区地下水中“三氮”污染监控和治理提供技术参考.In this study,the contents of nitrogen as NH4+,NO2-and NO3-in groundwater samples of West Liaohe River Plain are tested to assess health risk with non-carcinogenic risk model.The results show,compared with the limiting value of Groundwater Quality Standard(GB14848-2017),the exceeding rate of nitrate nitrogen is 8%,mainly distributed in the southeast and southwest of the study area.The exceeding rate of ammonia nitrogen is 10%,mainly distributed in the center and south of the area.The water quality of Class I,II and III accounts for 83%,and Class IV and V for 17%of the total groundwater.The total non-carcinogenic risk index and total carcinogenic risk index of nitrogen in groundwater samples are both lower than the health risk assessment standard recommended by the United States Environmental Protection Agency.On the whole,the pollution degree of nitrogen in the study area is relatively light,and the nitrogen pollution is mainly distributed in the human activity concentrated area.The health risk assessment can provide a technical reference for monitoring and control of nitrogen pollution in groundwater of the area.

关 键 词：地下水 三氮 健康风险评价 西辽河平原 

分 类 号：P641.3[天文地球—地质矿产勘探]