淮河流域平原区高铁锰地下水环境健康风险评估  

Exposure risk of high Fe and Mn groundwater from Huaihe River Plain

作　　者：许乃政 陶小虎 龚建师[1,2] 檀梦皎 XU Naizheng;TAO Xiaohu;GONG Jianshi;TAN Mengjiao(Nanjing Center,China Geological Survey,Nanjing 210016,Jiangsu,China;Key Laboratory of Watershed Eco-Geological Processes,Ministry of Natural Resources,Nanjing 210016,Jiangsu,China)

机构地区：[1]中国地质调查局南京地质调查中心,江苏南京210016 [2]自然资源部流域生态地质过程重点实验室,江苏南京210016

出　　处：《华东地质》2023年第2期119-127,共9页East China Geology

基　　金：中国地质调查局“长江下游及淮河流域水文地质与水资源调查监测(编号:DD20230428)”项目资助。

摘　　要：基于近期获得的水文地球化学分析数据,应用指示克立格法开展了淮河流域平原区高铁、锰地下水环境健康风险评估,并分析了高铁、锰地下水的形成原因。结果表明:铁、锰是影响研究区地下水质量的主要化学组分,铁、锰在地下水中的空间分布上表现出明显的变异性。铁、锰超标概率峰值具有相似的空间分布格局,铁、锰高风险地区呈岛状分布,深层地下水的环境健康风险明显降低。含铁浅层地下水高风险地区面积为1257.15 km^(2),面积占比0.07%;含铁深层地下水高风险地区面积为476.93 km^(2),面积占比0.03%。含锰浅层地下水高风险地区面积为35883.16 km^(2),面积占比19.19%;含锰深层地下水高风险地区面积为1269.30 km^(2),面积占比0.07%。淮河流域高铁锰地下水是原生成因,铁、锰离子主要来源于含水层中含铁、锰矿物的还原性溶解。高铁锰地下水的风险评价结果,可为区域供水区划提供指导。Based on the analysis of hydro-geochemical data obtained recently,this study assessed exposure risk of high Fe and Mn groundwater from Huaihe River Plain in eastern China using Indicator Kriging method,as well as discussed its origin.The results showed that Fe and Mn were the main chemical substances affecting groundwater quality,indicating obvious spatial variability.The peak value of Fe and Mn risk probability were distributed similarly in spatial pattern.The high-risk areas of Fe and Mn presented an island distribution,and the hazard risk of deep groundwater were significantly reduced against the shallow counterpart.The high risk zone of Fe in shallow groundwater covers 1257.15 km^(2),accounting for 0.07%of the study area,and the counterpart in deep groundwater was 476.93 km^(2),accounting for 0.03%,respectively.The high risk zone of Mn in shallow groundwater covers 35883.16 km^(2),accounting for 19.19%,while its counterpart in deep groundwater was 1269.30 km^(2),accounting for 0.07%,respectively.The high Fe and Mn groundwater was of in-situ origin,and Fe and Mn were derived from geogenic iron and manganese minerals in aquifers by reductive dissolution.This paper carried out research on exposure risk of high Fe and Mn groundwater from Huaihe River Plain,which may provide guidance for the regionalization of drinking groundwater safety.

关 键 词：铁锰地下水 环境健康风险 指示克立格法 淮河平原 

分 类 号：X53[环境科学与工程—环境工程]