人类活动驱动下的高碘地下水成因机制——以福州市为例  

The mechanism of high iodine groundwater driven by human activities:a case study of Fuzhou City

作　　者：刘林 陈琦[4] 赵汝荣 周迅 姜月华[2,3] 叶永红 LIU Lin;CHEN Qi;ZHAO Rurong;ZHOU Xun;JIANG Yuehua;YE Yonghong(Chinese Academy of Geological Sciences,Beijing 100037,China;Nanjing Center,China Geological Survey,Nanjing 210016,Jiangsu,China;Key Laboratory of Watershed Eco-Geological Processes,Ministry of Natural Resources,Nanjing 210016,Jiangsu,China;Geological Environment Monitoring Center of Fujian Province,Fuzhou 350001,Fujian,China)

机构地区：[1]中国地质科学院,北京100037 [2]中国地质调查局南京地质调查中心,江苏南京210016 [3]自然资源部流域生态地质过程重点实验室,江苏南京210016 [4]福建省地质环境监测中心,福建福州350001

出　　处：《华东地质》2023年第4期457-466,共10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:DD20221756)”;“长江经济带地质资源环境综合评价(编号:DD20190260)”;“东南地区地下水污染调查与综合评价(编号:1212011121168)”;“长江流域下游水文地质与水资源调查监测(编号:DD20221756)”项目联合资助。

摘　　要：长期饮用高碘水会引起甲状腺功能障碍,威胁人体健康。文章以福州市富碘浅层地下水为研究对象,基于不同土地利用类型区的42组地下水样品,采用统计分析和离子比系数等方法,研究了地下水中碘的分布特征及高碘地下水成因机制。结果表明:福州市地下水中碘含量为0.0080~0.52 mg/L,平均值为0.10 mg/L,呈现出内陆低-沿海高、山地低-平原高、农村低-城市高的分布特征。高碘地下水样品占19.1%,主要分布在闽江沿岸主城区、福清东部及平潭等滨海地区。第四纪形成的冲海积沉积物是区内地下水中碘富集的天然物质基础,还原的地下水环境、较长的滞留时间是利于地下水中碘富集的自然条件。高碘地下水的空间分布与人口密度高的地区高度耦合,揭示了人类活动排放的高碘生活污水是该地区高碘地下水形成的重要驱动因素。Drinking high iodine water for a long time can cause thyroid dysfunction and pose a threat to human health.We selected high iodine groundwater in Fuzhou as the research object,and collected 42 groups of groundwater samples from different land use types.The spatial characteristics and genetic mechanisms of iodine in shallow groundwater were studied by using statistical analysis and ion ratio analysis.The results showed that the average content of iodine in local groundwater was 0.10 mg/L(0.0080~0.52 mg/L).The distribution characteristics of iodine were inland low-coastal high,mountain low-plain high,and rural low-urban high.High iodine groundwater samples accounted for 19.1%,and were predominantly distributed in the main urban areas along the Minjiang River,eastern Fuqing and Pingtan coastal areas.The Quaternary alluvial and marine sediments provide a natural material sources for iodine enrichment in groundwater.Moreover,the reduced groundwater environment and long retention time are natural conditions of iodine enrichment in groundwater.As the spatial distribution of high iodine groundwater is highly correlated with the areas of high population density,it is suggested that high iodine domestic sewage discharged from human activities plays a significant role in the formation mechanism of high iodine groundwater.

关 键 词：高碘地下水 成因机制 人类活动 福州市 

分 类 号：P641[天文地球—地质矿产勘探] X523[天文地球—地质学]