雷州半岛地下水水质空间分布特征及铁、锰、pH超标的水文地球化学成因探析  

Spatial Distribution of Groundwater Quality and Hydrogeochemical Causes of Fe,Mn and pH Exceeding the National Drinking Water Standards in Leizhou Peninsula

作　　者：王亚 曹小芳 叶珊 周永章 张珂[1,3,4] 陈炳辉 沈文杰[1,3,4] 梁浩 曹英杰[2,3] 李增权 WANG Ya;CAO Xiaofang;YE Shan;ZHOU Yongzhang;ZHANG Ke;CHEN Binghui;SHEN Wenjie;LIANG Hao;CAO Yingjie;LI Zengquan(School of Earth Sciences and Engineering,Sun Yat-sen University,Guangzhou 510275,China;School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou 510275,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China;Guangdong Provincial Key Laboratory of Geological Processes and Mineral Resource Survey,Guangzhou 510275,China;Guangdong Ecological and Environmental Monitoring Center,Guangzhou 510380,China;Zhanjiang Ecological and Environmental Monitoring Center Station of Guangdong Province,Zhanjiang 524000,China)

机构地区：[1]中山大学地球科学与工程学院,广东广州510275 [2]中山大学环境科学与工程学院,广东广州510275 [3]南方海洋科学与工程广东省实验室(珠海),广东珠海519082 [4]广东省地质过程与矿产资源探查重点实验室,广东广州510275 [5]广东省生态环境监测中心,广东广州510380 [6]广东省湛江生态环境监测中心站,广东湛江524000

出　　处：《中国环境监测》2024年第1期183-197,共15页Environmental Monitoring in China

基　　金：广东省打好污染防治攻坚战专项(3397);广东省自然科学基金(2021A1515012514);国家基金中国以色列合作项目(41961144027);国家自然科学基金重点项目(U1911202);南方海洋科学与工程广东省实验室(珠海)创新团队建设项目(311021004);广东省重点研发项目(2020B1111370001)。

摘　　要：对广东省雷州半岛2009—2017年地下水环境质量调查项目涉及的102个钻孔的水化学数据进行分析,发现该区域地下水的铁(Fe)、锰(Mn)含量和pH普遍超标,导致当地地下水水质以Ⅳ~Ⅴ类居多,不适宜直接作为生活饮用水。其中,中层含水层的Fe、Mn超标最显著,且二者具有十分一致的水文地球化学行为特征,因此,该层是解析超标机理的关键层位。松散沉积含水层的Fe、Mn、pH超标问题比基岩裂隙溶隙含水层和交互含水层更突出。湛江组和北海组两个相邻松散岩类地层均含有丰富的铁锰质矿物或结核,应加强对这两个地层的地球化学分析,以进一步解析相关指标超标的地球化学机理。最后,就该区域地下水水质超标机制研究与水质管控提出了建议。Based on the analysis of the hydrochemical data of 102 boreholes obtained from the groundwater environmental quality surveys in Leizhou Peninsula of Guangdong Province from 2009 to 2017,it was found that the Fe and Mn content and pH of the groundwater in this area genenally exceeded the standard,resulting in the majority of classⅣ-Ⅴgrades in the classification for groundwater quality,which is not suitable to be directly used as drinking water.The highest levels of excessive Fe and Mn were found in the middle aquifer,where Fe and Mn exhibited consistent hydrogeochemical behaviour characteristics,indicating that it was the key layer for analyzing the mechanism of exceeding the limit.Compared with bedrock fissure aquifers and interacted aquifers,unconsolidated sedimentary aquifers had the most prominent problems of Fe,Mn and pH exceeding the national drinking water standards.The two adjacent unconsolidated sedimentary strata of Zhanjiang Formation and Beihai Formation were rich in ferric manganese minerals or nodules.The geochemical analysis for these two strata should be strengthened to further analyze the geochemical mechanism of the excess of the relevant indicators.Finally,suggestions on the study of the mechanism of groundwater quality exceeding the standard and groundwater quality control in this region were put forward.

关 键 词：地下水水质超标 环境地质 相关性分析 铁(Fe) 锰(Mn) pH 雷州半岛 

分 类 号：X824[环境科学与工程—环境工程] P592[天文地球—地球化学]