泰安市城区地下水化学特征及其成因分析  

Hydrochemical Characteristics and Formation Mechanism of Groundwater in Urban District of Tai’an

作　　者：孟令华 宁云 马明永 朱礼敏 王磊 崔庆岗 MENG Linghua;NING Yun;MA Mingyong;ZHU Limin;WANG Lei;CUI Qinggang(Shandong Geological Prospecting Institute of China Chemical Geology and Mine Bureau,Tai’an 271000,China;Tai’an Land Space Ecological Restoration Center,Tai’an 271000,China;Shandong Provincial Research Institute of Coal Geology Planning and Exploration,Jinan 250104,China;Tai’an Bureau of Natural Resources and Planning,Tai’an 271000,China)

机构地区：[1]中化地质矿山总局山东地质勘查院,山东泰安271000 [2]泰安市国土空间生态修复中心,山东泰安271000 [3]山东省煤田地质规划勘察研究院,山东济南250104 [4]泰安市自然资源和规划局,山东泰安271000

出　　处：《环境科学与技术》2025年第3期134-143,共10页Environmental Science & Technology

基　　金：山东省泰安市财政项目(SDGP370900202002000094,SDGP370900202102000047)。

摘　　要：泰安市城区地下水资源较丰富,是重要的供水水源地。为研究泰安市城区地下水化学特征及控制因素,该文系统采集不同类型地下水样品112件,运用数理统计、Piper三线图、离子相关性分析、Gibbs图、离子比值等方法对样品测试结果进行分析研究。结果表明:孔隙水、岩溶水和基岩裂隙水具有相似的水化学组成特征,阳离子均以Ca^(2+)、Na^(+)为主,阴离子均以HCO_(3)^(-)、SO_(4)^(2-)为主;地下水中TDS平均浓度为592.64~921.83 mg/L,以淡水为主;NO_(3)^(-)平均浓度为20.57~31.88 mg/L,存在较严重的硝酸盐氮污染;地下水化学类型复杂多样,但都以HCO_(3)·SO_(4)-Ca型为主。地下水化学特征受岩石风化溶滤作用、阳离子交替吸附作用和人类活动的共同影响,水化学组分主要来源于碳酸和硫酸参与的碳酸盐岩和硅酸盐岩矿物风化溶解,岩溶地下水碳酸盐岩风化较明显,孔隙水和基岩裂隙水硅酸盐岩风化较明显。不同类型地下水中同时存在正向和反向阳离子交换作用;同时水化学组分受农业生产活动和城市生活污水的排放等人为因素的影响较明显。研究成果对泰安城区地下水资源合理开发利用及保护具有指导意义。The urban area of Tai’an City has abundant groundwater resources and is an important source of groundwater supply.In order to study the hydrochemical characteristics and control factors of groundwater in urban district of Tai’an,112 samples of different types of groundwater were collected systematically,and the sample test results were analyzed and studied by using mathematical statistics,Piper three line diagram,ion correlation analysis,Gibbs diagram,ion ratio and oth⁃er methods.The results show that pore water,karst water,and bedrock fissure water have similar hydrochemical composi⁃tion characteristics.Cations are mainly Ca^(2+)and Na^(+),while anions are mainly HCO_(3)^(-)and SO_(4)^(2-).The average concentration of TDS in groundwater is 592.64~921.83 mg/L,with freshwater being the main source of groundwater.The average con⁃centration of NO_(3)^(-)is 20.57~31.88 mg/L,indicating severe nitrate nitrogen pollution.The hydrochemical types of groundwa⁃ter are complex and diverse,but they are mainly HCO_(3)·SO_(4)-Ca type.The hydrochemical characteristics of groundwater are jointly affected by rock weathering,leaching,cation alternating adsorption and human activities.The hydrochemical Environmental Science&Technology components mainly come from the weathering and dissolution of carbonate and silicate rock minerals with the participation of carbonic acid and sulfuric acid.The weathering of carbonate rock in karst groundwater is more pronounced,while the weathering of silicate rock in pore water and bedrock fissure water is more pronounced.There are both positive and negative ion exchange interactions in different types of groundwater.At the same time,the chemical composition of water is more significantly influenced by human factors such as agricultural production activities and urban sewage discharge.The re⁃search results have guiding significance for the rational development,utilization,and protection of groundwater resources in Tai’an urban area.

关 键 词：地下水 水化学特征 成因机制 泰安市 

分 类 号：X523[环境科学与工程—环境工程]