浅层地下水水化学特征及来源分析——以朱仙庄镇周边为例

Hydrochemical Characteristics and Source Analysis of the Shallow Groundwater—A Case Study around Zhuxianzhuang Town

摘要: 为揭示朱仙庄镇矿周边的浅层地下水水化学演化特征及常规离子来源，本研究共采集研究区20组浅层地下水样品。综合利用了描述性统计分析、Piper三线图、相关性分析、因子分析等方法，探讨了关于研究区常规离子组成特征、地下水水化学类型及其形成原因。结果表明，研究区pH值在7.80~8.90之间，为弱碱性；TDS均值为516.95 mg/L，属于淡水型；EC在272.00~1500.00 uS/cm，平均值为1051.40 uS/cm。HCO3−和Ca² 为研究区地下水的相对优势阴、阳离子。地下水类型以HCO₃-Ca、HCO₃-Ca-Na为主导。朱仙庄镇矿周边浅层地下水水岩作用主要包括硫酸盐岩矿物、硅酸盐岩矿物、碳酸盐岩矿物、岩盐矿物风化溶滤作用和阳离子交替吸附作用。

Abstract: In order to reveal the hydrochemical evolution characteristics and conventional ion sources of shallow groundwater around Zhuxianzhuang mine, 20 groups of shallow groundwater samples were collected in this study. The characteristics of conventional ion composition, groundwater hydrochemical types and their causes in the study area were discussed by means of descriptive statistical analysis, Piper three-line diagram, correlation analysis and factor analysis. The results show that the pH value of the study area is between 7.80 and 8.90, which is weakly alkaline; the mean value of TDS was 516.95 mg/L, belonging to freshwater type. EC was 272.00~1500.00 uS/cm, with an average of 1051.40 uS/cm.HCO3−and Ca² are the relative dominant anions and cations of groundwater in the study area. The groundwater type is dominated by HCO₃-Ca and HCO₃-Ca-Na. The water-rock interaction of shallow groundwater around Zhuxianzhuang Town Mine mainly includes sulfate rock minerals, silicate rock minerals, carbonate rock minerals, weathering and dissolution of rock salt minerals and cation alternating adsorption.