CAJ | 학술논문

宁夏自治区西吉县地下水中硫酸盐（SO42-）含量普遍超标，为了查明地下水中SO42-的来源，对区内36件地下水样品的水化学组成、21件岩石样品的易溶盐组分和10件地下水样品硫同位素组成进行了测试分析。结果表明：SO42-是区内地下水中主要阴离子组分，在区域上具有北部低，中部和南部高的明显的分带性，并且沿着地下水流向SO42-含量逐渐升高；SO42-也是区内第三系地层中主要的易溶盐组分，以石膏和芒硝形式存在；区内地下水中SO42-主要来源于地层中石膏和芒硝（所占比例平均为83％），其次是地层中的硫化物（所占比例平均为17％）。
저하자치구서길현지하수중류산염（SO42-）함량보편초표，위료사명지하수중SO42-적래원，대구내36건지하수양품적수화학조성、21건암석양품적역용염조분화10건지하수양품류동위소조성진행료측시분석。결과표명：SO42-시구내지하수중주요음리자조분，재구역상구유북부저，중부화남부고적명현적분대성，병차연착지하수류향SO42-함량축점승고；SO42-야시구내제삼계지층중주요적역용염조분，이석고화망초형식존재；구내지하수중SO42-주요래원우지층중석고화망초（소점비례평균위83％），기차시지층중적류화물（소점비례평균위17％）。
The hydrochemical compositions of 36 groundwater samples ,the soluble salt components of 21 rock sam-ples and the sulfur isotope compositions of 10 groundwater samples were analyzed so as to identify the origin of SO42- in groundwater in Xiji County of Ningxia where the content of SO42- in groundwater was generally excessive .The results showed that SO42 - was the main component of anion in the study area ,and the concentration of sulfate in groundwater in-creased gradually from north to south along with the flow path of groundwater .The soluble components in Teritary strata were dominated by sulfate in the forms of gypsum and mirabilite .There were two sources of sulfate in groundwater :about 83% was originated from gypsum and mirabilite in rocks ,and the rest was from sulfide in aquifers .