通辽科尔沁地区地下水水化学特征分析  

Geochemistry of Groundwater in Tongliao Horqin Area

作　　者：李旭光[1] 何海洋[1] 田辉[1] 代雅建[1] 朱巍[1] 孙岐发[1] LI Xuguang;HE Haiyang;TIAN Hui;DAI Yajian;ZHUWei;SUN Qifa(Shenyang Geological Survey Cente, China Geological Survey, Shenyang 110034, China)

机构地区：[1]中国地质调查局沈阳地质调查中心

出　　处：《灌溉排水学报》2019年第6期92-98,共7页Journal of Irrigation and Drainage

基　　金：中国地质调查局西辽河平原地下水污染调查评价项目(1212011220980)

摘　　要：【目的】查明通辽市科尔沁区地下水水化学特征。【方法】应用数学统计方法,分析了地下水化学各组分之间的响应关系、作用机制,并研究了地下水水化学成分的来源和形成过程。【结果】地下水化学组分在不同区域的量值相差较大,易受含水层介质、地形地貌、水文气象条件和人类活动等因素的影响。研究区内铁锰的超标率最高,超标率为75%以上,亚硝酸根、铅、铝次之,超标率在10%~20%之间,其余组分超标率较低。研究区内TDS的变化与主要超标离子的质量浓度变化趋势是一致的,主要原因为随着TDS质量浓度的升高,含水层中发生岩盐、石膏和白云石的溶解沉淀以及阳离子交替吸附作用。【结论】为保障通辽科尔沁地区饮用水安全,将地下水作为饮用水源需进行铁锰处理,并将亚硝酸根、铅、铝作为重点控制污染物。【Objective】This paper presents the results of the geochemical analysis of the groundwater in Horqin District of Tongliao City.【Method】Using measured data, we analyzed the relationship between chemical composition of the groundwater and the factors that affect biogeochemical processes in the groundwater.【Result】The concentration of chemical components varied erratically over space, and they were affected by properties of the aquifer, topography, hydrometeorology and anthropological activities. The concentration of iron and manganese in the studied area exceeded the standard by more than 75%, followed by nitrite, lead and aluminum which exceeded the standard by 10%~20%. The change in TDS was consistent with the concentration of the main ions that exceeded the standard because an increase in TDS altered dissolution/precipitation of rock salt, gypsum and dolomite, as well as the adsorption/desorption of cations in the aquifers.【Conclusion】For groundwater to reach the drinking water standard in Horqin District of Tongliao City, the excessive iron and manganese need to be removed, and the concentration of nitrite, lead and aluminum also need to be attenuated.

关 键 词：通辽科尔沁地区 地下水化学特征 数理统计分析 

分 类 号：P641.3[天文地球—地质矿产勘探]