高放废物处置库川井预选区地下水水化学及同位素特征  

Groundwater hydrochemistry and isotopic characteristics of Chuanjing preselected area for High Level Radioactive Waste Disposal Repository

作　　者：贺小黑 张卫民[1,2] 徐卫东[1,2] 王健[1,2] 张群利[1,2] 李效萌 黄精涛[1,2] HE Xiaohei;ZHANG Weimin;XU Weidong;WANG Jian;ZHANG Qunli;LI Xiaomeng;HUANG Jingtao(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang,Jiangxi 330013,China;School of Water Resources&Environmental Engineering,East China University of Technology,Nanchang,Jiangxi 330013,China)

机构地区：[1]东华理工大学水资源与环境工程学院,南昌330013 [2]东华理工大学核资源与环境国家重点实验室,南昌330013

出　　处：《世界核地质科学》2020年第3期242-249,共8页World Nuclear Geoscience

基　　金：国家国防科技工业局项目(编号:科工二司[2014]1587号);东华理工大学博士启动基金项目(编号:DHBK2017139);东华理工大学2019年实验技术开放项目(编号;DHSYKF-2019-007)资助

摘　　要：通过利用Piper三线图等方法对川井预选区内地下水和地表水样品的测试结果进行分析,并用SPSS对主要水化学指标进行相关性分析,探讨该区域地下水化学特征及其控制因素,并研究了地下水氢氧同位素特征,结果表明:浅部地下水和地表水处于氧化环境,偏碱性,为高矿化度水,pH值和TDS值均符合黏土岩选址的基本标准;径流区的地表水与地下水的水化学类型差别不大,地表水与地下水水力联系密切;地表水对地下水的补给作用不甚明显,地下水在补给的过程中经历了较强的蒸发作用;深部地下水的循环交替能力明显弱于浅层地下水,其在地下滞留的时间相对浅层地下水要长;碳酸盐岩的溶解不是浅层地下水水化学组分的来源,溶解的Ca^2+离子与Mg^2+离子主要来自地层中常见的矿物高岭石、伊利石和石膏的溶解。In Chuanjing preselected area for High Level Radioactive Waste Disposal Repository,16 surface water and groundwater samples were collected and detected with methods of piper trilinear nomograp,and correlation of main hydrochemistry index was analyzed by using the SPSS software,the chemical characteristics of groundwater and its control factors were discussed and the hydrogen and oxygen isotope characteristics of groundwater were studied.The main conclusions are described as follows:shallow groundwater and surface water are of high salinity which formed in oxidized environment and slight alkaline condition,the pH value and TDS value conform to the basic criteria of clay rock site selection in China;surface water and groundwater in runoff area are similar in hydrochemical types and have close hydraulic relationship;the surface water play little role in recharging groundwater and undergone strong evaporation in the process of recharge,deep groundwater is weaker in circulation and alternations than that of shallow groundwater,but with longer retention time than that of shallow groundwater and the chemical composition of shallow groundwater is not mainly from the dissolution of carbonate rocks,but from the dissolved Ca2+and Mg2+of the mineral in the stratum,such as kaolinite,illite and gypsum.

关 键 词：高放废物处置库 川井 水化学类型 氢氧同位素 地下水 

分 类 号：P642.22[天文地球—工程地质学]