摘要
为研究污染场地地下水中砷(As)的运移规律,选取我国西南某机械制造厂污染场地为研究区,根据场地调查和污染物检测结果,利用GMS软件建立了地下水流和溶质运移模型,分析了不确定性因素补给量、含水层渗透系数和抽水量对污染场地地下水中砷运移的影响。结果表明:污染场地中部地下水中砷污染羽呈辐射状递减分布;砷的运移分布范围与补给量、含水层渗透系数成正相关,但污染源处地下水中砷浓度随含水层渗透系数的增大而降低,而民用水井中砷浓度随含水层渗透系数的增大而增大;场地地下水中砷污染羽分布范围和浓度随着抽水量的增加而逐渐减小。本研究结果可为污染场地调查中砷污染范围的厘定和风险管控提供科学依据。
In order to study the arsenic transport mechanism in groundwater of contaminated sites,we select a polluted site of a machinery factory in southwest China as the study area.According to the site investigation and pollutant detection results,we establish the groundwater flow and solute transport model with GMS software.We analyze the effects of uncertain factors such as recharge,permeability coefficient of aquifer and pumping water on arsenic transport in groundwater of the contaminated site.The results are as follows:the distribution of arsenic pollution plume in groundwater at the middle of the site is radially decreasing;the migration and distribution range of arsenic is positively correlated with the recharge and the permeability coefficient of aquifer.The arsenic concentration at the groundwater of pollution source decreases with the increase of the aquifer permeability coefficient,while the arsenic concentration in the civil well increase with the increase of the aquifer permeability coefficient.The distribution and concentration of arsenic pollution plume in groundwater gradually decrease with the increase of pumping water.This study can provide scientific basis for the determination of arsenic pollution range and risk control in the investigation of contaminated sites.
作者
李明
张刘俊
冯涛
闫晶
陈浩
龚香宜
杨国栋
LI Ming;ZHANG Liujun;FENG Tao;YAN Jing;CHEN Hao;GONG Xiangyi;YANG Guodong(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan University of Science and Technology,Wuhan 430081,China;Geophysical Exploration Academy of China Metallurgical Geology Bureau,Baoding 071051,China)
出处
《安全与环境工程》
CAS
CSCD
北大核心
2022年第2期141-150,共10页
Safety and Environmental Engineering
基金
湖北省自然科学基金项目(2019CFB451)
冶金矿产资源高效利用与造块湖北省重点实验室开放基金项目(2020zy003)。
关键词
污染场地
地下水
砷污染
溶质运移
数值模拟
contaminated site
groundwater
arsenic pollution
solute transport
numerical simulation
