地下水污染场地异位修复及阻隔防控联合治理模式  

Joint Treatment Model of Heterotopic Restoration and Barrier Prevention Control of Groundwater Pollution Sites

作　　者：郑廷雨 姚元 刘睿[2] 叶渊 朱焰 刘玉涛 宋坦坦 ZHENG Tingyu;YAO Yuan;LIU Rui;YE Yuan;ZHU Yan;LIU Yutao;SONG Tantan(Center International Group Co.,Ltd.,Beijing 100176,China;Institute for Ecological Research and Pollution Control of Plateau Lakes,School of Ecology and Environmental Science,Yunnan University,Kunming 650500,China)

机构地区：[1]森特士兴集团股份有限公司,北京100176 [2]云南大学生态与环境学院高原湖泊生态与治理研究院,昆明650500

出　　处：《有色金属（冶炼部分）》2024年第12期109-118,共10页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2019YFC1805700)。

摘　　要：为解决地下水修复过程不彻底、处置周期较长等问题,基于某炼钢场地地下水有机污染提出新的治理模式。该模式首先对地下水污染区域边界建设止水帷幕,然后通过基坑开挖的方式清理污染地下水和含水层介质土壤。污染地下水通过基坑降水进行收集和处理,含水层介质土壤进行异位热脱附修复。结果表明,止水帷幕渗透系数小于1×10^(-7) cm/s,避免修复过程中污染地下水扩散,修复后的地下水和土壤中苯并(a)芘浓度分别低于检出限(0.004μg/L和0.1 mg/kg),污染物去除率接近100%。该联合治理模式具有污染修复彻底、效率高,为场地地下水修复开拓了新思路。Address to incomplete groundwater remediation and long disposal cycles,a new treatment model was proposed based on the organic pollution of groundwater in a certain steelmaking site.In this model,the waterproof curtain was first built on the boundary of groundwater polluted area,and then the polluted groundwater and aquifer medium soil were cleaned up by the way of foundation pit excavation.The polluted groundwater was collected and treated by foundation pit dewatering,and the aquifer medium soil was repaired by ectopic thermal desorption.The results show that the permeability coefficient of the waterproof curtain is less than 1×10^(-7) cm/s,which avoids the diffusion of contaminated groundwater during the remediation process.After restoration,the concentration of benzo(a)pyrene in groundwater and soil is lower than the detection limit of 0.004μg/L and 0.1 mg/kg respectively,and the removal rate of pollutants is close to 100%.The joint treatment model has the advantages of thorough pollution restoration and high efficiency,and opens up a new idea for the site groundwater restoration.

关 键 词：地下水修复 止水帷幕 污染场地 热脱附修复 

分 类 号：X53[环境科学与工程—环境工程]