污染场地多相抽提低碳修复布井方案优化模拟研究  

Optimization of Low-Carbon Multi-Phase Extraction Remediation Well Locations in Contaminated Sites by Simulation

作　　者：金嘉路 杨逸文 王震 张婉莹 周龑 张峰 李磊 崔长征[1] JIN Jialu;YANG Yiwen;WANG Zhen;ZHANG Wanying;ZHOU Yan;ZHANG Feng;LI Lei;CUI Changzheng(State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,Shanghai Key Laboratory of Environmental Standards and Risk Management of Environmental Protection Chemical Pollutants,School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China;State Environmental Protection Engineering Center for Urban Soil Contamination Control and Remediation,Shanghai Academy of Environmental Sciences,Shanghai 200233,China;Sinopec Fifth Construction Co.,Ltd.,Guangzhou 510145,China;Shanghai Greenment Environmental Co.,Ltd.,Shanghai 200001,China;SINOPEC Engineering Group Luoyang R&D Center of Technology,Luoyang,Henan 471003,China)

机构地区：[1]华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海市环境保护化学污染物环境标准与风险管理重点实验室,上海200237 [2]上海市环境科学研究院,国家环境保护城市土壤污染控制与修复工程技术中心,上海200233 [3]中石化第五建设有限公司,广东广州510145 [4]上海格林曼环境技术有限公司,上海200001 [5]中石化炼化工程(集团)股份有限公司洛阳技术研发中心,河南洛阳471003

出　　处：《环境科学研究》2023年第8期1596-1606,共11页Research of Environmental Sciences

基　　金：国家重点研发计划重点专项(No.2018YFC1803300)。

摘　　要：多相抽提(multi-phase extraction,MPE)技术常用于土壤与地下水修复,高效、低碳和低成本的布井方案优化是多相抽提技术进一步发展的关键.本研究通过自主编写的MATLAB-TMVOC联合优化程序,以模拟的苯污染场地为研究对象,对抽提井群水平布设方案和抽提井开筛位置进行优化,并探究了土壤渗透率对抽提井布设方案的影响.结果表明:MATLAB-TMVOC联合优化程序具有快速高效的特点,可以免除复杂的人工调参过程,相比人工优化可节省50%以上的模拟时间和90%以上的模拟量.优化后的抽提井布设间距随着土壤渗透率的降低而缩小,对于本研究所构建的模型,当土壤渗透率处在2×10^(-13)~8×10^(-12)m^(2)范围内时,土壤渗透率每减少10^(-13)m^(2),优化后的抽提井间距会减小约0.13 m,即土壤渗透率减少一个数量级,抽提井间距应减小17.8%~48.3%.对于土壤渗透率低于10-13m2的黏性地层,污染羽核心位置的布井间距应当小于4 m.优化后的修复方案能够降低成本、减少碳排放,当目标去除率为90%时,优化后的MPE修复方案可以节约29.7%~34.7%的运行成本、22.7%~29.3%的总成本以及21.4%~40.4%的碳排放量.研究显示,污染场地MPE修复井布设方案应当与场地渗透率和污染羽分布相结合,采取在污染源至污染羽尾方向上由密至疏的非均匀布井方案,以实现高效低碳修复.Multi-phase extraction(MPE)technology is commonly used for soil and groundwater remediation.Optimizing well locations for efficient,low-carbon and cost-effective remediation is crucial to the further development of MPE technology.In this study,a selfdeveloped MATLAB-TMVOC joint optimization program was used to optimize the horizontal location and screen opening position of the extraction wells in a simulated benzene-contaminated site.The influence of soil permeability on the layout plan of extraction wells was also investigated.The results showed that the MATLAB-TMVOC joint optimization program exhibited rapid and efficient characteristics.It eliminated the complex manual parameter adjustment process,saved more than 50% of simulation time and reduced more than 90% of simulation compared to manual optimization.The optimized spacing between extraction wells decreased with decreasing soil permeability.For the model constructed in this study,when the soil permeability was within the range of 2×10^(-13) m^(2) to 8×10^(-12) m^(2),a decrease of 10^(-13) m^(2) in soil permeability led to a reduction of 0.13 m in the optimized spacing between extraction wells.With a decrease of one order of magnitude in soil permeability,the spacing between extraction wells should be reduced by 17.8% to 48.3%.For cohesive formations with soil permeability below 10^(-13) m^(2),the spacing between wells in the core area of the pollution plume should be less than 4 m.The optimized remediation plan can reduce costs and carbon emissions.When the target removal rate is set at 90%,the optimized MPE remediation plan can save 29.7% to 34.7% of operational costs,22.7%to 29.3% of total costs,and 21.4% to 40.4% of carbon emissions.The study revealed that the arrangement of MPE remediation wells in contaminated sites should be combined with site permeability and pollution plume distribution,and a non-uniform well layout plan from dense to sparse in the direction from the pollution source to the tail of the pollution plume in order to achieve effecti

关 键 词：多相抽提 污染场地 布井方案 低碳修复 TMVOC 

分 类 号：X53[环境科学与工程—环境工程]