基于旋流增效的淋洗设备在重金属污染土壤中的应用  

Application of Hydro-cyclone Enhanced Soil Washing Equipment in the Remediation of Heavy Metal Contaminated Soil

作　　者：张汝壮 徐子茜 ZHANG Ru-zhuang;XU Zi-qian(Shanghai Chengtou Environment Ecological Remediation Technology Co.,Ltd.,Shanghai 200232,China;Shanghai Engineering Research Center of Contaminated Sites Remediation,Shanghai 200232,China)

机构地区：[1]上海城投上境生态修复科技有限公司,上海200232 [2]上海污染场地修复工程技术研究中心,上海200232

出　　处：《环境科技》2024年第5期34-39,共6页Environmental Science and Technology

基　　金：上海城投(集团)有限公司科技创新计划项目(CTKY-PTRC-2023-002-002-007).

摘　　要：为解决土壤淋洗设备存在的设计依据不足、筛分组合效率低、淋洗搅拌强度不足、功能模块单一等问题,研制出一套基于旋流分级减量、旋流增效洗脱适用于不同污染类型的土壤淋洗设备。设备现场试验发现,各级筛分精度可达95%;土壤中As,Sb的去除率均达76%,相较常规淋洗设备,相同条件下,该设备淋洗效率可提高25%以上;通过氧化、气浮模块的嵌入应用,其可有效修复As-苯胺、As-苯并(a)芘、As-总石油烃(As-TPH)等复合污染土,去除率均达70%以上。该设备在上海某重金属污染场地进行中试应用发现,实际应用效果较好。In response to the theoretic basis for the design of contaminated soil washing equipment,low screening efficiency,low stirring intensity,and few functional modules,a set of soil washing equipment based on hydro-cyclone classification and reduction,and hydro-cyclone enhanced washing and stripping,suitable for different kinds of polluted soil,has been developed.Through on-site experiments,the sieving precision of the materials remaining on the screens from each screening stage of the washing equipment reach 95%.The removal rates for As(arsenic)and Sb(antimony)can both reach 76%.Compared to the conventional washing equipment,the washing efficiency has been increased by more than 25%under the same conditions.By applying oxidation and air flotation modules,it can effectively remediate complex contaminated soils such as As-aniline,As-benzo(a)pyrene,and As-TPH(Total Petroleum Hydrocarbons)with removal rates all above 70%.The pilot application of this equipment in a heavy metal contaminated site in Shanghai has shown good practical application effects.

关 键 词：土壤淋洗设备 淋洗搅拌强度 旋流分级减量 重金属 复合污染土壤 中试应用 

分 类 号：X5[环境科学与工程—环境工程]