腐植酸钠和十二烷基苯磺酸钠修复多菌灵农药类污染地块研究雒宇(北京市勘察设计研究院有限公司,北京100083)【摘要】杂环类农药是农药化工场地中一种有机污染物,其性质稳定,可长期吸附于土壤颗粒表面,导致受其污染的场地难以修复。为寻找杂环类农药污染地块的有效修复方法,以某多菌灵农药生产企业污染土壤为对象,研究了腐植酸钠和十二烷基苯磺酸钠两种表面活性剂对土壤中多菌灵、有机质以及淋滤液中CODCr、氨氮的增溶洗脱效应。结果表明:5mg/L的腐植酸钠对土壤中多菌灵和有机质的增溶效果最显著,去除率分别可达81%和82%;十二烷基苯磺酸钠在780mg/L时对土壤中多菌灵的增溶效果最为显著,去除率可达85%,在195mg/L时对有机质的增溶效果最为显著,去除率可达72%。淋滤液中,15mg/L的腐植酸钠在初始阶段和总淋滤过程中对CODCr的淋洗效果最佳;5mg/L的腐植酸钠对氨氮的总淋滤效果最好。综合评估,15mg/L的腐植酸钠淋滤效果优于十二烷基苯磺酸钠。【关键词】土壤修复;农药污染地块;表面活性剂;增溶中图分类号:X53文献标识码:A文章编号:1005-8206(2023)01-0069-05DOI:10.19841/j.cnki.hjwsgc.2023.01.011StudyontheRemediationofCarbendazimPesticide-ContaminatedSitesbySodiumHumateandSodiumDodecylBenzeneSulfonateLUOYu(BeijingSurveyandDesignResearchInstituteCo.Ltd.,Beijing100083)【Abstract】Heterocyclicpesticideswereorganicpollutantspresentedinpesticide-contaminatedsites,whichhadstablepropertiesandcouldbeadsorbedonthesurfaceofsoilparticlesforalongtime,whichmadeitdifficulttorepairthesitepollutedbyheterocyclicpesticides.Inordertofindaneffectiveremediationmethodforlandcontaminatedbyheterocyclicpesticides,thesolubilizationandelutioneffectsofsodiumhumateandsodiumdodecylbenzenesulfonate(SDBS)oncarbendazimandorganicmatterinsoilandCODCrandammonianitrogeninleachatewerestudiedbytakingatypicalheterocyclicpesticide-contaminatedsiteastheresearchfocus.Theresultsshowedthat5mg/Lsodiumhumatehadthemostsignificantsolubilizationeffectoncarbendazimandorganicmatter,anditsremovalratescouldreach81%and82%,respectively.SDBShadthemostsignificantsolubilizationeffectoncarbendaziminsoilwitharemovalrateof85%at780mg/L,andthesolubilizationeffectonorganicmatterwas...