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  

Study on the Remediation of Carbendazim Pesticide-Contaminated Sites by Sodium Humate and Sodium Dodecyl Benzene Sulfonate

作　　者：雒宇 LUO Yu(Beijing Survey and Design Research Institute Co.Ltd.,Beijing 100083)

机构地区：[1]北京市勘察设计研究院有限公司,北京100083

出　　处：《环境卫生工程》2023年第1期69-73,共5页Environmental Sanitation Engineering

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:5 mg/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780 mg/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195 mg/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,15 mg/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;5 mg/L的腐植酸钠对氨氮的总淋滤效果最好。综合评估,15 mg/L的腐植酸钠淋滤效果优于十二烷基苯磺酸钠。Heterocyclic pesticides were organic pollutants presented in pesticide-contaminated sites,which had stable properties and could be adsorbed on the surface of soil particles for a long time,which made it difficult to repair the site polluted by heterocyclic pesticides.In order to find an effective remediation method for land contaminated by heterocyclic pesticides,the solubilization and elution effects of sodium humate and sodium dodecyl benzene sulfonate(SDBS)on carbendazim and organic matter in soil and CODCr and ammonia nitrogen in leachate were studied by taking a typical heterocyclic pesticide-contaminated site as the research focus.The results showed that 5 mg/L sodium humate had the most significant solubilization effect on carbendazim and organic matter,and its removal rates could reach 81%and 82%,respectively.SDBS had the most significant solubilization effect on carbendazim in soil with a removal rate of 85%at 780 mg/L,and the solubilization effect on organic matter was the most significant at 195 mg/L with a removal rate of 72%.In leachate,15 mg/L sodium humate had the best effect on CODCr in the initial stage and total leaching process,5 mg/L sodium humate had the best effect on the total leaching of ammonia nitrogen.Overall,15 mg/L sodium humate had a better effect than SDBS.

关 键 词：土壤修复 农药污染地块 表面活性剂 增溶 

分 类 号：X53[环境科学与工程—环境工程]