不同表面活性剂修复重金属污染土壤的试验研究

摘要

Ethylenediamine tetraacetic acid disodium salt(EDTA) and citric acid were used as complexing agent to investigate the influence of the removal rate of heavy metals,including elution temperature,mixing time,complexing agents addition,material ratio of EDTA,citric acid and pH in the soil.Heavy metals removal efficiency of sodium dodecyl benzene sulfonate(SDBS,anionic surfactant),dodecyltrimethlammonium bromide(DTAB,cationic surfactants) and alkyl polyglycoside(APG,non-ionic surfactants) was 0.1 ％ SDBS.%以乙二胺四乙酸二钠(EDTA)和柠檬酸为络合剂,通过正交试验考察了淋洗温度、搅拌时间、络合剂使用量、EDTA与柠檬酸物料比以及pH对土壤中重金属去除率的影响,并在此基础上进一步考察了十二烷基苯磺酸钠(SDBS,阴离子表面活性剂)、十二烷基三甲基溴化铵(DTAB,阳离子表面活性剂)和烷基糖苷(APG,非离子表面活性剂)对重金属去除效果的影响.结果表明,加入0.1％的十二烷基苯磺酸钠去除重金属的效果最佳.