表面活性剂增效电动技术修复多环芳烃污染土壤

研究了电动修复过程中修复时间和表面活性剂Triton X-100、鼠李糖脂对多环芳烃芘污染土壤的修复效果的影响。结果表明,在电动修复过程中,随着修复时间的增加,芘的去除率相应提高。通过向电解液中添加表面活性剂Triton X-100,芘的去除率从11.64%提高到了23.42%,当在电解液中添加浓度为40倍CMC的鼠李糖脂后去除率升高至36.29%,阳极附近土壤甚至达到了92.49%,这表明Triton X-100和鼠李糖脂均能促进土壤中芘的溶解和迁移,鼠李糖脂的促进作用高于Triton X-100。

Surfactant enhanced electrokinetic remediation of polycyclic aromatic hydrocarbons contaminated soil

Effect of remediation time,Triton X-100 surfactant,and rhamnolipid on the electrokinetic remediation of pyrene-contaminated soil was investigated.Results indicated that the pyrene removal efficiency increased with increasing remediation time.Addition of Triton X-100 to the electrolyte increased the pyrene removal efficiency from 11.64% to 23.42%.This efficiency further increased to 36.29% upon 40-fold addition of CMC rhamnolipid to the electrolyte;the soil section near the anode achieved an efficiency of 92.49%.These results indicated that Triton X-100 and rhamnolipid were efficient agents for the dissolution and migration of pyrene,while rhamnolipid had a higher promoting effect than Triton X-100.