阴-非离子表面活性剂对污染[土娄]土中菲和萘的洗脱  

Elution of Phenanthrene and Naphthalene in Lou Soil by Anionic-nonionic Surfactants

作　　者：杨亚莉[1] 万卷敏[2] 李珍[1] 邓红侠[1] 孟昭福[3] 杨亚提[1] 

机构地区：[1]西北农林科技大学理学院,陕西杨凌712100 [2]白银有色集团股份有限公司环境保护部,甘肃白银730900 [3]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《西北农业学报》2015年第9期127-133,共7页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：陕西省农业科技攻关计划(2014K02-12-02)

摘　　要：旨在以最少的增效试剂用量达到最大的增效修复效果,采用批处理方法,研究在临界胶束浓度(Critical Micelle Concentration,CMC)之下,阴离子表面活性剂SDS和非离子表面活性剂TritonX-100、Brij35和Tween80,以及在CMC浓度之上的Brij35和Tween80对污染土娄土中菲和萘总的洗脱效果。结果表明,在CMC以下,随着单一表面活性剂质量浓度的增大,菲和萘的总洗脱百分数逐渐增大,不同表面活性剂洗脱百分数大小顺序为SDS>Tween80>TritonX-100>Brij35,其洗脱机理主要归因于表面活性剂分子对疏水性有机物在水介质中溶解度的增加。混合表面活性剂对菲和萘污染土娄土具有较好的修复效果,其最佳洗脱质量浓度比为Tween80∶SDS=3∶5、TritonX-100∶SDS=1∶8、Brij35∶SDS为21∶200时,洗脱百分数达到100%。离子强度增加有利于增加SDS对菲和萘的洗脱百分数,而不利于增加非离子表面活性剂对菲和萘的洗脱百分数。质量浓度低于CMC的表面活性剂溶液以增溶的方式促进菲和萘从土壤中洗脱,阴-非离子表面活性剂混合使用可以高效净化土壤中的污染物菲和萘。The purpose of this study was to achieve maximum enhanced remediation with minimal reagent, batch experiments were clone with four surfactants concentration under critical micelle eoncentration（CMC） respectively and Brij35, Tween80 concentration above their CMC. The results showed that the elution percentage of phenanthrene and naphthalene on Lou soil increased with the increase of surfactant concentration under surfactant critical micelle concentration （CMC）, the sequence of elution percentage is SDS〉Tween80〉TritonX-100〉Brij35, the surfactant-enhanced remediation enhancements is mainly attributed to the increase of solubility of solute in aqueous phase. The mixed surfactant-enhanced remediation showed better performance on elution of phenanthrene and naphthalene from soil than single surfactant, while the mixing quality ratio of SDS and Tween80 was 3 ： 5, SDS and TritonX-100 was 1 ： 8 and Brij35 ： SDS was 21 ： 200, phenanthrene and naphthalene were eluted completely. High NaC1 concentration benefited the elution percentage of phenanthrene and naphtha- lene by SDS, but hindered the elution percentage of phenanthrene and naphthalene by nonionic surfactants （Triton X-100, Tween-80 and Brij35）. Therefore, the surfactant solutions below the CMC can also promote phenanthrene and naphthalene solubilization from the soil, The mixed of anionic-noionic surfactant can efficiently purified phenanthrene and naphthalene in contaminants soil.

关 键 词：土娄土 阴-非离子表面活性剂 菲 萘 洗脱 有机污染物 

分 类 号：X53[环境科学与工程—环境工程]