摘要
该研究采用Tween 80、Triton X-100、十二烷基硫酸钠(SDS)、十二烷基苯磺酸钠(SDBS)、槐糖脂(SL)、烷基糖苷(AG)6种常用的表面活性剂与鼠李糖脂(RL)进行复配,研究不同复配表面活性剂对芘增溶效率的影响。结果发现:Triton X-100、Tween 80可以显著提高RL对芘的增溶效率;低浓度(<600 mg/L)SL与RL复配也可促进芘溶解;AG与鼠李糖脂复配对芘增溶效率影响较小;加入SDS和SDBS则抑制RL对芘的增溶效率。通过Clint等模型分析发现,鼠李糖脂与Triton X-100复配后分子间产生协同效应,当两者质量比为9∶1时对芘的增溶效率较高并且具有良好的pH稳定性,优于其他复配体系。该研究可为鼠李糖脂在多环芳烃增溶应用中的推广提供理论依据。
Six different surfactants,including Triton X-100,Tween 80,dodecyl sodium sulfate(SDS),sodium dodecyl benzene sulfonate(SDBS),sophorolipid(SL)and alkyl-glucoside(AG)were mixed with rhamnolipid(RL)to study the effect of their mixture on the solubilization of pyrene.From the results,the binary system RL-Triton X-100 and RL-Tween 80 can significantly improve the solubility of pyrene in water,while the mixture of rhamnolipid and sophorolipid can only increase solubilization of pyrene under low concentration(<600 mg/L).The mixture of AG and RL showed little impact on the solubilization of pyrene compared to RL only.In contrast,SDS and SDBS inhibited the ability of rhamnolipid to dissolve pyrene.Synergistic effect was found in RL-Triton X-100 mixture from the Clint model analysis.When the mass ratio between rhamnolipid and Triton X-100 was 9∶1,the mixture showed higher pyrene solubility and better pH stability,which showed priority compared to other mixed systems.This study is intended to provide clues for increasing the ability of rhamno⁃lipid for polycyclic aromatic hydrocarbon washing remediation.
作者
朱清禾
ZHU Qinghe(Shanghai Academy of Environmental Sciences,Shanghai 200233,China;State Environmental Protection Engineering Center for Urban Soil Contamination Control and Remediation,Shanghai 200233,China;School of Environmental Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2021年第9期93-99,共7页
Environmental Science & Technology
基金
上海市“科技创新行动计划”优秀技术带头人项目(19XD1434900)。
关键词
鼠李糖脂
复配表面活性剂
芘
增溶效率
rhamnolipid
mixed surfactants
pyrene
solubilization efficiency
