承认MES/APG混合表面活性剂的功能组,以提高对子[a]pyrene的溶解性
Liyuan Wu1,2,3, Yaxin Liu1,2,3, Xin Wang4
1Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 102616, China.
Environmental science & technology
|April 4, 2024
概括
环保的表面活性剂,脂肪酸甲基硫酸盐 (MES) 和基多糖化物 (APG),有效地在土壤中溶解[a]烯. 这种新的方法通过通过键和低极性相互作用形成稳定的微粒来增强修复.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 绿色化学 绿色化学
背景情况:
- [a]二烯的高醇/水分区系数阻碍了土壤的去除.
- 混合表面活性剂增加了溶解度,但有不清楚机制的二次污染风险.
- 对多环芳 (PAHs) 开发有效和环保的修复剂至关重要.
研究的目的:
- 引入和评估一种新的方法,使用脂肪酸甲基硫酸盐 (MES) 和基多糖化物 (APG) 进行[a]二烯溶解.
- 阐明MES和APG在增强甲烯溶解度中的复合机制.
- 与传统表面活性剂相比,评估MES/APG混合物的效率.
主要方法:
- 通过使用不同比例的MES和APG来研究[a]pyrene的溶解.
- 确定[a]皮烯的表面溶解度 (Sw) 和分子溶解率 (MSR).
- 通过功能组分析和菌形成研究,分析了MES和APG之间的相互作用机制.
主要成果:
- 在6g/L的最佳MES/APG比率为7:1时,可以达到8.58mg/L的表面溶解度和1.31的MSR.
- 这种性能与传统的表面活性剂Tween 80 (MSR,0.95) 相似.
- 在APG的基组和MES的硫酸组以及MES的低极性基组之间的键,推动了增强的溶解.
结论:
- MES和APG之间的协同效应显著增强了[a]pyrene的溶解.
- 该机制涉及MES分子之间减少的静电排斥,以及与[a]pyrene结构的有利相互作用.
- 这项研究为选择环保表面活性剂为有效的PAH污染土壤修复提供了基础.
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