揭示DNAPLs溶解机制:水性链长度如何控制基于糖的新型Gemini表面活性剂的特性
Yu Yao1, Xueming Qin2, Yufeng Fu1
1Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China; National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China.
疏水性链条的长度显著影响Gemini表面活性剂在地下水整治中的性能. 较长的链条,如SANG 13,增强密集非水相液体 (DNAPLs) 的溶解,以有效清理水库.
科学领域:
- 环境化学环境化学
- 环境工程 环境工程
- 合体和表面化学
背景情况:
- 表面活性剂增强含水层修复 (SEAR) 对于去除密集的非水相液体 (DNAPLs) 至关重要.
- 双子座表面活性剂在去除污染物方面具有独特的特性,但疏水性链条长度对其性能的影响尚不清楚.
研究的目的:
- 系统地研究疏水性链条长度对基于糖的离子-非离子双子表面活性剂 (SANG) 的物理化学性质和DNAPL溶解能力的影响.
- 在SEAR应用中建立结构-属性关系以优化Gemini表面活性剂.
主要方法:
- 合成和表征五种具有不同疏水性链长度的SANG表面活性剂 (SANG 06,08,09,10,13).
- 评估表面活动,水友性-脂友性平衡 (HLB),细胞行为和与四乙烯 (PCE) 的界面张力.
- 评估DNAPL的溶化和脱吸效率.
主要成果:
- 增加疏水性链条的长度显著改变了小菌的形成和溶解行为.
- 带有最长链的SANG 13表现出卓越的性能:最小的临界菌度 (0.086μg/L),最佳的HLB (16.85),超低的界面张力 (0.6mN/m与PCE),最大的菌 (26.80nm) 和最高的聚合数 (15.98).
- 桑格13实现了最高的DNAPL溶解和脱吸效率.
结论:
- 疏水性链条的长度是调节双子座表面活性剂在SEAR中的表现的关键因素.
- 这项研究提供了第一个系统的证据,将链条长度与物理化学性质和溶解机制联系起来.
- 这些发现支持通过指导表面活性剂设计来优化SEAR技术对DNAPL污染的地下水.
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