一种基于糖的新型Gemini表面活性剂对多个DNAPLs的溶解效应和微观机制
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.
一种新的基于糖的双子座表面活性剂 (SANG) 有效地去除多种地下水污染物. 这种表面活性剂通过改变菌体结构并表现出竞争性和协同性的溶解效应,增强了密集非水相液体 (DNAPLs) 的修复.
科学领域:
- 环境化学环境化学
- 环境工程 环境工程
- 材料科学 材料科学 材料科学
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.
- 现有的方法面临着多个共存的DNAPLs的挑战,降低了修复效率.
- 需要新的表面活性剂来改善各种地下水污染物的溶解.
研究的目的:
- 评估基于糖的新型双子表面活性剂 (SANG) 对多个DNAPLs的溶解效应和机制.
- 研究常见地下水污染物的共同溶解过程中的竞争和协同作用.
- 为了解DNAPL溶解动力学建立一个概念模型.
主要方法:
- 一种新的基于糖的双子座表面活性剂 (SANG) 的合成和表征.
- 用五种常见污染物 (NAP,PCE,MCB,CTC,NB) 进行溶解试验.
- 动态光散射 (DLS) 和冷传导电子显微镜 (Cryo-TEM) 用于微粒结构分析.
- 发展质量转移导向-扩散模型 (MDAM).
主要成果:
- 桑格显示出高溶解能力,特别是在CTC (MSR=3.61) 等化碳化合物中.
- 在污染物溶解后,小胞形态从球形变为囊泡或类似虫的结构.
- 对NAP和NB观察到协同效应,而PCE,MCB和CTC表现出竞争性抑制.
- MDAM模型将水相扩散确定为主要的动力学因素.
结论:
- 桑格有效地溶解多个DNAPL,具有不同的竞争性和协同效应.
- 观察到的菌根结构变化增强了溶解能力和溶解点.
- MDAM模型为了解和优化SEAR流程提供了一个框架.
- 结果为改善污染水层中的SEAR效率提供了洞察力.
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