土壤石油烃传质过程和界面萃取修复机理

We are facing the increasingly serious environmental pollution by oil contaminated soil. It is especially difficult to treat the high oil-contaminated soil and site. The basis studies on new green and sustaninable solvent extraction technologies for treating high concentration petroluem hydrocarbons in the soil are necessary. Based on the theory of forces between particles and surface, and mass transfer theory, combing the modern testing methods, the ionic assistant-enhanced permeating behavior of petroleum hydrocarbons and extraction mechenism from liquid-solid surfaces will be studied in this project. The specific research contents include analyzing and investigating properties and petroleum contaminants distribution of soil samples, bringing forward the effect mechanisms of ionic assistant on clean separation in respect of oil-solvent and oil-sand interactions, finding out the concentration changes of oil fractions with time and space, and getting desorption dynamics. Based on the studies described above, a theoretical basis and instruction for industrial application of solvent technology for high oil-contaminated soil are offered.

目前我国土壤的石油污染状况日益严重，高浓度石油污染土壤的修复尤其困难，开展绿色、可持续溶剂萃取方法修复高浓度石油污染物的基础研究具有现实意义。本项目基于颗粒界面力学和质量传递理论，结合现代高科技测试手段，对离子态助剂存在体系下土壤石油烃渗透行为和界面萃取机理进行研究。分析土壤结构和理化性质及受污染土壤中石油烃组分分布规律，从微观分子层面的相互作用力和界面性质出发，探讨离子态助剂对实现高浓度石油烃相对洁净萃取过程的内在影响机制，获悉有机溶剂和离子态助剂体系下土壤石油烃的渗透传质行为、界面吸附特性及脱附动力学，为离子态助剂促进的高浓度石油烃污染土壤溶剂萃取修复技术的现场应用提供科学依据和理论指导。

目前我国土壤的石油污染状况日益严重，高浓度石油污染土壤的修复尤其困难，开展绿色、可持续溶剂萃取方法修复高浓度石油污染物的基础研究具有现实意义。本项目基于颗粒界面力学和质量传递理论，结合现代高科技测试和分子模拟手段，完成了对离子态助剂存在体系下土壤石油烃去除行为和界面萃取机理的研究。项目分析了土壤结构和理化性质及受污染土壤中石油烃组分分布规律，从微观分子层面的相互作用力和界面性质出发，探讨了离子态助剂对实现高浓度石油烃相对洁净萃取过程的内在影响机制，获悉了有机溶剂和离子态助剂体系下土壤石油烃的传质行为、界面吸附特性及去除过程，为离子态助剂促进的高浓度石油烃污染土壤溶剂萃取修复技术的现场应用提供科学依据和理论指导。本项目在国内外具有影响力的期刊发表高水平文章25篇（其中SCI二区以上论文15篇），申请国家发明专利10项（授权9项）；培养本科生5名（加拿大西安大略大学实习生4名）、硕士生5名、博士生2名、出站博士后1名。