过硫酸盐氧化技术在石化场地有机污染土壤修复领域具有良好的应用前景，但技术效果受限于土壤污染特征和氧化反应的复杂性。环糊精具有超分子识别功能，能调控污染物土壤环境行为与过硫酸盐氧化等化学反应。然而，环糊精对过硫酸盐氧化降解土壤中有机污染物的调控机制及规律不清楚，限制了新型氧化技术的优化与应用。本项目将综合考虑石化场地土壤污染特征和氧化修复过程的复杂性，围绕石油烃、BTEX等石油类污染物，开展实验室测试、软件模拟和室外验证试验研究，构建过硫酸盐氧化效果的“土壤-污染物-应用参数”综合影响模型，识别污染物形态/传质/活性等相关因素的影响效应。进而，开展环糊精对污染物形态-传质-降解活性的综合调控和氧化剂自身的扩散-消耗过程研究，识别环糊精调控过硫酸盐氧化降解污染物的机制，构建环糊精的定量调控模型，阐明环糊精对过硫酸盐氧化降解反应的调控规律，为环糊精调控-过硫酸盐氧化组合技术的优化提供理论指导。

Persulfate oxidation systems exhibit potential application in petroleum-contaminated soil remediation fields. Performances of persulfate oxidation systems commonly are determined by both complexities of soil pollution and oxidation reactions. Cyclodextrins (CDs) are well-known host compounds with an unique advantage of molecular recognition. CDs are demonstrated to mediate environmental behavior and oxidation reactions of organic pollutants. The combination of CDs and persulfate usually exhibits improved remediation performances of contaminated soils, compared to the persulfate system without CD addition. Impacts of CDs on persulfate performances depend on soil, pollutant and technical process. Mechanisms and models (or rules) by which CDs mediate persulfate oxidation of organic pollutants in soil remain unclear. In this study, we aim at addressing these issues. .We will collect different types of petroleum-contaminated soils, considering both complexities of soil pollution and oxidation reactions. Petroleum hydrocarbon and BTEX are chosen as model petroleum-like contaminants. Comprehensive relationships of oxidation performances with soil, contaminant and technical processes will be developed to recognize important factors related to specification distribution, environmental transfer and oxidation potential of contaminants in soil. Effects of these factors on oxidation performances will be assessed, too. .We will study effects of CDs on specification distribution, environmental transfer and oxidation potential of organic pollutants in soil. These results are used to reveal CD mediation in persulfate oxidation of organic pollutants in soil. Transfer and consumption of the oxidant persulfate itself in soil will be investigated by using Feflow software simulation and soil incubation experiments. Taking into account both mediation effects of CDs and declining of the oxidant itself, we will develop a model of CD mediation in persulfate oxidation of organic pollutants in soil. This model will describe how the combination of CD inclusion and persulfate oxidation works in different soil situations. Summarily, expected findings of this study will provide theoretical basis to improvement and application of persulfate-based oxidation systems in soil remediation fields.