双反应活性中心类芬顿氧化体系中微界面作用机制与自由基转化过程调控及其对高盐废水中毒害有机污染物的强化预处理技术原理

本课题针对高盐废水治理与废盐资源化的技术需求，以高盐体系中毒害有机污染物（芳环、杂环类）的高效去除为目标，研究调控高盐胁迫下双反应活性中心类芬顿氧化体系中微界面作用机制与自由基转化过程以提升催化活性与稳定性，制备可高效利用氧化剂的双反应活性中心类芬顿催化材料。揭示催化材料晶貌结构与表面化学调控在类芬顿反应过程中与氧化剂、活性自由基以及有机污染物之间的构效关系，考察高盐体系中毒害有机污染物的降解行为与机理，结合分析毒害有机污染物的降解路径与中间产物，探讨抑制卤代消毒副产物生成的有效途径。在此基础上，阐明影响高盐废水预处理效果的主控因素与调控机制，构建水力循环式反应器，并综合考虑氧化剂利用率与总有机碳去除率，对类芬顿反应体系构建与中试运行条件进行优化，形成基于双反应活性中心类芬顿氧化技术为核心的高盐废水强化预处理工艺，为我国高盐废水治理与废盐资源化提供理论指导与技术支撑。

Faced with the problems of treatment and resource of salinity wastewater, this project aims at the removal of toxic organic pollutants from the high-salt and complex system. By improvement of micro-interface interaction and radical transformation of Fenton-like reaction system with dual-reaction centers, both catalytic activity and stability are significantly enhanced. According to this technical mechanism, Fenton-like catalysts with dual-reaction centers are prepared to enhance the utilization of oxidants. Furthermore, the influence mechanism of catalyst-base properties including structure, morphology, crystal phase and surface functionalization on radical production and pollutants removal are well illustrated. By analyzing the possible degradation route and intermediates of toxic organic pollutants during the reaction process, the pathway and mechanism for decrease of disinfection by-products is discussed. Based on the above research, spiral-flow type catalytic reactor is designed in which the catalyst activity, oxidants utilization and TOC removal are evaluated. Via systematically optimizing the operation conditions, the efficient Fenton-like technology is developed to remove the toxic organic pollutants from high salinity wastewater, which can provide the theory and technology guide to treatment and resource of high salinity wastewater.