College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Institute of Plant and Environmental Protection, Beijing Academy of Agricultural and Forestry Sciences, Beijing, 100097, China.
Chemosphere. 2021 Jan;262:127675. doi: 10.1016/j.chemosphere.2020.127675. Epub 2020 Aug 6.
With the increasingly serious water environment problem, the persulfate-based advanced oxidation process (PS-AOP) has attracted considerable attention in water pollution treatment. To date, graphitic carbon nitride (g-CN) has been greatly favored by researchers in activating PS for its capability and unique superiorities. Though g-CN-based PS-AOP exhibits huge development prospects in removing organic pollutants, the review about its research progress has not been reported. Herein, this paper reviews the modification of g-CN on the basis of its applications and properties for PS activation systematically. The activation mechanisms of g-CN-based modified materials are analyzed in detail, and the main formation pathways of radicals and non-radicals and their interaction mechanism with pollutants are thoroughly summarized. Finally, the existing challenges and future development directions of the PS-AOP driven by g-CN-based materials are critically discussed. The key purpose is to provide a reference for promoting the further popularization of this novel and efficient cooperative AOP in water purification industries, as well as multidisciplinary inspirations for g-CN-involved fields.
随着水环境问题的日益严重，过硫酸盐基高级氧化工艺（PS-AOP）在水污染处理中引起了相当大的关注。迄今为止，石墨相氮化碳（g-CN）因其能力和独特的优势，在激活 PS 方面受到了研究人员的极大青睐。尽管基于 g-CN 的 PS-AOP 在去除有机污染物方面具有巨大的发展前景，但尚未有关于其研究进展的综述报道。本文在 g-CN 应用和性质的基础上，对其用于 PS 激活的改性进行了系统的综述。详细分析了 g-CN 基改性材料的活化机制，彻底总结了自由基和非自由基的主要形成途径及其与污染物的相互作用机制。最后，批判性地讨论了由 g-CN 基材料驱动的 PS-AOP 目前存在的挑战和未来的发展方向。主要目的是为促进这种新型高效协同 AOP 在水净化行业的进一步推广提供参考，并为 g-CN 相关领域提供多学科的启示。
