LDHs活化过硫酸盐去除水中有机污染物的应用研究

Application of LDHs Activated Persulfate in Removing Organic Pollutants from Water

高级氧化技术(SR-AOPs)具有宽pH耐受性、强氧化性以及方便操作性等优势而备受关注。层状双金属氢氧化物(LDHs)因其独特的层状结构优势、阴离子可交换性、层板组成可调控性和结构记忆效应等特性,在活化过硫酸盐方面具有优良的反应活性和催化优势。文章从简要论述LDHs的基本结构和性能出发,详细介绍了共沉淀法、离子交换法、结构重建法三种常见制备方法,重点综述了LDHs材料作为非均相催化剂活化过硫酸盐在水污染处理领域的应用现状。最后,对LDHs活化过硫酸盐体系持续优化以及未来的研究方向进行了展望。

The advanced oxidation technology based on sulfate radical(SR-AOPs)has attracted much attention due to its strong oxidation property,wide pH tolerance and easy operation.Layered double-metal hydroxide(LDHS)are characterized by their unique layered structure advantages,anion exchangeability,controllable laminate composition,and structural memory effect,in the activation of persulfate shows a good reaction activity and catalytic advantages.In this paper,the basic structure and properties of LDHs are briefly discussed,and three common preparation methods of LDHS,including coprecipitation,ion exchange and structure reconstruction,are introduced in detail.The application of LDHS and its composites as heterogeneous catalysts to activate persulfate in the field of water pollution treatment was reviewed.Finally,the continuous improvement of LDHS catalytic system and the future research directions are prospected.