ADVANCES IN CYCLODEXTRIN-MEDIATED ENHANCED OXIDATION FOR REMOVAL OF ORGANIC CONTAMINANTS FROM WATER
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摘要: 水体中顽固有机污染物会威胁水环境安全,可利用氧化方法对其进行去除。环糊精作为环境友好型材料,其介导强化氧化可延长氧化剂在水中半衰期,形成氧化“微环境”,能提高有机污染物的去除率,扩展化学原位修复的应用范围,受到环境领域研究者的重视。通过全面分析相关文献,归纳了环糊精与氧化剂及污染物形成二重及三重包络物的机制,阐述了包络在保护氧化剂、拉近氧化剂与污染物距离、增加氧化效率、控制氧化产物等方面的作用,分析了影响氧化效率的因素。结合实际应用效果,讨论了环糊精介导强化氧化对顽固有机污染物去除的有效性,并对未来的研究方向及应用前景进行了展望。Abstract: Refractory organic contaminants in water bodies endanger the safety of the water environment and may typically be removed by oxidation. As an environmentally friendly material, cyclodextrin-mediated enhanced oxidation can extend the half-life of oxidants in water, create an oxidizing "micro-environment", increase the removal rates of organic pollutants, and broaden the application of chemical in-situ remediation, all of which have received increasing attention from environmental researchers. This review summarized the binary and ternary inclusion complex mechanisms between cyclodextrin and contaminants and analyzed the factors affecting oxidation efficiency. It further illustrated the role of inclusion in oxidant protection, bridging oxidants and pollutants, increasing oxidation efficiency, and regulating oxidation products. The efficacy of cyclodextrin-mediated enhanced oxidation in removing refractory organic contaminants in real-world applications was also examined in this review, as well as the directions and prospects of its application.
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Key words:
- cyclodextrin /
- enhanced oxidation /
- refractory organic pollutants /
- inclusion mechanism
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