难降解有机废水是环境领域中的难题,若处理不当会对人类健康和生态环境造成严重危害,但目前常用的处理方法难以完全去除难降解有机物。薄膜型催化剂可同时实现物理分离和化学催化,且该技术具有废水处理效率高、无二次污染等特点,在环保领域备受关注。基于此,介绍了薄膜型催化剂的反应机理,综述了薄膜型催化剂的制备方法,包括共混法、表面涂层法和自下而上法;举例了薄膜型催化剂在几种难降解废水中的应用。最后,提出了当前薄膜型催化剂存在的问题并对未来的研究方向做出展望,为后续的技术研究提供启发与参考,以期制备出更加高效、廉价的薄膜型催化剂,提高难降解废水处理效果、减少环境污染。
The treatment of refractory organic wastewater is a difficult problem in the environmental field,and improper treatment of refractory organic wastewater can seriously affect the ecological environment and human health.However,the currently commonly treatment methods are unable to completely remove refractory organic matter.Thin-film catalysts can simultaneously achieve physical separation and chemical catalysis.Due to its high efficiency and no secondary pollution,this technology has attracted much attention in the field of environmental protection.This paper introduced the reaction mechanisms of thin-film catalyst.Then,the preparation methods of thin-film catalysts,including blending method,surface coating method and bottom-up method,were reviewed.The applications of thin-film catalysts in several refractory organic wastewater were summarized.Finally,this paper put forward the existing problems of thin-film catalyst,made an outlook on the future research direction,and provided inspiration and reference for subsequent technical research,with a view to prepare more efficient and inexpensive thin-film catalysts,improve the treatment effect of refractory wastewater and reduce environmental pollution.
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