State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Environ Int. 2021 Jan;146:106273. doi: 10.1016/j.envint.2020.106273. Epub 2020 Nov 29.
Advanced oxidation process (AOP), with a high oxidation efficiency, fast reaction speed (relatively no secondary pollution), has become one of the core technologies of industrial wastewater and advanced drinking water treatment. Heterogeneous Fenton-like oxidation process (HFOP) is a kind of AOP, which developed rapidly in recent years in such a way to overcome the disadvantages of traditional Fenton reaction. Metal-organic frameworks (MOFs) and their derivatives become essential heterogeneous catalysts for organics mineralization due to the large specific surface area, abundant active sites, and ease of structural regulation. However, the knowledge gap on the mechanism and the fate of heterogeneous catalyst species during organics degradation activities by MOFs presents considerable impediments, particularly for a wide application and scaling up the process. This work has the potential to provide guidance and ideas for researchers and engineers in the fields of environmental remediation, environmental catalysis and functional materials. This review focuses on clarifying the critical mechanism of •OH production from MOFs and derivatives as well as its action on the organic's degradation process. The recent developments in MOF based HFOP are compared, and more attention is paid for the following aspects in this review: (1) classifies systematically progressive modification methods of MOFs by chemical and physical treatments; (2) analyzes the fate of catalytic species during treating organic wastewater; (3) proposes design ideas and principles for improving the performance of MOFs catalysts; (4) discusses the main factors influencing the catalytic properties and practical application; (5) summarizes the possible research challenges and directions for MOFs and their derivatives as catalysts applied to wastewater treatment in the future.
高级氧化工艺(AOP)具有氧化效率高、反应速度快(相对无二次污染)等特点,已成为工业废水和先进饮用水处理的核心技术之一。类芬顿氧化工艺(HFOP)是一种 AOP,近年来发展迅速,克服了传统芬顿反应的缺点。金属有机骨架(MOFs)及其衍生物由于具有较大的比表面积、丰富的活性位点和易于结构调节等特点,成为有机矿化的必要非均相催化剂。然而,MOFs 降解有机物过程中催化剂物种的机制和归宿方面的知识差距仍然存在,这对其广泛应用和工艺放大带来了相当大的障碍。这项工作有可能为环境修复、环境催化和功能材料等领域的研究人员和工程师提供指导和思路。本文综述了 MOFs 和衍生物产生•OH 的关键机制及其在有机降解过程中的作用。比较了基于 MOF 的 HFOP 的最新进展,并在以下几个方面更加关注:(1)通过化学和物理处理系统地分类 MOFs 的渐进修饰方法;(2)分析催化物种在处理有机废水过程中的归宿;(3)提出了改进 MOFs 催化剂性能的设计思路和原则;(4)讨论了影响催化性能和实际应用的主要因素;(5)总结了未来 MOFs 及其衍生物作为催化剂应用于废水处理的可能研究挑战和方向。