ABSTRACT

Fluoride and arsenic are hazardous inorganic contaminants due to associated health risks and relatively higher levels of occurrence in groundwater. Metal-organic frameworks, (MOFs) with their high surface area, versatile building blocks and numerous active sites, are a novel approach to fluoride and arsenic uptake. This review presents the different types of MOFs for fluoride and arsenic removal along with a study of dynamic breakthrough times and cost analysis. MOF performances are based on a variety of synthesis methods, notable among which solvothermal one is more described. However, all research works concluded that MOFs have poor yield compared to conventional adsorbents. But, their high adsorption capacity, tailored chemical structure and ionic uptake of fluoride and arsenic make them a more favorable option than many other adsorbents. The cost of different MOFs usually varies between 0.1 and 5 US$/g depending on the synthesis routes.

摘要

氟化物和砷是有害的无机污染物，因为它们具有相关的健康风险，并且在地下水中的含量相对较高。金属有机框架 (MOF) 具有高表面积、多功能构建单元和众多活性位点，是一种吸收氟化物和砷的新方法。本综述介绍了用于去除氟化物和砷的不同类型的 MOF，以及动态突破时间和成本分析的研究。MOF 的性能基于多种合成方法，其中溶剂热法得到了更多的描述。然而，所有研究工作都得出结论，与传统吸附剂相比，MOF 的产率较低。但是，它们的高吸附容量、定制的化学结构以及对氟化物和砷的离子吸收使它们成为比许多其他吸附剂更有利的选择。