ABSTRACT
Arsenic in drinking water as a contaminant has become a worldwide environmental concern due to the health effects. Therefore, As removal technologies have been received a primary attention whereas the adsorption technology is considered to be a prevailing method, as of its high removal efficiency and the easy operation. Metal-Organic frameworks (MOFs) have become a primary material for adsorptive removal of contaminants in water, due to their high surface area, adjustable porosity, and recyclability. As MOFs are unstable in water, pre and post synthetic modification and functionalization is common. Various MOFs have been used for arsenic removal with different synthesis techniques, composition and modifications. This review addresses the performance and mechanisms of As removal in various modified MOFs in detail. In order to compare the performance of MOFs, here we used partition coefficient (PC) instead of maximum adsorption capacity, which is sensitively influenced by initial loading concentrations. Furthermore, it discusses the scale-up issues and forthcoming pathway for research and development needs of MOFs for effective As removal. This review further elucidates the main removal mechanisms of As by MOFs.
