Analogize of metal-organic frameworks (MOFs) adsorbents functional sites for Hg2+ ions removal

The presence of mercury ions in water and its detrimental effects on human and aqua life has become a significant threat and challenge for environmental protection. Therefore, developing new water purification materials is essential for the environment and public safety. This review summarizes studies and analogizes metal–organic frameworks (MOFs) as Hg2+ ions removing materials from the water. The development of MOF adsorbents, the role of functional sites for detecting heavy metal ions, removal potential, principle, and MOFs properties are discussed significantly. Furthermore, the comparative studies of various functionalities compared to sulfur functionalities of MOFs, adsorption interactions, adsorption kinetics, isotherm, challenges, and future perspective are presented well.