Recent progress in the removal of mercury ions from water based MOFs materials

Mercury pollution of water has caused serious health problems in humans. Therefore, reducing the mercury content into the drinking water standard is currently a priority measure. As a kind of porous frame materials with adjustable structure and easy to design and synthesize, metal-organic frameworks (MOFs) materials have attracted widespread attention. Their large specific surface area and adjustable pores make MOFs an excellent platform for removing mercury metals from water. In this review, we discussed the mercury removal performance of functionalized MOF powder materials, including sulfur-functionalized MOF, nitrogen-functionalized MOF, nitrogen-sulfur co-functionalized MOF, MOF composites and MOFs-derived materials. Compared to MOF powder materials, MOF membranes can easily recycle and effectively avoid secondary pollution. Therefore, we also reviewed nanofiber MOF membranes and polymer-supported MOF membranes. At the same time, in order to further explore the potential of MOF materials in heavy metal adsorption, we also introduced the current problems and challenges faced by MOF materials in detail, and proposed future research directions and difficulties to be overcome. We will hope that the review may provide more researchers with a more comprehensive, intuitive, clear cognition. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

This review explores the potential of metal-organic frameworks (MOFs) materials in mercury removal from water, including functionalized MOF powder materials and MOF membranes, as well as future research directions and challenges.