Removal of metals from water using MOF-based composite adsorbents

Abstract

Metal-organic frameworks (MOFs)-based composites have attracted significant research interest, especially in the removal of metal ion pollutants from water. MOFs are regarded as excellent metal ion adsorbents due to their...

Recent progress in high-performance environmental impacts of the removal of radionuclides from wastewater based on metal–organic frameworks: a review

“…162,163 These properties allow MOFs to be promising materials for removing toxic and radioactive metal ions in nuclear waste. 164–166 Recently, MOFs have been reported for the removal of toxic and radioactive elements from the environment to manage pollution. 167–170…”

“…162,163 These properties allow MOFs to be promising materials for removing toxic and radioactive metal ions in nuclear waste. [164][165][166] Recently, MOFs have been reported for the removal of toxic and radioactive elements from the environment to manage pollution. [167][168][169][170] MOFs: an overview and fabrication methods MOFs, part of the crystal porous materials family, are made up of metal assembliessuch as metal ions or groupsand linkers linked together by coordination bonds.…”

Sulfonated Metal–Organic Framework Mixed-Matrix Membrane toward Direct Lithium Extraction

“…It would be ultimately desirable for the selectivity of direct lithium extraction membranes to approach that of adsorbents, within the order of 10−100. 10,34,36,64,65…”

“…Recent lithium supply expansion has been with rapid but energy-intensive mineral ore mining . Separation technology for lithium has expanded from precipitation to adsorption, − solvent extraction, and membrane separation. − The latter is favorable due to its low energy, small physical footprint, and chemical-free regeneration. Membrane technology has been used for desalination and monovalent–divalent cation separations, with recent research highlighting the challenges in separating monovalent–monovalent cations, namely, lithium–sodium and lithium–potassium. − Due to their identical charge, angstrom-scale differences in diameters (±1 Å) and reversed dehydration energy trend (Δ G Li > Δ G Na > Δ G K ), lithium–sodium ion separation is challenging. , …”

Imidazole-Based Metal–Organic Framework for the “On1–Off–On2” Fluorescence-Based Detection of Picric Acid and the Adsorption of Congo Red

“…Metal–organic frameworks (MOFs) are coordination polymers of metal atoms connected by organic ligands. The structural and functional properties of MOFs strongly depend on the types of metals and ligands, which facilitates the production of materials with a range of pore sizes and topologies, as well as different exposed functional groups. − For example, the preparation of MOFs with exposed −NH 2 , −OH, and pyridyl groups enables the selective capture of different substances. − Simultaneously, the stability of MOFs can be improved by the following: , (1) The interactions between softer ligands with softer metal ions can improve the stability of MOFs; (2) high-valent metal ions are used to connect with oxygen donors on carboxylate ligands to improve coordination between the metal and the ligand; and (3) synthesis of superhydrophobic MOFs by functionalizing the ligands with pendant hydrophobic groups. Method 1 usually utilizes nitrogen-containing ligands to coordinate divalent metals, and polydentate N -heterocycles, such as imidazole, tetrazole, triazole, and pyrazole, are often used as nitrogen donors.…”