Covalent organic frameworks as promising materials for the removal of metal and organic pollutants from water

Magnetic Covalent Organic Framework Composites for Wastewater Remediation

“…To mitigate these issues, surface modification has been proposed to protect MNPs from issues such as oxidation, corrosion, or agglomeration, as well as to introduce functional groups. Currently, a variety of reactants, including APTES, [ 9–13 ] dopamine, [ 14–16 ] polyethyleneimine, [ 17 ] and 3,4‐dihydroxybenzaldehyde [ 53 ] have been employed to modify MNPs. The most striking advantage of this tactic is that the introduction of functional groups such as NH 2 or COOH is conducive to induce the growth of COFs on the surface of MNPs, [ 18 ] resulting in a highly efficient combination of COFs with MNPs.…”

“…[ 3–5 ] Porous materials such as zeolites, activated carbons, metal–organic frameworks (MOFs), and covalent organic frameworks (COFs) have been widely explored due to their low density, tailored pore structure, and large specific surface area, which are advantageous for adsorption, separation, sensing, energy, gas storage, and elimination. [ 6–13 ]…”

Porous organic polymers as a promising platform for efficient capture of heavy metal pollutants in wastewater

“…According to studies, COFs are an effective adsorbent material for removing heavy metals from water that occurs via the adsorption mechanism by electrostatic interactions and ion exchange. 157 Functional groups comprising N, O, or S atoms have a strong capacity for adsorption of heavy metal ions. Via some sophisticated designs, the integration of specific functional groups like –SO 3 H, –SCH 3 , –SH, –CN, –COOH, and –NH 2 into the architecture of COFs can considerably increase the efficacy of metal ion removal.…”

One-step synthesis of magnetic covalent organic framework composite for the adsorption of marine toxin okadaic acid

“…3 COFs are crystalline, fully organic porous materials featuring large surface areas, uniform pore sizes and shapes, tunable pore surfaces, and high chemical stabilities, [4][5][6][7] attractive properties in view of selective adsorption of a group of contaminants. Consequently, in the recent years bulk COFs as fine powders have been reported as novel adsorbents for batch adsorption of a wide variety of contaminants from water, such as biotoxins, 3,8 pharmaceuticals, [9][10][11][12] dyes, 13 perfluorinated compounds, 14 synthetic fragrances, 15 and heavy metal ions. 16 However, a typical COF synthesis results in a powder featuring polydisperse particles with sizes in the micrometre range, and using such material for batch adsorption of contaminants can lead to difficulties in its isolation from the sample matrix or high column backpressure when directly packed into a column for static adsorption.…”