Orderly Porous Covalent Organic Frameworks-based Materials: Superior Adsorbents for Pollutants Removal from Aqueous Solutions

Abstract

Summary Covalent organic frameworks (COFs) are a new type of crystalline porous polymers known for chemical stability, excellent structural regularity, robust framework, and inherent porosity, making them promising materials for capturing various types of pollutants from aqueous solutions. This review thoroughly presents the recent progress and advances of COFs and COF-based materials as superior adsorbents for the efficient removal of toxic heavy metal ions, radionuclides, and organic pollutants. Information about the interaction mechanisms between various pollutants and COF-based materials are summarized from the macroscopic and microscopic standpoints, including batch experiments, theoretical calculations, and advanced spectroscopy analysis. The adsorption properties of various COF-based materials are assessed and compared with other widely used adsorbents. Several commonly used strategies to enhance COF-based materials’ adsorption performance and the relationship between structural property and sorption ability are also discussed. Finally, a summary and perspective on the opportunities and challenges of COFs and COF-based materials are proposed to provide some inspiring information on designing and fabricating COFs and COF-based materials for environmental pollution management.

Adsorption of Rare Earth Ce3+ and Pr3+ Ions by Hydrophobic Ionic Liquid

“…Adsorption is a premier technique found to be a powerful and cost-effective method for the elimination and recovery of heavy metal ions and precious RREs. Many adsorbents such as activated carbon [ 6 ], agricultural waste and by-products [ 7 ], and organic frameworks [ 8 ] are found to be prolific in terms of cost and being ecofriendly; however, the efficiency and regeneration is always a concerning factor. Recently, the development of nanomaterials and ionic liquids has led to a new era of technological advancements in the field of wastewater treatments and recovery of REEs.…”

Design and fabrication of photoactive imidazole-based poly(ether-imide)s and a polyimide/HBP-modified SiO2 composite: toward high heat-resistance, antimicrobial activity and removal of heavy metal ions

“…47 Extraction of these pollutants from drinking water sources through adsorption is one of the best technical and economical solutions owing to its high efficiency, low cost, and ease of operation. 48 As the prepared polymeric compounds are insoluble in water therefore in this work, synthesized polyimides and nanocomposite were used for eliminating Co 2+ and Hg 2+ ions from wastewater through adsorption. Polymeric samples contain various functional groups, including imidazole NH, ether linkage, and carbonyl.…”

Effective adsorptive removal of anionic dyes from aqueous solution

“…PMNs elimination of the two dyes RB5 and CR at separate pH (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) values. Concentrations of 1.8310 -3 molL -1 of the adsorbent dose of RB5, 25 o C and 0.02 g were examined while the initial concentration of CR, 25 o C and 0.02 g of PMNs was 1.310 -3 molL -1 .…”

“…[1] Because of the highly coloured waste discharged by dyeing plants, they are significant sources of contamination in the environment. [2][3][4][5] Colorants are light, chemical, and oxidizing agent resistant, and their chemical composition is biologically inert. As a result, it is difficult to extract once released into the aquatic world.…”