Authors Borchert, K. ; Frenzel, R. ; Gerlach, N. ; Reis, B. ; Steinbach, C. ; Schwarz, S. ; Schwarz, D.
Title Waterborne phenolic, triazine-based porous polymer particles for the removal of toxic metal ions
Date 08.11.2022
Abstract Highly functional and also highly porous materials are presenting great advantages for applications in energy storage, catalysis and separation processes, which is why a continuous development of new materials can be seen. To create a material combining the promising potential interactions of triazine-groups with the electrostatic or hydrogen bonding interactions of phenolic groups, a completely new polymeric resin was synthesized. From an eco-friendly dispersion polymerization in water, a copolymer network was obtained, which includes nine hydroxyl groups and one triazine ring per repetition unit. The polymer forms highly porous particles with specific surface areas up to 531·m2/g and a negative streaming potential over a great pH range, showing promising properties for adsorption application. Therefore, screening adsorption experiments with eight toxic metal ions were conducted in realistically low concentrations aiming to achieve drinking water standards defined by the WHO. In almost all instances (especially Cr3+, Ni2+, Cd2+, and Pb2+) a very high removal efficiency was seen (with 94% and above), achieving drinking water standards in various cases. The adsorption isotherms of Ni2+, Cd2+, and Pb2+ were studied more detailed achieving very good adsorption capacities (16·mg Ni2+/g, 24·mg Cd2+/g, and 90·mg·Pb2+/g).
Journal JCIS Open 8 (2022) 100066

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