Dual-charged cryogels for efficient removal of dyes and oil-water separation in wastewater treatment

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2025-03-28 DOI:10.1016/j.reactfunctpolym.2025.106279

Pengfei Yang , Yan Qin , Zheng Xu , Wangxu Hou , Yujie Guo , Kexin Zheng , Junying Li , Weitao Hao , Liying Sun , Feng Ma

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Abstract

With the development of modern industry, water pollution has become an urgent environmental issue, so it is very urgent to find one-step strategy to treat with complicated wastewater. In this paper, poly (vinyl imidazole -co- methacrylic acid) cryogels were prepared with freezing polymerization for the treatment of complicated wastewater containing not only cationic dyes and anionic dyes but also common organic solvents. For the preparation of cyrogels, with the increase of the molar ratio of methacrylic acid to vinyl imidazole, the adsorption capacity of dyes varied as 271.33–187.09 mg·g⁻¹ for methyl blue, 342.96–150.16 mg·g⁻¹ for methyl orange, 7.76–85.72 mg·g⁻¹ for methylene blue, and 19.19–110.10 mg·g⁻¹ for crystal violet. Thus, by adjusting the molar ratio of monomers, a variety of versatile cryogels could be designed to treat with dye solutions of different type and concentration. Adsorption mechanism was then investigated through kinetics and isotherm, which showed single-layer chemical adsorption. Moreover, the surface hydrophilicity of porous cryogels made it possible for the separation of oil-water mixtures with over 95 % separation efficiency by selective water permeation. This study provides a quite new approach to prepare cryogels with both positive and negative charges.

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.