Effective removal of cationic dyes in a single aliquot using thiophene based bis-chalcone polymers

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2025-02-13 DOI:10.1016/j.reactfunctpolym.2025.106189

P. Sowmya, Abraham Joseph

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引用次数: 0

Abstract

This study explores the dye adsorption efficacy of thiophene bearing bis-chalcone based polymers poly [(1E,4E)-1,5-Di-2-thienylpenta-1,4-dien-3-one] (PTCA) and poly[(1E,4E)-2,4-dimethyl-1,5-di(thiophen-2-yl)penta-1,4-dien-3-one] (PTCM). Both PTCA and PTCM show high removal efficiency towards cationic dyes such as Methylene Blue, Malachite Green, Crystal violet, and Rhodamine B compared to the anionic dyes such as Methyl Red, Congo Red, and Methyl Orange. Since both PTCA and PTCM show the highest removal efficiency towards Crystal Violet dye, it was chosen as a representative cationic dye to understand different factors affecting adsorption. Experimental data indicates that for PTCA, the maximum adsorption capacity observed was 151.49 mg/g and for PTCM, the maximum adsorption capacity observed was 142.28 mg/g. The form-fitting of adsorption data with the Langmuir adsorption isotherm model indicates monolayer adsorption. The kinetic investigation demonstrates that the adsorption follows pseudo second order kinetics, hence chemisorption is involved in the process that drives the adsorption. The high dye removal efficiency towards CV is due to the combined effect of intra-particle diffusion processes and surface adsorption. Recyclability study reveals that PTCA retains 96.42 % removal efficiency and PTCM retains 92.46 % removal efficiency after five cycles, which shows promising reusability and regenerative nature of polymeric adsorbents.

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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.