Enhanced adsorption of amido black (AB) dye using PAN/EPI-DMA-bentonite composite fibers as a novel electrospun solution for wastewater treatment

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Colloid and Polymer Science Pub Date : 2025-06-18 DOI:10.1007/s00396-025-05440-5

Aiizat Ikhwan Abdul Jalil, Mohammad Shahadat, Murat Yılmaz, Suzylawati Ismail

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Abstract

This study investigates the use of PAN/EPI-DMA-bentonite composite fibers, synthesized through electrospinning, for the efficient adsorption of anionic azo dye, amido black (AB), in wastewater treatment. The composite fibers were developed by incorporating epichlorohydrin dimethylamine (EPI-DMA) modified bentonite into a polyacrylonitrile (PAN) matrix, enhancing the surface’s positive charge and increasing adsorption sites. Characterization using SEM–EDX, FTIR, and BET analyses confirmed successful bentonite integration, increased fiber diameter, and enhanced surface area, contributing to improved dye affinity. Adsorption experiments revealed that a 3 wt% EPI-DMA-bentonite dosage achieved optimal AB dye removal, with the composite demonstrating a maximum adsorption capacity of 1829 mg/g at 200 ppm dye concentration. Acidic conditions (pH 2–4) significantly improved adsorption efficiency, reaching up to 92% dye removal due to increased electrostatic attraction between the anionic dye and cationic sites on the composite fibers. Isotherm and kinetic studies indicated that the adsorption process adheres to the Langmuir isotherm model and pseudo-second-order kinetic model, suggesting monolayer adsorption and chemisorption mechanisms. Compared to conventional adsorbents, the PAN/EPI-DMA-bentonite composite exhibited superior adsorption capacity, highlighting its potential as an effective and scalable solution for industrial dye-laden wastewater treatment.

Graphical Abstract

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PAN/ epi - dma -膨润土复合纤维对氨黑（AB）染料的吸附性能研究

研究了静电纺丝合成的PAN/ epi - dma -膨润土复合纤维在废水处理中对阴离子偶氮染料氨基黑（AB）的高效吸附。将环氧氯丙烷二甲胺（EPI-DMA）改性膨润土掺入聚丙烯腈（PAN）基体中，增强表面正电荷，增加吸附位点，从而制备出复合纤维。SEM-EDX、FTIR和BET分析证实了膨润土的成功整合，增加了纤维直径，增加了表面积，有助于提高染料亲和力。吸附实验表明，当epi - dma -膨润土用量为3 wt%时，该复合材料对AB染料的去除效果最佳，在200 ppm染料浓度下，该复合材料的最大吸附量为1829 mg/g。酸性条件（pH 2-4）显著提高了吸附效率，由于复合纤维上阴离子染料和阳离子位点之间的静电吸引力增加，染料去除率高达92%。等温线和动力学研究表明，吸附过程符合Langmuir等温线模型和拟二级动力学模型，表明吸附机理为单层吸附和化学吸附。与传统吸附剂相比，PAN/ epi - dma -膨润土复合材料表现出优越的吸附能力，突出了其作为工业染料废水处理有效和可扩展的解决方案的潜力。图形抽象

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来源期刊

Colloid and Polymer Science 化学-高分子科学

CiteScore

4.60

自引率

4.20%

发文量

111

审稿时长

2.2 months

期刊介绍： Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.