Zwitterion Adsorbent of Crosslinked Chitosan-Benzil/Algae/Coal Fly Ash for Anionic (Remazol Brilliant Blue R) and Cationic (Thionine) Dyes Removal: Box–Behnken Design Optimization

IF 4.7 3区工程技术 Q2 ENGINEERING, ENVIRONMENTAL

Journal of Polymers and the Environment Pub Date : 2024-09-03 DOI:10.1007/s10924-024-03388-1

Ruihong Wu, Ali H. Jawad, Elmira Kashi, Salis Auwal Musa, Zeid A. ALOthman

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Abstract

In this work, a zwitterion adsorbent which consists of crosslinked chitosan-benzil/algae/coal fly ash (CS-BZ/Alg/FA) was developed for the removal of two structurally different anionic dye (remazol brilliant blue R (RBBR)) and a cationic dye (thionine (THN)). The physicochemical characteristics of CS-BZ/Alg/FA were investigated by several analytical techniques including specific surface area, XRD, FTIR, FESEM and EDX analyses. Moreover, response surface methodology and Box–Behnken design (RSM–BBD) was adopted as a statistical tool to optimize the adsorption operational parameters for THN and RBBR dyes removal. Thus, the optimal adsorption conditions were determined as follows: CS-BZ/Alg/FA dose of 0.1 g/100 mL, solution pH 10 for THN, and solution pH 4 for RBBR. Adsorption equilibrium isotherm data for RBBR and THN dyes by CS-BZ/Alg/FA were well described by Freundlich (multilayer adsorption) and Langmuir (monolayer adsorption) isotherm models respectively. Thus, the maximum adsorption capacities of CS-BZ/Alg/FA towards THN and RBBR were found to be 69.0 mg/g and 259.9 mg/g, respectively at 25 °C. Moreover, the pseudo second order model accurately represents the kinetic data for the adsorption of both THN and RBBR dyes. The adsorption thermodynamic functions indicate the adsorption process of THN and RBBR was spontaneous and endothermic in nature. Ultimately, this research presents the CS-BZ/Alg/FA as an eco-friendly amphoteric adsorbent with preferable capability for capturing anionic and cationic dyes from aqueous environment.

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交联壳聚糖-苯偶酰/藻类/煤粉灰用于去除阴离子（雷马唑艳蓝 R）和阳离子（硫氨酸）染料的齐聚物吸附剂：箱式贝肯设计优化

本研究开发了一种由交联壳聚糖-苯齐/藻类/粉煤灰（CS-BZ/Alg/FA）组成的齐聚物吸附剂，用于去除两种结构不同的阴离子染料（雷马唑艳蓝 R (RBBR)）和一种阳离子染料（硫氨酸 (THN)）。通过比表面积、XRD、FTIR、FESEM 和 EDX 分析等多种分析技术研究了 CS-BZ/Alg/FA 的理化特性。此外，还采用了响应面方法和方框-贝肯设计（RSM-BBD）作为统计工具，以优化去除 THN 和 RBBR 染料的吸附操作参数。因此，最佳吸附条件确定如下：CS-BZ/Alg/FA 剂量为 0.1 g/100 mL，THN 的溶液 pH 值为 10，RBBR 的溶液 pH 值为 4。CS-BZ/Alg/FA 对 RBBR 和 THN 染料的吸附平衡等温线数据分别用 Freundlich（多层吸附）和 Langmuir（单层吸附）等温线模型进行了很好的描述。因此，在 25 °C 时，CS-BZ/Alg/FA 对 THN 和 RBBR 的最大吸附容量分别为 69.0 mg/g 和 259.9 mg/g。此外，伪二阶模型准确地反映了 THN 和 RBBR 染料的吸附动力学数据。吸附热力学函数表明，THN 和 RBBR 的吸附过程具有自发和内热的性质。最终，这项研究表明 CS-BZ/Alg/FA 是一种环保型两性吸附剂，具有从水环境中捕捉阴离子和阳离子染料的优越性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Polymers and the Environment 工程技术-高分子科学

CiteScore

9.50

自引率

7.50%

发文量

297

审稿时长

9 months

期刊介绍： The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.