Sustainable remediation of an anionic dye in aqueous solutions using modified aluminosilicate as a highly efficient and reusable adsorbent

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-13 DOI:10.1007/s11144-025-02794-3

Hadjer Bousemat, Samira Ziane-Hezil, Fatiha Bessaha

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Abstract

This study aims to remove an anionic dye, namely Bemacid Blue (BB), from an aqueous solution using an aluminosilicate adsorbent. The adsorbent was characterized using XRD, SEM, Zeta potential, and BET analysis. The results show that BET analysis resulted in a significant increase in specific surface area (from 15.84 to 101.6 m² g⁻¹). Following the isoelectric point determination, zeta potential analysis revealed electrostatic interactions. The experimental results show that optimal adsorption occurs at a pH of 6.1 after 120 min of contact at 55 °C, with an adsorption capacity of 202.75 mg g⁻¹, allowing for the treatment of solutions containing up to 800 mg L⁻¹ of pollutant. The pseudo-second order and Elovich models had the highest correlation coefficients (R² > 0.999), indicating complex adsorption mechanisms. Adsorption isotherms fit the Langmuir–Freundlich model of heterogeneous adsorption. The scanning electron microscopy (SEM) analysis confirmed good adsorption, with pores filled after adsorption. The use of energy dispersive spectroscopy (EDX) revealed that adsorption mechanisms included hydrogen bonding, ion exchange, and hydrophobic and electrostatic interactions. Finally, material regeneration tests resulted in 60% desorption after five successful cycles. This study demonstrates the effectiveness and stability of this aluminosilicate in adsorption and regeneration processes, paving the way for potential applications in the treatment of highly polluted industrial effluents containing anionic toxic contaminants.

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用改性硅酸铝作为高效可重复使用吸附剂对阴离子染料进行可持续修复

本研究旨在利用铝硅酸盐吸附剂从水溶液中去除阴离子染料，即贝马酸蓝（BB）。采用XRD、SEM、Zeta电位和BET分析对吸附剂进行了表征。结果表明，BET分析导致比表面积显著增加（从15.84增加到101.6 m2 g−1）。在等电点测定之后，zeta电位分析揭示了静电相互作用。实验结果表明，在55℃条件下，接触120 min后，在pH为6.1的条件下吸附效果最佳，吸附量为202.75 mg g−1，可处理高达800 mg L−1的污染物溶液。拟二阶模型和Elovich模型的相关系数最高（R2 > 0.999），说明吸附机理复杂。吸附等温线符合Langmuir-Freundlich非均相吸附模型。扫描电镜（SEM）分析证实吸附良好，吸附后孔隙填充。利用能量色散光谱（EDX）揭示了吸附机制包括氢键、离子交换、疏水和静电相互作用。最后，经过5次成功循环后，材料再生试验结果为60%的解吸。本研究证明了这种铝硅酸盐在吸附和再生过程中的有效性和稳定性，为处理含有阴离子毒性污染物的高污染工业废水铺平了道路。

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.