活性炭和MgZnAl层状三氢氧化物去除阴离子和阳离子染料的协同效应：实验和理论见解

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2025-02-25 DOI:10.1016/j.ces.2025.121409

Chaymae Hmimen , Alae Elabed , Saber Boubakri , Mohamed Amine Djebbi , Abdesslem Ben Haj Amara , Saad Ibnsouda Koraichi , Soumya Elabed

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引用次数: 0

摘要

本研究介绍了一种利用镁锌层状三氢氧化物（LTH）和源自摩洛哥坚果壳的活性炭（AC）来增强水溶液中MO和MB的吸附性能的新方法。通过共沉淀法、炭化法和H3PO4活化法合成了LTH_AC复合材料，并用XRD、FTIR、Raman、BET、SEM和TEM对其进行了表征。LTH_AC500复合材料表现出良好的吸附能力，MO吸附量为154.219 mg/g， MB吸附量为112.989 mg/g。吸附动力学符合准二级模型，表明主要是化学吸附，而Freundlich等温线模型表明在非均质表面有多层吸附。热力学分析证实了该过程的自发性，MO吸附为吸热吸附，MB吸附为放热吸附。DFT理论研究揭示了染料与复合材料之间的π-π堆积、配位相互作用、阴离子交换和电荷转移等机制。此外，该复合材料表现出稳定性、可回收性和抗干扰性，证明了其在染料废水处理中的潜力。

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Synergistic effects of activated carbon and MgZnAl layered triples hydroxides for removing anionic and cationic dyes: Experimental and theoretical insights

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Synergistic effects of activated carbon and MgZnAl layered triples hydroxides for removing anionic and cationic dyes: Experimental and theoretical insights

This study introduces a novel approach using MgZnAl-layered triple hydroxide (LTH) and activated carbon (AC) derived from argan nutshells, designed to enhance MO and MB adsorption from aqueous solutions. Synthesized via coprecipitation, carbonization, and H₃PO₄ activation processes, the LTH_AC composites were thoroughly characterized using XRD, FTIR, Raman, BET, SEM, and TEM. The LTH_AC500 composite showed good adsorption capacities, achieving 154.219 mg/g for MO and 112.989 mg/g for MB. The adsorption kinetics followed a pseudo-second-order model, indicating predominant chemisorption, while the Freundlich isotherm model suggested multilayer adsorption on heterogeneous surfaces. Thermodynamic analysis confirmed the process’s spontaneity, with MO adsorption being endothermic and MB adsorption exothermic. DFT theoretical studies revealed mechanisms such as π-π stacking, coordination interactions, anion exchange, and charge transfer between the dyes and the composite. Additionally, the composite demonstrated stability, recyclability over five cycles, and interference resistance, proving its potential for dye wastewater treatment.

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.