Development and optimization of a carbon nanotubes–kaolinite composite for highly efficient removal of methyl red dye from aqueous solutions

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-08-05 DOI:10.1007/s11144-025-02912-1

Ahmed F. Halbus, Zahraa H. Athab, Bashaer Jawad kahdum, Hussein Idrees Ismael, Abbas J. Atiyah, Hasan F. Alesary, Ahmed K. Kodeary

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引用次数: 0

Abstract

The current work involves the synthesis of a composite of carbon nanotubes and kaolinite (CNTs/kaolinite). This composite was synthesized using a simple evaporation and drying method. The synthesized materials were investigated using different techniques such as the XRD technique, SEM–EDS, Sears method, and point zero charges (pzc). The activity of synthesized materials was studied by following the removal of methyl red dye (MR) from its aqueous solution by adsorption over these synthesized materials. Different adsorption parameters and conditions were conducted such as the effect of the used doses of the adsorbent, period of adsorption, effect of temperature, and pH effect. The obtained results found that the best removal efficiency of MR dye was achieved upon using a dose (0.07 g) of the synthesized composite at 25 °C, and the optimum pH was 5. Also, it was found that the removal efficiency of this dye over composite was better than that in comparison with each of kaolinite and CNTs alone under the same adsorption circumstances. The adsorption behavior of MR dye onto the CNTs/kaolinite composite is well described by the Freundlich isotherm and follows the pseudo-second order kinetic model. Additionally, the data indicates that CNTs/kaolinite are highly recyclable, indicating that they would be a cost-effective material with substantial potential for water treatment.

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碳纳米管-高岭石复合材料高效去除甲基红染料的研制与优化

目前的工作涉及碳纳米管和高岭石的复合材料（CNTs/高岭石）的合成。该复合材料采用简单的蒸发干燥法合成。采用XRD、SEM-EDS、Sears法和点零电荷（pzc）等方法对合成的材料进行了表征。通过在合成材料上吸附去除甲基红染料，研究了合成材料的活性。考察了吸附剂用量、吸附时间、温度、pH等不同吸附参数和条件的影响。结果发现，在25℃下使用0.07 g合成的复合材料，最佳pH为5时，MR染料的去除率达到最佳。同时发现，在相同的吸附条件下，该染料对复合材料的去除效果优于单独使用高岭石和CNTs。MR染料在CNTs/高岭石复合材料上的吸附行为可以用Freundlich等温线很好地描述，并遵循准二级动力学模型。此外，数据表明碳纳米管/高岭石具有高度可回收性，这表明它们将是一种具有成本效益的材料，具有很大的水处理潜力。

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

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.