Adsorption of Different Dyes from Aqueous Solutions Using Organo-clay Compposites

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2020-12-01 DOI:10.22036/PCR.2020.234691.1787

Zakarya Baouch, Benabadji Kamel Ismet, B. Bouras

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引用次数: 2

Abstract

The structural evolution of cost-effective organo-clays, i.e. bentonite modified with various loadings of hexadecyltrimethylammonium bromide, from 50 to 200% of the cationic exchange capacity, was investigated. The materials BAS were prepared and then characterized by XRD, FTIR, and ATG/DTG analysis. The increase in the basal spacing, from 1.13 to 1.78 nm, was a sufficient confirmation that the surfactant cations were intercalated within the interlayer spaces of bentonite (BA). Batch adsorption experiments were performed to evaluate the adsorption efficiencies of Methylene Blue, Bezathren Red, and Telon Blue dyes on the surfactant-modified bentonite from an aqueous solution. In addition, the kinetic data were found to follow the pseudo second-order model for the adsorption processes of all three dyes. Afterwards, the equilibrium data were analyzed using the Langmuir and Freundlich isotherm models, and the Langmuir isotherm model turned out to be the most suitable to describe the adsorption of these dyes. It is worth indicating that the calculated Langmuir maximum adsorption capacities increased from 74 to 166.67 mg/g for Methylene Blue, from zero to 111.1 mg/g for Bezathren Red, and from zero to 500 mg/g for Telon Blue. The adsorption process was found to be endothermic in nature, in all cases.

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有机粘土复合载体对水溶液中不同染料的吸附

研究了具有成本效益的有机粘土的结构演变，即用不同负载量的十六烷基三甲基溴化铵改性的膨润土，阳离子交换容量为50-200%。制备了BAS材料，并通过XRD、FTIR和ATG/DTG分析对其进行了表征。基底间距从1.13纳米增加到1.78纳米，充分证实了表面活性剂阳离子嵌入膨润土（BA）的层间空间。进行了分批吸附实验，以评估亚甲基蓝、贝扎伦红和泰隆蓝染料在表面活性剂改性膨润土上的吸附效率。此外，发现所有三种染料的吸附过程的动力学数据都遵循伪二阶模型。然后，使用Langmuir和Freundlich等温线模型分析了平衡数据，结果表明Langmuir等温线模型最适合描述这些染料的吸附。值得指出的是，计算出的Langmuir最大吸附容量从74增加到166.67mg/g的亚甲蓝，从0增加到111.1mg/g的贝扎特伦红，以及从0到500mg/g的泰隆蓝。在所有情况下，吸附过程本质上都是吸热的。

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

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

期刊介绍： The motivation for this new journal is the tremendous increasing of useful articles in the field of Physical Chemistry and the related subjects in recent years, and the need of communication between Physical Chemists, Physicists and Biophysicists. We attempt to establish this fruitful communication and quick publication. High quality original papers in English dealing with experimental, theoretical and applied research related to physics and chemistry are welcomed. This journal accepts your report for publication as a regular article, review, and Letter. Review articles discussing specific areas of physical chemistry of current chemical or physical importance are also published. Subjects of Interest: Thermodynamics, Statistical Mechanics, Statistical Thermodynamics, Molecular Spectroscopy, Quantum Chemistry, Computational Chemistry, Physical Chemistry of Life Sciences, Surface Chemistry, Catalysis, Physical Chemistry of Electrochemistry, Kinetics, Nanochemistry and Nanophysics, Liquid Crystals, Ionic Liquid, Photochemistry, Experimental article of Physical chemistry. Mathematical Chemistry.