Adsorption of Reactive Black 5 dye from aqueous solutions with a clay halloysite having a nanotubular structure: Interpretation of mechanism, kinetics, isotherm and thermodynamic parameters

IF 4.4 3区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR Inorganic Chemistry Communications Pub Date : 2024-11-21 DOI:10.1016/j.inoche.2024.113600
Feride Naime Türk , Muhammet Şakir Abdullah Eren , Hasan Arslanoğlu
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Abstract

In this study, the removal of Reactive Yellow 145 (RB5) dye found in wastewater with halloysite clay mineral (HCM), which is easily available and cheap, was investigated. For the characterization of the adsorbent; SEM, BET, XRD, and Zeta Potential Contact Angle analyses were performed. The effect of parameters such as solution pH, temperature, contact time, initial dye concentration, and adsorbent amount on the adsorption of RB5 dye onto HCM was investigated. It has been determined that the Langmuir isotherm fits the experimental data better than other applied isotherms in mathematically defining the adsorption equilibrium. In the Langmuir isotherm, the adsorption capacity was 24.9 mg/g. To find the most suitable kinetic model for the study using experimental data, Pseudo-First-Order, Pseudo-Second-Order, Elovich, and Intra-Particle Diffusion models were tested, and it was decided that the most suitable model would be the Pseudo-Second Order kinetic model. Again, using experimental data, thermodynamic parameters (ΔG°, ΔH°, ΔS°) were calculated, and it was determined that the adsorption process was spontaneous and endothermic.

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具有纳米管状结构的粘土埃洛石对水溶液中活性黑 5 染料的吸附:机理、动力学、等温线和热力学参数的解释
本研究调查了利用埃洛石粘土矿(HCM)去除废水中活性黄 145(RB5)染料的情况,埃洛石粘土矿易于获得且价格低廉。为了确定吸附剂的特性,对其进行了 SEM、BET、XRD 和 Zeta 电位接触角分析。研究了溶液 pH 值、温度、接触时间、初始染料浓度和吸附剂用量等参数对 HCM 吸附 RB5 染料的影响。结果表明,在数学定义吸附平衡方面,Langmuir 等温线比其他应用等温线更适合实验数据。在 Langmuir 等温线中,吸附容量为 24.9 毫克/克。为了利用实验数据找到最适合该研究的动力学模型,对伪一阶、伪二阶、埃洛维奇和颗粒内扩散模型进行了测试,最后确定最适合的模型是伪二阶动力学模型。同样,利用实验数据计算了热力学参数(ΔG°、ΔH°、ΔS°),并确定吸附过程是自发的、内热的。
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来源期刊
Inorganic Chemistry Communications
Inorganic Chemistry Communications 化学-无机化学与核化学
CiteScore
5.50
自引率
7.90%
发文量
1013
审稿时长
53 days
期刊介绍: Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.
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