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首页> 外文期刊>Journal of Chemical and Engineering Data: the ACS Journal for Data >Evaluation of Adsorption Characteristics of Multiwalled Carbon Nanotubes Modified by a Poly(propylene imine) Dendrimer in Single and Multiple Dye Solutions: Isotherms, Kinetics, and Thermodynamics
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Evaluation of Adsorption Characteristics of Multiwalled Carbon Nanotubes Modified by a Poly(propylene imine) Dendrimer in Single and Multiple Dye Solutions: Isotherms, Kinetics, and Thermodynamics

机译：聚丙烯亚胺树枝状大分子修饰的多壁碳纳米管在单染料和多染料溶液中的吸附特性评价：等温线，动力学和热力学

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This research investigates the isotherm, kinetics, and thermodynamic parameters of the adsorption of two direct dyes in single and multiple dye solutions onto the modified multiwalled carbon nanotubes using poly(propylene imine) dendrimer (CNT-Den). The surface morphology and functional groups of the prepared CNT-Den were studied using field emission scanning electron microscopy (FESEM) images and Fourier transform infrared (FTIR) spectra, respectively. The Langmuir, Freundlich, and Tempkin isotherms were studied, and the results indicated that the data followed the Langmuir isotherm. The kinetic studies revealed that the pseudo-second order model was best fitted to our results rather than pseudo-first and intraparticle diffusion model. The calculated thermodynamic parameters showed the endothermic and spontaneous nature of the adsorption process. The overall results illustrated that CNT-Den can be effectively used as an adsorbent for the removal of dyes from colored wastewaters especially textile effluents.
机译：这项研究调查的等温线，动力学和热力学参数的两种直接染料在单一和多种染料溶液中吸附到改性的多壁碳纳米管上使用聚丙烯亚胺树枝状聚合物（CNT-Den）的吸附。分别使用场发射扫描电子显微镜（FESEM）图像和傅立叶变换红外（FTIR）光谱研究了制备的CNT-Den的表面形态和官能团。对Langmuir，Freundlich和Tempkin等温线进行了研究，结果表明数据遵循Langmuir等温线。动力学研究表明，伪二级模型最适合我们的结果，而不是伪一级和粒子内扩散模型。计算得到的热力学参数显示了吸附过程的吸热和自发性质。总体结果表明，CNT-Den可以有效地用作吸附剂，用于从有色废水（尤其是纺织废水）中去除染料。

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