新型海藻酸衍生物酯对亚甲基蓝染料的吸附：动力学、等温线、热力学和机理研究。
New alginic acid derivatives ester for methylene blue dye adsorption: kinetic, isotherm, thermodynamic, and mechanism study.
机构信息
Laboratoire de Chimie Physique Macromoléculaire, Département de Chimie, Université Oran1 Ahmed Ben Bella, B.P 1524 El-Menaouer, 31000 Oran, Algeria.
Laboratoire de Chimie Physique Macromoléculaire, Département de Chimie, Université Oran1 Ahmed Ben Bella, B.P 1524 El-Menaouer, 31000 Oran, Algeria; Centre Universitaire Aflou, B.P 306 Aflou, Laghouat, Algeria.
出版信息
Int J Biol Macromol. 2022 Apr 30;205:651-663. doi: 10.1016/j.ijbiomac.2022.02.087. Epub 2022 Feb 22.
In this paper, the application of ester materials prepared by grafting different carbon chain lengths of diols in alginic acid (AA) by a simple, fast and efficient method for the adsorption of methylene blue (MB) is studied. The AA ester derivatives are characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), derivative thermogravimetry (DTG), scanning electron microscopy (SEM), atomic force microscopy (AFM), and Zeta potential before and after MB adsorption. This study shows a significant improvement in the adsorption capacity of MB by AA after its esterification with a Q value up to 454.545 mg/g for the best adsorbent "Poly(AA-g-EG)". The experimental data are studied according to two isothermal models (Langmuir and Freundlich) and two kinetic models (pseudo-second order and intra-particle diffusion). The adsorption of MB is also evaluated thermodynamically. An adsorption mechanism of MB is established.
本文研究了通过简单、快速、高效的方法将不同碳链长度的二醇接枝到海藻酸（AA）中制备的酯材料在吸附亚甲基蓝（MB）方面的应用。AA 酯衍生物通过傅里叶变换红外光谱（FTIR）、X 射线光电子能谱（XPS）、热重分析（TGA）、导数热重分析（DTG）、扫描电子显微镜（SEM）、原子力显微镜（AFM）和 Zeta 电位进行了表征，MB 吸附前后。研究表明，AA 酯化后，MB 的吸附容量显著提高，最佳吸附剂“聚（AA-g-EG）”的 Q 值高达 454.545 mg/g。根据两种等温模型（朗缪尔和弗伦德利希）和两种动力学模型（准二级和内扩散）研究了实验数据。还对 MB 的吸附进行了热力学评估。建立了 MB 的吸附机理。
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