Msaad Asmaa, Belbahloul Mounir, El Hajjaji Samir, Zouhri Abdeljalil
Laboratory of Applied Chemistry and Environment, Faculty of Science and Technology, University Hassan First, BP 577, Settat 26000, Morocco E-mail:
School of Science & Engineering, Al Akhawayn University in Ifrane, Hassan II Avenue, Ifrane 53000, Morocco.
Water Sci Technol. 2018 Dec;78(10):2055-2063. doi: 10.2166/wst.2018.481.
In this work, the use of a novel low-cost adsorbent derived from Ziziphus lotus (ZL) and industrial carbon (IC) has been successfully applied to the removal of methylene blue (MB) from aqueous solutions. The efficiency of this material was studied through Lagergren pseudo-first-order and pseudo-second-order kinetic models. The process for the novel activated carbon and the IC were best represented by the pseudo-second-order rate model. Langmuir and Freundlich isotherms were used to describe the sorption equilibrium data. The Langmuir model turned out to be the most adequate and maximum capacities were measured to be 833.33 and 142.85 mg.g for ZL activated carbon and IC from Sigma Aldrich, respectively. The thermodynamic study revealed that the sorption process is spontaneous and endothermic for the two adsorbents. To explain the effectiveness of MB removal, ZL activated carbon was characterized by scanning electron microscopy, Brunauer-Emmett-Teller surface area, X-ray diffraction and Fourier transform infrared spectroscopy.
在这项工作中，一种由莲雾（ZL）和工业碳（IC）衍生的新型低成本吸附剂已成功应用于从水溶液中去除亚甲基蓝（MB）。通过 Lagergren 准一级和准二级动力学模型研究了该材料的效率。新型活性炭和 IC 的过程最适合用准二级速率模型表示。使用 Langmuir 和 Freundlich 等温线来描述吸附平衡数据。结果表明，Langmuir 模型最为合适，测得莲雾活性炭和 Sigma Aldrich 的 IC 的最大吸附容量分别为 833.33 和 142.85 mg/g。热力学研究表明，两种吸附剂的吸附过程都是自发的且吸热的。为了解释 MB 去除的有效性，通过扫描电子显微镜、Brunauer-Emmett-Teller 表面积、X 射线衍射和傅里叶变换红外光谱对莲雾活性炭进行了表征。
