期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2015
卷号：6
期号：8
页码：2045-2052
出版社：University of Mohammed Premier Oujda
摘要：The adsorption of victoria blue by a low cost activated carbon synthesized from agro waste lemon grass was investigated. Activated carbon was prepared in the atmosp here of nitrogen and then characterized by BET surface area, X-ray Diffraction, Fourier Transformation Infrared (FTIR) spectroscopy, and Scanning Electron Microscopy (SEM) . Removal o f the selected dye victoria blue (VB) onto lemon grass activated carbon (LG AC) was conducted. BET surface area of LGAC was found to be ~218 m 2 /g. Effect of initial concentration and contact time of d ye, pH and temperature on the removal was investigated. Alkaline pH range favoured removal of VB. Maximum removal of the dye was found to be 90% under optimum conditions. Kinetics of removal process has been studied and mass transfer coefficient and intra-particle diffusion constant were also determined for removal of the dye at different temperatures. Value of be rate constant for the removal was found to be 1.40×10 -2 min -1 at dye concentration of 1.53x10 -2 at 30 o C. Increasing the temperature increased the removal of the dye, indicating the endothermic nature of the process of removal. Langmuir and Freundlich isotherm constants were determined and revealed that LG AC is a proper adsorbent material for the removal of VB from aqueous solution
关键词：Activated carbon; adsorption; waste material; Victoria blue; isotherms
