Optimization of activated carbon fiber preparation from Kenaf using K₂HPO₄ as chemical activator for adsorption of phenolic compounds

详细信息    查看全文

• 作者：Soheil Aber ; Alireza Khataee ; Mohsen Sheydaei
• 关键词：Isotherm ; Kinetics ; Phenol ; p-Nitrophenol ; Taguchi
• 刊名：Bioresource Technology
• 出版年：2009
• 出版时间：December 2009
• 年：2009
• 卷：100
• 期：24
• 页码：6586-6591
• 全文大小：228 K

文摘

The present work reports the preparation of activated carbon fiber (ACF) from Kenaf natural fibers. Taguchi experimental design method was used to optimize the preparation of ACF using K₂HPO₄. Optimized conditions were: carbonization at 300 °C, impregnation with 30 %  w/v K₂HPO₄ solution and activation at 700 °C for 2 h with the rate of achieving the activation temperature equal to 2 °C min⁻¹. The surface characteristics of the ACF prepared at optimized conditions were also studied using pore structure analysis, scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectroscopy. Pore structure analysis shows that micropores constitute the most of the porosity of the prepared ACF. The ability of the ACF prepared at optimized conditions to adsorb phenol and p-nitrophenol from aqueous solution was also investigated. The equilibrium data of phenol and p-nitrophenol adsorption on the prepared ACF were well fitted to the Langmuir isotherm. The maximum adsorption capacities of phenol and p-nitrophenol on the prepared ACF are 140.84 and 136.99 mg g⁻¹, respectively. The adsorption process follows the pseudo-first-order kinetic model.