期刊
CHEMICAL ENGINEERING JOURNAL
卷 132, 期 1-3, 页码 279-287出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2007.01.009
关键词
activated carbon; chemical activation; surface area; phenol adsorption
Porous carbon prepared from rice husk using phosphoric acid activation through precarbonization and chemical activation has been examined for the adsorption of phenol from aqueous solutions. The method adopted could produce carbons with micro and mesoporous structure. The surface area, pore volume and pore size distribution of carbon samples activated at three different temperatures 700, 800 and 900 degrees C have been carried out using nitrogen adsorption isotherms at 77 K. The production yield was observed to decrease with increase in activation temperature. Adsorption behavior of phenol onto the porous carbon was studied by varying the parameters such as agitation time, phenol concentration, pH and temperature. Studies showed that the adsorption decreased with increase in pH and temperature. The sorption process was found to be exothermic in nature. The kinetic models such as pseudo first order, pseudo second order and intra particle diffusion model were fitted to identify the mechanism of adsorption process. The isotherm data were fitted to Langnmir and Freundlich models. The maximum uptake of phenol was found to be 2.35 x 10(-4) mol/g at 20 degrees C and final pH 2.7. (c) 2007 Elsevier B.V.. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据