期刊
CHEMICAL ENGINEERING JOURNAL
卷 171, 期 3, 页码 1246-1252出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2011.05.036
关键词
Waste activated sludge; Adsorption; POME; Methylene Blue
资金
- The Universiti Sains Malaysia [6035275, 814043]
Waste activated sludge (WAS) from palm oil mill effluent (POME) treatment plant was used to adsorb Methylene Blue (MB) in a batch system. The WAS was prepared at lower temperature compared to the previous studies. Parameters such as initial MB concentration, pH, and temperature were studied for their effects on the adsorption process. Results showed that the uptake of MB increased with an increase in both the initial MB concentration and the pH. and decreased with an increase in temperature. Both the Langmuir and the Freundlich Isotherms are fit to explain the MB adsorption on WAS. The maximum monolayer adsorption capacity of WAS was found to be 66.23 mg/g at 30 degrees C. The kinetic data for this study fit well the pseudo-second-order kinetic with a R-2 more than 0.95. Thermodynamic analysis was performed by evaluating the Gibbs Free Energy (Delta G degrees), enthalpy (Delta H degrees), and entropy (Delta S degrees) of the process. The evaluation showed that the MB adsorption process onto WAS is an exothermic process and is spontaneous in nature. Hence, this work reveals that the use of POME WAS is an innovative application of a local waste product as an adsorbent for MB removal. (C) 2011 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