Hameed B H, Krishni R R, Sata S A
School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
J Hazard Mater. 2009 Feb 15;162(1):305-11. doi: 10.1016/j.jhazmat.2008.05.036. Epub 2008 May 15.
In this paper, pineapple stem (PS) waste, an agricultural waste available in large quantity in Malaysia, was utilized as low-cost adsorbent to remove basic dye (methylene blue, MB) from aqueous solution by adsorption. Batch mode experiments were conducted at 30 degrees C to study the effects of initial concentration of methylene blue, contact time and pH on dye adsorption. Equilibrium adsorption isotherms and kinetic were investigated. The experimental data were analyzed by the Langmuir and Freundlich models and the isotherm data fitted well to the Langmuir isotherm with monolayer adsorption capacity of 119.05mg/g. The kinetic data obtained at different concentrations were analyzed using a pseudo-first-order and pseudo-second-order equation and intraparticle diffusion equation. The experimental data fitted very well the pseudo-second-order kinetic model. The PS was found to be very effective adsorbent for MB adsorption.
在本文中，菠萝茎（PS）废料作为马来西亚大量存在的一种农业废弃物，被用作低成本吸附剂，通过吸附作用从水溶液中去除碱性染料（亚甲基蓝，MB）。在30℃下进行了间歇模式实验，以研究亚甲基蓝初始浓度、接触时间和pH值对染料吸附的影响。研究了平衡吸附等温线和动力学。实验数据采用朗缪尔（Langmuir）和弗伦德利希（Freundlich）模型进行分析，等温线数据与朗缪尔等温线拟合良好，单层吸附容量为119.05mg/g。使用准一级和准二级方程以及颗粒内扩散方程对不同浓度下获得的动力学数据进行分析。实验数据与准二级动力学模型拟合得非常好。发现PS是用于吸附MB的非常有效的吸附剂。
