Hameed B H, El-Khaiary M I
School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia.
J Hazard Mater. 2008 Sep 15;157(2-3):344-51. doi: 10.1016/j.jhazmat.2007.12.105. Epub 2008 Jan 6.
In this work, the adsorption of malachite green (MG) was studied on activated carbon prepared from bamboo by chemical activation with K(2)CO(3) and physical activation with CO(2) (BAC). Adsorption studies were conducted in the range of 25-300 mg/L initial MG concentration and at temperature of 30 degrees C. The experimental data were analyzed by the Freundlich isotherm, the Langmuir isotherm, and the multilayer adsorption isotherm. Equilibrium data fitted well with the Langmuir model with maximum adsorption capacity of 263.58 mg/g. The rates of adsorption were found to confirm to pseudo-second-order kinetics with good correlation and the overall rate of dye uptake was found to be controlled by pore diffusion throughout the entire adsorption period. The results indicate that the BAC could be used to effectively adsorb MG from aqueous solutions.
在本研究中，对用碳酸钾化学活化和二氧化碳物理活化制备的竹基活性炭（BAC）对孔雀石绿（MG）的吸附进行了研究。吸附研究在初始MG浓度为25 - 300 mg/L的范围内以及30℃的温度下进行。实验数据通过Freundlich等温线、Langmuir等温线和多层吸附等温线进行分析。平衡数据与Langmuir模型拟合良好，最大吸附容量为263.58 mg/g。吸附速率符合伪二级动力学，相关性良好，并且发现在整个吸附期间染料摄取的总速率受孔扩散控制。结果表明，BAC可用于有效吸附水溶液中的MG。
