School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
J Hazard Mater. 2010 Apr 15;176(1-3):814-9. doi: 10.1016/j.jhazmat.2009.11.107. Epub 2009 Nov 26.
In this work, activated carbon was prepared from banana stalks (BSAC) waste to remove the insecticide carbofuran from aqueous solutions. The effects of contact time, initial carbofuran concentration, solution pH and temperature (30, 40 and 50 degrees C) were investigated. Adsorption isotherm, kinetics and thermodynamics of carbofuran on BSAC were studied. Equilibrium data were fitted to the Langmuir, Freundlich and Temkin isotherm models and the data best represented by the Langmuir isotherm. Thermodynamic parameters such as standard enthalpy (DeltaH(o)), standard entropy (DeltaS(o)) and standard free energy (DeltaG(o)) were evaluated. Regeneration efficiency of spent BSAC was studied using ethanol as a solvent. The efficiency was found to be in the range of 96.97-97.35%. The results indicated that the BSAC has good regeneration and reusability characteristics and can be used as alternative to present commercial activated carbon.
本工作以香蕉秸秆（BSAC）废弃物为原料制备活性炭，用于从水溶液中去除杀虫剂克百威。考察了接触时间、初始克百威浓度、溶液 pH 值和温度（30、40 和 50°C）的影响。研究了 BSAC 上克百威的吸附等温线、动力学和热力学。平衡数据拟合到 Langmuir、Freundlich 和 Temkin 等温模型，数据最好用 Langmuir 等温模型表示。评估了标准焓 (DeltaH(o))、标准熵 (DeltaS(o)) 和标准自由能 (DeltaG(o)) 等热力学参数。研究了乙醇作为溶剂对用过的 BSAC 的再生效率。发现效率在 96.97-97.35%范围内。结果表明，BSAC 具有良好的再生和重复使用特性，可替代现有商用活性炭。
