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研究了室温下竹炭对亚甲基蓝的吸附平衡和动力学,考察了亚甲基蓝初始浓度和吸附剂用量的影响。由Langmuir吸附等温模型、Freundlich吸附等温模型对吸附平衡数据进行拟合;动力学由准一级反应方程和准二级反应方程进行拟合。研究结果表明:Freundlich吸附等温线模型(R2=0.99)更为精确地描述了亚甲基蓝在竹炭上的吸附;吸附动力学由二级动力学模型拟合更为准确。对动力学数据进行了计算和讨论。
The adsorption equilibrium and kinetics of methylene blue to bamboo charcoal at room temperature were investigated. The effects of the initial concentration of methylene blue and the amount of adsorbent were investigated. The adsorption equilibrium data were fitted by Langmuir adsorption isotherm model and Freundlich adsorption isotherm model. The kinetics was fitted by quasi-first-order reaction equation and quasi-second-order reaction equation. The results showed that the Freundlich adsorption isotherm model (R2 = 0.99) described the adsorption of methylene blue on bamboo charcoal more accurately. The kinetics of adsorption was more accurately fitted by the second-order kinetic model. Kinetic data were calculated and discussed.