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首页> 外文期刊>Journal of Hazardous Materials >Adsorption of methylene blue onto bamboo-based activated carbon: Kinetics and equilibrium studies
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Adsorption of methylene blue onto bamboo-based activated carbon: Kinetics and equilibrium studies

机译：竹基活性炭对亚甲基蓝的吸附：动力学和平衡研究

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Bamboo, an abundant and inexpensive natural resource in Malaysia was used to prepare activated carbon by physiochemical activation with potassium hydroxide (KOH) and carbon dioxide (CO_2) as the activating agents at 850 ℃ for 2 h. The adsorption equilibrium and kinetics of methylene blue dye on such carbon were then examined at 30 ℃. Adsorption isotherm of the methylene blue (MB) on the activated carbon was determined and correlated with common isotherm equations. The equilibrium data for methylene blue adsorption well fitted to the Langmuir equation, with maximum monolayer adsorption capacity of 454.2 mg/g. Two simplified kinetic models including pseudo-first-order and pseudo-second-order equation were selected to follow the adsorption processes. The adsorption of methylene blue could be best described by the pseudo-second-order equation. The kinetic parameters of this best-fit model were calculated and discussed.
机译：竹子是马来西亚丰富而廉价的自然资源，被用来在850℃下以氢氧化钾（KOH）和二氧化碳（CO_2）为活化剂通过物理化学活化法制备活性炭2 h。然后在30℃下考察了亚甲基蓝染料在此类碳上的吸附平衡和动力学。确定了亚甲基蓝（MB）在活性炭上的吸附等温线，并与常见的等温线方程式相关联。亚甲基蓝吸附的平衡数据很好地符合Langmuir方程，最大单层吸附容量为454.2 mg / g。选择了两个简化的动力学模型，包括拟一级方程和拟二级方程以遵循吸附过程。亚甲基蓝的吸附最好用拟二阶方程描述。计算并讨论了该最佳拟合模型的动力学参数。

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