低成本吸附剂甘蔗渣吸附碱性染料的平衡模型及动力学研究

M. Bashir, Chan C. Cheong, Ng Choon Aun, Salem S. Abu Amr
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引用次数: 5

摘要

本研究是为了检验甘蔗渣的有效性,甘蔗渣是马来西亚大量可用的一种农业废弃物,通过吸附从水溶液中去除碱性染料(如亚甲基蓝)。通过间歇式实验研究了摇速、接触时间、吸附剂投加量和ph对吸附性能的影响,并对平衡吸附等温线和动力学进行了研究。在最佳操作条件下,在200 rpm转速、6 h接触时间、0.2 g AC投加量的条件下,去色率分别为96.9和95.5。采用Langmuir和Freundlich吸附模型对实验数据进行了分析。吸附等温线与Langmuir等温线拟合较好。采用拟一阶、拟二阶方程和粒子内扩散方程对动力学数据进行了分析。实验数据与拟二阶动力学模型拟合较好,r2 > 0.99。因此,蔗渣驱动的活性炭吸附MB在纺织废水处理中具有很大的应用潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Equilibrium Modeling and Kinetic Studies on the Adsorption of Basic Dye by A low-Cost Adsorbent: Sugarcane Bagasse
This study was carried out to examine the effectiveness of sugarcane bagasse, an agricultural waste available in bulky quantity in Malaysia, to remove basic dye (e.g., methylene blue) from aqueous solution by adsorption. Batch mode experiments were carried out to study the effects of shaking speed, contact time, adsorbent dosage, and pH. Furthermore, equilibrium adsorption isotherms and kinetics were investigated. In the optimum operation condition, about 96.9 and 95.5 removal percentage of colour was obtained at 200 rpm shaking speed, 6 hr contact time and 0.2 g AC dosage. The experimental data were analyzed by the Langmuir, and Freundlich models of adsorption. The adsorption isotherm data were fitted well to Langmuir isotherm. The kinetic data has been analyzed using a pseudo-first-order, pseudo-second-order equation and intraparticle diffusion equation. The experimental data fitted very well the pseudo-second-order kinetic model with R 2 > 0.99. Consequently, the adsorption of MB onto the AC driven from sugarcane bagasse has a great potential to be used textile waste water treatment.
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