Removal of methylene blue from aqueous solution by adsorption onto pineapple leaf powder.
Removal of methylene blue from aqueous solution by adsorption onto pineapple leaf powder.
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DOI：
10.1016/j.jhazmat.2009.04.080
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发表时间：
2009-10
影响因子：
13.6
通讯作者：
C. Weng;Yao-Tung Lin;Tai-Wei Tzeng
中科院分区：
文献类型：
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作者：
C. Weng;Yao-Tung Lin;Tai-Wei Tzeng
研究了菠萝叶粉（PLP）对亚甲基蓝（MB）的吸附性能。结果表明，吸附过程中存在颗粒内扩散，动力学数据符合准二级动力学方程。拟合参数表明，吸附速率随染料浓度的降低和离子强度的降低而增大，而搅拌速度对吸附没有显著影响。在较高的pH值和较低的温度下，吸附是有利的，平衡数据符合Langmuir等温线。当pH从3.5增加到9.5时，最大吸附量在4.68× 10− 4 ~ 9.28×10− 4 mol/g之间。热力学参数表明，吸附是一个典型的物理过程，自发的，放热的性质。结果表明，这种农业废弃物有可能被用作一种经济的吸附剂，用于去除亚甲基蓝的水溶液。
The ability of an unconventional bio-adsorbent, pineapple leaf powder (PLP) for the adsorption of methylene blue (MB) from aqueous solution was studied. It was observed that intra-particle diffusion was involved in the adsorption process and that the kinetic data fitted well with a pseudo-second-order equation. Fitting parameters revealed that the rate of adsorption increased with decrease in dye concentration and decrease in ionic strength while the mixing speed did not have a significant effect on adsorption. The adsorption was favorable at higher pH and lower temperature, and the equilibrium data were well fitted by the Langmuir isotherm. The maximum adsorption capacity varied from 4.68×10−4to 9.28×10−4mol/g when pH increases from 3.5 to 9.5. Thermodynamic parameters suggest that the adsorption is a typical physical process, spontaneous, and exothermic in nature. The results revealed that this agricultural waste has potential to be used as an economical adsorbent for the removal of methylene blue from aqueous solution.