羧酸基功能化多壁碳纳米管对甲基橙染料的吸附研究

IF 1.2 Q4 NANOSCIENCE & NANOTECHNOLOGY

international journal of nano dimension Pub Date : 2015-07-01 DOI:10.7508/IJND.2015.03.002

R. Mostafa, O. Moradi, A. Mazlomifar

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引用次数: 21

摘要

研究了羧酸基功能化多壁碳纳米管(MWCNT - COOH)吸附剂在去除水中甲基橙(MO)染料中的应用前景。研究了pH、振荡时间和温度对吸附量的影响;在298℃~ 338℃范围内考察温度对吸附过程的影响。结果表明，甲基橙的去除率随接触时间的增加而增加，随pH和温度的升高而降低。甲基橙染料的平衡数据最符合Langmuir等温线模型。用红外光谱和扫描电镜对吸附剂进行了表征。拟二级动力学模型与Elovich模型、拟一级动力学模型和颗粒内扩散动力学吸附模型相比拟合效果更好。

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Adsorption of Methyl orange dye from Water solutions by carboxylate group functionalized multi-walled Carbon nanotubes

The present study was carried out to investigate the potential of carboxylate group functionalized Multi-walled carbon nanotubes (MWCNT−COOH) adsorbent for the removal of Methyl orange (MO) textile dye from aqueous solutions. The effects of pH, shaking time and temperature on adsorption capacity were studied; the contact time to obtain equilibrium at 298 ˚K was fixed at 25 min. The effect of temperature on adsorption process was evaluated from 298 to 338 ˚K. Results showed that removal of Methyl orange increased with increasing contact time and decreased with increasing pH and temperature. For Methyl orange dye, the equilibrium data were best fitted to The Langmuir isotherm model. The adsorbent was characterized by infrared spectroscopy, and scanning electron microscopy. The pseudo-secondorder kinetic model provided the best fit to the experimental data compared with The Elovich or pseudo-first-order or intra-particle diffusion kinetic adsorption models.

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来源期刊

international journal of nano dimension NANOSCIENCE & NANOTECHNOLOGY-

CiteScore

2.80

自引率

20.00%

发文量