Pseudo-second-orders kinetic equations for modeling adsorption systems for removal of lead ions using multi-walled carbon nanotube

被引：385

作者：

Robati D. ^{[1
]}

机构：

[1] Department of Chemistry, Eslamshahr Branch, Islamic Azad University, Eslamshahr

来源：

Journal of Nanostructure in Chemistry | 2013年 / 3卷 / 1期

关键词：

Kinetics models; Multi-walled carbon nanotube; Oxidized multi-walled carbon nanotubes; Pb(II) ions; Removal;

D O I：

10.1186/2193-8865-3-55

中图分类号：

学科分类号：

摘要：

This study investigated the lead ion removal of the multi-walled carbon nanotubes (MWCNTs) and oxidized multi-walled carbon nanotubes (MWCNT-COOH). The main purpose of this work is to study the possibilities on the removal of Pb(II) ions from aqueous solutions using MWCNTs and MWCNT-COOH surfaces as adsorbents. Removal of Pb(II) ions was investigated using solutions with different concentrations in the range 10 to 100 mg/L. In this study, removal of Pb(II) ions on surfaces has been investigated by atomic absorption spectrophotometry. The microstructure of carbon nanotubes were characterized using scanning electron microscopy. Three different kinetic theories were applied to experimental data. The kinetic rates were modeled using the pseudo-first-order, four-type linear pseudo-second-order, and intraparticle diffusion. The pseudo-second-order model was found to explain the adsorption kinetics most effectively. The results indicated a significant potential of the multi-walled carbon nanotube as an adsorbent for Pb(II) ion removal. © 2013, Robati; licensee Springer.

引用

共 20 条

[1]

Cho H.H., Wepasnick K., Smith B.A., Bangash F.K., Fairbrother D.H., Ball W.P., Ball W.P., Sorption of aqueous Zn[II] and Cd[II] by multiwall carbon nanotubes: the relative roles of oxygen-containing functional groups and graphenic carbon, Langmuir, 26, pp. 967-981, (2010)

[2]

Hyung H., Kim J.H., Natural organic matter (NOM) adsorption to multi walled carbon nanotubes: effect of NOM characteristics and water quality parameters, Environ. Sci. Technol, 42, pp. 4416-4421, (2008)

[3]

Xu D., Tan X., Chen C.L., Wang X.K., Removal of Pb(II) from aqueous solution by oxidized multiwalled carbon nanotubes, J. Hazard. Mater, 154, pp. 407-416, (2008)

[4]

Sheng G.D., Li J.X., Shao D.D., Hu J., Chen C.L., Chen Y., Wang X., Adsorption of copper(II) on multiwalled carbon nanotubes in the absence and presence of humic or fulvic acids, J. Hazard. Mater, 178, pp. 333-340, (2010)

[5]

Schierz A., Zaenker H., Aqueous suspensions of carbon nanotubes: surface oxidation, colloidal stability and uranium sorption, Environ. Pollut, 157, pp. 1088-1094, (2009)

[6]

Giannakopoulos E., Christoforidis K.C., Tsipis A., Jerzykiewicz M., Deligiannakis Y., Influence of Pb(II) on the radical properties of humic substances and model compounds, J. Phys. Chem. A, 109, pp. 2223-2232, (2005)

[7]

Sadeghian Z., Large-scale production of multi-walled carbon nanotubes by low cost spray pyrolysis of hexane, New. Carbon. Mater, 24, pp. 33-38, (2009)

[8]

Shao D., Hu J., Wang X., Plasma induced grafting multiwalled carbon nanotube with chitosan and its application for removal of UO22+, Cu2+, and Pb2+ from aqueous solutions, Plasma. Process. Polym, 7, pp. 977-985, (2010)

[9]

Wang P., Shi Q.H., Liang H.J., Steuerman D.W., Stucky G.D., Keller A.A., Enhanced environmental mobility of carbon nanotubes in the presence of humic acid and their removal from aqueous solution, Small, 4, pp. 2166-2170, (2008)

[10]

Ren X.M., Chen C.L., Nagatsu M., Wang X.K., Carbon nanotubes as adsorbents in environmental pollution management: a review, Chem. Eng. J, 170, pp. 395-410, (2011)

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