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Microwave assisted multiwall carbon nanotubes enhancing Cd(II) adsorption capacity in aqueous media

Mubarak, N. M. and Sahu, J. N. and Abdullah, E. C. and Jayakumar, N. S. and Ganesan, P. (2015) Microwave assisted multiwall carbon nanotubes enhancing Cd(II) adsorption capacity in aqueous media. Journal of Industrial and Engineering Chemistry, 24 . pp. 24-33. ISSN 1226-086X

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Official URL: http://dx.doi.org/10.1016/j.jiec.2014.09.005

Abstract

Novel multiwall carbon nanotubes (MWCNTs) have been successfully synthesized using tubular microwave chemical vapour deposition technique and proved to be an outstanding adsorbent for the removal of Cd(II) from aqueous solution. The effect of process parameters such as pH, MWCNTs dosage, agitation speed and time were investigated. The maximum adsorption capacities of Cd(II) were found to be 88.62 mg/g and a statistical analysis reveals that the optimum conditions for the highest removal (98%) of Cd(II) are at pH 5, MWCNTs dosage 0.1 g, agitation speed and time of 160 rpm and 50 min, respectively with the initial concentration of 10 mg/L. The Langmuir and Freundlich isotherm models match the experimental data very well and adsorption kinetic obeyed pseudo-second order. Our results proved that MWCNTs can be used as an effective Cd(II) adsorbent due to the high adsorption capacity as well as the short adsorption time needed to achieve equilibrium.

Item Type:Article
Uncontrolled Keywords:microwave, heavy metal, adsorption
Subjects:T Technology > T Technology (General)
Divisions:Malaysia-Japan International Institute of Technology
ID Code:58555
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 04:07
Last Modified:27 Oct 2021 08:43

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