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Statistical optimization and kinetic studies on removal of Zn2+ using functionalized carbon nanotubes and magnetic biochar

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Authors
Mujawar, Mubarak
Alicia, R.
Abdullah, E.
Sahu, J.
Haslija, A.
Tan, J.
Date
2013
Type
Journal Article

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Mujawar, M. and Alicia, R. and Abdullah, E. and Sahu, J. and Haslija, A. and Tan, J. 2013. Statistical optimization and kinetic studies on removal of Zn2+ using functionalized carbon nanotubes and magnetic biochar. Journal of Environmental Chemical Engineering. 1 (3): pp. 486-495.
Source Title
Journal of Environmental Chemical Engineering
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Curtin Malaysia
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Abstract

A comparative study on the adsorption capacity of functionalized carbon nanotubes (CNTs) and magnetic biochar for the removal of Zn 2+ was investigated. Statistical analysis revealed that the optimum conditions for the highest removal of Zn 2+ are at pH 10, dosage 0.09 g, agitation speed and time of 120 rpm and 120 min respectively. The removal efficiency of Zn 2+ for an initial concentration of 1.1 mg/L using functionalized CNT was 99% and using magnetic biochar was 75%. The maximum adsorption capacities of 1.05 and 1.18 mg/g for functionalized CNT and magnetic biochar respectively. The adsorption isotherms are well described by both Langmuir and Freundlich models and adsorption kinetic obeyed pseudo-second order.