Comparative kinetic study of functionalized carbon nanotubes and magnetic biochar for removal of Cd2+ ions from wastewater

Ruthiraan, M. and Mubarak, N.M. and Thines, R.K. and Abdullah, E.C. and Sahu, J.N. and Jayakumar, N.S. and Ganesan, P. (2015) Comparative kinetic study of functionalized carbon nanotubes and magnetic biochar for removal of Cd2+ ions from wastewater. Korean Journal of Chemical Engineering, 32 (3). pp. 446-457. ISSN 0256-1115, DOI https://doi.org/10.1007/s11814-014-0260-7.

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Abstract

We did a comparative study between functionalized multiwall carbon nanotube (FMWCNTs), and magnetic biochar was carried out to determine the most efficient adsorbent to be employed in the Cd2+ ion removal. We optimized parameters such as agitation speed, contact time, pH and adsorbent dosage using design expert vrsion 6.08. The statistical analysis reveals that optimized condition for highest removal of Cd2+ are at pH 5.0, with dosage 1.0 g, agitation speed and contact time of 100 rpm and 90 minutes, respectively. For the initial concentration of 10mg/l, the removal efficiency of Cd2+ using FMWCNTs was 90 and and 82 of magnetic biochar. The maximum Cd2+ adsorption capacities of both FMWCNTs and magnetic biochar were calculated: 83.33mg/g and 62.5mg/g. The Langmuir and Freundlich constants for FMWCNTs were 0.056 L/mg and 13.613 L/mg, while 0.098 L/mg and 25.204 L/mg for magnetic biochar. The statistical analysis proved that FMWCNTs have better adsorption capacity compared to magnetic biochar and both models obeyed the pseudo-second-order.

Item Type:	Article
Funders:	University of Malaya, Ministry of Higher Education High Impact Research UM.C/HIR/MOHE/ ENG/20
Additional Information:	Cd5ev Times Cited:0 Cited References Count:53
Uncontrolled Keywords:	Mwcnt, cadmium, heavy metal, adsorption, functionalization, magnetic biochar, aqueous-solution, adsorption sites, technology, desorption, cadmium, pb(ii), pb2+,
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery T Technology > TP Chemical technology
Divisions:	Faculty of Engineering
Depositing User:	Mr Jenal S
Date Deposited:	17 Sep 2015 04:05
Last Modified:	17 Sep 2015 04:05
URI:	http://eprints.um.edu.my/id/eprint/13943

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