Document Details

Document Type : Article In Journal 
Document Title :
Simultaneous removal of copper(II), lead(II), zinc(II) and cadmium(II) from aqueous solutions by multi-walled carbon nanotubes
الإزالة المتزامنة لكل من النحاس (الثنائي) ، والرصاص (الثنائي) والزنك (الثنائي) والكادميوم (الثنائي) من المحاليل المائية بواسطة الأنابيب النانومترية الكربونية متعددة الجدران
 
Subject : Enviromental sciences 
Document Language : English 
Abstract : Multi-walled carbon nanotubes (MWCNTs) were used successfully for the removal of heavy metals from aqueous solution. Characterization techniques showed the carbon as nanotubes with an average diameter between 40 and 60 nm and a specific surface area of 61.5 m2 g1. The effect of carbon nanotubes mass, contact time, metal ions concentration, solution pH, and ionic strength on the adsorption of Cu(II), Pb(II), Cd(II) and Zn(II) by MWCNTs were studied and optimized. The adsorption of the heavy metals from aqueous solution by MWCNTs was studied kinetically using different kinetic models. A pseudo-second order model and the Elovich model were found to be in good agreement with the experimental data. The mechanism of adsorption was studied by the intra-particle diffusion model, and the results showed that intra-particle diffusion was not the slowest of the rate processes that determined the overall order. This model also revealed that the interaction of the metal ions with the MWCNTs surface might have been the most significant rate process. There was a competition among the metal ions for binding of the active sites present on the MWCNTs surface with affinity in the following order: Cu(II) > Zn(II) > Pb(II) > Cd(II).  2012 Acade´mie des sciences. Published by Elsevier Masson SAS. All rights reserved. 
ISSN : 1631-0748 
Journal Name : Comptes Rendus Chimie 
Volume : 15 
Issue Number : 5 
Publishing Year : 1433 AH
2012 AD 
Article Type : Article 
Added Date : Saturday, September 15, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
Mohamed Abdel SalamSalam, Mohamed AbdelResearcher masalam16@hotmail.com
Ghalia Al-ZhraniAl-Zhrani, Ghalia Researcher  
Samia A. KosaKosa, Samia A.Researcher  

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