Individual-and-competitive-adsorption-of-phenol-and-nickel-onto-multiwalled-carbon-nanotubes.pdf

Journal of Advanced Research (2015) 6, 405–415Cairo University Journal of Advanced ResearchORIGINAL ARTICLEIndividual and competitive adsorption of phenol and nickel onto multiwalled carbon nanotubes* Corresponding author. Tel.: +20 1006700375; fax: +20 235676501. E-mail address: noureta2002@ (N.T. Abdel-Ghani). Peer review under responsibility of Cairo University. Production and hosting by Elsevier 2090-1232 a 2014 Production and hosting by Elsevier B.V. on behalf of Cairo University. /10.1016/j.jare.2014.06.001Nour T. Abdel-Ghani a,*, Ghadir A. El-Chaghaby b, Farag S. Helal ca Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt b RCFF, Agricultural Research Center, Giza, Egypt c Science Technology Center of Excellence, Ministry of Military Production, Cairo, EgyptA R T I C L E I N F O A B S T R A C TArticle history: Received 31 March 2014 Received in revised form 29 May 2014 Accepted 1 June 2014 Available online 6 June 2014 Keywords: Adsorption Carbon nanotubes Nickel Phenols Equilibrium modelingIndividual and competitive adsorption studies were carried out to investigate the removal of phenol and nickel ions by adsorption onto multiwalled carbon nanotubes (MWCNTs). The carbon nanotubes were characterized by different techniques such as X-ray diffraction, scanning electron microscopy, thermal analysis and Fourier transformation infrared spectroscopy. The different experimental conditions affecting the adsorption process were investigated. Kinetics and equilibrium models were tested for fitting the adsorption experimental data. The character- ization experimental results proved that the studied adsorbent possess different surface func- tional groups as well as typical morphological features. The batch experiments revealed that 300 min of contact time was enough to achieve equilibrium for the adsorption of both phenol and nickel at an initial adsorbate concentration of 25 mg/l, an adsorbent dosage of 5 g/l, and a solution pH of 7. The adsorption