Please use this identifier to cite or link to this item:
Title: Carboxymethyl-β-cyclodextrin conjugated magnetic nanoparticles as nano-adsorbents for removal of copper ions: Synthesis and adsorption studies
Authors: Badruddoza, A.Z.M.
Tay, A.S.H.
Tan, P.Y.
Hidajat, K. 
Uddin, M.S. 
Keywords: Carboxymethyl-β-cyclodextrin
Copper adsorption
Kinetic model
Magnetic nanoparticles
Issue Date: 30-Jan-2011
Citation: Badruddoza, A.Z.M., Tay, A.S.H., Tan, P.Y., Hidajat, K., Uddin, M.S. (2011-01-30). Carboxymethyl-β-cyclodextrin conjugated magnetic nanoparticles as nano-adsorbents for removal of copper ions: Synthesis and adsorption studies. Journal of Hazardous Materials 185 (2-3) : 1177-1186. ScholarBank@NUS Repository.
Abstract: A novel nano-adsorbent, carboxymethyl-β-cyclodextrin modified Fe3O4 nanoparticles (CMCD-MNPs) is fabricated for removal of copper ions from aqueous solution by grafting CM-β-CD onto the magnetite surface via carbodiimide method. The characteristics results of FTIR, TEM, TGA and XPS show that CM-β-CD is grafted onto Fe3O4 nanoparticles. The grafted CM-β-CD on the Fe3O4 nanoparticles contributes to an enhancement of the adsorption capacity because of the strong abilities of the multiple hydroxyl and carboxyl groups in CM-β-CD to adsorb metal ions. The adsorption of Cu2+ onto CMCD-MNPs is found to be dependent on pH and temperature. Adsorption equilibrium is achieved in 30min and the adsorption kinetics of Cu2+ is found to follow a pseudo-second-order kinetic model. Equilibrium data for Cu2+ adsorption are fitted well by Langmuir isotherm model. The maximum adsorption capacity for Cu2+ ions is estimated to be 47.2mg/g at 25°C. Furthermore, thermodynamic parameters reveal the feasibility, spontaneity and exothermic nature of the adsorption process. FTIR and XPS reveal that Cu2+ adsorption onto CMCD-MNPs mainly involves the oxygen atoms in CM-β-CD to form surface-complexes. In addition, the copper ions can be desorbed from CMCD-MNPs by citric acid solution with 96.2% desorption efficiency and the CMCD-MNPs exhibit good recyclability. © 2010 Elsevier B.V.
Source Title: Journal of Hazardous Materials
ISSN: 03043894
DOI: 10.1016/j.jhazmat.2010.10.029
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Dec 1, 2021


checked on Nov 24, 2021

Page view(s)

checked on Dec 2, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.