Non-Covalent Assembly of Maghemite-Multiwalled Carbon Nanotubes for Efficient Lead Removal from Aqueous Solution
Syed F. Hasany A B , N. H. Abdurahman A , A. R. Sunarti A and Anuj Kumar A
+ Author Affiliations
- Author Affiliations
A Universiti Malaysia Pahang, 26300 Kuantan, Pahang, Malaysia.
B Corresponding author. Email: hasany_@live.co.uk
Australian Journal of Chemistry 66(11) 1440-1446 https://doi.org/10.1071/CH13281
Submitted: 1 June 2013 Accepted: 30 July 2013 Published: 23 August 2013
Abstract
Non-covalent assemblies of maghemite-embedded multiwalled carbon nanotubes (MWCNTs) were synthesised and characterised, and their applicability in the magnetic removal of PbII from aqueous solutions in batches was evaluated. The nanohybrids were prepared using a wet-chemical technique and characterised by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, zeta potential, vibrating sample magnetometer, and Brunauer–Emmett–Teller surface area measurements. Kinetics rate, adsorption isotherms, and effects of pH, contact time, adsorbent dosage, and agitation speed on PbII removal were studied. Results revealed maximum adsorption (~96 %, 24 ppm) was achieved in less than 2 h in a pH range of 6–7. Repeated adsorption–desorption cycles were conducted, which demonstrated that the nanohybrid could be used for prolonged cycles.
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