Synthesis and Characterization of Poly-Methacrylic Acid Grafted Chitosan-Bentonite Composite and its Application for Heavy Metals Recovery
Abstract
Poly-methacrylic acid grafted chitosan-bentonite nanocomposite (MACB) was synthesized by g-irradiation polymerization. The nanocomposite was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) crystallography, thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM). The MACB nanocomposite was employed for the adsorption of mercury, cadmium and lead ions from aqueous solution. The effect of various parameters such as pH, contact time, metal ion concentration and temperature on the adsorption of metal ions onto MACB nanocomposite was investigated. The experimental results indicated that the order of adsorption capacity of MACB nanocomposite for metal ions was as follows: Hg2+ > Pb2+ > Cd2+. The data indicating that the adsorption of the latter ions onto MACB nanocomposite followed both the Langmuir and Freundlich isotherm models. Equilibrium adsorption isotherm fitted the Langmuir model for Hg2+ ions and the adsorption of Cd2+ ions better fit the Freundlich isotherm model. The adsorption of Pb2+ ions followed both the Langmuir and Freundlich isotherm models.
Keywords: hydrogel; nanocomposites; clay; chitosan; ?-ray irradiation; Metal uptake
![Download the IISTE publication guideline!](https://www.iiste.org/sub/iiste_footer_journal.jpg)
To list your conference here. Please contact the administrator of this platform.
Paper submission email: CMR@iiste.org
ISSN (Paper)2224-3224 ISSN (Online)2225-0956
Please add our address "contact@iiste.org" into your email contact list.
This journal follows ISO 9001 management standard and licensed under a Creative Commons Attribution 3.0 License.
Copyright © www.iiste.org