Adsorptive Removal of Copper and Nickel Ions from Water Using Chitosan Coated PVC Beads

Department of Chemistry, Biopolymers and Thermophysical Laboratory, Sri Venkateswara University, Tirupati, Andra Pradesh, India.
Bioresource Technology (Impact Factor: 4.49). 08/2008; 100(1):194-9. DOI: 10.1016/j.biortech.2008.05.041
Source: PubMed


A new biosorbent was developed by coating chitosan, a naturally and abundantly available biopolymer, on to polyvinyl chloride (PVC) beads. The biosorbent was characterized by FTIR spectra, porosity and surface area analyses. Equilibrium and column flow adsorption characteristics of copper(II) and nickel(II) ions on the biosorbent were studied. The effect of pH, agitation time, concentration of adsorbate and amount of adsorbent on the extent of adsorption was investigated. The experimental data were fitted to Langmuir and Freundlich adsorption isotherms. The data were analyzed on the basis of Lagergren pseudo first order, pseudo-second order and Weber-Morris intraparticle diffusion models. The maximum monolayer adsorption capacity of chitosan coated PVC sorbent as obtained from Langmuir adsorption isotherm was found to be 87.9 mg g(-1) for Cu(II) and 120.5 mg g(-1) for Ni(II) ions, respectively. In addition, breakthrough curves were obtained from column flow experiments. The experimental results demonstrated that chitosan coated PVC beads could be used for the removal of Cu(II) and Ni(II) ions from aqueous medium through adsorption.

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    • "The interaction depends (Ng et al. 2003; Dzul Erosa et al. 2001) on the metal ions and initial pH of the medium. The chemical stability of chitosan is enhanced by several techniques such as cross linking (Du et al. 2009) carboxymethylation (Xu et al. 2009) grafting (Morimoto et al. 2002) blending (Wang and Kuo 2008; Ngah et al. 2004) coating (Popuri et al. 2009) and sulphonation (Holme and Perlin 1997). Among all the techniques cross linking is mainly focused because of its simple procedure and there are enormous opportunities to form macromolecular super structures for various specific applications (Crini 2005). "
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    Full-text · Article · Nov 2015
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    • "mmol/g [20]. Furthermore, the maximum adsorption capacity of chitosan-coated PVC sorbent reached 87.9 mg/g for Cu(II) ions [21]. Also, sorption behaviour of chemically modified and acrylamide grafted chitosan for Cu(II) removal [22−24] has been studied. "
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    • "Previous studies were made on chitosan support material, which includes sand [14], bentonite [19] [20] [21], PVC [6], and perlite [22]. Montmorillonite, a smectite clay mineral composed of three layers, has a 2:1 ratio of Si 4+ tetrahedral to Al 3+ octahedral sheets. "
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