Journal
CARBOHYDRATE POLYMERS
Volume 147, Issue -, Pages 45-52Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.03.080
Keywords
Chitosan; Silver nanoparticles; Nanocomposite film; Solid phase extraction; Sorbent; Trace metals; Surface waters
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Funding
- Sofia University St. Kliment Ohridski [137/2014]
- Department of Science & Technology (DST), Government of India
- Ministry of Education, Youth & Science (MEYS), Government of Bulgaria through Indo-Bulgarian Joint Research Project Grant [INT/Bulgaria/P-10/12]
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The present study describes the ecofriendly method for the preparation of chitosan film loaded with silver nanoparticles (CS-AgNPs) and application of this film as efficient sorbent for separation and enrichment of Al(III), Cd(II), Cu(II), Co(II), Fe(III), Ni(II), Pb(II) and Zn(II). The stable CS-AgNPs colloid was prepared by dispersing the AgNPs sol in chitosan solution at appropriate ratio and further used to obtain a cast film with very good stability under storage and good mechanical strength for easy handling in aqueous medium. The incorporation of AgNPs in the structure of CS film and interaction between the polymer matrix and nanoparticles were confirmed by UV-vis and FTIR spectroscopy. The homogeneously embedded AgNPs (average diameter 29 nm, TEM analysis) were clearly observed throughout the film by SEM. The CS-AgNPs nanocomposite film shows high sorption activity toward trace metals under optimized chemical conditions. The results suggest that the CS-AgNPs nanocomposite film can be feasibly used as a novel sorbent material for solid-phase extraction of metal pollutants from surface waters. (C) 2016 ElsevierLtd. All rights reserved.
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