title: Chitosan film loaded with silver nanoparticles-sorbent for solid phase extraction of Al(III), Cd(II), Cu(II), Co(II), Fe(III), Ni(II), Pb(II) and Zn(II).
abstract: 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 29nm, 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.
authors.affiliation: Department of General and Inorganic Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia "St. Kliment Ohridski", 1 James Bourchier blvd., Sofia, Bulgaria; Department of Analytical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia "St. Kliment Ohridski", 1 James Bourchier blvd., Sofia, Bulgaria. Electronic address: lubomirdjerahov@abv.bg.
authors.forename: Lubomir
authors.initials: L
authors.lastname: Djerahov
authors.affiliation: Department of General and Inorganic Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia "St. Kliment Ohridski", 1 James Bourchier blvd., Sofia, Bulgaria. Electronic address: nhpv@wmail.chem.uni-sofia.bg.
authors.forename: Penka
authors.initials: P
authors.lastname: Vasileva
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia "St. Kliment Ohridski", 1 James Bourchier blvd., Sofia, Bulgaria. Electronic address: karadjova@chem.uni-sofia.bg.
authors.forename: Irina
authors.initials: I
authors.lastname: Karadjova
authors.affiliation: Environmental Geochemistry, National Geophysical Research Institute (Council of Scientific & Industrial Research), Uppal Road, Hyderabad 500007, India. Electronic address: krngri@rediffmail.com.
authors.forename: Rama Mohan
authors.initials: RM
authors.lastname: Kurakalva
authors.affiliation: Environmental Geochemistry, National Geophysical Research Institute (Council of Scientific & Industrial Research), Uppal Road, Hyderabad 500007, India. Electronic address: keshav_aradhi@rediffmail.com.
authors.forename: Keshav Krishna
authors.initials: KK
authors.lastname: Aradhi
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D004785:Environmental Pollutants / Q000737:chemistry / Q000302:isolation & purification; D008670:Metals / Q000737:chemistry / Q000302:isolation & purification*; D053758:Nanoparticles / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation*
chemical_list: D004785:Environmental Pollutants; D008670:Metals; D012834:Silver; D048271:Chitosan
keywords: Chitosan; Nanocomposite film; Silver nanoparticles; Solid phase extraction; Sorbent; Surface waters; Trace metals