title: Preconcentration of phosphate ion onto ion-imprinted polymer.
abstract: In this study, selective separation and preconcentration of phosphate ions on the phosphate-imprinted chitosan-succinate beads have investigated. Chitosan-succinate, phosphate, epichlorohydrin were used as the complexing monomer, template and crosslinking agent, respectively. In the first step, chitosan was modified with succinic anhydrides and complex formation occurred between carboxylic acid functional groups and iron(III) ions. Secondly, Fe(III)-chitosan-succinate particles were reacted with phosphate ions. Afterwards, particles were crosslinked with epichlorohydrin and the template (phosphate ions) was removed using 1M KOH solution. Selective cavity for the phosphate ion was obtained in the phosphate-imprinted metal-chelate polymer. These phosphate-imprinted metal-chelate polymer was used in the adsorption-desorption process. The adsorption process was fast and equilibrium was reached around 30 min. The adsorption behaviour of this system was described approximately by the Langmuir equation. Percent extraction, distribution ratio and selectivity coefficients of phosphate and other ions using non-imprinted and phosphate-imprinted polymer were also determined and comparison of these data was reported.
authors.affiliation: Department of Chemistry, Eskişehir Osmangazi University, Eskişehir, Turkey. ebirlik@ogu.edu.tr
authors.forename: Ebru Birlik
authors.initials: EB
authors.lastname: Ozkütük
authors.forename: Arzu
authors.initials: A
authors.lastname: Ersöz
authors.forename: Adil
authors.initials: A
authors.lastname: Denizli
authors.forename: Ridvan
authors.initials: R
authors.lastname: Say
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D007700:Kinetics; D010710:Phosphates / Q000302:isolation & purification*; D017550:Spectroscopy, Fourier Transform Infrared; D014876:Water Pollution / Q000517:prevention & control*
chemical_list: D005290:Ferric Compounds; D010710:Phosphates; C119690:chitosan succinate; D048271:Chitosan