title: Removal of bisphenol A from aqueous medium using molecularly surface imprinted microbeads.
abstract: The aim of this study is to prepare bisphenol A (BPA) imprinted polymers, which can be used for the selective removal of BPA from aqueous medium. The BPA-imprinted (MIP) and non-imprinted (NIP) microbeads were synthesized, and characterized by Zeta-sizer, FTIR, SEM and BET method. Bisphenol A was determined in solutions using liquid chromatography-mass spectroscopy (LC-MS). The effect of initial concentration of BPA, the adsorption rate and the pH of the medium on the capacity of BPA-imprinting polymer were studied. Adsorption capacity of BPA was affected by the amount of the incorporated functional monomer in the polymer network. BPA adsorption capacity of MIP-3 and NIP microbeads from aqueous medium was estimated as 76.7 and 59.9 mg g(-1), respectively. The binding efficiencies of BPA-MIP-3 microbeads for different phenolic compounds (i.e., BPA with p-toluidine, 4-aminophenol or 2-naphthol) were explored at binary solutions, and the binding capacities of BPA-imprinted microbeads were found to be 2.79 × 10(-1), 2.39 × 10(-1), 7.59 × 10(-2) and 5.48 × 10(-2) mmol g(-1) microbeads, respectively. The satisfactory results demonstrated that the obtained BPA-MIP microbeads showed an appreciable binding specificity toward BPA than similar structural compounds in the aqueous medium. Moreover, the reusability of BPA-MIP-3 microbeads was tested for several times and no significant loss in adsorption capacity was observed. Finally, the binary and multi-component systems results show that MIP-3 microbeads have special recognition selectivity and excellent binding affinity for template molecule "BPA".
authors.affiliation: Biochemical Processing and Biomaterial Research Laboratory, Gazi University, 06500, Ankara, Turkey; Department of Chemistry, Faculty of Sciences, Gazi University, 06500, Ankara, Turkey. Electronic address: g_bayramoglu@hotmail.com.
authors.forename: Gulay
authors.initials: G
authors.lastname: Bayramoglu
authors.affiliation: Biochemical Processing and Biomaterial Research Laboratory, Gazi University, 06500, Ankara, Turkey.
authors.forename: M Yakup
authors.initials: MY
authors.lastname: Arica
authors.affiliation: Biochemical Processing and Biomaterial Research Laboratory, Gazi University, 06500, Ankara, Turkey; Department of Chemistry, Faculty of Sciences, Gazi University, 06500, Ankara, Turkey.
authors.forename: Gorkem
authors.initials: G
authors.lastname: Liman
authors.affiliation: Hacettepe University, Department of Chemistry, 06800, Ankara, Turkey.
authors.forename: Omur
authors.initials: O
authors.lastname: Celikbicak
authors.affiliation: Hacettepe University, Department of Chemistry, 06800, Ankara, Turkey.
authors.forename: Bekir
authors.initials: B
authors.lastname: Salih
mesh_terms: D000327:Adsorption; D001559:Benzhydryl Compounds / Q000032:analysis*; D008863:Microspheres; D054802:Molecular Imprinting; D010316:Particle Size; D010636:Phenols / Q000032:analysis*; D011108:Polymers / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D010636:Phenols; D011108:Polymers; D014867:Water; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds
keywords: Adsorption; Bisphenol A; LC-MS; Molecular imprinting; Molecular recognition; Removal