title: Removal of dorzolamide from biomedical wastewaters with adsorption onto graphite oxide/poly(acrylic acid) grafted chitosan nanocomposite.
abstract: A novel graphite oxide/poly(acrylic acid) grafted chitosan nanocomposite (GO/CSA) was prepared and used as biosorbent for the removal of pharmaceutical compound (dorzolamide) from biomedical synthetic wastewaters. The performance was evaluated taking into account pH, kinetics and thermodynamics of adsorption. GO/CSA presented higher adsorption capacity in comparison with the parent materials (graphite oxide and poly(acrylic acid) grafted chitosan). All adsorbents prepared were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and potentiometric titration. The surface features were also evaluated after the dorzolamide adsorption in order to derive the adsorption mechanism. It was suggested that the reactive groups of GO and CSA can interact with the amino groups of dorzolamide and mainly the abundance of carboxyl groups of GO/CSA composite was the main reason for its enhanced adsorption capacity.
authors: Division of Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece. Electronic address: georgekyzas@gmail.com.
authors: George Z
authors: GZ
authors: Kyzas
authors: Division of Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
authors: Dimitrios N
authors: DN
authors: Bikiaris
authors: Department of Chemistry, The City College of New York, 160 Convent Avenue, New York, NY 100 31, USA.
authors: Mykola
authors: M
authors: Seredych
authors: Department of Chemistry, The City College of New York, 160 Convent Avenue, New York, NY 100 31, USA.
authors: Teresa J
authors: TJ
authors: Bandosz
authors: Division of Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece. Electronic address: lenadj@chem.auth.gr.
authors: Eleni A
authors: EA
authors: Deliyanni
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008506:Medical Waste; D053761:Nanocomposites / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013449:Sulfonamides / Q000302:isolation & purification*; D013876:Thiophenes / Q000302:isolation & purification*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D000180:Acrylic Resins; D048271:Chitosan; D006108:Graphite; D008506:Medical Waste; D010087:Oxides; D012996:Solutions; D013449:Sulfonamides; D013876:Thiophenes; D062065:Wastewater; D014874:Water Pollutants, Chemical; C065246:chitosan-poly(acrylic acid); C062765:dorzolamide
keywords: Biomedical wastewater; Biosorbents; Chitosan; Dorzolamide; Graphite oxide