title: Selective removal of erythromycin by magnetic imprinted polymers synthesized from chitosan-stabilized Pickering emulsion.
abstract: Magnetic imprinted polymers (MIPs) were synthesized by Pickering emulsion polymerization and used to adsorb erythromycin (ERY) from aqueous solution. The oil-in-water Pickering emulsion was stabilized by chitosan nanoparticles with hydrophobic Fe3O4 nanoparticles as magnetic carrier. The imprinting system was fabricated by radical polymerization with functional and crosslinked monomer in the oil phase. Batches of static and dynamic adsorption experiments were conducted to analyze the adsorption performance on ERY. Isotherm data of MIPs well fitted the Freundlich model (from 15 °C to 35 °C), which indicated heterogeneous adsorption for ERY. The ERY adsorption capacity of MIPs was about 52.32 μmol/g at 15 °C. The adsorption kinetics was well described by the pseudo-first-order model, which suggested that physical interactions were primarily responsible for ERY adsorption. The Thomas model used in the fixed-bed adsorption design provided a better fit to the experimental data. Meanwhile, ERY exhibited higher affinity during adsorption on the MIPs compared with the adsorption capacity of azithromycin and chloramphenicol. The MIPs also exhibited excellent regeneration capacity with only about 5.04% adsorption efficiency loss in at least three repeated adsorption-desorption cycles.
authors.affiliation: School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China. Electronic address: ouyang727611@gmail.com.
authors.forename: Hongxiang
authors.initials: H
authors.lastname: Ou
authors.affiliation: School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China.
authors.forename: Qunhui
authors.initials: Q
authors.lastname: Chen
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Jianming
authors.initials: J
authors.lastname: Pan
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Yunlei
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Huang
authors.affiliation: School of Medicine, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Xueyong
authors.initials: X
authors.lastname: Qi
mesh_terms: D000327:Adsorption; D000900:Anti-Bacterial Agents / Q000302:isolation & purification*; D048271:Chitosan / Q000737:chemistry*; D004655:Emulsions; D004917:Erythromycin / Q000302:isolation & purification*; D052203:Ferrosoferric Oxide; D005296:Ferrous Compounds / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D054802:Molecular Imprinting / Q000379:methods*; D053758:Nanoparticles; D011108:Polymers; D012996:Solutions; D013816:Thermodynamics
chemical_list: D000900:Anti-Bacterial Agents; D004655:Emulsions; D005296:Ferrous Compounds; D011108:Polymers; D012996:Solutions; D004917:Erythromycin; D048271:Chitosan; C034236:ferrous oxide; D052203:Ferrosoferric Oxide
keywords: Adsorption; Erythromycin; Magnetic imprinted polymers; Pickering emulsion polymerization