title: Methyl parathion imprinted polymer nanoshell coated on the magnetic nanocore for selective recognition and fast adsorption and separation in soils.
abstract: Core-shell magnetic methyl parathion (MP) imprinted polymers (Fe3O4@MPIPs) were fabricated by a layer-by-layer self-assembly process. In order to take full advantage of the synergistic effect of hydrogen-binding interactions and π-π accumulation between host and guest for molecular recognition, methacrylic acid and 4-vinyl pyridine were chosen as co-functional monomers and their optimal proportion were investigated. The core-shell and crystalline structure, morphology and magnetic properties of Fe3O4@MPIPs were characterized. The MP-imprinted nanoshell was almost uniform and about 100nm thick. Binding experiments demonstrated that Fe3O4@MPIPs possessed excellent binding properties, including high adsorption capacity and specific recognition, as well as fast adsorption kinetics and a fast phase separation rate. The equilibration adsorption capacity reached up to 9.1mg/g, which was 12 times higher than that of magnetic non-imprinted polymers, while adsorption reached equilibrium within 5min at a concentration of 0.2mmol/L. Furthermore, Fe3O4@MPIPs successfully provided selective separation and removal of MP in soils with a recovery and detection limit of 81.1-87.0% and 5.2ng/g, respectively.
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China.
authors.forename: Shiying
authors.initials: S
authors.lastname: Xu
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China.
authors.forename: Changjuan
authors.initials: C
authors.lastname: Guo
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China.
authors.forename: Yongxian
authors.initials: Y
authors.lastname: Li
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China.
authors.forename: Zerong
authors.initials: Z
authors.lastname: Yu
authors.affiliation: The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, College of Environmental Science and Engineering, South China University of Technology, Guangzhou, China.
authors.forename: Chaohai
authors.initials: C
authors.lastname: Wei
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China. Electronic address: tanglab@scnu.edu.cn.
authors.forename: Youwen
authors.initials: Y
authors.lastname: Tang
mesh_terms: D000327:Adsorption; D058185:Magnetite Nanoparticles / Q000737:chemistry; D008743:Methyl Parathion / Q000737:chemistry / Q000302:isolation & purification*; D057145:Nanoshells / Q000737:chemistry*; D012989:Soil Pollutants / Q000302:isolation & purification*
chemical_list: D058185:Magnetite Nanoparticles; D012989:Soil Pollutants; D008743:Methyl Parathion
keywords: Layer-by-layer self-assembly; Methyl parathion; Molecularly imprinted polymers; Soil samples; Superparamagnetic