Method for producing surface-engraved core-shell polymer microspheres for selective separation of heavy metal ions

摘要

A method of preparing surface-imprinted microspheres having a core-shell form for selective separation of heavy metal ions, includes reacting a metal salt of a heavy metal with a monomer having at least one group that reacts with the metal salt under conditions effective to prepare a metal ion-containing monomer; mixing the metal ion-containing monomer with a cross-linker monomer and a polymerization initiator in a solvent to provide a mixture; subjecting styrene to dispersion polymerization to provide polystyrene beads that serve as a core; causing absorption of dibutyl phthalate onto the polystyrene beads to provide dibutyl phthalate-containing polystyrene beads; adding the mixture to the dibutyl phthalate-containing polystyrene beads, causing absorption of the metal ion-containing monomer onto the dibutyl phthalate-containing polystyrene beads, and causing polymerization of the absorbed monomer with the cross-linker monomer to provide the surface-imprinted microspheres; and causing removal of the metal ions to provide imprinted sites.