Patent ID: 9334176
Filing Date: 2016-05-10
CPC Classification: B01J,C02F

Claim Text:
1. A method for removing organic dyes from wastewater, comprising the steps of: placing magnetic polymer microspheres into contact with wastewater contaminated with organic dyes, the microspheres having an adsorbent polymer formed around a ferromagnetic core, the adsorbent polymer for adsorbing the organic dyes; wherein the polymer comprises 4-aminophenol-formaldehyde and the ferromagnetic core comprises at least one nanoparticle of ferrite (Fe3O4); leaving the microspheres in contact with the wastewater for a sufficient time to permit the organic dyes to adsorb onto the polymer of the magnetic polymer microspheres; removing the magnetic polymer microspheres from the wastewater by applying an external magnetic field to the microspheres in the wastewater; placing the polymer microspheres in contact with a regenerating solution to regenerate the microspheres; separating the regenerated magnetic polymer microspheres from the regenerating solution; and recycling the regenerated magnetic polymer microspheres; whereby the regenerated magnetic polymer microspheres are available for continuously removing organic dyes from wastewater.