Development of a Colloid Chemical Process for Magnetic Seeding to Organic Dye

The recovery of organic dye molecules was achieved by using a colloidal magnetic seeding process under high-gradient magnetic separation. The recovery fraction of dye molecules was dependent on the adsorption capacity of the dye molecules. A magnetic colloid can recover a much greater amount of dye molecules than magnetite particles. The adsorption of orange II molecules was found to be an irreversible process, and orange II molecule could be more tightly adsorbed on a magnetic colloid than a magnetite particle surface.