Magnetic Filtration

Heterogeneous flocculation between colloidal particles and added magnetic seeding particles followed by high-gradient magnetic filtration (HGMF) are combined in a magnetically-seeded separation method for colloidal particulates. This process is applicable for the treatment of several DOE waste streams. The effects of all forces acting on particles, e.g., van der Waals, electrostatic, hydrodynamic, and magnetic on both flocculation in a standard stirred tank and HGMF are investigated. This project is funded by the Efficient Separations and Processing Crosscutting Program, Office of Environmental Management, U.S. Department of Energy.

Cryogenic and water-cooled magnets are used for magnetic separations studies. A cryogenic magnet (blue tank) with power supply is shown in this picture.