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Magnetic filtration process, magnetic filtering material, and methods of forming magnetic filtering material

United States Patent

8,551,617
October 8, 2013
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
The present invention provides magnetically responsive activated carbon, and a method of forming magnetically responsive activated carbon. The method of forming magnetically responsive activated carbon typically includes providing activated carbon in a solution containing ions of ferrite forming elements, wherein at least one of the ferrite forming elements has an oxidation state of +3 and at least a second of the ferrite forming elements has an oxidation state of +2, and increasing pH of the solution to precipitate particles of ferrite that bond to the activated carbon, wherein the activated carbon having the ferrite particles bonded thereto have a positive magnetic susceptibility. The present invention also provides a method of filtering waste water using magnetic activated carbon.
Taboada-Serrano; Patricia (La Paz, BO), Tsouris; Constantino (Oak Ridge, TN), Contescu; Cristian I. (Knoxville, TN), McFarlane; Joanna (Oak Ridge, TN)
UT-Battelle, LLC (Oak Ridge, TN)
12/ 338,442
20100155335
December 18, 2008
This invention was made with government support under contract no. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.