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Immobilization of Soluble Phosphorus in Animal Waste with SWAN-Gypsum and Iron Oxide Filter Cake Co-Products
The PI’s on this project are Drs. Gary Felton, K.J. Hughes, and L.J. Ottmar. The sponsor is Maryland Industrial Partnerships and Millennium Inorganic Chemicals, Inc. at a funding rate of $309,676. The duration of the project was February 2000 - January 2002.
Description: Two locally produced materials that contain both calcium and iron, SWAN-gypsum (SWAN) and Iron Oxide Filter Cake (FC) were tested for suitability as amendments to manures. These amendments form insoluble metal-phosphorus complexes, thereby decreasing phosphorus concentrations in soil pore water and surface runoff. Methods of investigation included laboratory incubation experiments and the construction of phosphorus sorption isotherms, as well as greenhouse and field plot experiments.
For more information, contact Dr. Gary Felton
Last updated: 04/9/2009
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