Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1996-11-12
1999-03-02
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210170, 210263, 210906, 210908, 210912, 210914, C02F 128
Patent
active
058766065
ABSTRACT:
The metal oxide media includes oxides and hydroxides of iron, and other metals. The material is derived from basic-oxygen steel-making process, and includes a high calcium content. The oxide surfaces facilitate the adsorption of phosphorus, and the increased pH facilitates the precipitation of calcium and other phosphates. The oxides are a catalyst for converting organic phosphorus to inorganic form. Limestone may be added to the oxides, to ensure a long-term source of calcium, and to maintain high pH for long periods.
REFERENCES:
patent: 3772901 (1973-11-01), Ferraro
patent: 4184947 (1980-01-01), Demisch
patent: 4414115 (1983-11-01), The
Baker Michael John
Blowes David William
Ptacek Carol Jane
Cintins Ivars
University of Waterloo
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