Method of treating waste water

U.S. Patent Number: 5380443

Abstract: A process of treating water to remove metal ion contaminants contained therein, said metal ion contaminants selected from the group consisting of metals in Groups 8, 1b, 2b, 4a, 5a, or 6a of the periodic table, lanthanide metals, and actinide metals including transuranic element metals, by adjusting the pH of a metal ion contaminant-containing water source to within the range of about 6.5 to about 14.0, admixing the water source with a mixture of an alkali or alkaline earth ferrate and a water soluble salt, e.g., a zirconium salt, in an amount sufficient to form a precipitate within the water source, the amount the mixture of ferrate and water soluble salt effective to reduce the metal ion contaminant concentration in the water source, permitting the precipitate in the admixture to separate and thereby yield a supernatant liquid having a reduced metal ion contaminant concentration, and separating the supernatant liquid having the reduced metal ion contaminant concentration from the admixture is provided. A composition of matter including an alkali or alkaline earth ferrate and a water soluble salt, e.g., a zirconium salt, is also provided.

Inventors: Deininger; James P. (Colorado Springs, CO), Chatfield; Linda K. (Colorado Springs, CO)

Assignee: The Regents of the University of California (Oakland, CA)

Application Number: 07/776,246

Issued: 1995-01-10

Expired: 2007-01-10

Classes: 210/724 ; 210/726; 210/912; 423/101; 423/34

Field of search: 210/702,716,717,723,724,726,721,912,913,914 252/175,181,631 423/11,34,101

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