The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2001
Filed:
Sep. 15, 1998
Ilhan Olmez, Instanbul, TR;
Francis X. Pink, Norwood, MA (US);
Duran Karakas, Ankara, TR;
Duane S. Boning, Belmont, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A method for the removal of copper from waste waters includes providing a solution to be treated, the solution comprising copper; introducing a source of ferric ions and a source of ferrous ions into the solution; and adjusting the pH of the solution to promote formation of a copper-containing ferrite precipitate, whereby the solution is depleted in copper. In instances where the solution contains ferric ions, the method includes introducing a source of ferrous ions into the solution to obtain a solution comprising ferric ions and ferrous ions; and adjusting the pH of the solution to promote formation of a copper-containing ferrite precipitate, whereby the solution is depleted in copper. The method may include a step for removing oxidizers by introducing a source of ferric ions or ferrous ions to the solution to decomposed the oxidizer; introducing a source of ferric ions or ferrous ions to the solution to obtain a solution comprising ferric ions and ferrous ions; and adjusting the pH of the solution to promote formation of a copper-containing ferrite precipitate, whereby the solution is depleted in copper. The method may be applied to other aqueous systems for the removal of a variety of metals from waste water. Ferrite may be removed by magnetic separation.