Massachusetts Institute of Technology

Gte Laboratories Incorporated

Francis X Pink

Carmine Persiani

Duane S Boning

Paul Lublin

Ilhan Olmez

Duran Karakas

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.

Removal of contaminant metals from waste water

The pressure of a gas in a closed vessel can be non-destructively read by irradiating the closed vessel with x-rays. The irradiated gases in the vessel emit x-rays characteristic of various gases within the vessel. The characteristic x-rays, which pass out of the vessel, are discriminated and their intensity count converted to a pressure reading.

Method of non-destructively measuring the pressure of a gas in a closed

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Norwood, MA, United States of America

Francis X Pink