Fluid purification

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B - Operations, Transporting

01

J

B01J 19/08 (2006.01) B01J 19/12 (2006.01) C02F 1/32 (2006.01) C02F 1/70 (2006.01) C02F 1/72 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2170111

The present invention relates to a method for the purification of contaminated fluids by photocatalytic treatment. In accordance with the invention, an oxidation state where contaminant molecules are oxidized and/or a reduction state where contaminant molecules are reduced are employed to purify a contaminated fluid. The reduction state, where certain contaminant molecules are reduced, is induced by providing a reactant, such as citric acid, in the presence of an excited photocatalyst. A reduction state may alternate to an oxidation state, where contaminant molecules are oxidized, by the addition of an oxidizing agent, such as oxygen.

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