Process for removal of contaminants from wastes

Abstract

Abstract IN A PROCESS FOR CONTINUOUS REMOVAL OF CONTAMINANTS INCLUDING CYANIDES AND TOXIC METALS SUCH AS COPPER, ZINC, SILVER, CHROMIUM, CADMIUM AND OTHERS BY THE ELECTROLYTIC PROCESS, AN ELECTROLYTIC CELL IS PARTITIONED BY A MEMBRANE INTO AT LEAST TWO ELECTROLYTIC CHAMBERS WHICH ARE FILLED WITH ELECTRIC CONDUCTORS IN A GRANULAR, FIBROUS OR SEGMENTAL FORM WITH POSITIVE AND NEGATIVE MAJOR ELECTRODES RESPECTIVELY THEREBY TO FORM AN ANODE CHAMBER AND A CATHODE CHAMBER IN ABUTTING RELATION THROUGH THE MEMBRANE. IN ACCORDANCE WITH THE PROPERTIES OF CONTAMINANTS OR THE PRESENCE OF CYANIDES, THE RINSE WATER IS SELECTIVELY LED INTO THE ANODE CHAMBER OR THE CATHODE CHAMBER TO EFFECT THE REDUCTION AND/OR OXIDATION WITH DECOMPOSITION OF THE TOXIC METALS AND CYANIDES SO THAT THE POLLUTION CONCENTRATION OF THE RINSE WATER IS LOWERED. THE RINSE WATER WITH POOR POLLUTION CONTENT IS THEN MIGRATED THROUGH THE MEMBRANE INTO THE CATHODE CHAMBER OR THE ANODE CHAMBER TO BRING A FURTHER REDUCTION AND/OR OXIDATION WITH DECOMPOSITION OF THE RESIDUAL METALS AND CYANIDES FOR REMOVAL OR DESTRUCTION OF THE CONTAMINANTS FROM THE RINSE WATER. THE ANODE CHAMBER OR THE CATHODE CHAMBER FILLED WITH THE GRANULAR OR FIBROUS CONDUCTORS WITH MAJOR ELECTRODES MAY BE REPLACED BY A POROUS CONDUCTIVE METAL SLEEVE.

Inventors

• 👤 K Okubo
• 👤 A Ueno

Bibliographic Details