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2 046 763

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IPC

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Application

4907929/26, 1991-02-05

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Actual filing date

1991-02-05

(45)

Published

1995-10-27

(72)

Inventor

Parkhomenko V.D.Pivovarov A.A.Kravchenko A.V.Kostrzhitskij V.K.Nesterenko A.F.Kuksenko A.N.Cherepenko A.P.

(73)

Holder

Pivovarov Aleksandr Andreevich

METHOD FOR REMOVAL OF SILVER IONS FROM FILM DEVELOPMENT WASTEWATER Russian patent published in 1995 - IPC

Abstract RU 2046763 C1

FIELD: wastewater treatment. SUBSTANCE: wastewater is treated with sulfuric acid to bring its pH value to that needed for decomposition of the thiosulfate complex. Then wastewater is continuously treated in the glow discharge zone at 500-2,000 V and 50-150 mA, and the liquid layer thickness in the glow discharge zone is 0.4-100 mm. It takes less than 12 min to reduce the content of silver ions in wastewater to the maximum permissible concentration. EFFECT: higher efficiency. 1 tbl

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RU 2 046 763 C1

Authors

Parkhomenko V.D.

Pivovarov A.A.

Kravchenko A.V.

Kostrzhitskij V.K.

Nesterenko A.F.

Kuksenko A.N.

Cherepenko A.P.

Dates

1995-10-27—Published

1991-02-05—Filed