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This article discusses a method to recover silver from waste X-ray films with the spent fixing bath. At first, the silver in the waste fixing bath was reduced by KBH 4 at pH 8~9. Then the silver-free fixing bath was oxidized by air and some main components were replenished. As a leaching solution, the silver-free spent fixing bath was used to recover silver on the waste X-ray films. The total...
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