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电视台、电影制片广、医院、照相馆等单位,常有定影废液排出.由于废液来源分散,不便大批量处理,以往的废液都是白白排放掉,这样,既浪费了贵重金属资源又污染了环境.近年来,我国有关部门越来越重视定影废液中银的回收.目前,国内外从定影废液中回收银一般有两种方法:一为电解法;二为化学法.定影废液的含银量一般为4—6克/升.为了选择最佳的工艺条件,回收银前对定影废液中含银量进行分析是很必要的.
Television stations, film production, hospitals, photo galleries and other units often have fixed waste discharge.Due to the scattered source of waste, inconvenience in large quantities, the previous waste is discharged in vain, so that not only a waste of precious metals resources But also pollutes the environment.In recent years, the relevant departments in our country pay more and more attention to the recovery of silver in the fixing waste liquid.At present, there are two methods to recover silver from the fixing waste liquid at home and abroad: one is electrolysis method and the other is chemical method. The silver content of the waste liquid is generally 4-6 grams / liter.In order to select the best process conditions, it is necessary to analyze the silver content of the fixing waste liquid before the silver is recovered.