CYCLIC VOLTAMMETRIC STUDIES OF THE PHOTOGRAPHIC FIXER SOLUTION

During the processing of photographic films, X-ray films and motion pictures, effluents are generated at various stages of film developments. Due to the rapid rise in price of silver and fixer chemicals and increasing pressure with respect to environmental discharge requirements, it is imperative to recover silver besides the regeneration of fixer chemicals. In B/W films processing, near ly 75% of silver in the film is dissolved whereas essentially all the silver is removed from colour processing. Eventhough several methods are available for the recovery of silver, the electrochemical route is well suited in that it not only yields a silver of high purity front fixing baths, but also the regenerated fixer solution could be recycled its the process. When the potential is cycled between -50 mv and -1350 mv, four peaks, two on the cathodic scan and two on the anodic scan are observed, The effect of potential cycling between different potentials and the effect of scan rate on the various electrochemical reactions have been studied