Browsing by Author "Selamawit Teshome"
Item Electrolytic Silver Recovery from Photographic Fixer Solution: Berhanena Selam Printing Enterprise(Addis Ababa University, 2023-05) Selamawit Teshome; Abubeker Yimum (PhD)The goal of the study is to develop an electrolysis process for recovering silver from waste photographic fixer. Brehanena Selam Printing Enterprise provided the samples for the investigation. The experimental runs are randomized, and suitable software is used for the analytical process. Portal for Design Expert 6.0.8: Box-Behnken Design was used during this study statistical method of surface response methodology (SRM) was used for analyzing of laboratory result of silver recovery. The amount of the variable used in the study was selected after considering the effects of each parameter on the results. Ph (4-8), current density (2-5), and time (20-90).17 different laboratory experiments were carried out within these specified ranges. ANOVA results, fitness graphs, and 3D graphs of operational parameters were examined using BBD (Box-Behnken Design) of RMS (Response Surface Methodology) and fit summery and also XRD analysis and XRF analysis. The three parameter investigated that the result showed pH at 6 and current density at 5A and contact time at 1:30hr gives silver yield of 97.295%. This is my optimum result. So the result of the study showed that electrolysis process on silver recovery from photographic waste is technically feasible.