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| Study on Leaching of Silver based on Organic Acid from Decommissioned Crystalline Silicon Photovoltaic Modules |
| Received:July 26, 2024 Revised:September 14, 2024 |
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| DOI：doi：10.20237/j.issn.1007-7545.2025.01.013 |
| KeyWord:Decommissioned silicon photovoltaic module; Orthogonal test; Leach; Organic acid; Metallic silver |
| Author | Institution |
| BAO Guoying |
青海大学 机械工程学院 青海 西宁 |
| WANG Shan |
青海大学 机械工程学院 青海 西宁 |
| GAO Dedong |
青海大学 机械工程学院 青海 西宁 |
| QI Zuxing |
青海大学 机械工程学院 青海 西宁 |
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| Abstract: |
| The leaching of precious metal silver from decommissioned crystalline silicon photovoltaic module is studied. Silver is leached by methanesulfonic acid-hydrogen peroxide system and citric acid-hydrogen peroxide system respectively. The results show that in the methanesulfonic acid-hydrogen peroxide system, the optimal process conditions are as follows H2O2 concentration 10%, methanesulfonic acid concentration 40%, reaction temperature 80℃, reaction time 2.5 h. The leaching rate of silver can reach 59.97%；in the citric acid-hydrogen peroxide system, the optimum process conditions are as follows: H2O2 concentration 30%, citric acid concentration 6 g/L, reaction temperature 80 ℃, stirring speed 300 r/min, the leaching rate of silver can reach 95.53%. The results show that the citric acid system can extract silver more effectively, and the increase of reaction temperature and H2O2 concentration can promote the leaching of silver. |
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