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| Recovery of valuable metals by acid leaching of high chromium electroplating sludge and reaction kinetics analysis |
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Received:May 24, 2023
Revised:June 05, 2023
Accepted:June 13, 2023
Published Online:November 01, 2023
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| DOI： |
| KeyWord:High chromium electroplating sludge; Valuable metals; Acid leaching; Leaching kinetic |
| Author | Institution |
| XU Zhe |
Faculty of Land Resource Engineering,Kunming University of Science and Technology,Yunnan,Kunming |
| QIANG Zhiwen |
Faculty of Land Resource Engineering,Kunming University of Science and Technology,Yunnan,Kunming |
| LV Jinfang |
Faculty of Land Resource Engineering,Kunming University of Science and Technology,Yunnan,Kunming |
| KONG Lingyu |
Faculty of Land Resource Engineering,Kunming University of Science and Technology,Yunnan,Kunming |
| WEI Min |
Faculty of Land Resource Engineering,Kunming University of Science and Technology,Yunnan,Kunming |
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| Abstract: |
| Chromium, nickel, copper and zinc were extracted from high chromium electroplating sludge with sulfuric acid as leaching reagent. Under room temperature conditions, the leaching ratios of chromium, nickel, copper and zinc in sludge reached 94.2%, 96.5%, 92.9% and 95.3%, respectively, when the sulfuric acid concentration was 4mol/L, the ratio of solid to liquid was 1:10 and the reaction time was 75min. The kinetic analysis showed that chromium, copper and zinc were controlled by interfacial mass transfer and solid film diffusion, while nickel was controlled by chemical reaction. |
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