Treatment of electronic waste to recover metal values using thermal plasma coupled with acid leaching – A response surface modeling approach
| Autor: | Bijay K. Mishra, G. Roy Chaudhury, Swagat S. Rath, Pradeep Nayak, P.S. Mukherjee |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Models Statistical Plasma Gases Chemistry Metallurgy Alloy Inorganic chemistry chemistry.chemical_element Mineral acid Hydrochloric acid engineering.material Copper Electronic Waste Metal chemistry.chemical_compound Transition metal Metals visual_art visual_art.visual_art_medium engineering Hydrochloric Acid Leaching (metallurgy) Waste Management and Disposal Dissolution |
| Zdroj: | Waste Management. 32:575-583 |
| ISSN: | 0956-053X |
| Popis: | The global crisis of the hazardous electronic waste (E-waste) is on the rise due to increasing usage and disposal of electronic devices. A process was developed to treat E-waste in an environmentally benign process. The process consisted of thermal plasma treatment followed by recovery of metal values through mineral acid leaching. In the thermal process, the E-waste was melted to recover the metal values as a metallic mixture. The metallic mixture was subjected to acid leaching in presence of depolarizer. The leached liquor mainly contained copper as the other elements like Al and Fe were mostly in alloy form as per the XRD and phase diagram studies. Response surface model was used to optimize the conditions for leaching. More than 90% leaching efficiency at room temperature was observed for Cu, Ni and Co with HCl as the solvent, whereas Fe and Al showed less than 40% efficiency. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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