Treatment of electronic waste to recover metal values using thermal plasma coupled with acid leaching - A response surface modeling approach

Journal Article · Thu Mar 15 04:00:00 EDT 2012 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2011.11.001· OSTI ID:21612950

Nayak, Pradeep; Mukherjee, P S; Roy Chaudhury, G; Mishra, B K ^[1]

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1. Institute of Minerals and Materials Technology (CSIR), Bhubaneswar 751 013, Odisha (India)

Highlights: Black-Right-Pointing-Pointer Sentences/phrases were modified. Black-Right-Pointing-Pointer Necessary discussions for different figures were included. Black-Right-Pointing-Pointer More discussion have been included on the flue gas analysis. Black-Right-Pointing-Pointer Queries to both the reviewers have been given. - Abstract: 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.

• OSTI ID: 21612950
• Journal Information: Waste Management, Journal Name: Waste Management Journal Issue: 3 Vol. 32; ISSN WAMAE2; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
ALLOYS
ALUMINIUM ALLOYS
CHLORINE COMPOUNDS
COBALT
COHERENT SCATTERING
COPPER
DIAGRAMS
DIFFRACTION
DISPERSIONS
DISSOLUTION
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUE GAS
GASEOUS WASTES
HALOGEN COMPOUNDS
HOT PLASMA
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
INORGANIC COMPOUNDS
IRON ALLOYS
LEACHING
MANAGEMENT
METALS
MIXTURES
NICKEL
PHASE DIAGRAMS
PLASMA
PROCESSING
SCATTERING
SEPARATION PROCESSES
SURFACES
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
X-RAY DIFFRACTION