Removal of Cu(II) from acid leach solution of electronic waste utilizing magnetic activated carbon derivatized with α‐benzoinoxime: alternate mining source

Removal of Cu(II) from acid leach solution of electronic waste utilizing magnetic activated carbon derivatized with α‐benzoinoxime: alternate mining source

BACKGROUND Copper plays a leading role in the electronics industry. Drastic innovation and fast obsolescence rate raise the demand for copper for electrical and electronic equipment. The high amount of electronic waste discarded is considered the primary alternative source and is now seen as a secon...

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Bibliographic Details
Published in:Journal of chemical technology and biotechnology (1986) Vol. 98; no. 4; pp. 967 - 977
Main Authors: Iqbal, Aamir, Jan, Muhammad. Rasul, Shah, Jasmin, Sarwar, M. Nazim
Format: Journal Article
Language:English
Published: Chichester, UK John Wiley & Sons, Ltd 01-04-2023
Wiley Subscription Services, Inc
Subjects:
acid leaching
Activated carbon
Carbon
Copper
Economic impact
Electronic equipment
Electronic waste
Electronics industry
Heavy metals
Impact analysis
magnetic activated carbon
Materials recovery
Nanoparticles
Nitric acid
Obsolescence
Physical characteristics
Rare earth elements
solid‐phase extraction
Sorbents
Sorption
α‐benzoinoxime
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Summary:BACKGROUND Copper plays a leading role in the electronics industry. Drastic innovation and fast obsolescence rate raise the demand for copper for electrical and electronic equipment. The high amount of electronic waste discarded is considered the primary alternative source and is now seen as a secondary reservoir for copper metal. Besides the economic impact, copper interferes with selective recovery of other metals such as critical, precious and rare earth elements from electronic waste. RESULTS In this work, to purify acid leach solution of electronic waste from Cu(II) ions, a selective sorbent was synthesized. A Cu(II) specified ligand, α‐benzoinoxime, was impregnated with magnetic nanoparticle‐modified activated carbon and utilized as magnetic solid‐phase sorbent. The synthesized sorbent was analysed for its morphological and other characteristic properties. CONCLUSION The study indicates that percent recovery increased from 89% to >95% after impregnation. Complexation between Cu(II) and α‐benzoinoxime‐modified activated carbon caused the sorbent to attain higher retention at pH > 8.5. Sorption capacity calculated from Langmuir sorption isotherm was 147 mg g−1, while the sorption process follows a pseudo‐second‐order kinetic model. The sorbed Cu(II) was quantitatively (>97%) eluted with 1 mol L−1 nitric acid. The method was validated with standard reference material GF10928752‐Aldrich. Results show that the synthesized sorbent is good for Cu(II) masking and recovery, even if applied to samples with a complex sample matrix. © 2022 Society of Chemical Industry (SCI).
ISSN:0268-2575
1097-4660
DOI:10.1002/jctb.7302