Decouple and compare the role of abiotic factors and developed iron and sulphur oxidizers for enhanced extraction of metals from television printed circuit boards

Chemical leaching agents were compared for metal extractions from selected e-waste. Effect of iron, sulphur oxidizers and the formulated consortium were investigated for metals extraction from television printed circuit boards. The consortium showed maximum metal leaching efficiency. The bioleaching...

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Bibliographic Details
Published in:Separation science and technology 2019-03, Vol.54 (4), p.591-601
Main Authors: Sodha, Asha B., Shah, Monal B., Qureshi, Sufiya A., Tipre, Devayani R., Dave, Shailesh R.
Format: Article
Language:English
Subjects:
Abiotic factors
Bacterial leaching
Bioleaching
Circuit boards
Consortia
Copper
e-waste
EDTA
Electronic waste
Heavy metals
Iron
iron and sulphur oxidizing consortium
Leaching
Metals
multi-metals
Nickel
Organic chemistry
Oxidizing agents
Oxidoreductions
Printed circuit boards
Printed circuits
Pyrite
Redox potential
Sulfur
Sulphur
Television
Zinc
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Summary:Chemical leaching agents were compared for metal extractions from selected e-waste. Effect of iron, sulphur oxidizers and the formulated consortium were investigated for metals extraction from television printed circuit boards. The consortium showed maximum metal leaching efficiency. The bioleaching profile was studied as a function of pH, redox potential, acid consumed and the amount of Cu, Zn and Ni extracted. At 10 g/L of e-waste, 90%, 93% and 87% of Cu, Zn and Ni were extracted within 96 h. Ethylene diamine tetra acetic and pyrite were found beneficial. Two-step process resulted in more metal extraction even at 100 g/L pulp density.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2018.1512616