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- W2746807978 abstract "Bioleaching was applied to mobilize metals from printed wire boards (PWBs). PWBs have a rich metal content and are produced in high volume. Operating conditions of bioleaching of PWBs using an adapted mixed culture of Acidithiobacillus ferrooxidans ( A. ferrooxidans ) and A. thiooxidans to recover Cu, Zn and Ni were optimized in this study. The adaptation phase began at 1 g/L PWBs powder with 10% inoculation and the final pulp density was 20 g/L after about 40 days. Optimization was performed using central composite design method to optimize four effective factors, including initial pH (1.5 to 2), pulp density (15 to 25 g/L), initial sulfur (3 to 7 g/L) and initial FeSO 4 (15 to 25g/L), to achieve maximum recoveries of Cu, Zn and Ni. Also, the present study evaluated the effect of the independent variables initial pH, pulp density, initial Fe 3+ concentration and initial sulfur content on extraction of metals from PWBs. Results showed that with an initial pH of 1.5, 25g/L pulp density, 25 g/L of FeSO 4 ·7H 2 O and 7 g/L of S 0 , copper, zinc and nickel recoveries reached 92%, 96% and 94%, respectively, after 25 days." @default.
- W2746807978 created "2017-08-31" @default.
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- W2746807978 date "2017-08-01" @default.
- W2746807978 modified "2023-09-27" @default.
- W2746807978 title "Optimization of Ni, Cu and Zn Recovery in Bioleaching of Electronic Scrap" @default.
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- W2746807978 doi "https://doi.org/10.4028/www.scientific.net/ssp.262.692" @default.
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