Recovery of Zinc and Copper from Mine Tailings by Acid Leaching Solutions Combined with Carbon-Based Materials
Abstract
:Featured Application
Abstract
1. Introduction
2. Materials and Methods
2.1. Materials Selection and Characterization
2.2. Leaching Experiments
2.3. Statistical Analysis
3. Results
3.1. Materials Characterisation
3.2. Percentage of Zn and Cu Extracted in H2SO4 Leaching Solutions
3.3. pH and Eh Evolution During Leaching Experiments
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Mineral Specie | Content (%) |
---|---|
Muscovite | 49.6 ± 0.1 |
Quartz | 38.9 ± 0.9 |
Corkite | 6.9 ± 0.5 |
Calcite magnesium | 3.5 ± 0.1 |
Litharge | 0.5 |
Stannite | 0.4 |
Calcite | 0.2 |
Element | Content (wt%) |
---|---|
O | 39.37 ± 0.12 |
Si | 20.62 ± 0.12 |
Al | 8.32 ± 0.10 |
Fe | 9.07 ± 0.12 |
S | 1.94 ± 0.04 |
K | 2.10 ± 0.07 |
Pb | 2.18 ± 0.07 |
Zn | 1.38 ± 0.05 |
Ca | 0.344 ± 0.17 |
Mg | 0.283 ± 0.014 |
Ti | 0.252 ± 0.013 |
Na | 0.202 ± 0.06 |
As | 0.151 ± 0.0075 |
P | 0.0339 ± 0.0017 |
Ba | 0.0518 ± 0.0048 |
Cu | 0.0435 ± 0.0022 |
Sn | 0.0424 ± 0.0021 |
Mn | 0.0293 ± 0.0015 |
Zr | 0.0258 ± 0.0013 |
Element | Background Levels 1 (mg kg−1) | Maximum Allowable Limits 2 (mg kg−1) | Mine Waste Levels (mg kg−1) |
---|---|---|---|
Cr | 24–45 | 38–71 | 25–80 |
Co | 5–9 | 10–13 | ≤52 |
Ni | 17–25 | 30–34 | ≤37 |
Zn | 16–55 | 43–92 | 993–14,720 |
Cu | 12–23 | 23–32 | 18–268 |
As | 5–8 | 8–12 | ≤1930 |
Se | 0.2–0.6 | 0.4–0.5 | n.d. |
Cd | 0.1–0.4 | 0.4–0.9 | ≤65 |
Sb | 0.5–1.6 | 2–3 | ≤220 |
Hg | 0.1–0.4 | 0.4–1.2 | n.d. |
Tl | 0.1–0.4 | 0.5–0.8 | n.d. |
Pb | 3–10 | 5–34 | 75–27,780 |
Sample | %C | %H | %N | %S | %O | H/C | O/C | Ash (wt%) | pH | Eh (mV) | SBET (m2 g−1) | Porosity (%) |
---|---|---|---|---|---|---|---|---|---|---|---|---|
AC | 85.72 | 0.88 | 0.00 | 0.00 | 13.41 | 0.12 | 0.12 | 1.00 | 8.03 | 453 | 1138.96 | 73.26 |
VC | 80.21 | 3.12 | 0.92 | 0.00 | 15.74 | 0.47 | 0.15 | 14.94 | 8.31 | 355 | 2.18 | 63.73 |
pH (25 °C) | Eh (mV) | |
---|---|---|
RD+ H2SO4 1 M | 1.02 ± 0.02 | 654 ± 2.5 |
RD+ H2SO4 1 M + AC | 0.99 ± 0.01 | 557 ± 5.4 |
RD+ H2SO4 1 M + VC | 0.99 ± 0.01 | 627 ± 1.3 |
RD+ H2SO4 0.5 M | 1.08 ± 0.01 | 672 ± 3.3 |
RD+ H2SO4 0.5 M + AC | 1.09 ± 0.01 | 558 ± 8.0 |
RD+ H2SO4 0.5 M + VC | 1.09 ± 0.03 | 626 ± 1.7 |
RD+ H2SO4 0.25 M | 1.21 ± 0.06 | 672 ± 2.9 |
RD+ H2SO4 0.25 M + AC | 1.21 ± 0.03 | 530 ± 2.4 |
RD+ H2SO4 0.25 M + VC | 1.22 ± 0.03 | 632 ± 1.5 |
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Álvarez, M.L.; Méndez, A.; Rodríguez-Pacheco, R.; Paz-Ferreiro, J.; Gascó, G. Recovery of Zinc and Copper from Mine Tailings by Acid Leaching Solutions Combined with Carbon-Based Materials. Appl. Sci. 2021, 11, 5166. https://doi.org/10.3390/app11115166
Álvarez ML, Méndez A, Rodríguez-Pacheco R, Paz-Ferreiro J, Gascó G. Recovery of Zinc and Copper from Mine Tailings by Acid Leaching Solutions Combined with Carbon-Based Materials. Applied Sciences. 2021; 11(11):5166. https://doi.org/10.3390/app11115166
Chicago/Turabian StyleÁlvarez, María Luisa, Ana Méndez, Roberto Rodríguez-Pacheco, Jorge Paz-Ferreiro, and Gabriel Gascó. 2021. "Recovery of Zinc and Copper from Mine Tailings by Acid Leaching Solutions Combined with Carbon-Based Materials" Applied Sciences 11, no. 11: 5166. https://doi.org/10.3390/app11115166