Determination of Dissolution Rates of Ag Contained in Metallurgical and Mining Residues in the S2O32−-O2-Cu2+ System: Kinetic Analysis
Abstract
:1. Introduction
2. Materials and Methods
3. Results
3.1. Chemical Characterization
3.2. Mineralogical Characterization
3.3. Physical Characterization
3.4. Dissolution Curves of Ag and Kinetic Model
3.4.1. Effect of Partial Pressure of Oxygen
3.4.2. Particle Size Effect
3.4.3. Thiosulfate Concentration Effect
3.4.4. Cu2+ Concentration Effect
3.4.5. pH Effect
3.4.6. Temperature Effect
3.4.7. Stirring Rate Effect
4. Discussion
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Parameters | Experimental Conditions |
---|---|
d0 (µm) | 149, 106, 75, 56, 44, 37,25 |
[Cu2+] (mol·L−1) | 0.001, 0.002, 0.003, 0.004, 0.006 |
[S2O32−] (mol·L−1) | 0.02, 0.04, 0.06, 0.08, 0.16, 0.40 |
T (K) | 288, 298, 308, 318, 328 |
RPM (min−1) | 250, 350, 450, 550, 650, 750 |
PO2 | 1 atm (excess) |
[OH−] (mol·L−1) | 1 × 10−9, 1 × 10−7, 1 × 10−5,1 × 10−3, 1 × 10−2 |
Mesh | Opening (µm) | Ag Retained (g/ton−1) | Weight (wt %) | Distribution ofAg (wt %) |
---|---|---|---|---|
<100 | 149 | 50.13 | 40 | 43.51 |
100–140 | 106 | 24.36 | 53 | 28 |
140–200 | 75 | 2.81 | 66 | 4.01 |
200–270 | 56 | 1.27 | 63 | 1.73 |
270–325 | 44 | 1.18 | 73 | 1.86 |
325–400 | 37 | 1.20 | 82 | 2.12 |
>400 | 25 | 1.65 | 101 | 3.53 |
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Juárez Tapia, J.C.; Patiño Cardona, F.; Roca Vallmajor, A.; Teja Ruiz, A.M.; Reyes Domínguez, I.A.; Reyes Pérez, M.; Pérez Labra, M.; Flores Guerrero, M.U. Determination of Dissolution Rates of Ag Contained in Metallurgical and Mining Residues in the S2O32−-O2-Cu2+ System: Kinetic Analysis. Minerals 2018, 8, 309. https://doi.org/10.3390/min8070309
Juárez Tapia JC, Patiño Cardona F, Roca Vallmajor A, Teja Ruiz AM, Reyes Domínguez IA, Reyes Pérez M, Pérez Labra M, Flores Guerrero MU. Determination of Dissolution Rates of Ag Contained in Metallurgical and Mining Residues in the S2O32−-O2-Cu2+ System: Kinetic Analysis. Minerals. 2018; 8(7):309. https://doi.org/10.3390/min8070309
Chicago/Turabian StyleJuárez Tapia, Julio C., Francisco Patiño Cardona, Antonio Roca Vallmajor, Aislinn M. Teja Ruiz, Iván A. Reyes Domínguez, Martín Reyes Pérez, Miguel Pérez Labra, and Mizraim U. Flores Guerrero. 2018. "Determination of Dissolution Rates of Ag Contained in Metallurgical and Mining Residues in the S2O32−-O2-Cu2+ System: Kinetic Analysis" Minerals 8, no. 7: 309. https://doi.org/10.3390/min8070309