Study of the Mechanism of Dearsenification of Arsenopyrite Enhanced by Mechanically Modified Pyrite and Bacteria
Abstract
:1. Introduction
2. Experiments and Methods
2.1. Raw Materials
2.1.1. Pyrite
2.1.2. Arsenopyrite
2.2. Analytical Methods
2.3. Bioleaching
3. Results and Discussion
3.1. Bioleaching Experiments
3.2. Mechanism of Enhanced Dearsenification by Mechanically Modified Pyrite
3.2.1. Particle Size and Specific Surface Area
3.2.2. Particle Morphology and Microstructure
3.2.3. Crystal Structure Evolution of Pyrite
3.2.4. Raman Spectral Analysis
3.3. Mechanism Analysis of Enhanced Dearsenification
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Composition | S | Fe | Others |
---|---|---|---|
Weight % | 54.5 | 45.0 | 0.5 |
Element | As | Fe | S | Others |
---|---|---|---|---|
Weight % | 47.4 | 35.9 | 16.6 | 0.1 |
Enlarged Drawing | FWHM | |||||
---|---|---|---|---|---|---|
Py | Py-MA200 | Py-MA300 | Py-MA400 | Py-MA500 | Py-MA580 | |
0.095 | 0.095 | 0.109 | 0.122 | 0.143 | 0.168 | |
0.100 | 0.100 | 0.107 | 0.120 | 0.143 | 0.175 | |
0.102 | 0.102 | 0.111 | 0.126 | 0.151 | 0.189 | |
0.100 | 0.099 | 0.113 | 0.131 | 0.161 | 0.193 | |
0.103 | 0.109 | 0.120 | 0.138 | 0.170 | 0.210 | |
0.111 | 0.111 | 0.127 | 0.151 | 0.188 | 0.243 |
Dearsenification Extent | 1 | ||||
Lattice parameter | 0.68 | 1 | |||
Grain size | −0.92 ** | −0.90 * | 1 | ||
Amorphous degree | 0.87 * | 0.91 ** | −0.98 ** | 1 | |
Microscopic strain | 0.56 | 0.98 ** | −0.81 * | 0.83 * | 1 |
Dearsenification extent | Lattice parameter | Grain size | Amorphous degree | Microscopic strain | |
Moderate correlation | Strong correlation | extremely strong correlation | Strong positive correlation |
Scheme | Peak 1 | Peak 2 | ||
---|---|---|---|---|
Raman Shift/cm−1 | ∆Rs | Raman Shift/cm−1 | ∆Rs | |
Nonactivated | 346 | 0 | 382 | 0 |
MA200 | 341 | −5 | 373 | −9 |
MA300 | 341 | −5 | 374 | −8 |
MA400 | 340 | −6 | 373 | −9 |
MA500 | 342 | −4 | 375 | −7 |
MA580 | 344 | −2 | 379 | −3 |
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Chen, Y.; Yang, H.; Chen, G.; Tong, L.; Zhang, S. Study of the Mechanism of Dearsenification of Arsenopyrite Enhanced by Mechanically Modified Pyrite and Bacteria. Minerals 2023, 13, 880. https://doi.org/10.3390/min13070880
Chen Y, Yang H, Chen G, Tong L, Zhang S. Study of the Mechanism of Dearsenification of Arsenopyrite Enhanced by Mechanically Modified Pyrite and Bacteria. Minerals. 2023; 13(7):880. https://doi.org/10.3390/min13070880
Chicago/Turabian StyleChen, Yajing, Hongying Yang, Guomin Chen, Linlin Tong, and Shuo Zhang. 2023. "Study of the Mechanism of Dearsenification of Arsenopyrite Enhanced by Mechanically Modified Pyrite and Bacteria" Minerals 13, no. 7: 880. https://doi.org/10.3390/min13070880