The Phosphorus Transport in Groundwater from Phosphogypsum-Based Cemented Paste Backfill in a Phosphate Mine: A Numerical Study
Abstract
:1. Introduction
2. Materials and Methods
2.1. Numerical Simulation
2.1.1. Study Area and Stratigraphy
2.1.2. Hydro-Geological Conceptual Model Development
2.1.3. Parameter Settings Related to TP Diffusion in MT3DMS
2.2. Test Material
2.3. Experimental Method
2.3.1. Preparation of the PG Sample
2.3.2. Toxicity Leaching Test
2.3.3. Pollutant Indicator Testing
2.4. Mathematical Regression of TP Transport Dispersion Model
3. Results
3.1. Leaching Toxicity Test
3.2. Simulation of Pollutant Transport Using the MT3DMS Model
3.3. Spatiotemporal Transport Mechanism of Phosphorus in Groundwater
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Chemical Composition | F | Na2O | MgO | Al2O3 | SiO2 | P2O5 | SO3 | K2O |
---|---|---|---|---|---|---|---|---|
Mass fraction/% | 0.97 | 0.069 | 0.056 | 0.662 | 5.92 | 0.875 | 53.72 | 0.368 |
Chemical composition | CaO | TiO2 | Fe2O3 | CuO | ZnO | SrO | ZrO2 | BaO |
Mass fraction/% | 36.44 | 0.106 | 0.573 | 0.013 | 0.003 | 0.076 | 0.006 | 0.14 |
Number | M1 | M2 | M3 |
---|---|---|---|
Cement-sand ratio | 1:6 | 1:8 | 1:10 |
TP concentration (mg/L) | 0.59 | 1.88 | 2.46 |
Region | Eigenvalue | ||
---|---|---|---|
RMSE | R2 | SSE | |
Western | 0.13 | 0.85 | 29.87 |
Eastern | 0.08 | 0.73 | 12.57 |
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Chen, Q.; Zhou, H.; Liu, Y.; Wang, D. The Phosphorus Transport in Groundwater from Phosphogypsum-Based Cemented Paste Backfill in a Phosphate Mine: A Numerical Study. Int. J. Environ. Res. Public Health 2022, 19, 14957. https://doi.org/10.3390/ijerph192214957
Chen Q, Zhou H, Liu Y, Wang D. The Phosphorus Transport in Groundwater from Phosphogypsum-Based Cemented Paste Backfill in a Phosphate Mine: A Numerical Study. International Journal of Environmental Research and Public Health. 2022; 19(22):14957. https://doi.org/10.3390/ijerph192214957
Chicago/Turabian StyleChen, Qiusong, Huibo Zhou, Yikai Liu, and Daolin Wang. 2022. "The Phosphorus Transport in Groundwater from Phosphogypsum-Based Cemented Paste Backfill in a Phosphate Mine: A Numerical Study" International Journal of Environmental Research and Public Health 19, no. 22: 14957. https://doi.org/10.3390/ijerph192214957