| Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences | Host |
| Groundwater Science and Engineering Limited | Publish |
| Citation: |
Su Hui-Meng, Zhang Fa-Wang, Hu Jing-Yu, Lei Jin-Feng, Zuo Wei, Yang Bo, Liu Yu-Hua. 2024. Identified the hydrochemical and the sulfur cycle process in subsidence area of Pingyu mining area using multi-isotopes combined with hydrochemistry methods. Journal of Groundwater Science and Engineering, 12(1): 62-77. doi: 10.26599/JGSE.2024.9280006
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Identified the hydrochemical and the sulfur cycle process in subsidence area of Pingyu mining area using multi-isotopes combined with hydrochemistry methods
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Abstract
Groundwater serves as an important water source for residents in and around mining areas. To achieve scientific planning and efficient utilization of water resources in mining areas, it is essential to figure out the chemical formation process and the ground water sulfur cycle that transpire after the coal mining activities. Based on studies of hydrochemistry and D,18O-H2O,34S-SO4 isotopes, this study applied principal component analysis, ion ratio and other methods in its attempts to reveal the hydrogeochemical action and sulfur cycle in the subsidence area of Pingyu mining area. The study discovered that, in the studied area, precipitation provides the major supply of groundwater and the main water chemistry effects are dominated by oxidation dissolution of sulfide minerals as well as the dissolution of carbonate and silicate rocks. The sulfate in groundwater primarily originates from oxidation and dissolution of sulfide minerals in coal-bearing strata and human activities. The mixed sulfate formed by the oxidation of sulfide minerals and by human activities continuously recharges the groundwater, promoting the dissolution of carbonate rock and silicate rock in the process.
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Keywords:
- PCA /
- Ion ratio /
- Water chemistry /
- Sulfide minerals /
- Multi-isotopes /
- Subsidence area of mining area
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References
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Su Hui-Meng, Zhang Fa-Wang, Hu Jing-Yu, Lei Jin-Feng, Zuo Wei, Yang Bo, Liu Yu-Hua. 2024. Identified the hydrochemical and the sulfur cycle process in subsidence area of Pingyu mining area using multi-isotopes combined with hydrochemistry methods. Journal of Groundwater Science and Engineering, 12(1): 62-77. doi: 10.26599/JGSE.2024.9280006
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Figure 1.
Map of geological geomorphology and sampling points in the study area
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Figure 2.
Hydrogeological profile (2008) of the study area
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Figure 3.
Piper diagram showing the chemical compositions of the groundwater
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Figure 4.
Box plot of isotope in the Study Area ((a) D; (b) 18O-H2O; (c) 34S- SO4; (d) 18O-H2O versus D values of the water samples in reference to the GMWL and LMWL)
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Figure 5.
End-element diagram of water chemistry in the study area ((a) Gibbs diagram; (b) Mg2+/Na+ and Ca2+/Na+molar ratio end element diagram）
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Figure 6.
Hydrochemical ion ratio in the study area
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Figure 7.
Relationship between 34S-SO4 and SO42−
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Figure 8.
Water level lines for karst water in mining areas and surrounding subsidence areas