| Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences | Host |
| Groundwater Science and Engineering Limited | Publish |
| Citation: |
Dong Qiu-yao, Xiang Jiao, Song Chao, Wang Pan, Wen Hao-tian, Yan Ming-jiang. 2022. Spatial distribution characteristics and main controlling factors of germanium in soil of northern Dabie Mountains, China. Journal of Groundwater Science and Engineering, 10(4): 381-392. doi: 10.19637/j.cnki.2305-7068.2022.04.006
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Spatial distribution characteristics and main controlling factors of germanium in soil of northern Dabie Mountains, China
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Abstract
With the increasing application of germanium (Ge) elements in modern industry, military and medical health industries, especially with the growing demand for Ge-rich agricultural products, the study of Ge-rich soil has become particularly important, but the enrichment pattern and control factors of Ge-rich soil are still not well understood due to the high dispersion and high migration of Ge-rich soil. In this paper, 495 surface soil (0–20 cm) and 149 deep soil (150–200 cm) samples were collected from the northern foothills of Dabie Mountain using a double-layer grid layout, and the spatial distribution and enrichment characteristics of Ge were studied by high-resolution method, and the controlling factors affecting the distribution of Ge-rich soil was analyzed by geo-statistics and spatial analogy. The results show an average Ge content of 1.34 mg/kg for the surface and 1.36 mg/kg for the deep soil. In the assessment grade classification of surface and deep soil for Ge, the abundant and sub-abundant grades account for 37.97% and 31.70%, respectively, covering 752 km2 and 634 km2. Surface Ge-rich regions are distributed in concentrated strips in the north-central part of the studied region, and there is no clear pattern in the spatial distribution of deep soils. In the areas under study, such as Fenlukou, Dingji, and Jiangjiadian, the surface soil is very rich in Ge and has a high enrichment factor, which is valuable for agricultural development. In surface soils, river deposits and shallow metamorphic rock parent materials have the highest content of Ge, while in deep soils, the highest content has been found in the parent material of moderately acidic rock. Both surface and deep soils have the highest Ge content in purple paddy soils and plain areas. The source of Ge in the soils of the study area is most influenced by the lithology of the soil-forming parent material, while the distribution of Ge in the surface soils is jointly influenced by pH, SiO2, TFe2O3, and Al2O3 in the soil. This study has implications for understanding the enrichment pattern of Ge in soil and its controlling factors as well as for the development of Ge-rich agricultural products.
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Keywords:
- Germanium /
- Soil /
- Enrichment feature /
- Distribution characteristics /
- Influencing factors
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References
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Dong Qiu-yao, Xiang Jiao, Song Chao, Wang Pan, Wen Hao-tian, Yan Ming-jiang. 2022. Spatial distribution characteristics and main controlling factors of germanium in soil of northern Dabie Mountains, China. Journal of Groundwater Science and Engineering, 10(4): 381-392. doi: 10.19637/j.cnki.2305-7068.2022.04.006
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Figure 1.
Location of the study area and distribution of sampling sites
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Figure 2.
Location of sampling sites in the study area
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Figure 3.
Frequency distribution of Ge content in soils at different depths in the study area
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Figure 4.
Spatial distribution of Ge content in surface (left) and deep (right) soils in the study area
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Figure 5.
Spatial distribution of germanium enrichment in soils of the study area
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Figure 6.
Distribution of soil parent material in the study area
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Figure 7.
Distribution of soil types in the study area (left) and topographic map of the study area (right)
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Figure 8.
Distribution of single indicators of (a)TFe2O3、(b)Al2O3、(c)Corg、(d)SiO2