Abstract
Considering the eastern part of Hunan Province as the research area, 34 sampling sites were set up, 198 samples were collected from representative paddy soil, the distribution characteristics of antimony (Sb) were studied. The results showed that: (1) The content of Sb on the surface of paddy soil ranging from 0.07 to 11.00 mg/kg and the geometric mean was 1.56 mg/kg. (2) The distribution of contents of Sb in paddy soil in different areas was shown as Yueyang > Changsha > Zhuzhou > Xiangtan. (3) Sb showed a strong migration in paddy soil in the research area and its content increased initially and then decreased or gradually decreased with the increase of profile depth. (4) The content of Sb in the substratum was significantly affected by parent materials.
Highlights
The heavy metal elements in soils have shown the characteristics of low degradability, intensive perniciousness, high crypticity, and complicated ecological effects, which brought adverse effects to ecological environment and human health
These research studies on the distribution characteristics of heavy metals and potential ecological hazards in agricultural soils are of great importance to ensure normal agricultural production activities
If the mean content of Sb is presented as arithmetic mean, the content of Sb of paddy soil in the research area will be artificially increased
Summary
The heavy metal elements in soils have shown the characteristics of low degradability, intensive perniciousness, high crypticity, and complicated ecological effects, which brought adverse effects to ecological environment and human health. These research studies on the distribution characteristics of heavy metals and potential ecological hazards in agricultural soils are of great importance to ensure normal agricultural production activities. The content of Sb in soil crept up gradually owing to the mining and mineral utilization in recent years, which threatened human health and the safety of the ecological system, and gradually drawing our attention. Most research reports of Hunan Province about soil Sb focused on the mining areas (Wang et al, 2010; Li et al, 2017), while only a few reports on the content of Sb in soils far away from mining areas. The research on the distribution characteristics and migration of Sb in paddy soil of eastern Hunan Province is of great importance, it can offer basic information about the safe utilization of paddy soil and food security
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