[1]Chen Jia,Fan Pingping,Long Wentao,et al.Research Progress in Mechanism of Impact of Soil Erosion on Heavy Metal Migration[J].Research of Soil and Water Conservation,2024,31(01):460-470.[doi:10.13869/j.cnki.rswc.2024.01.001]
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 01
Page number:
460-470
Column:
Public date:
2024-02-20
- Title:
-
Research Progress in Mechanism of Impact of Soil Erosion on Heavy Metal Migration
- Author(s):
-
Chen Jia, Fan Pingping, Long Wentao, Tai Liang
-
(College of Agriculture, Guizhou University, Guiyang 550025, China)
-
- Keywords:
-
soil erosion; heavy metal migration; sediment particle; speciation of heavy metal
- CLC:
-
S157.1; X53
- DOI:
-
10.13869/j.cnki.rswc.2024.01.001
- Abstract:
-
[Objective] The aims of this study are to reveal the migration rule of heavy metals under soil erosion, clarify the migration mechanism of heavy metals under soil erosion, and provide scientific guidance for the prevention and control of heavy metal pollution. [Methods] Based on the domestic and foreign articles on the migration of heavy metals under soil erosion, the role of soil erosion on the migration of heavy metals was systematically summarized from three aspects: soil properties, heavy metal properties, and environmental factors. [Results](1)Under erosion, the soil heavy metals mainly migrate horizontally and vertically in the form of particles, and the dissolved heavy metals account for a small proportion but have strong activity. The sediment characteristics of the sediment area caused by erosion are different from those of the soil in the erosion area, which may affect the spatial distribution pattern of heavy metal enrichment characteristics.(2)The higher the soil pH, organic matter, and clay content, the stronger the ability to adsorb heavy metals, and the weaker the ability of heavy metals to be released and migrated.(3)The speciation of heavy metals in soil plays an important role in their migration form. Generally, dissolved heavy metals mainly come from the available form, while relatively stable residual forms usually migrate in the particulate form.(4)Environmental factors such as rainfall, terrain, and vegetation affect the migration process of sediment particles, and prioritize the migration of fine particles, resulting in a certain variation pattern of sediment particle size distribution along the migration path. [Conclusion] Heavy metal migration under erosion is affected by soil/heavy metal properties and environmental factors. Future research can focus on: the impact of soil erosion on the migration process of heavy metals under different geological backgrounds and pollution causes; study on the heterogeneity of heavy metal speciation in soil particles with different particle sizes; the mechanism of underground leakage in karst areas on the migration of heavy metals, and the distribution mechanism of heavy metal surface loss and underground leakage under different erosion conditions.