高砷地下水灌溉对As在盐渍化农田土壤中迁移的影响

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中图分类号：X53；S156.41 文献标志码：A 文章编号：1672-2043（2025）05-1256-10 doi：10.11654/jaes.2024-0438

Abstract：In order to study the migration characteristics of As in salinized farmland soil after high arsenic groundwater irrigation， clarify the horizontal and vertical migration distances of As in farmland soil， reveal the migration process of As in farmland soil， and correctly control soil As pollution， in this study， we took the cotton field of the Kuitun 126 Regiment in Xinjiang as the research object， we explored the horizontal and vertical migration characteristics of As in moderately and severely salinized soil under different irrigation cycles according to the local strength of environmental evaporation background and salinized soil characteristics. The results showed that after irrigation of high arsenic groundwater， the concentration of As in the soil solution of each soil layer at（0， 20] cm showed a gradually decreasing trend within 8 h， and the As in groundwater was adsorbed by soil particles resulting in a progressively decreasing As concentration change in the soil solution. The As concentration of soil solution in（0， 10] cm soil layer was significantly higher than that in （10， 20] cm. With the increase in irrigation time， the mass concentration of As in the soil solution increased. The concentration of As in the soil solution of severely salinized soil was higher than that in the solution of moderately salinized soil. As mainly migrated to 3.8 cm horizontally and 4.0 cm vertically in moderately salinized soil. In heavily salinized soils， arsenic migrates to 6.0 cm and 8.0 cm horizontally and vertically. After 5 weeks of irrigation， As concentration in groundwater accumulated in the soil， the growth rate of As concentration in moderately salinized soil was the highest at（0， 5] cm， and the growth rate of As concentration in severely salinized soil was the highest at（5， 10] cm. The salinity in the soil will promote the migration of As in the vertical and horizontal distances， and more attention should be paid to the environmental risks of high-arsenic groundwater irrigation in salinized farmland soil.

Keywords：high arsenic groundwater; soil solution; migrate; As; salinization of the soil

砷（As）是自然界中一种广泛存在的类金属元素，主要分布在岩石、土壤和水环境中[1-2]。（剩余19315字）