|
| Effects of high arsenic groundwater irrigation on As migration in salinized farmland |
| Received:May 25, 2024 |
| View Full Text View/Add Comment Download reader |
| KeyWord:high arsenic groundwater;soil solution;migrate;As;salinization of the soil |
| Author Name | Affiliation | E-mail | | ZHENG Yuhong | College of Resource and Environment, Xinjiang Agricultural University, Urumqi 830052, China | | | LUO Yanli | College of Resource and Environment, Xinjiang Agricultural University, Urumqi 830052, China | luoyanlimail@sina.com | | CHAO Bo | College of Resource and Environment, Xinjiang Agricultural University, Urumqi 830052, China | | | DONG Lele | College of Resource and Environment, Xinjiang Agricultural University, Urumqi 830052, China | | | SONG Zhen | College of Resource and Environment, Xinjiang Agricultural University, Urumqi 830052, China | | | WANG Meijuan | College of Resource and Environment, Xinjiang Agricultural University, Urumqi 830052, China | |
|
| Hits: 158 |
| Download times: 225 |
| 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. |
|
|
|
