在田的土壤-水界面上,在干旱后的补水过程中,对基和多基物质的补偿释放
Jianyi Wu1, Lingxuan Li2, Miao Chen2
1Key Laboratory of Poyang Lake Watershed Agricultural Resource and Ecology of Ministry of Agriculture and Rural Affairs, College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045, China; Technology Innovation Center for Land Spatial Ecological Protection and Restoration in Great Lakes Basin, Ministry of Natural Resources, China.
Journal of hazardous materials
|November 11, 2025
概括
干旱后的再生水分释放短链的基和多基物质 (PFAS) 进入上层水域,影响农业安全. 像7-chloro-L-tryptophan这样的关键代谢物影响了这种PFAS迁移.
科学领域:
- 环境化学环境化学
- 农业科学 农业科学
- 生态毒理学 生态毒理学
背景情况:
- 和多基物质 (PFAS) 的污染和干旱事件威胁着农业生态系统.
- 了解干旱后补水 (PDR) 期间的PFAS迁移对于土壤和水安全至关重要.
研究的目的:
- 在PDR条件下研究在米土壤中的PFAS转移机制.
- 确定非生物和生物因素对PFAS迁移的影响.
- 确定调节PFAS土壤-水界面动态的关键代谢物.
主要方法:
- 在PDR下研究了PFAS在不同土壤部分 (OW,土壤溶液,SM,OF) 的转移.
- 利用非向的土壤代谢学来识别关键代谢物.
- 进行验证实验以确认代谢物对PFAS释放的影响.
主要成果:
- 在PDR (2.6911.07μg/L/day) 下观察到大量的短链PFAS释放到上层水中.
- 干旱加快了OW中短链PFAS的分布,并抑制了土壤的保留.
- 确定了7-chloro-L-tryptophan和N-acetyl-L-phenylalanine作为影响PFAS迁移的关键代谢物.
结论:
- PDR显著改变了在米土壤中的PFAS迁移模式,而短链PFAS更具流动性.
- 无生物和生物因素都调节PFAS迁移,生物因素在长链PFAS中占主导地位.
- 代谢驱动的PFAS释放突出了干旱影响农业地区污染控制的新目标.
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