pyrifos降解及其对微塑料污染土壤中的生物利用度的影响
Lingling Ding1, Yan Wang2, Hui Ju2
1College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
Ecotoxicology and environmental safety
|April 25, 2024
概括
聚乳酸微塑料 (PLA-MPs) 影响pyrifos (CPF) 降解和土壤 (P) 的生物利用. 较高的PLA-MP度可以抑制CPF分解,影响土壤P动态和食品安全.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 农业化学 农业化学
背景情况:
- 农药残留物和微塑料 (MP) 是对土壤健康和食品安全的关键问题.
- pyrifos (CPF) 降解释放酸盐,可能与土壤中的MP相互作用.
研究的目的:
- 在不同聚乳酸MP度 (PLA-MPs) 的土壤中研究CPF降解途径.
- 分析土壤 (P) 分数和酶活动,以了解CPF和PLA-MP处理下P的生物可用性.
主要方法:
- 研究了CPF降解动力学,使用不同的CPF (6-12 mg/kg) 和PLA-MP (0.0-1.0% w/w) 水平.
- 测量了土壤中的P分量 (Olsen-P,H2O-P,NaHCO3-P,NaOH-P) 和酸酶活动.
- 监测了CPF代谢物3,5,6-三二二二 (TCP) 的度.
主要成果:
- CPF降解遵循一级衰变模型,其半衰期 (DT50) 为11.014.8天,受到PLA-MPs的影响.
- 在CPF降解后37天内观察到土壤P生物可用性的短暂增加.
- 在1.0%的PLA-MPs下抑制了CPF降解,MPs和CPF之间的相互作用在不同时间影响了土壤P分量.
结论:
- PLA-MPs可以改变CPF降解率和土壤P生物可用性.
- MP和CPF对土壤P的影响的时间表明与土壤成分和微生物的相互作用机制不同.
- 了解这些相互作用对于评估受污染的农业系统中的土壤健康和食品安全至关重要.
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