在生物固体中表征甲酸和菲普罗尼尔度.
John Wheeler1, Gabrielle P Black2, Michelle L Hladik2
1California Department of Pesticide Regulation, California Environmental Protection Agency, 1001 I Street, Sacramento, CA 95812, USA.
The Science of the total environment
|March 1, 2025
概括
污水处理厂将农药释放到生物固体和水中. 虽然fipronil和pyrethroids是常见的,但与农业用途相比,它们在土地应用的生物固体中的含量是最小的,这表明目前的法规是保护性的.
科学领域:
- 环境化学环境化学
- 环境科学 环境科学
- 水的质量 水的质量
背景情况:
- 在废水中经常检测到杀虫剂.
- 有限的研究同时测量了生物固体和水性介质中的农药.
- 了解废水处理厂 (WWTP) 中农药的命运对于环境风险评估至关重要.
研究的目的:
- 量化来自加利福尼亚州 WWTPs 的生物固体和水样中的农药度.
- 研究废水处理过程中的农药转化途径.
- 评估陆地应用生物固体产生的农药对环境的负荷.
主要方法:
- 同时采集来自加利福尼亚州17个WWTP的生物固体,进水和废水的样本.
- 使用染色学分析生物固体中的27种农药和水样中的23种农药.
- 在样本类型中对农药数据进行比较,以推断转化途径.
- 在WWTP特征,生物固体有机碳和农药度之间的相关性分析.
主要成果:
- 在27种分析的化合物中,16种在生物固体中检测到;10种的检测频率 (DF) ≥25%.
- 经常检测到fipronil转化产品 (fiproles) 和 pyrethroids (例如,氨酸,双氨酸).
- 在治疗过程中观察到农药的转化,在这个过程中形成了一些fiproles.
- 生物固体中双氨酸和氨酸的质量负荷比农业投入低2-3个数量级.
结论:
- 废水处理过程有助于杀虫剂的转化和分解为生物固体.
- 在土地应用的生物固体中,农药度明显低于直接农业应用.
- 现有的农业农药法规可能会防止与生物固体应用相关的风险.
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