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相关概念视频

Microbial Bioremediation of Pesticides01:28

Microbial Bioremediation of Pesticides

Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...
Production of Biopesticides01:18

Production of Biopesticides

Biopesticides offer a sustainable alternative to chemical pesticides, utilizing microbial agents to control agricultural pests. Bacillus thuringiensis (Bt) is a widely employed bacterium known for its potent insecticidal activity. Bt biopesticides are favored for their specificity to insect pests, minimal environmental impact, and natural degradability.Mechanism of Bt Toxin Action Bt produces insecticidal crystal (Cry) proteins during its sporulation phase. These proteins form parasporal...

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Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
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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
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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.

关键词:
生物固体是一种生物固体.菲普罗尔斯的角色是菲普罗尼尔是什么意思 菲普罗尼尔杀虫剂是一种杀虫剂.皮雷类的皮雷类.废水是废水,废水就是废水.

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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.