相关实验视频

Updated: Jul 4, 2025

Analysis of Organochlorine Pesticides in a Soil Sample by a Modified QuEChERS Approach Using Ammonium Formate

Analysis of Organochlorine Pesticides in a Soil Sample by a Modified QuEChERS Approach Using Ammonium Formate

Published on: January 20, 2023

在欧洲大气中广泛分布的农药质疑它们在空气中的降解性

Ludovic Mayer¹, Céline Degrendele^1,2, Petr Šenk¹

¹Faculty of Science, RECETOX, Masaryk University, Brno 602 00, Czech Republic.

Environmental science & technology

|February 7, 2024

概括

大气中的农药降解率可能被高估,影响环境风险评估. 这项研究发现,在欧洲农药存在广泛,有22种物质能够远程运输,这突显了大气持久性的低估.

科学领域:

环境化学环境化学
大气科学大气科学
生态毒理学生态毒理学

背景情况:

目前的农药风险评估依赖于大气降解率的估计.
最近的研究表明,这些降解率可能被高估,可能会损害监管准确性.
了解大气中的农药行为对于评估对偏远生态系统的影响至关重要.

研究的目的:

为了研究76种农药在欧洲不同地点的大气度.
为了确定易于远程大气传输 (LRAT) 的农药.
评估特定农药在大气中的持久性,并为风险评估的改进提供信息.

主要方法:

在农业季节期间,在欧洲29个不同地点 (农村,沿海,山区,极地) 采集76种农药的大气样本.
在自由热带大气和北极地区对农药度的分析.
偏远地区的度与农药来源地区的度的比较.

主要成果:

在研究的76种农药中,有58种在欧洲大气中被检测到.
7种农药的低空间变化表明大陆范围的大气分散.
22种农药,包括农业和禁止物质,被确定为易受LRAT.
六种特定的农药 (atrazine,cyprodinil,spiroxamine,tebuconazole,terbuthylazine, thiacloprid) 显示出长时间存在大气中的证据.

结论:

杀虫剂的大气传输和持久性可能被低估了.
目前的农药风险评估方法需要大幅改进,以考虑观察到的大气行为.
农药在大气中的广泛存在和LRAT对遥远的生态系统构成风险.

关键词:

大气层的大气层是大气的组成部分.降解降解降解降解降解.杀虫剂杀虫剂杀虫剂风险评估风险评估风险评估交通运输运输运输运输运输运输运输运输运输

更多相关视频

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

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

Published on: May 15, 2017

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis

Published on: July 1, 2017

相关概念视频

Types of Toxins

Types of Toxins

Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.