在时间可变的水性度下对水友化合物的被动采样进行建模
Benjamin Becker1, Christian Kochleus2, Denise Spira2
1Federal Institute of Hydrology (BfG), Am Mainzer Tor 1, 56068, Koblenz, Germany. benjamin.becker@bafg.de.
Environmental science and pollution research international
|August 11, 2024
概括
被动采样器有效地捕获水友性有机化合物在水中,即使有间歇性排放. 具有膜的和SDB-RPS采样器表现最好,显示了环境监测的适当时间整合能力.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 水上科学 水上科学
背景情况:
- 被动采样对于评估水友性有机化合物在水生环境中至关重要.
- 了解间歇性排放的被动采样器性能至关重要,但有限.
- 时间变化的度对准确的环境监测提出了挑战.
研究的目的:
- 评估在时间变化的度下被动采样器的性能.
- 为了比较用于捕获间歇性排放的板和SDB-RPS磁盘 (带/不带膜).
- 评估采样率和扩散模型对分析被动采样数据的充分性.
主要方法:
- 半场实验是在31立方米的管道中进行的,流速各不相同.
- 板和SDB-RPS磁盘 (带有/没有聚硫膜) 暴露于度波动.
- 通过采样率和扩散模型分析数据,以考虑时间变量的度.
主要成果:
- 扩散模型提供了一个比采样率模型稍微更好的匹配,尽管差异很小.
- 带有聚硫膜的SDB-RPS采样器表现出最佳性能,采样速率范围较窄.
- 生物污染效应在各个化合物中是一致的,相当于150微米层.
结论:
- 被动采样器,特别是带膜的SDB-RPS,尽管有间歇性排放,但足够捕获水友性有机化合物.
- 采样率模型足以评估这些样本的时间整合能力.
- 进一步的研究可以完善对动态水生系统中被动采样的理解.
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