对一种被动采样装置的分析,以评估沉积物中的和多基基物质的行为
Hossein D Atoufi1, David J Lampert1
1Department of Civil, Architectural, and Environmental Engineering, Illinois Institute of Technology, Chicago, Illinois, USA.
Environmental toxicology and chemistry
|June 28, 2023
概括
一个经过修改的被动采样器有效地测量了沉积物和水中的每和多基物质 (PFAS) 的吸收. 该工具有助于了解PFAS生物积累,并支持环境修复工作.
科学领域:
- 环境化学环境化学
- 环境科学 环境科学
- 分析化学 分析化学
背景情况:
- 和多醇基物质 (PFAS) 构成全球健康和环境风险.
- 在水生生物和沉积物中的PFAS生物积累是一个重大问题.
- 需要有效的工具来评估 PFAS 在水生环境中的生物积累潜力.
研究的目的:
- 调整和评估一个修改的极地有机化学集成采样仪 (POCIS),用于评估从沉积物和水中吸收PFAS.
- 调查水生系统中 perfluorooctanoic 酸 (PFOA) 和 perfluorobutane 硫酸 (PFBS) 的生物积累潜力.
- 开发一种测量孔水度和沉积物释放PFAS的方法.
主要方法:
- 使用了一种经过修改的POCIS被动采样器,用于沉积物和水部署.
- 部署采样者在含有PFAS的水,土壤 (4%有机物) 和燃烧土壤 (低有机碳) 的中28天.
- 应用了质量运输模型来分析PFAS吸收动力学和沉积层中的外部阻力.
主要成果:
- 从水中吸收的PFAS与以前的采样率模型保持一致.
- 沉积物PFAS吸收被外部质量运输模型准确地描述.
- perfluorobutane sulfonic acid (PFBS) 的吸收速度比 perfluorooctanoic acid (PFOA) 快,特别是在燃烧的土壤中;观察到的化合物竞争最小.
结论:
- 修改后的POCIS设计有效地测量PFAS孔水度和沉积物释放.
- 外部质量传输模型为了解沉积物中PFAS吸收提供了一个强大的框架.
- 这种方法为环境监管机构和参与PFAS补救策略的利益相关者提供了有价值的工具.
关键词:
质量转移模型 质量转移模型被动采样器是一种被动采样器.-和多基基物质 (PFAS) 的使用.perfluorobutane 硫酸 (PFBS) 是一种具有性质的硫酸.perfluorooctanoic 酸 (PFOA) 是一种含有多酸的化合物.沉积物的沉积物更多相关视频
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