变量水化学对PFOS-Goethite相互作用的影响:实验证据和表面复杂化建模
Jacopo Cogorno1,2, Massimo Rolle1,3
1Department of Environmental and Resource Engineering, Technical University of Denmark, Miljøvej, Building 115, 2800 Kgs. Lyngby, Denmark.
Environmental science & technology
|January 11, 2024
概括
perfluorooctanesulfonate (PFOS) 通过键和外层球体复合体与石结合. 溶液化学,如pH和离子强度,显著影响这些结合机制,影响PFOS的环境命运.
科学领域:
- 环境化学环境化学
- 地质化学 地质化学
- 表面化学 表面化学
背景情况:
- perfluorooctanesulfonate (PFOS) 是一种持久性环境污染物,具有显著的毒性作用.
- 了解PFOS与矿物表面的相互作用对于预测其环境行为至关重要.
研究的目的:
- 为了研究PFOS在戈伊表面的吸附机制.
- 为了确定不同水化学 (pH,离子强度) 对PFOS吸附的影响.
主要方法:
- 用受控的pH值,离子强度和PFOS度进行吸附实验.
- 红外 (IR) 光谱仪用于表面分析.
- 表面复杂化建模以阐明结合机制.
主要成果:
- PFOS通过强结合 (HB) 复合物和较弱的外层球体复合物 (OS-Na+) 结合于戈伊.
- 酸性条件和低离子强度有利于HB复合体的形成.
- 较高的电解质度和pH值促进了三元 PFOS-Na+-goethite外球复合物的形成.
结论:
- 溶液化学批判性地控制了PFOS在矿物表面上的吸附.
- 准确预测PFOS流动性需要采用机械细节的表面复杂化模型.
关键词:
美国的FTIR是FTIR.在PFOS吸附过程中,PFOS吸附静电相互作用 静电相互作用哥斯提人 (Goethite) 是一个哥斯提人.离子强度的离子强度它们的pH值为pH.表面复杂化建模的模型.更多相关视频
08:21Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
Published on: May 18, 2018
14.6K
09:04Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
Published on: April 18, 2019
12.5K
相关概念视频
04:01Factors Affecting Solubility
33.5K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
33.5K
00:56Extraction: Advanced Methods
447
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
447