Adsorption of perfluoroalkyl acids onto aquifer materials with varied composition

Zhao, Yanan

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https://hdl.handle.net/2142/121781 Copy

Description

Title

Adsorption of perfluoroalkyl acids onto aquifer materials with varied composition

Author(s)

Zhao, Yanan

Contributor(s)

• Wang, Yin
• Xu, Shangping

Issue Date

2023-04-19

Keyword(s)

• PFAS
• aquifer materials
• adsorption

Geographic Coverage

Wisconsin, United States

Abstract

Per- and polyfluoroalkyl substances (PFAS) are a large class of synthetic organic chemicals used in a variety of applications. Many PFAS, particularly perfluoroalkyl acids (PFAAs), are very persistent in nature and have been widely detected in groundwater aquifers. In this study, we investigated the adsorption of representative PFAAs onto aquifer materials collected in several sites in Wisconsin under environmentally relevant concentrations. Results from batch experiments showed that aquifer material composition strongly affected PFAS adsorption. In particular, PFAS adsorption affinity increased with higher dolomite contents of aquifer materials. Additionally, PFAS adsorption was also related to their octanol-water distribution coefficients (Dow). A multilinear regression model was successfully employed to estimate PFAS adsorption affinity based on dolomite content of aquifer material and Log Dow of PFAS. The varied PFAS adsorption was directly related to their distinct transport behaviors in different aquifers, as illustrated in one-dimensional transport model. Our results suggested that composition of aquifer material played an important role in PFAS adsorption, and thus can strongly affect PFAS transport and retardation in groundwater aquifer.

Has Part

https://youtu.be/QwqtPBTcdt4

Series/Report Name or Number

2023 Emerging Contaminants in the Environment Conference

Type of Resource

• text
• moving image

Language

eng

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