Mechanistic study of PFOS adsorption on kaolinite and montmorillonite

- The mechanisms of PFOS adsorption on clay minerals are examined at molecular level.
- XANEFS analysis provides direct evidence for chemical adsorption.
- FTIR spectra in situ monitors the interaction process of PFOS with clay minerals.
- PFOS could insert into the interlayers of montmorillonite.
- The HA coating decreased PFOS adsorption on kaolinite and montmorillonite.