Different modes of adsorptions of arsenate on silica grafted with Fe3+-coordinated silanes

- Fe3+-aeaptes complexes were grafted on mesoporous silicas with varying Fe: aeaptes.
- Stoichiometric adsorptions were found at As/Fe = Fe: aeaptes on the above adsorbents.
- When using Cab-O-sil, no such difference was found in the stoichiometry of As/Fe.
- The change in Langmuir plot was found in the case of Fe: silane = 1:1 on MCM-41.
- The structure of adsorption site was analyzed by XAS.