Figure 7
From: Sorption of phosphate onto mesoporous γ-alumina studied with in-situ ATR-FTIR spectroscopy

Possible molecular configurations of P inner-sphere complexes on the alumina-water interface at various pH values; a) nonprotonated monodentate, b) monoprotonated monodentate, c) diprotonated monodentate, d) nonprotonated bidentate binuclear, e) monoprotonated bidentate binuclear.