Fig. 8From: Cesium-adsorption mechanisms of woody charcoal discussed on the basis of its functional groups and nanostructureStructures of surface Cs+ complexes for a–c inner-sphere complexes, d, e outer-sphere complexes. Black wavy line: surface of charcoal, red hashed line: ionic bond, green hashed line: coordinate or hydrogen bond, green H2O: coordinated water molecule, blue OH: non-ionized OH group on surface, red O−: ionized OH group on surfaceBack to article page