1.The enthalpy change ?△H O? of sorption is 17.6 kJ·mol -1 . Coordination molar ratio of the functional group of APAR to Yb(Ⅲ) is 2∶1. The sorption mechanism shows that the nitrogen and oxygen atoms of the functional group of APAR coordinate with Yb(Ⅲ) to form coordination bond.
