Sorption of Zr^(4+) and Hf^(4+) onto Hydrous Ferric Oxide and Their Fractionation Behaviors:An experimental Study

摘要

An experimental study was carried out on the sorption of tetravalent ions Zr4+ and Hf4+ onto hydrous ferric oxide (HFO) and their fractionation behavior during colloid/solution interaction. The sorption of the isovalent ions Zr4+ and Hf4+ onto HFO is nonlinear, and they are fractionated during the sorption and co-precipitation processes: Zr4+ is more affinitive for HFO than Hf4+. At pH6. In both cases, the sorption/desorption or particle/water reaction can significantly fractionate Zr/Hf in the surface environment of the Earth.