Sorption of Zr4+ and Hf4+ onto Hydrous Ferric Oxide and Their Fractionation Behaviors: An experimental Study
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 pH＜6, the Zr/Hf ratios in solid phase decrease sharply with increasing pH values, but keep unchanged at pH＞6. In both cases, the sorption/desorption or particle/water reaction can significantly fractionate Zr/Hf in the surface environment of the Earth.
作 者： YU Wenhui LIU Congqiang 作者单位： YU Wenhui(The State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang,Guizhou 550002;Graduate School of Chinese Academy of Sciences,Beijing 100039)LIU Congqiang(The State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang,Guizhou 550002)
刊 名： 地质学报（英文版） SCI 英文刊名： ACTA GEOLOGICA SINICA 年，卷(期)： 2005 79(3) 分类号： P5 关键词： zirconium hafnium HFO sorption fractionation isovalent element