Isotherms and kinetics of cesium and strontium sorption by selected subtropical and tropical soils around nuclear facilities
Little is known about the dynamics of cesium (Cs) and strontium (Sr) sorption by short-range order (SRO) organo-sesquioxide complexes in tropical and subtropical soil. Here, we determined isotherms and kinetics of Cs and Sr sorption by selected highly weathered subtropical and tropical soils in Taiwan. The amounts of pyrophosphate extractable Al (Alp) and Fe (Fep) were well correlated with Cs and Sr sorption capacities (Cs sorption: γ<2>= 0. 97, P<1. 0×10-4; Sr sorption:γ<2>=0. 82, P<1. 0×10-3) The activation energy (ΔEa <22. 7kJ·mol<1>) of Cs and Sr sorption determined from the temperature dependence of the reaction rate indicated that the limiting step was a diffusion-controlled process. The high values found for the sorption capacities suggest that short-range order (SRO) sesquioxides play an important role in the dynamics and fate of Cs and Sr in subtropical and tropical soils.
Kinetics organically bound aluminum and iron oxides radionuclides short-range order sesquioxides sorption isotherms
P. N. Chiang M. K. Wang P. M. Huang J. J. Wang
Department of Agricultural Chemistry, National Taiwan University, 106, Taipei, Taiwan Department of Soil Science, University of Saskatchewan, Saskatoon, SK, Canada 57H 4A5 Institute of Nuclear Energy Research, Taoyuan, Taiwan
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
386-387
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）