低氧条件下温度对Am(Ⅲ)在花岗岩上吸附的影响

Effect of Temperature on Sorption Behavior of Am(Ⅲ) on Granite Under Low-Level-Oxygen-Atmosphere

摘要: 研究了低氧高纯氩气氛中，不同温度下Am(Ⅲ)在甘肃北山花岗岩上的吸附。研究结果表明:北山花岗岩对Am(Ⅲ)的吸附分配系数随着温度的升高而增大，说明花岗岩对Am(Ⅲ)的吸附是吸热反应；并对可能的吸附机理进行了讨论，Am(Ⅲ)在北山花岗岩上的吸附机理主要为表面配合反应，总体表现为不可逆吸附。

Abstract: Sorption behavior of Am(Ⅲ) on granite powder in Beishan BS03 well groundwater was investigated by a batch technique in argon atmosphere at constant temperature. Experimental results show, sorption K_d values of Am(Ⅲ) on granite increase with the increase of temperature which indicates this sorption reaction is endothermic reaction. The possible sorption mechanism was discussed. The main sorption mechanism of Am(Ⅲ) on granite is surface complexation and the synthetical sorption is irreversible.