不同离子浓度对<sup>239</sup>Pu在高庙子膨润土上的吸附影响

不同离子浓度对²³⁹Pu在高庙子膨润土上的吸附影响

摘要: 采用静态吸附法研究了²³⁹Pu在CO^2-₃、HCO^-₃、SO^2-₄、Mg²⁺、Ca²⁺、Fe³⁺等不同离子浓度下在膨润土上的吸附。实验结果表明：随着CO^2-₃、HCO^-₃、Mg²⁺、Ca²⁺、Fe³⁺浓度的增大，²³⁹Pu在膨润土上的吸附分配系数K_d值逐渐减小，而随着SO^2-₄浓度的增加, K_d值先增加后减小，其中CO^2-₃、Fe³⁺浓度对K_d值影响较大。

Abstract: The adsorption behavior of ²³⁹Pu in different ionic environment onto Gaomiaozi bentonites was studied by the static adsorption method. The results show that the sorption distribution coefficient K_d values of ²³⁹Pu onto bentonites decrease with the concentrations of CO^2-₃, HCO^-₃, Mg²⁺, Ca²⁺ and Fe³⁺ increasing, and the K_d values increase first and then decrease with the concentration of SO^2-₄ increasing. The concentrations of CO^2-₃ and Fe³⁺have great effect on the adsorption of ²³⁹Pu onto bentonites.