不同离子浓度对239 Pu 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239 Pu 在 CO2-3、HCO-3、SO2-4、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 CO2-3、HCO-3、Mg2+、Ca2+、Fe3+浓度的增大,239 Pu 在膨润土上的吸附分配系数Kd 值逐渐减小,而随着 SO2-4浓度的增加,Kd 值先增加后减小,其中 CO2-3、Fe3+浓度对 Kd 值影响较大。%The adsorption behavior of 23 9 Pu 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 23 9 Pu onto bentonites decrease with the concentrations of CO2 -3 ,HCO-3 ,Mg2 + ,Ca2 + and Fe3 + increasing,and the K d values increase first and then decrease with the concentration of SO2 -4 increasing.The concentrations of CO2 -3 and Fe3 +have great effect on the adsorption of 23 9 Pu onto bentonites.