中文摘要：

利用自行开发的化学形态分析软件CHEMSPEC计算了镅在榆次地下水中的溶解度,同时研究了pH值、地下水成分、温度等因素对镅在榆次地下水中溶解度的影响.结果表明,pH值、总碳酸根离子浓度和温度对溶解度有显著影响;而硫酸根离子浓度、氯离子浓度对溶解度的影响可以忽略.计算表明,镅在榆次地下水中的溶解度在1.4×10-10-6.3×10-3mol·L-1之间.在25℃,pH=6.0时,总碳酸根离子浓度为1×10-5mol·L-1时,镅的溶解度最大,该值可用于镅在榆次浅层含水层中的扩散和迁移行为的偏保守预测.

英文摘要：

The solubility of americium in Yuci groundwater was analyzed using a newly developed geochemical code CHEMSPEC and the influence of pH,groundwater composition,and temperature on its solubility was also investigated.The results indicate that the pH,the total carbonate concentration,and the temperature have obvious influences on solubility while the sulfate and chloride concentrations do not.The solubility of americium in Yuci groundwater is 1.4× 10-10-6.3×10-3 mol·L-1.The maximum solubility was obtained at 25 ℃,pH=6.0,and a total carbonate concentration of 1×10-5 mol·L-1.These data can be used to predict the diffusion and migration behavior of americium in the aquifer.