某盐湖水中铀的形态分布研究

Research on Speciation of Uranium in Saline-water

将盐湖水中主要阴、阳离子的浓度输入PHREEQC形态模拟计算软件,通过pH值、温度、离子强度等因素改变对铀形态的影响计算得出：铀离子与碳酸根离子结合的络合物是盐湖水中铀的主要存在形态,并会随着溶液pH值的变化而改变。盐湖水的pH值在8-10之间变化时,UO2（CO3）4-3为铀酰离子在盐湖水中的主要存在形态。

The content of main anion and cation in the saline lake water were inputed into PHREEQC simulation software for analog computation. By changing the factors such as p H,temperature,ionic strength,the impact on uranium chemical speciation is calculated,resulting that the main form existent in the lake was a complex of uranium and carbonate ion,which could vary with the p H of the solution. Generally,the p H of the lake water ranges from 6 to 8,and the main form of uranyl ion in the saline lake water is UO2（ CO3）4-3.