应用溶解扩散模型预测钴的渗透行为

Application of Solution-Diffusion Model in Removal of Cobalt Ions by Reverse Osmosis

应用溶解扩散模型预测反渗透去除放射性废水溶液中钴的渗透行为.研究了低浓度钴离子的渗透行为,结合溶解扩散模型和物料平衡,推导出渗透分离的方程.首先通过拟合较高浓度钴离子渗透的实验数据,求得模型的相关参数,然后针对较低浓度钴离子的渗透实验数据,与模型预测数据进行对比.结果显示,实验数据与模拟数据相对误差不超过15%,该溶解扩散模型可以很好地预测较低钴离子浓度下的渗透行为.

The solution-diffusion model was used to predict the behavior of reverse osmosis membrane, when used for the removal of cobalt from radioactive wastewater. System mass balances together with tion-diffusionmass transfer models were used to simulate the separation process of low concentrations of cobalt. Model equation constants were obtained when the cobalt concentration was high, and the experimental data were then compared with simulated data when the cobalt concentration was low. The results show that the relative error between experimental data and simulated data does not exceed 15G. Good agreement between the experimental and the predicted cobalt concentrations suggests that the solution-diffusion model can be used to well predict osmotic concentration even when the concentration of cobalt is low.