摘要
通过静态吸附实验研究了不同条件下聚氨酯泡沫塑料对Au(Ⅲ)的吸附动力学,并运用3种动力学方程拟合,分析了吸附动力学机制。研究结果表明:聚氨酯泡沫塑料吸附Au(Ⅲ)过程中,反应30 min基本达到吸附平衡,平衡吸附量随着温度的升高而降低;吸附过程符合准二级动力学方程,主要以物理吸附为主,吸附速率由颗粒内扩散和膜扩散共同控制。该研究对聚氨酯泡沫塑料法富集金的应用和改进具有指导意义。
The kinetics of Au（ Ⅲ） ions adsorption on polyurethane foam was investigated in this study using the static experiments at different conditions. The adsorption mechanism was investigated with the fitting of 3 kinetics equations. The research results showed that the adsorption capacity of polyurethane foam tended to reach equilibrium after 30 min,and the equilibrium adsorption volume decreased with increasing temperature; and the adsorption process,which was mainly a physical process,could be better described by the quasi second-order kinetics equation. The adsorption rate was jointly controlled by intra-particle diffusion and membrane diffusion. The research has guiding significance in the application and renovation of polyurethane foams to gold enrichment.
出处
《黄金》
CAS
2017年第9期80-83,87,共5页
Gold
