SiO_2纳米干凝胶对锆的动态吸附

Dynamic Adsorption of Zr on the Silica Xerogels

研究了模拟高放废液中的锆在成型后的SiO2 纳米干凝胶上的动态吸附行为。结果表明 :低流速、温度低、酸度高、SiO2 干凝胶的颗粒小时 ,交换柱穿透得较慢 ;反之 ,穿透较快。SiO2 纳米干凝胶对Zr的吸附选择性高 ,模拟高放废液中的Fe和Mo略有吸附 ,其它元素不被吸附。

The dynamic adsorption behavior of Zr on silica xerogel with a size of nano meter and the selective adsorption of Zr from simulated high level liquid waste are studied experimentally. Decreasing flow velocity and acidity of adsorbed solution and increasing temperature are favorable for the adsorption of Zr, and the smaller particle size of silica xerogel causes the lesser breakthrough volume of adsorption column for Zr. The Zr in simulated high level liquid waste can selectively adsorbed on the silica xerogel column, while the adsorption from others can ignore except for Fe and Mo.