稀土元素在玻璃和石英及塑料容器内壁上吸附研究

STUDY OF THE ADSORPTION OF RARE EARTH ELEMENTS ON THE INNER-WALL OF GLASS QUARTZ AND PLASTIC VESSELS

用原子发射光谱法 ,对不同浓度的硝酸或盐酸溶液中微量稀土离子在不同容器材料内壁上的吸附行为进行研究。结果表明 ,稀土元素在试验酸浓度范围内 (0 .1～ 3.0mol·L- 1) ,酸浓度越高 ,吸附量越少 ;在所选择的 3种材料中 ,石英材料上的吸附量最少 ,其次是玻璃 ,吸附量最多的是塑料 ;对于相同浓度的盐酸和硝酸 ,吸附量相近。

The behavior of adsorption of ions of rare earth elements on the inner wall of vessels of different materials (i.e. quartz, borosilicate glass and polyethylene) in solutions of different acidity between the range 0.1～3.0mol·L -1 (HNO 3 or HCl) was studied by AES. It was found that within the acidity range studied, the higher the acidity of the solution, less will be the amount of RE(Ⅲ) ions adsorbed, and also that least amounts of RE(Ⅲ) ions were adsorbed on quartz vessels, and highest amounts were adsorbed on polyethylene vessels. There was hardly any difference in the adsorption quantity in HNO 3 or HCl solutions of same acidity.