大孔膦酸树脂交换吸附稀土元素性能的研究

Study on the exchange and adsorption properties of macro-porous phosphonic acid resin for rare earth elements

研究了大孔膦酸树脂从酸性介质中吸附稀土元素的性能和条件。用饱和容量法确定了树脂吸附稀土的络合比(R∶RE=3∶1)。用不同浓度的 HCl 和 NaCl 混合溶液在75分钟内定量洗脱分离了微克量的稀土 Nd 和 Er。通过树脂红外光谱的研究。推断了树脂吸附稀土的成键机理。

In this paper,the exchange and adsorptionproperties of macro-porous phosphonic acid resinfor rare earth elements in acid solutions,the condi-tions of elution for the adsorbed Nd^(3+) and Er^(3+)ions,the adsorption capacities and chelate ratiosof resin to Nd^(3+),Gd^(3+),Er^(3+) have been investi-gated.The chelate mechanism of phosphonic acidresin for Nd^(3+),Gd^(3+),Er^(3+) has also been investi-gated by means of chemical analysis and infraredspectrum.