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本文提出用碳毡电极富集和分离稀土元素镧、镝、镱(10~(-4)—10~(-9)g/mL)。研究了富集效率、电场影响、洗脱效率、分离效率、饱和富集率和电极重现性。实验结果表明:碳毡电极对浓度为10~(-5)g/mL以下的镧、镝、镱水溶液富集效率为90.5％以上,当电场负于各元素还原电位时富集效率明显上升,反之下降。被富集元素的洗脱效率高于89.3％。对10~(-5)g/mL的上述三种元素混合液进行分离时镧、镝和镱三者的富集效率分别为3.7％、30.4％和56.4％。每克碳毡电极对镧、镝、镱的动态饱和富集车分别为0.953×10~(-3)、1.072×10~(-3)和1.089×10~9-3),静态饱和富集率分别为1.137××10~(-3)1.173×10~(-3)和1.196×10~(-3)。电极经处理后十次重复使用所测富集效率的贝塞耳标准差小于0.95％。
In this paper, it is proposed to enrich and separate lanthanum, dysprosium and ytterbium (10 ~ (-4) -10 ~ (-9) g / mL) with carbon felt electrode. The enrichment efficiency, electric field effect, elution efficiency, separation efficiency, saturation enrichment and electrode reproducibility were studied. The experimental results show that the enrichment efficiency of carbon felt electrode is more than 90.5% for the lanthanum, dysprosium and ytterbium aqueous solutions with the concentration of 10 -5 g / mL or less, and the enrichment efficiency increases obviously when the electric field is negative to each element reduction potential. Conversely drop. The elution efficiency of the enriched elements is higher than 89.3%. The enrichment efficiencies of lanthanum, dysprosium and ytterbium at the concentration of 10 ~ (-5) g / mL were 3.7%, 30.4% and 56.4%, respectively. The dynamic saturated enrichment vehicles for each carbon felt electrode were 0.953 × 10 -3, 1.072 × 10 -3 and 1.089 × 10 -3 -3, The rates were 1.137 × 10 ~ (-3) 1.173 × 10 ~ (-3) and 1.196 × 10 ~ (-3), respectively. The Bessel’s standard deviation of the enrichment efficiency measured ten times after electrode treatment was less than 0.95%.