Extraction of ytterbium from nitric acid with hexane solutions of 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester
- 作者: Bobrovskaya K.S.1, Kuznetsov R.A.1
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隶属关系:
- Kapitsa Research Institute of Technology, Ulyanovsk State University
- 期: 卷 66, 编号 6 (2024)
- 页面: 566-576
- 栏目: Articles
- URL: https://ruspoj.com/0033-8311/article/view/681270
- DOI: https://doi.org/10.31857/S0033831124060078
- ID: 681270
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详细
The extraction of ytterbium with solutions of mono(2-ethylhexyl) ether of 2-ethylhexylphosphonic acid (HEH[EHP]) in hexane from nitric acid solutions at an HEH[EHP] concentration of 0.5–2.0 mol/L, acidity of 0.1–2.0 mol/L, and lanthanide concentration from 0.1 to 5 g/L was studied. It is shown that the dependences of the ytterbium distribution coefficients on the acidity of the solution are described by expressions such as logD = alog[H+] + b, with the value of the coefficient a depending on the extractant and lanthanide concentrations and varying in the range from –1.26 to –3.0. The probable cause is extraction by both cation-exchange and solvation mechanisms. A model describing the dependence of the ytterbium distribution coefficient on its concentration in the aqueous phase at various extractant concentrations and acidities is proposed. The model reasonably agrees with the experimental data.
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作者简介
K. Bobrovskaya
Kapitsa Research Institute of Technology, Ulyanovsk State University
编辑信件的主要联系方式.
Email: rostislavkuznetsov@yandex.ru
俄罗斯联邦, Ulyanovsk
R. Kuznetsov
Kapitsa Research Institute of Technology, Ulyanovsk State University
Email: rostislavkuznetsov@yandex.ru
俄罗斯联邦, Ulyanovsk
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