{"title":"用2-乙基己基磷酸2-乙基己基氢溶液萃取硝酸溶液中的镱","authors":"K. S. Bobrovskaya, R. A. Kuznetsov","doi":"10.1134/S1066362224060079","DOIUrl":null,"url":null,"abstract":"<p>The extraction of ytterbium from nitric acid solutions with solutions of 2-ethylhexyl hydrogen 2-ethylhexylphosphonate (HEH[EHP]) in hexane was studied. The HEH[EHP] concentration was varied from 0.5 to 2.0 M; acidity, from 0.1 to 2.0 M; and lanthanide concentration, from 0.1 to 5 g/L. The dependences of the ytterbium distribution ratio on the solution acidity are described by equations of the type log <i>D = a </i>log[H<sup>+</sup>] + <i>b</i>, where the coefficient <i>a</i> depends on the extractant and lanthanide concentrations and varies from –1.26 to –3.0. Its variation is probably caused by the occurrence of the extraction by both cation-exchange and solvation mechanism. The model describing the dependence of the ytterbium distribution ratio on its concentration in the aqueous phase at different concentrations of the extractant and acid was suggested. The data predicted by the model reasonably agree with the experimental data.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 6","pages":"835 - 845"},"PeriodicalIF":0.9000,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Extraction of Ytterbium from Nitric Acid Solutions with Solutions of 2-Ethylhexyl Hydrogen 2-Ethylhexylphosphonate in Hexane\",\"authors\":\"K. S. Bobrovskaya, R. A. Kuznetsov\",\"doi\":\"10.1134/S1066362224060079\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The extraction of ytterbium from nitric acid solutions with solutions of 2-ethylhexyl hydrogen 2-ethylhexylphosphonate (HEH[EHP]) in hexane was studied. The HEH[EHP] concentration was varied from 0.5 to 2.0 M; acidity, from 0.1 to 2.0 M; and lanthanide concentration, from 0.1 to 5 g/L. The dependences of the ytterbium distribution ratio on the solution acidity are described by equations of the type log <i>D = a </i>log[H<sup>+</sup>] + <i>b</i>, where the coefficient <i>a</i> depends on the extractant and lanthanide concentrations and varies from –1.26 to –3.0. Its variation is probably caused by the occurrence of the extraction by both cation-exchange and solvation mechanism. The model describing the dependence of the ytterbium distribution ratio on its concentration in the aqueous phase at different concentrations of the extractant and acid was suggested. The data predicted by the model reasonably agree with the experimental data.</p>\",\"PeriodicalId\":747,\"journal\":{\"name\":\"Radiochemistry\",\"volume\":\"66 6\",\"pages\":\"835 - 845\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2025-02-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Radiochemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1066362224060079\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiochemistry","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1066362224060079","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
摘要
研究了以正己烷为溶剂，用2-乙基己基磷酸氢（HEH[EHP]）溶液从硝酸溶液中萃取钇的工艺。HEH[EHP]浓度在0.5 ~ 2.0 M之间变化；酸度：0.1 ~ 2.0 M；镧系元素浓度为0.1 ~ 5 g/L。镱分布比对溶液酸度的依赖关系由log D = a log[H+] + b型方程描述，其中系数a取决于萃取剂和镧系元素浓度，变化范围为-1.26至-3.0。其变化可能是由于阳离子交换和溶剂化两种萃取机制共同作用的结果。提出了在不同萃取剂浓度和酸浓度下，水相中镱分布比随其浓度变化的模型。模型预测数据与实验数据吻合较好。
Extraction of Ytterbium from Nitric Acid Solutions with Solutions of 2-Ethylhexyl Hydrogen 2-Ethylhexylphosphonate in Hexane
The extraction of ytterbium from nitric acid solutions with solutions of 2-ethylhexyl hydrogen 2-ethylhexylphosphonate (HEH[EHP]) in hexane was studied. The HEH[EHP] concentration was varied from 0.5 to 2.0 M; acidity, from 0.1 to 2.0 M; and lanthanide concentration, from 0.1 to 5 g/L. The dependences of the ytterbium distribution ratio on the solution acidity are described by equations of the type log D = a log[H+] + b, where the coefficient a depends on the extractant and lanthanide concentrations and varies from –1.26 to –3.0. Its variation is probably caused by the occurrence of the extraction by both cation-exchange and solvation mechanism. The model describing the dependence of the ytterbium distribution ratio on its concentration in the aqueous phase at different concentrations of the extractant and acid was suggested. The data predicted by the model reasonably agree with the experimental data.
期刊介绍：
Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.
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