{"title":"化学成分复杂的水溶液中痕量浓度铀的标示","authors":"F. F. Faizrakhmanov","doi":"10.1134/S1066362224020164","DOIUrl":null,"url":null,"abstract":"<p>Speciation of uranium in trace concentrations in water of complex chemical composition was studied using ultrafiltration and sorption methods in a wide range of solution acidity. As shown by the experiments and computations, uranium in trace concentrations in aqueous solutions identical to wastewater from the facilities occurs at pH 1–3 in the truly dissolved state in the form of UO<sub>2</sub><sup>2+</sup> and UO<sub>2</sub>OH<sup>+</sup> ions. At pH ≥ 4, uranium(VI) mainly occurs in the pseudocolloidal form due to sorption on hydroxides of iron, aluminum, or other impurity elements. The decrease in the fraction of uranium colloids at pH ≥ 7 is due to the formation of stable, negatively charged uranyl carbonate complexes in the solution.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"66 2","pages":"268 - 273"},"PeriodicalIF":0.9000,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Speciation of Uranium in Trace Concentrations in Aqueous Solutions of Complex Chemical Composition\",\"authors\":\"F. F. Faizrakhmanov\",\"doi\":\"10.1134/S1066362224020164\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Speciation of uranium in trace concentrations in water of complex chemical composition was studied using ultrafiltration and sorption methods in a wide range of solution acidity. As shown by the experiments and computations, uranium in trace concentrations in aqueous solutions identical to wastewater from the facilities occurs at pH 1–3 in the truly dissolved state in the form of UO<sub>2</sub><sup>2+</sup> and UO<sub>2</sub>OH<sup>+</sup> ions. At pH ≥ 4, uranium(VI) mainly occurs in the pseudocolloidal form due to sorption on hydroxides of iron, aluminum, or other impurity elements. The decrease in the fraction of uranium colloids at pH ≥ 7 is due to the formation of stable, negatively charged uranyl carbonate complexes in the solution.</p>\",\"PeriodicalId\":747,\"journal\":{\"name\":\"Radiochemistry\",\"volume\":\"66 2\",\"pages\":\"268 - 273\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2024-05-16\",\"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/S1066362224020164\",\"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/S1066362224020164","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Speciation of Uranium in Trace Concentrations in Aqueous Solutions of Complex Chemical Composition
Speciation of uranium in trace concentrations in water of complex chemical composition was studied using ultrafiltration and sorption methods in a wide range of solution acidity. As shown by the experiments and computations, uranium in trace concentrations in aqueous solutions identical to wastewater from the facilities occurs at pH 1–3 in the truly dissolved state in the form of UO22+ and UO2OH+ ions. At pH ≥ 4, uranium(VI) mainly occurs in the pseudocolloidal form due to sorption on hydroxides of iron, aluminum, or other impurity elements. The decrease in the fraction of uranium colloids at pH ≥ 7 is due to the formation of stable, negatively charged uranyl carbonate complexes in the solution.
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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