Isotopic ratios of 234U/238U in in-situ uranium leach liquors and their application to evaluate residual uranium in the orebody

IF 4.8 2区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Hydrometallurgy Pub Date : 2025-02-26 DOI:10.1016/j.hydromet.2025.106463

Vladimir S. Semenishchev, Svetlana M. Titova

{"title":"Isotopic ratios of 234U/238U in in-situ uranium leach liquors and their application to evaluate residual uranium in the orebody","authors":"Vladimir S. Semenishchev, Svetlana M. Titova","doi":"10.1016/j.hydromet.2025.106463","DOIUrl":null,"url":null,"abstract":"<div><div>The paper summarizes results from long-term observations of the (234U/238U) activity ratios in in-situ uranium leach liquors produced in a uranium mining plant. Measurements of the activity ratios of 234U/238U were performed from March 2018 to November 2022 in liquors from new and old leaching wells. The results have shown a significant dominance of 234U (234U/238U activity ratios up to 2.27) in the pregnant leach solution (PLS) collected from the well during the first 3–6 months. The real 234U/238U activity ratios differed significantly from those values reported in the literature for in-vitro lab experiments that can be explained by the scaling effect. A method for evaluation of minimum residual amount of uranium in the ore body, which is potentially available for leaching was suggested based on the results of long-term monitoring of the 234U/238U activity ratios.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"234 ","pages":"Article 106463"},"PeriodicalIF":4.8000,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Hydrometallurgy","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304386X25000283","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

Abstract

The paper summarizes results from long-term observations of the (²³⁴U/²³⁸U) activity ratios in in-situ uranium leach liquors produced in a uranium mining plant. Measurements of the activity ratios of ²³⁴U/²³⁸U were performed from March 2018 to November 2022 in liquors from new and old leaching wells. The results have shown a significant dominance of ²³⁴U (²³⁴U/²³⁸U activity ratios up to 2.27) in the pregnant leach solution (PLS) collected from the well during the first 3–6 months. The real ²³⁴U/²³⁸U activity ratios differed significantly from those values reported in the literature for in-vitro lab experiments that can be explained by the scaling effect. A method for evaluation of minimum residual amount of uranium in the ore body, which is potentially available for leaching was suggested based on the results of long-term monitoring of the ²³⁴U/²³⁸U activity ratios.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Hydrometallurgy 工程技术-冶金工程

CiteScore

9.50

自引率

6.40%

发文量

144

审稿时长

3.4 months

期刊介绍： Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures; separation of solids from leach liquors; removal of impurities and recovery of metal values by precipitation, ion exchange, solvent extraction, gaseous reduction, cementation, electro-winning and electro-refining; pre-treatment of ores by roasting or chemical treatments such as halogenation or reduction; recycling of reagents and treatment of effluents.