Optimization of the Leaching Kinetics for Uranium Recovery from a Boltwoodite Ore as Emerging Solution to Nigerian Power Sector

IF 2.5 3区材料科学 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Journal of Sustainable Metallurgy Pub Date : 2024-05-08 DOI:10.1007/s40831-024-00834-1

Mustapha A. Raji, Alafara A. Baba, Abhilash, Ajeet Gangwar, Jude O. Majasan

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Abstract

The continuous rise of the population cum standard of living has resulted in Nigerians looking for a profound solution to the fast-growing demand for electrical energy with sustainability concerns including greenhouse gas emissions limitation. Thus, the investigation of uranium leaching kinetics and thermodynamics has become one of the most crucial topics in leach technology, where many distinct results have been obtained. In this study, the influence of sulfuric acid concentration, reaction temperature, solid-to-liquid ratio, and leaching time were all investigated. At established experimental conditions (2.5 mol/L H₂SO₄, 75 °C, 75 µm), the uranium ore dissolution efficiency recorded was 89.1% within 120 min. The kinetic and thermodynamic tests of the leaching process coupled with the reaction mechanism between sulfuric acid and uranium were discussed. Hence, the results confirm that the dissolution mechanism of uranium was diffusion controlled, exothermic, and spontaneous.

Graphical Abstract

Abstract Image

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优化浸出动力学，从勃尔特伍德矿石中回收铀，作为尼日利亚电力部门的新兴解决方案

随着人口和生活水平的不断提高，尼日利亚人正在寻找一种深层次的解决方案，以满足快速增长的电力能源需求，同时兼顾可持续发展问题，包括限制温室气体排放。因此，铀沥滤动力学和热力学研究已成为沥滤技术中最重要的课题之一，并取得了许多独特的成果。本研究考察了硫酸浓度、反应温度、固液比和浸出时间的影响。在既定的实验条件下（2.5 mol/L H2SO4、75 °C、75 µm），铀矿石在 120 分钟内的溶解效率为 89.1%。对浸出过程的动力学和热力学测试以及硫酸与铀的反应机理进行了讨论。因此，结果证实铀的溶解机制是扩散控制、放热和自发的。

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来源期刊

Journal of Sustainable Metallurgy Materials Science-Metals and Alloys

CiteScore

4.00

自引率

12.50%

发文量

151

期刊介绍： Journal of Sustainable Metallurgy is dedicated to presenting metallurgical processes and related research aimed at improving the sustainability of metal-producing industries, with a particular emphasis on materials recovery, reuse, and recycling. Its editorial scope encompasses new techniques, as well as optimization of existing processes, including utilization, treatment, and management of metallurgically generated residues. Articles on non-technical barriers and drivers that can affect sustainability will also be considered.