The present investigation aims to compare the leaching characteristics of uranium isotopes in acidic and alkaline dissolving solutions with different concentrations. The leachate of uranium is prepared from sedimentary rocks collected from SW Sinai, Egypt. The uranium isotope activity concentration was measured using gamma counting recorded by the HPGe detector. Additionally, activity ratios as well as the leaching efficiency of different uranium isotopes were calculated. Results have shown that sulfuric acid at 40 % has been able to outpace other concentrations in dissolving a higher ratio of uranium isotopes with a 1 : 4 solid to acid ratio and 2 days as soaking time.²³⁴Th contributes to the ²³⁴U activity causes a significant efficiency difference as opposed to ²³⁵U & ²³⁸U in prepared bearing solutions. The recorded pH values in a bearing solution of different samples at investigated leaching conditions were oscillated from −1.2 to 4 due to lead impurities diffusion to bearing solutions.

中文翻译：

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使用酸性介质溶液进行铀矿浓缩的新方面

本研究旨在比较不同浓度的酸性和碱性溶解溶液中铀同位素的浸出特性。铀的渗滤液是从埃及西奈西南部收集的沉积岩中制备的。使用 HPGe 探测器记录的伽马计数测量铀同位素活度浓度。此外，还计算了不同铀同位素的活度比和浸出效率。结果表明，40% 的硫酸在溶解更高比例的铀同位素方面已经能够超过其他浓度，固酸比为 1:4，浸泡时间为 2 天。²³⁴ Th 有助于²³⁴ U 活动导致显着的效率差异，而不是²³⁵U & ²³⁸ U 在准备好的轴承解决方案中。由于铅杂质扩散到轴承溶液，在研究的浸出条件下，不同样品的轴承溶液中记录的 pH 值从 -1.2 波动到 4。