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通过酸盐和本托尼特合物增强酸盐和本托尼特合物运输的pH依赖的协同增强

Yanhui Wang¹, Qi Tan², Yujie Hong²

¹State Key Laboratory of Chemistry for NBC Hazards Protection, Frontiers Science Center for Rare Isotopes, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; Key Laboratory of Special Functional Materials and Structural Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China.

Journal of hazardous materials

|December 23, 2025

概括

酸盐和托尼特合物显著影响放射性废物仓库中的 (U ((VI)) 流动性,pH值是一个关键因素. 班托尼特合物通过充当载体和稳定剂来增强U ((VI) 运输,特别是在更高的pH水平下.

科学领域:

环境科学环境科学
地质化学地质化学
核废物管理核废物管理

背景情况:

在地质放射性废物仓库中, (U ((VI)) 流动性是一个关键问题.
石合物和酸盐存在于存储环境中,可以影响U(VI) 的行为.
了解U,,,和酸盐之间的复杂相互作用对于存储库的安全至关重要.

研究的目的:

在模拟的储存环境中,研究与本托尼特合物和酸盐的共同运输.
为了确定pH值对U(VI),本托尼特合物和酸盐的相互作用和流动性的影响.
评估矿物表面在U(VI) 固定化中的作用和土石合物对U(VI) 运输的影响.

主要方法:

使用石英砂和花岩矿物包装的柱体进行柱体实验.
在不同的pH条件下,检查与本托尼特合物和酸盐的U(VI) 共运输.
应用一个独立的两个位点模型 (ITSM) 来分析吸附-脱吸动力学和合物保留.

主要成果:

的运输高度依赖于pH值.
酸盐通过在pH值3.0以上形成基酸盐合物来增强U(VI) 的流动性,但在pH值2.5.时没有影响.
班托尼特合物显著增加了U(VI) 的流动性,作为载体和稳定剂,在不同的矿物中具有不同的有效性 (石英>K-feldspar>illite>biotite).

结论:

pH 是一个关键参数,控制了地质储存库中的放射性核素的移动性.
石合物在促进U(VI) 运输方面发挥了协同作用,影响了存储库安全评估.
独立的两站式模型有效模拟观察到的共同运输行为,有助于运输建模.

关键词:

班托尼特的合物班托尼特的合物携带运输携带运输石英花岩是一种花岩.酸盐是一种酸盐.是一种.

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