γ irradiation effects on natural GMZ bentonite

IF 1.2 4区地球科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Physics and Chemistry of Minerals Pub Date : 2025-05-24 DOI:10.1007/s00269-025-01322-y

Wei Liu, Dong Liang, Zhongtian Yang, Chao Gao, Jingli Xie

引用次数: 0

Abstract

To investigate the impact of γ irradiation on bentonite, the natural bentonite from GaoMiaoZi (GMZ), located in Inner Mongolia, China, and foreseen as an engineering barrier in geological disposal facilities, was selected as the subject of this study. The sample underwent exposure to a Co-60 source followed by comprehensive analysis utilizing various techniques, including mass spectrometer, swelling pressure testing system, X-ray diffraction, simultaneous thermal analysis, infrared spectrometer, and Mössbauer spectroscopy. The findings indicated that γ irradiation detrimentally altered the microstructure and reduced the structure trivalent iron of GMZ bentonite, leading to a decrease in swelling pressure, with a noticeable cumulative dose effect. Additionally, a negative exponential correlation was observed between the maximum swelling pressure and absorbed dose. The effect of γ irradiation significantly influenced the physical and chemical properties of GMZ bentonite.

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γ辐照对天然GMZ膨润土的影响

为探讨γ辐照对膨润土的影响，以内蒙古高庙子天然膨润土为研究对象，研究了该天然膨润土在地质处置设施中作为工程屏障的可能性。样品暴露于Co-60源，然后使用各种技术进行综合分析，包括质谱仪，膨胀压力测试系统，x射线衍射，同步热分析，红外光谱仪和Mössbauer光谱。结果表明，γ辐照使GMZ膨润土的微观结构发生了不利的改变，三价铁结构减少，导致膨润土膨胀压力降低，且具有明显的累积剂量效应。最大溶胀压与吸收剂量呈负指数相关。γ辐照对GMZ膨润土的理化性质有显著影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physics and Chemistry of Minerals 地学-材料科学：综合

CiteScore

2.90

自引率

14.30%

发文量

审稿时长

3 months

期刊介绍： Physics and Chemistry of Minerals is an international journal devoted to publishing articles and short communications of physical or chemical studies on minerals or solids related to minerals. The aim of the journal is to support competent interdisciplinary work in mineralogy and physics or chemistry. Particular emphasis is placed on applications of modern techniques or new theories and models to interpret atomic structures and physical or chemical properties of minerals. Some subjects of interest are: -Relationships between atomic structure and crystalline state (structures of various states, crystal energies, crystal growth, thermodynamic studies, phase transformations, solid solution, exsolution phenomena, etc.) -General solid state spectroscopy (ultraviolet, visible, infrared, Raman, ESCA, luminescence, X-ray, electron paramagnetic resonance, nuclear magnetic resonance, gamma ray resonance, etc.) -Experimental and theoretical analysis of chemical bonding in minerals (application of crystal field, molecular orbital, band theories, etc.) -Physical properties (magnetic, mechanical, electric, optical, thermodynamic, etc.) -Relations between thermal expansion, compressibility, elastic constants, and fundamental properties of atomic structure, particularly as applied to geophysical problems -Electron microscopy in support of physical and chemical studies -Computational methods in the study of the structure and properties of minerals -Mineral surfaces (experimental methods, structure and properties)