Characterization of pore water microdynamics and microstructure of clays: The effect of pore fluid chemistry and temperature
文献类型：期刊论文
| 作者 | Tian, H. H.1; Fan, Q.2; Zhu, Z. Y.2; Wei, C. F.1 |
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2024-10-05 |
| 卷号 | 698页码:10 |
| 关键词 | NMR relaxometry Temperature Pore fluid chemistry Soil-water interaction Water microdynamics |
| ISSN号 | 0927-7757 |
| DOI | 10.1016/j.colsurfa.2024.134571 |
| 英文摘要 | It is crucial to figure out the microdynamics of pore water and the microstructure of clays under various thermal and chemical environments when characterizing the physical properties of clays. In this study water microdynamics in clay was investigated via the nuclear magnetic resonance (NMR) technique. The NMR measurements were performed on three clays saturated with distilled water and three salt solutions from 25 to 75 degrees C. The saline and thermal effect on soil-water interaction, water microdynamics and microstructure of clays has been investigated through relaxation times by invoking the DDL theory and the ionic hydration mechanism. Number of jumps (tau(S)/tau(m)) for water molecule is 82 for soils A or C and 520 for soil B when saturated with distilled water, implying the larger surface molecular affinity of soil B. Salt solutions increase the values of tau(S)/tau(m) in the sequence of K+>Ca2+>Na+. Effective activation energy of pore water Delta E= 2.33 kcal/mol, 1.49 kcal/mol and 1.19 kcal/mol for soils A, B and C when saturated with distilled water are obtained. The effect of salt solution on Delta E depends on cation exchange capacity (CEC) and specific surface area (SSA), the larger the CEC and SSA, the smaller the saline effect. In addition, it is found that the pore size distribution of the compacted clay is bimodal, and inter-aggregate pores are greatly influenced by pore fluid chemistry, due to clay aggregation. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[42072312] ; National Natural Science Foundation of China (NSFC)[51939011] ; Science and Technology Program of CNOOC Research Institute[2023OT-KK03] |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:001261405300001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41836]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wei, C. F. |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 2.CNOOC Res Inst Co Ltd, State Key Lab Nat Gas Hydrates, Beijing 100028, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tian, H. H.,Fan, Q.,Zhu, Z. Y.,et al. Characterization of pore water microdynamics and microstructure of clays: The effect of pore fluid chemistry and temperature[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2024,698:10. |
| APA | Tian, H. H.,Fan, Q.,Zhu, Z. Y.,&Wei, C. F..(2024).Characterization of pore water microdynamics and microstructure of clays: The effect of pore fluid chemistry and temperature.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,698,10. |
| MLA | Tian, H. H.,et al."Characterization of pore water microdynamics and microstructure of clays: The effect of pore fluid chemistry and temperature".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 698(2024):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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