Manipulating layer charge to regulate the hydration and swelling of montmorillonite
文献类型：期刊论文
| 作者 | Ma, Tiantian4; Hao, Fengfu3; Yu, Haiwen2,4; Wei, Changfu4; Zhang, Guoping1 |
| 刊名 | GEOTECHNIQUE
 |
| 出版日期 | 2025-01-23 |
| 页码 | 58 |
| 关键词 | adsorption artificial/synthetic soil charge-reduced montmorillonite expansive soils li-fixation moisture-related properties |
| ISSN号 | 0016-8505 |
| DOI | 10.1680/jgeot.24.00997 |
| 英文摘要 | An experimental investigation was conducted to uncover how artificial manipulation of layer charge of montmorillonite regulates its swelling and hydration behavior and hence find its novel applications such as CO2 capture. Charge-reduced montmorillonites (CRMs) were prepared via the Li-fixation technique, followed by characterizing their diverse physical, chemical, hydration, and swelling properties, including Atterberg limits, cation exchange capacity, water adsorption isotherms, basal spacing variability, and the fraction of expandable layers. Results show that the number of expandable 2:1 layers in a CRM quasicrystal decreases with layer charge, primarily because of the migration of the interlayer Li+ cations into the empty octahedra and hence the reduction in the population of hydrated exchangeable interlayer cations. Also, Li-fixation leads to the conversion of the original expandable 2:1 smectite layers to the nonexpendable, hydrophobic pyrophyllite-like layers. Upon Li-fixation, the water retention and adsorption capability of the CRMs decrease gradually with layer charge, while the maximum water content and area of the wetting-drying hysteresis loop of adsorption/desorption isotherms exhibit the opposite. Furthermore, a facile method for determining the proportion of expandable layers is developed for the Li-fixed CRMs. The viable application of CRMs for enhanced CO2 capture or adsorption is envisioned in terms of the reduced layer charges and creaction of local hydrophobic microzones on the siloxane surfaces. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[42472356] ; National Natural Science Foundation of China (NSFC)[51939011] ; Science and Technology Program of CNOOC Research Institute[2023OT-KK03] ; Research Fund Key Laboratory of Geomechanics and Geotechnical Engineering Safety, Chinese Academy of Sciences[JBGS2405] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001405046500001 |
| 出版者 | EMERALD GROUP PUBLISHING LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37415]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Guoping |
| 作者单位 | 1.Univ Massachusetts Amherst, Dept Civil & Environm Engn, Amherst, MA 01003 USA 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Guilin Univ Technol, Coll Civil & Architectural Engn, Guilin 541004, Guangxi, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Tiantian,Hao, Fengfu,Yu, Haiwen,et al. Manipulating layer charge to regulate the hydration and swelling of montmorillonite[J]. GEOTECHNIQUE,2025:58. |
| APA | Ma, Tiantian,Hao, Fengfu,Yu, Haiwen,Wei, Changfu,&Zhang, Guoping.(2025).Manipulating layer charge to regulate the hydration and swelling of montmorillonite.GEOTECHNIQUE,58. |
| MLA | Ma, Tiantian,et al."Manipulating layer charge to regulate the hydration and swelling of montmorillonite".GEOTECHNIQUE (2025):58. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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