Comprehensive investigation into the effects of oxygen concentration on pyrite oxidation processes and key ion migration patterns in black rock layers
文献类型：期刊论文
| 作者 | Liu, Zihang3,4; Dai, Zhangjun4; Yu, Fei4; Tong, Kaiwen3,4; Guo, Jianhua2,4; Huang, Kang1,4; Qin, Shanglin4; Chen, Shanxiong4 |
| 刊名 | CASE STUDIES IN CONSTRUCTION MATERIALS
 |
| 出版日期 | 2025-07-01 |
| 卷号 | 22页码:19 |
| 关键词 | Black rock layers Pyrite oxidation High-speed rail SO42 concentration Subgrade |
| ISSN号 | 2214-5095 |
| DOI | 10.1016/j.cscm.2025.e04226 |
| 英文摘要 | This study systematically analyzed the impact of oxygen concentration on the oxidation of black rock layer samples and the migration patterns of key ions, focusing on samples from a high-speed railway subgrade in Fenghuang County, Hunan Province. The experimental results identified three stages of sample oxidation, showing that oxygen concentration significantly influences the reaction rate during the initial stage. Under high oxygen concentration, the generation rate of sulfate ions (SO42- ) rapidly peaks in the early phase. Although this initial phase only accounts for 8 % of the entire oxidation process, it constitutes 77 % of the overall reaction. After this peak, the rate gradually decreases and stabilizes. While the oxidation rate is slower under medium and low oxygen concentrations, the overall trend remains similar to that observed under high oxygen conditions. The study also revealed that fill material samples are particularly sensitive to oxygen concentration during the early stages of oxidation, whereas the oxidation process in parent rock samples is significantly delayed due to their long-term undisturbed state and lower pyrite content. Additionally, water plays a crucial role as a reaction medium in the oxidation process, with its infiltration rate directly affecting the initial oxidation rate. These findings provide important insights for preventing geological hazards in high-speed rail projects under similar geological conditions. |
| 资助项目 | National Natural Science Foundation of China[42172308] ; Youth Innovation Promotion Association CAS[2022331] ; Key Research and Development Program of Hubei Province[2022BAA036] |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001399288100001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37283]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Dai, Zhangjun |
| 作者单位 | 1.Minist Water Resources, Changjiang River Sci Res Inst, Key Lab Geotech Mech & Engn, Wuhan 430010, Peoples R China 2.Changjiang Inst Survey Planning Design & Res Corp, Wuhan 430010, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Zihang,Dai, Zhangjun,Yu, Fei,et al. Comprehensive investigation into the effects of oxygen concentration on pyrite oxidation processes and key ion migration patterns in black rock layers[J]. CASE STUDIES IN CONSTRUCTION MATERIALS,2025,22:19. |
| APA | Liu, Zihang.,Dai, Zhangjun.,Yu, Fei.,Tong, Kaiwen.,Guo, Jianhua.,...&Chen, Shanxiong.(2025).Comprehensive investigation into the effects of oxygen concentration on pyrite oxidation processes and key ion migration patterns in black rock layers.CASE STUDIES IN CONSTRUCTION MATERIALS,22,19. |
| MLA | Liu, Zihang,et al."Comprehensive investigation into the effects of oxygen concentration on pyrite oxidation processes and key ion migration patterns in black rock layers".CASE STUDIES IN CONSTRUCTION MATERIALS 22(2025):19. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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