Surface SO4?- enhanced synergistic oxidation-solidification of high organic soil-like material from landfills
文献类型：期刊论文
| 作者 | Li, Shuang1,2,3; Cao, Shiyu2,3; Zhang, Wei1,2,3; Li, Jiangshan2,3 |
| 刊名 | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
 |
| 出版日期 | 2025-06-01 |
| 卷号 | 13期号:3页码:10 |
| 关键词 | Landfill Soil-like material (SLM) Synergistic oxidation-solidification Organic matter Surface radicals |
| ISSN号 | 2213-2929 |
| DOI | 10.1016/j.jece.2025.116737 |
| 英文摘要 | The soil foundation construction utilization of high organic soil-like material (SLM) from landfills is difficult to meet both low organic matter content and engineering performance requirements. In this study, a synergistic oxidation-solidification system was constructed by adding Ca(OH)2-activated persulfate (Ca(OH)2-PS) and commonly used sulfoaluminate cement (SAC). When separately applied into SLM, the SAC only slightly decreased the organic matter through neutralization and precipitation, and the traditional Ca(OH)2-PS only degraded the lignins/CRAM through solution SO4 center dot- and center dot OH radicals. Surprisingly, SAC significantly increased the surface-OH of SLM, which could chemically adsorb SO4 center dot- released by Ca(OH)2-PS. This surface SO4 center dot- exhibited better oxidizing ability than solution radicals and could degrade both lignins/CRAM and proteins/ aliphatic molecules. Meanwhile, moderate Ca(OH)2-PS promoted needle-like ettringite formation by releasing SO42-, thus improving the strength of the solidified SLM. Thanks to the synergistic oxidation-solidification, 15 % SAC, 0.14 % Ca(OH)2 and 1 % persulfate into SLM decreased organic matter from 10.9 % to 4.8 % and enhanced soil strength to 3.2 MPa, both of which meet the soil foundation construction acceptance standards (GB 50202-2018). This study provides a viable pathway for the resourceful utilization of high organic SLM and contributes to the advancement of landfill mining and reclamation efforts. |
| 资助项目 | Hubei Province Tech-nological Innovation Plan Project[2024BCA006] ; National Natural Science Foundation of China[42177163] ; National Natural Science Foundation of China[52400195] ; Postdoctor Project of Hubei Province[2024HBA097] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001481495600001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35972]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Cao, Shiyu; Li, Jiangshan |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, HK PolyU Joint Lab Solid Waste Sci, IRSM, Wuhan 430071, Peoples R China 3.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 | Li, Shuang,Cao, Shiyu,Zhang, Wei,et al. Surface SO4?- enhanced synergistic oxidation-solidification of high organic soil-like material from landfills[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,2025,13(3):10. |
| APA | Li, Shuang,Cao, Shiyu,Zhang, Wei,&Li, Jiangshan.(2025).Surface SO4?- enhanced synergistic oxidation-solidification of high organic soil-like material from landfills.JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,13(3),10. |
| MLA | Li, Shuang,et al."Surface SO4?- enhanced synergistic oxidation-solidification of high organic soil-like material from landfills".JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 13.3(2025):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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