High-efficient stabilization and solidification of municipal solid waste incineration fly ash by synergy of alkali treatment and supersulfated cement
文献类型：期刊论文
| 作者 | Cao, Wenxiang3; Lv, Xuesen3; Ban, Jiaxing3; Lu, Jian-Xin3; Liu, Ze2; Chen, Zhen1; Poon, Chi Sun3 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2024-08-15 |
| 卷号 | 355页码:10 |
| 关键词 | Incineration fly ash Supersulfated cement Alkali treatment Heavy metals Stabilization and solidification |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2024.124261 |
| 英文摘要 | Municipal solid waste incineration fly ash (IFA) designated as hazardous waste poses risks to environment and human health. This study introduces a novel approach for the stabilization and solidification (S/S) of IFA: a combined approach involving alkali treatment and immobilization in low-carbon supersulfated cement (SSC). The impact of varying temperatures of alkali solution on the chemical and mineralogical compositions, as well as the pozzolanic reactivity of IFA, and the removal efficiency of heavy metals and metallic aluminum (Al) were examined. The physical characteristics, hydration kinetics and effectiveness of SSC in immobilizing IFA were also analyzed. Results showed that alkali treatment at 25 degrees C effectively eliminated heavy metals like manganese (Mn), barium (Ba), nickel (Ni), and chromium (Cr) to safe levels and totally removed the metallic Al, while enhancing the pozzolanic reactivity of IFA. By incorporating the alkali-treated IFA and filtrate, the density, compressive strength and hydration reaction of SSC were improved, resulting in higher hydration degree, finer pore structure, and denser microstructure compared to untreated IFA. The rich presence of calcium-aluminosilicate-hydrate (C(A)-S-H) and ettringite (AFt) in SSC facilitated the efficient stabilization and solidification of heavy metals, leading to a significant decrease in their leaching potential. The use of SSC for treating Ca(OH)2- and 25 degrees Ctreated IFA could achieve high strength and high-efficient immobilization. |
| 资助项目 | General Research Fund of the Hong Kong Research Grants Council Research Centre for Resources Engineering towards Carbon Neutrality (BBEK)[B-Q80K] ; Start-up Fund under the Strategic Hiring Scheme[BDS6] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001247550700001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41707]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Lu, Jian-Xin |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China 3.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cao, Wenxiang,Lv, Xuesen,Ban, Jiaxing,et al. High-efficient stabilization and solidification of municipal solid waste incineration fly ash by synergy of alkali treatment and supersulfated cement[J]. ENVIRONMENTAL POLLUTION,2024,355:10. |
| APA | Cao, Wenxiang.,Lv, Xuesen.,Ban, Jiaxing.,Lu, Jian-Xin.,Liu, Ze.,...&Poon, Chi Sun.(2024).High-efficient stabilization and solidification of municipal solid waste incineration fly ash by synergy of alkali treatment and supersulfated cement.ENVIRONMENTAL POLLUTION,355,10. |
| MLA | Cao, Wenxiang,et al."High-efficient stabilization and solidification of municipal solid waste incineration fly ash by synergy of alkali treatment and supersulfated cement".ENVIRONMENTAL POLLUTION 355(2024):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。