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Study on the solidification/stabilization of Cu(II) and Cd(II)-contaminated soil by fly ash-red mud based geopolymer

文献类型：期刊论文

作者Hao, Haojie5; Liu, Xiaofeng1,4,5; Dong, Xiaoqiang5; Liu, Yufeng2; Li, Jiangshan4; Li, Jiashi5; Xu, Xin3; Chang, Shiqi5
刊名CONSTRUCTION AND BUILDING MATERIALS
出版日期2025-03-28
卷号469页码:17
关键词Red mud geopolymer Heavy metal contaminated soil Solidification/stabilization Microscopic mechanism Sustainable waste management Heavy metal chemical forms
ISSN号0950-0618
DOI10.1016/j.conbuildmat.2025.140515
英文摘要The preparation of geopolymer for solidification/stabilization of heavy metal contaminated soils using industrial solid waste was a sustainable method. In this study, a binary geopolymer curing agent was synthesized from red mud and fly ash for the treatment of copper- and cadmium- contaminated soils. The changes in the properties of the cured soil were investigated by analyzing compressive strength, permeability coefficient, pH value, toxicity leaching, and the chemical forms of heavy metals. These parameters were examined under varying amounts of curing agent and curing time. The solidification mechanism of contaminated soil was revealed by microscopic experiments such as X-ray diffraction (XRD), infrared spectroscopy (FTIR), scanning electron microscope with energy dispersive X-ray spectroscopy (SEM-EDS). The results showed that geopolymer could significantly improved the mechanical properties and environmental safety of contaminated soil. Compressive strengths of Cu and Cd contaminated soils after 28d of curing with 30 % geopolymer were 1.27 and 1.44 MPa, the permeability coefficients were 4.2 and 3.8-6cm/s, and toxic leaching amounts of Cu2+ and Cd2+ were 4.8 and 0.21 mg/L, and pH values were 10.9 and 10.6, respectively. Geopolymer gel structures not only filled the voids between soil particles but also physically encapsulated, chemically bonded, precipitated and ion-exchanged to achieve solidification/stabilization of contaminated soils. This research provided a new technology for the management of heavy metal contaminated soil and promoted the sustainable use of industrial solid waste.
资助项目National Natural Science Foundation of China[52378360] ; National Natural Science Foundation of China[51978438] ; National Natural Science Foundation of China[52408380] ; Projects of International Cooperation and Exchanges NSFC[52281340410] ; Natural Science Foundation for Young Scientists of Shanxi Province, China[202103021223122] ; School Foundation of Taiyuan University of Technology[2022QN044] ; Shanxi Scholarship Council of China[2023-060] ; Shanxi Key Laboratory of Civil Engineering Disaster Prevention and Control ; Special fund for Science and Technology Innovation Teams of Shanxi Province ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME022012]
WOS研究方向Construction & Building Technology ; Engineering ; Materials Science
语种英语
WOS记录号WOS:001432694400001
出版者ELSEVIER SCI LTD
源URL[http://119.78.100.198/handle/2S6PX9GI/36759]  
专题中科院武汉岩土力学所
通讯作者Liu, Xiaofeng
作者单位1.Taiyuan Univ Technol, 79 West Yingze St, Taiyuan 030024, Shanxi, Peoples R China
2.Zhongsheng Environm Technol Dev Co LTD, Xian 710000, Shaanxi, Peoples R China
3.Jilin Univ, Coll Construct Engn, Changchun 130021, Jilin, Peoples R China
4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
5.Taiyuan Univ Technol, Coll Civil Engn, 79 West Yingze St, Taiyuan 030024, Peoples R China
推荐引用方式
GB/T 7714		 Hao, Haojie,Liu, Xiaofeng,Dong, Xiaoqiang,et al. Study on the solidification/stabilization of Cu(II) and Cd(II)-contaminated soil by fly ash-red mud based geopolymer[J]. CONSTRUCTION AND BUILDING MATERIALS,2025,469:17.
APA Hao, Haojie.,Liu, Xiaofeng.,Dong, Xiaoqiang.,Liu, Yufeng.,Li, Jiangshan.,...&Chang, Shiqi.(2025).Study on the solidification/stabilization of Cu(II) and Cd(II)-contaminated soil by fly ash-red mud based geopolymer.CONSTRUCTION AND BUILDING MATERIALS,469,17.
MLA Hao, Haojie,et al."Study on the solidification/stabilization of Cu(II) and Cd(II)-contaminated soil by fly ash-red mud based geopolymer".CONSTRUCTION AND BUILDING MATERIALS 469(2025):17.

入库方式： OAI收割

来源：武汉岩土力学研究所

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