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Synthesis of geopol...
Synthesis of geopolymer using municipal solid waste incineration fly ash and steel slag: Hydration properties and immobilization of heavy metals
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- Liu, Jun (author)
- Shenzhen University
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- Xie, Guangming (author)
- Shenzhen University
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- Wang, Zhengdong (author)
- Shenzhen University
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- Li, Zhenlin (author)
- Shenzhen University
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- Fan, Xu (author)
- Shenzhen University
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- Jin, Hesong (author)
- Shenzhen University
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- Zhang, Weizhuo (author)
- Shenzhen University
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- Xing, Feng (author)
- Shenzhen University
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- Tang, Luping, 1956 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Journal of Environmental Management. - 0301-4797 .- 1095-8630. ; 341
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Abstract
Subject headings
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- In this study, a novel method for the disposal of municipal solid waste incineration fly ash (MSWIFA) was proposed. By applying geopolymer technology, steel slag (SS) and MSWIFA were used together as precursors to synthesize a cementitious material with sufficient strength that is useable in construction. The effects of the dosages of SS and alkaline activator on the properties of the geopolymer were investigated. Compressive testing was used to characterize the mechanical properties of the geopolymer. X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used for microscopic analysis. Leaching tests were performed to assess the immobilization effect of the geopolymer on heavy metals. The results showed that the compressive strength of the geopolymer reached 23.03 MPa at 56 d with 20% SS and 11% Na2O admixture. Highly polymerized hydration products, such as C-(A)-S-H gels and N-A-S-H gels, contributed to the compact microstructure, which provided mechanical strength and limited the migration and leaching of heavy metals in the geopolymer matrix. In terms of the results, this work is significant for the development of MSWIFA management.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Annan naturresursteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Other Environmental Engineering (hsv//eng)
Keyword
- Solidification/stabilization
- MSWI fly ash-based geopolymer material
- Leaching risk
- Hazardous waste
- Mechanical strength
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Liu, Jun
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Xie, Guangming
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Wang, Zhengdong
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Li, Zhenlin
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Fan, Xu
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Jin, Hesong
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show more...
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Zhang, Weizhuo
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Xing, Feng
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Tang, Luping, 19 ...
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show less...
- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Environmental En ...
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and Other Environmen ...
- Articles in the publication
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Journal of Envir ...
- By the university
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Chalmers University of Technology