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  • Liu, JunShenzhen University (author)

Synthesis of geopolymer using municipal solid waste incineration fly ash and steel slag: Hydration properties and immobilization of heavy metals

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2023

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:e271baa9-3785-471d-964e-fa2e08cc6fba
  • https://doi.org/10.1016/j.jenvman.2023.118053DOI
  • https://research.chalmers.se/publication/535796URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • 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.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Xie, GuangmingShenzhen University (author)
  • Wang, ZhengdongShenzhen University (author)
  • Li, ZhenlinShenzhen University (author)
  • Fan, XuShenzhen University (author)
  • Jin, HesongShenzhen University (author)
  • Zhang, WeizhuoShenzhen University (author)
  • Xing, FengShenzhen University (author)
  • Tang, Luping,1956Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)vbmtl (author)
  • Shenzhen UniversityChalmers tekniska högskola (creator_code:org_t)

Related titles

  • In:Journal of Environmental Management3410301-47971095-8630

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