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dc.contributor.author
Niu, He
dc.contributor.author
Adrianto, Lugas Raka
dc.contributor.author
Gomez Escobar, Alexandra
dc.contributor.author
Zhukov, Vladimir
dc.contributor.author
Perumal, Priyadharshini
dc.contributor.author
Kauppi, Janne
dc.contributor.author
Kinnunen, Paivo
dc.contributor.author
Illikainen, Mirja
dc.date.accessioned
2022-04-14T12:54:15Z
dc.date.available
2021-12-08T03:48:39Z
dc.date.available
2022-04-14T12:54:15Z
dc.date.issued
2021-12
dc.identifier.issn
2199-3823
dc.identifier.issn
2199-3831
dc.identifier.other
10.1007/s40831-021-00466-9
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/519418
dc.identifier.doi
10.3929/ethz-b-000519418
dc.description.abstract
Sulfidic mining waste rock is a side stream from the mining industry with a potential environmental burden. Alkali activation is a promising method for transforming mining waste into construction materials. However, the low reactivity of minerals can be a sizeable challenge in alkali activation. In the present study, the reactivity of waste rock was enhanced by mechanochemical treatment with a LiCl-containing grinding aid. X-ray diffraction (XRD) and diffuse reflectance infrared Fourier transform (DRIFT) analysis were utilized to display the structural alteration of individual minerals. A schematic implication of the grinding mechanism of mica was provided according to the results of transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The alkaline solubility displayed the enhanced chemical reactivity of the waste rock, in which Si and Al solubility increased by roughly 10 times and 40 times, respectively. The amorphization of aluminosilicate is achieved through chemical assisted mechanochemical activation. Sulfidic waste rock, as the sole precursor in alkali activation, achieved a 28-day compressive strength exceeding 10 MPa under ambient curing conditions. The simulation of the upscaled grinding process was conducted via the HSC Chemistry® software with a life-cycle assessment. The results showed that mining waste rock can be a promising candidate for geopolymer production with a lower carbon footprint, compared to traditional Portland cement.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Mechanochemical activation
en_US
dc.subject
Sulfidic mining waste rock
en_US
dc.subject
Geopolymer
en_US
dc.subject
Valorization
en_US
dc.subject
Life-cycle assessment
en_US
dc.subject
HSC Chemistry®
en_US
dc.title
Potential of Mechanochemically Activated Sulfidic Mining Waste Rock for Alkali Activation
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-12-01
ethz.journal.title
Journal of Sustainable Metallurgy
ethz.journal.volume
7
en_US
ethz.journal.issue
4
en_US
ethz.journal.abbreviated
J. Sustain. Metall.
ethz.pages.start
1575
en_US
ethz.pages.end
1588
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
European Training Network for the remediation and reprocessing of sulfidic mining waste sites
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
New York, NY
en_US
ethz.publication.status
published
en_US
ethz.grant.agreementno
812580
ethz.grant.fundername
EC
ethz.grant.funderDoi
10.13039/501100000780
ethz.grant.program
H2020
ethz.date.deposited
2021-12-08T03:48:53Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2022-04-14T12:54:22Z
ethz.rosetta.lastUpdated
2023-02-07T00:49:08Z
ethz.rosetta.versionExported
true
ethz.COinS
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