Role of Fe species in geopolymer synthesized from alkali-thermal pretreated Fe-rich Bayer red mud

Yong Hu; Sha Liang; Jiakuan Yang; Ye Chen; Nan Ye; Yan Ke; Shuangyi Tao; Keke Xiao; Jingping Hu; Houjie Hou; Wei Fan; Suiyi Zhu; Yuanshang Zhang; Bo Xiao

doi:10.1016/j.conbuildmat.2018.12.122

Role of Fe species in geopolymer synthesized from alkali-thermal pretreated Fe-rich Bayer red mud

Yong Hu, Sha Liang, Jiakuan Yang^*, Ye Chen, Nan Ye, Yan Ke, Shuangyi Tao, Keke Xiao, Jingping Hu, Houjie Hou, Wei Fan, Suiyi Zhu, Yuanshang Zhang, Bo Xiao

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

116 Scopus citations

Abstract

A geopolymer material was synthesized from alkali-thermal pretreated Fe-rich Bayer red mud (RM) and fly ash. Dissolution efficiencies of Al₂O₃ and SiO₂ in the RM in alkaline solutions were improved by pretreatment. The transformation of mineral phases in the RM during synthesis of geopolymer was investigated by the alkaline leaching test, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The role of Fe species in geopolymerization was investigated by Mössbauer spectra. The results showed that binding energies of Al-O and Si-O increased in geopolymerization; the coordinated Fe³⁺ replaced Al³⁺ in the aluminosilicate structure of geopolymer.

Original language	English
Pages (from-to)	398-407
Number of pages	10
Journal	Construction and Building Materials
Volume	200
DOIs	https://doi.org/10.1016/j.conbuildmat.2018.12.122
State	Published - 10 Mar 2019
Externally published	Yes

Keywords

Alkali-thermal pretreatment
Bayer red mud
Fe species
Geopolymer

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10.1016/j.conbuildmat.2018.12.122

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@article{b98ea1a2893a4b398cce88682eb4f887,

title = "Role of Fe species in geopolymer synthesized from alkali-thermal pretreated Fe-rich Bayer red mud",

abstract = "A geopolymer material was synthesized from alkali-thermal pretreated Fe-rich Bayer red mud (RM) and fly ash. Dissolution efficiencies of Al2O3 and SiO2 in the RM in alkaline solutions were improved by pretreatment. The transformation of mineral phases in the RM during synthesis of geopolymer was investigated by the alkaline leaching test, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The role of Fe species in geopolymerization was investigated by M{\"o}ssbauer spectra. The results showed that binding energies of Al-O and Si-O increased in geopolymerization; the coordinated Fe3+ replaced Al3+ in the aluminosilicate structure of geopolymer.",

keywords = "Alkali-thermal pretreatment, Bayer red mud, Fe species, Geopolymer",

author = "Yong Hu and Sha Liang and Jiakuan Yang and Ye Chen and Nan Ye and Yan Ke and Shuangyi Tao and Keke Xiao and Jingping Hu and Houjie Hou and Wei Fan and Suiyi Zhu and Yuanshang Zhang and Bo Xiao",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2019",

month = mar,

day = "10",

doi = "10.1016/j.conbuildmat.2018.12.122",

language = "英语",

volume = "200",

pages = "398--407",

journal = "Construction and Building Materials",

issn = "0950-0618",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Role of Fe species in geopolymer synthesized from alkali-thermal pretreated Fe-rich Bayer red mud

AU - Hu, Yong

AU - Liang, Sha

AU - Yang, Jiakuan

AU - Chen, Ye

AU - Ye, Nan

AU - Ke, Yan

AU - Tao, Shuangyi

AU - Xiao, Keke

AU - Hu, Jingping

AU - Hou, Houjie

AU - Fan, Wei

AU - Zhu, Suiyi

AU - Zhang, Yuanshang

AU - Xiao, Bo

PY - 2019/3/10

Y1 - 2019/3/10

N2 - A geopolymer material was synthesized from alkali-thermal pretreated Fe-rich Bayer red mud (RM) and fly ash. Dissolution efficiencies of Al2O3 and SiO2 in the RM in alkaline solutions were improved by pretreatment. The transformation of mineral phases in the RM during synthesis of geopolymer was investigated by the alkaline leaching test, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The role of Fe species in geopolymerization was investigated by Mössbauer spectra. The results showed that binding energies of Al-O and Si-O increased in geopolymerization; the coordinated Fe3+ replaced Al3+ in the aluminosilicate structure of geopolymer.

AB - A geopolymer material was synthesized from alkali-thermal pretreated Fe-rich Bayer red mud (RM) and fly ash. Dissolution efficiencies of Al2O3 and SiO2 in the RM in alkaline solutions were improved by pretreatment. The transformation of mineral phases in the RM during synthesis of geopolymer was investigated by the alkaline leaching test, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The role of Fe species in geopolymerization was investigated by Mössbauer spectra. The results showed that binding energies of Al-O and Si-O increased in geopolymerization; the coordinated Fe3+ replaced Al3+ in the aluminosilicate structure of geopolymer.

KW - Alkali-thermal pretreatment

KW - Bayer red mud

KW - Fe species

KW - Geopolymer

UR - http://www.scopus.com/inward/record.url?scp=85059056297&partnerID=8YFLogxK

U2 - 10.1016/j.conbuildmat.2018.12.122

DO - 10.1016/j.conbuildmat.2018.12.122

M3 - 文章

AN - SCOPUS:85059056297

SN - 0950-0618

VL - 200

SP - 398

EP - 407

JO - Construction and Building Materials

JF - Construction and Building Materials

ER -

Role of Fe species in geopolymer synthesized from alkali-thermal pretreated Fe-rich Bayer red mud

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Keywords

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