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

被引：136

作者：

Hu, Yong ^{[1
]}

Liang, Sha ^{[1
,2
]}

Yang, Jiakuan ^{[1
,2
,3
]}

Chen, Ye ^{[1
,2
]}

Ye, Nan ^{[4
]}

Ke, Yan ^{[1
,2
]}

Tao, Shuangyi ^{[1
,2
]}

Xiao, Keke ^{[1
,2
]}

Hu, Jingping ^{[1
,2
]}

Hou, Houjie ^{[1
,2
]}

Fan, Wei ^{[5
]}

Zhu, Suiyi ^{[5
]}

Zhang, Yuanshang ^{[6
]}

Xiao, Bo ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Wuhan 430074, Hubei, Peoples R China

[2] Hubei Prov Engn Lab Solid Waste Treatment Disposa, Wuhan 430074, Hubei, Peoples R China

[3] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China

[4] Jiangxi Acad Sci, Inst Sci Technol Strategy, Nanchang 330096, Jiangxi, Peoples R China

[5] Northeast Normal Univ, Jilin Engn Res Ctr Municipal Wastewater Treatment, Changchun 130117, Jilin, Peoples R China

[6] Zhejiang Tiandi Environm Protect Technol Co Ltd, Hangzhou 311121, Zhejiang, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 200卷

关键词：

Bayer red mud; Alkali-thermal pretreatment; Geopolymer; Fe species; FLY-ASH; IRON DISTRIBUTION; FE-57; MOSSBAUER; TEMPERATURE; ACTIVATION; CONVERSION; BAUXITE; ALUMINA; WASTE;

D O I：

10.1016/j.conbuildmat.2018.12.122

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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 Mossbauer 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. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：398 / 407

页数：10

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