The influence of α-Al2O3 addition on microstructure, mechanical and formaldehyde adsorption properties of fly ash-based geopolymer products

被引：86

作者：

Huang, Yi ^{[1
]}

Han, Minfang ^{[1
]}

机构：

[1] China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2011年 / 193卷

关键词：

Fly ash; Geopolymer; Si/Al ratio; Al2O3; Formaldehyde adsorption;

D O I：

10.1016/j.jhazmat.2011.07.029

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Fly ash-based geopolymer with alpha-Al2O3 addition were synthesized and used to remove formaldehyde from indoor air. The microstructure, mechanical and formaldehyde adsorption properties of the geopolymer products obtained were investigated. The results showed that alpha-Al2O3 addition with appropriate amount (such as 5 wt%) increased the geopolymerization extent, resulting in the increase of surface area and compressive strength. In addition, the improvement of structural ordering level for geopolymer sample with 5 wt% alpha-Al2O3 addition was found through FUR analysis. By contrast, excessive addition (such as 10 wt%) had the opposite effect. The test of formaldehyde adsorption capacity confirmed that fly ash-based geopolymer product exhibited much better property of adsorbing indoor formaldehyde physically and chemically than fly ash itself. The surface area was an important but not unique factor influencing the adsorption capacity of geopolymers. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：90 / 94

页数：5

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