Immobilization of chromite ore processing residue with alkali-activated blast furnace slag-based geopolymer

被引：134

作者：

Huang, Xiao ^{[1
]}

Huang, Tao ^{[1
]}

Li, Shan ^{[1
]}

Muhammad, Faheem ^{[1
]}

Xu, Guojing ^{[1
]}

Zhao, Ziqiang ^{[1
]}

Yu, Lin ^{[1
]}

Yan, Yujie ^{[1
]}

Li, Dongwei ^{[1
,2
]}

Jiao, Binquan ^{[1
,2
]}

机构：

[1] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Coll Resource & Environm Sci, Chongqing 400044, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Blast furnace slag; Alkali-activated; Geopolymer; Chromite ore processing residue; Immobilization; FERROUS SULFATE; CR(VI); REDUCTION; WASTE; COPR; HYDRATION; CHROMATE; CEMENT; HEAVE; WATER;

D O I：

10.1016/j.ceramint.2016.03.033

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Chromite ore processing residue (COPR) is an industrial waste produced in the chromic salts production process and contains a small portion of leached Cr(VI), which is highly toxic and is listed as a hazardous waste. The immobilization of COPR using a blast furnace slag-based geopolymer has been investigated in this study. The optimum parameters for preparing the blast furnace slag-based geopolymer using an orthogonal experiment were obtained. COPR was used to replace the amount of blast furnace slag for the preparation of the geopolymer. The COPR-bearing blast furnace slag-based geopolymer has potential application as a construction material and for geological disposal. The combined effect of physical fixation, adsorption and ion exchange in the geopolymeric and CSH (calcium silicate hydrate) gel is considered to be the main mechanism, and the reduction of S2- in the blast furnace slag played a significant role in the solidification of the COPR. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：9538 / 9549

页数：12

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