Detoxification and immobilization of chromite ore processing residue in spinel-based glass-ceramic

Liao, Chang-Zhong1,2; Tang, Yuanyuan3; Lee, Po-Heng5; Liu, Chengshuai1,4; Shih, Kaimin2; Li, Fangbai1

2017-01-05

10.1016/j.jhazmat.2016.09.035

JOURNAL OF HAZARDOUS MATERIALS   影响因子和分区

0304-3894

1873-3336

A promising strategy for the detoxification and immobilization of chromite ore processing residue (COPR) in a spinel-based glass-ceramic matrix is reported in this study. In the search for a more chemically durable matrix for COPR, the most critical crystalline phase for Cr immobilization was found to be a spinel solid solution with a chemical composition of MgCr1.32Fe0.19Al0.49O4. Using Rietveld quantitative X-ray diffraction analysis, we identified this final product is with the phases of spinel (3.5 wt.%), diopside (5.2 wt.%), and some amorphous contents (91.2 wt.%). The partitioning ratio of Cr reveals that about 77% of the Cr was incorporated into the more chemically durable spinel phase. The results of Cr K-edge X-ray absorption near-edge spectroscopy show that no Cr(VI) was observed after conversion of COPR into a glass-ceramic, which indicates successful detoxification of Cr(VI) into Cr(III) in the COPR-incorporated glass-ceramic. The leaching performances of Cr2O3 and COPR-incorporated glass-ceramic were compared with a prolonged acid-leaching test, and the results demonstrate the superiority of the COPR-incorporated glass-ceramic matrix in the immobilization of Cr. The overall results suggest that the use of affordable additives has potential in more reliably immobilizing COPR with a spinel-based glass-ceramic for safer disposal of this hazardous waste. (C) 2016 Elsevier B.V. All rights reserved.

Detoxification Immobilization Chromite ore processing residue (COPR) Glass-ceramic Rietveld quantitative XRD

SCI ; EI

英语

其他

Collaborative Research Fund of the Research Grants Council of Hong Kong[C7044-14G]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000388777300048

ELSEVIER SCIENCE BV

20163902852226

Additives ; Ceramic materials ; Chromite deposits ; Detoxification ; Glass ; Glass ceramics ; Leaching ; Radioactive waste vitrification ; Waste disposal ; X ray absorption ; X ray powder diffraction

Industrial Wastes Treatment and Disposal:452.4 ; Heavy Metal Mines:504.3 ; Electromagnetic Waves:711 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Ceramics:812.1 ; Glass:812.3

ENGINEERING

Web of Science

1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China
2.Univ Hong Kong, Dept Civil Engn, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China
3.South Univ Sci & Technol China, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550009, Peoples R China
5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China

Liao, Chang-Zhong,Tang, Yuanyuan,Lee, Po-Heng,et al. Detoxification and immobilization of chromite ore processing residue in spinel-based glass-ceramic[J]. JOURNAL OF HAZARDOUS MATERIALS,2017,321:449-455.

Liao, Chang-Zhong,Tang, Yuanyuan,Lee, Po-Heng,Liu, Chengshuai,Shih, Kaimin,&Li, Fangbai.(2017).Detoxification and immobilization of chromite ore processing residue in spinel-based glass-ceramic.JOURNAL OF HAZARDOUS MATERIALS,321,449-455.

Liao, Chang-Zhong,et al."Detoxification and immobilization of chromite ore processing residue in spinel-based glass-ceramic".JOURNAL OF HAZARDOUS MATERIALS 321(2017):449-455.