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

文献类型： 外文期刊

作者： Liao, Chang-Zhong 1 ; Tang, Yuanyuan 3 ; Lee, Po-Heng 5 ; Liu, Chengshuai 1 ; Shih, Kaimin 2 ; Li, Fangbai 1 ;

作者机构： 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

关键词： Detoxification;Immobilization;Chromite ore processing residue (COPR);Glass-ceramic;Rietveld quantitative XRD

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

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收录情况： SCI

摘要： 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.

  • 相关文献

[1]Double-Barrier mechanism for chromium immobilization: A quantitative study of crystallization and leachability. Liao, Changzhong,Liu, Chengshuai,Li, Fangbai,Liao, Changzhong,Shih, Kaimin,Tang, Yuanyuan,Liu, Chengshuai.

[2]Secretory expression and characterization of a novel peroxiredoxin for zearalenone detoxification in Saccharomyces cerevisiae. Wu, Hui,Yu, Yuanshan. 2013

[3]A Novel Mesophilic Anaerobic Digestion System for Biogas Production and In Situ Methane Enrichment from Coconut Shell Pyroligneous. Cheng, Jing-Rong,Liu, Xue-Ming,Chen, Zhi-Yi,Zhang, You-Sheng,Zhang, Ye-Hui,Cheng, Jing-Rong.

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