Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 283, Issue -, Pages 252-259Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2014.09.034
Keywords
Elemental mercury; Adsorbent; Amorphous MnO2; Magnesite powder
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Funding
- Scientific Research Project of Environmental Protection Department of Jiangsu Province [201112]
- Project from Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control of Nanjing University of Information Science and Technology, Jiangsu Province Innovation Platform [KHK1208]
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Mn modified the commercial magnesite powder prepared by wet impregnation method has been shown to be effective for gas-phase elemental mercury (Hg-0) removal at low temperatures. The prepared samples are characterized in detail across multiform techniques: XRF, BET, SEM-EDX, XRD, H-2-TPR, and XPS, and all the results show that the amorphous MnO2 impregnated on magnesite powder improves the removal efficiency of Hg-0 Through further analysis by TG and in situ FTIR, the reasonable removal mechanism is also speculated. The results indicate that chemisorbed oxygen is an important reactant in the heterogeneous reaction, and gas-phase Hg-0 is adsorbed and then oxidized to solid MnHgO3 on the surface of the adsorbent. (C) 2014 Elsevier B.V. All rights reserved.
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