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Elemental Mercury Removal from Flue Gas by Metal/Metal Oxide Decorated Graphene Oxide Composites Open Access


Other title
Graphene Oxide
Elemental mercury
Flue gas
Type of item
Degree grantor
University of Alberta
Author or creator
Liu, Yuxi
Supervisor and department
Zeng, Hongbo (Chemical & Materials Engineering)
Liu, Qingxia (Chemical & Materials Engineering)
Examining committee member and department
Liu, Qingxia (Chemical & Materials Engineering)
Gupta, Rajender (Chemical & Materials Engineering)
Li, Zukui (Chemical & Materials Engineering)
Zeng, Hongbo (Chemical & Materials Engineering)
Department of Chemical and Materials Engineering
Chemical Engineering
Date accepted
Graduation date
Master of Science
Degree level
The toxic elemental mercury (Hg0) released from coal-fired flue gases is a huge threat to the environment and health of human beings. In this work, silver nanoparticles (NPs), nano ferrite, manganese dioxide, zinc oxide and copper oxide were successfully deposited on graphene oxide (GO) and applied as novel adsorbents for Hg0 removal. GO, magnetic ferrite nanoparticle-GO (MGO), Ag nanoparticle–GO (GO-Ag), MGO-Ag, GO-MnO2, GO-ZnO and GO-CuO were successfully synthesized and characterized. All the composite materials were tested for the mercury breakthrough by using a Cold Vapour Atomic Fluorescence Spectrophotometer at various temperatures. The presence of Ag NPs on GO greatly enhances the Hg0 removal capability of GO-Ag and MGO-Ag as compared to that of pure GO, which is mainly attributed to the amalgamation of Hg0 on Ag NPs. MGO-Ag shows the best Hg0 removal performance and thermal tolerance among all the adsorbents developed, with Hg0 removal efficiency of ~100% from 50 °C to 200 °C and even ~40% at 250 °C. The MGO-Ag composite can be fully regenerated for reuse through a thermal treatment process. The results indicate that MGO-Ag and GO-MnO2 can be effective candidates and have great potential applications in Hg0 removal from practical flue gas.
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