title: Elemental mercury oxidation and adsorption on magnesite powder modified by Mn at low temperature.
abstract: 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, H2-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.
authors.affiliation: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring & Pollution Control, School of Environmental Sciences and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, PR China.
authors.forename: Yalin
authors.initials: Y
authors.lastname: Xu
authors.affiliation: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China. Electronic address: zq304@mail.njust.edu.cn.
authors.forename: Qin
authors.initials: Q
authors.lastname: Zhong
authors.affiliation: Jiangsu HeYiChang Environmental Protection Engineering & Technology Co., Ltd., PR China.
authors.forename: Xinya
authors.initials: X
authors.lastname: Liu
mesh_terms: D000327:Adsorption; D003080:Cold Temperature; D008274:Magnesium / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*; D008956:Models, Chemical; D010084:Oxidation-Reduction
chemical_list: C005479:magnesium carbonate; D008345:Manganese; D008628:Mercury; D008274:Magnesium
keywords: Adsorbent; Amorphous MnO(2); Elemental mercury; Magnesite powder