Study on Microstructure,Surface Properties and Se Adsorption Properties of Mn Doped Hematite
WANG Chensi
NIU Pengju
WEI Shiyong
Abstract：In order to study the microstructure,surface properties of Mn doped hematite(Hem),and its adsorption characteristics of Se(IV),Hem and Mn doped Hem in different proportions(H-Mnx,x=0.1,0.2,0.3)were prepared.The samples were investigated by X-ray diffraction(XRD),transmission electron microscop(TEM),particle size distribution,Zeta potential analysis,and N2 isothermal adsorption-desorption experiment.The results showed that the crystal formation of Hem could be inhibited by Mn-doping.With increasing the Mn-doping ratio,the crystallinity and particle size of H-Mnx decreased gradually.Langmuir model(R2=0.9499～0.9986)and quasi-second-order kinetic model(R2=0.9924～0.9990)were used to describe the isothermal adsorption and kinetic adsorption processes of Se(IV)by Hem and H-Mnx respectively.With the increase of Mn-doping ratio,the adsorption capacity of H-Mnx for Se(IV)increased and the adsorption equilibrium time prolongated.The study helped to understand the interaction between iron oxides and Se in soil,and provided scientific basis for the morphological regulation and efficient utilization of Se in soil.
Keywords：hematiteMn dopediron oxidesurface propertiesadsorptionSe
Publication Date：2024-09-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 324-329,342 )