Incorporation of nanoscale zero-valent iron particles in monodisperse mesoporous silica nanospheres: Characterization, reactivity, transport in porous media
作者： Haojie Lu , Chunyu Wen , Song Gao , Yang Dong , Mengyue Zhang
DOI: 10.1016/J.COLSURFA.2018.05.038
关键词:
摘要: Abstract In this study, nanoscale zerovalent iron (nZVI) was incorporated inside the channels of monodisperse mesoporous silica nanospheres (MSN). The techniques TEM, XRD, FTIR, N2 adsorption-desorption and XPS were conducted to characterize composition structure composite materials. Results revealed that nZVI well dispersed in MSN, synthesized Fe/Si materials (nZVI@MSN) remained with size 100 nm which optimal range for transport through porous media. loading Fe (wt %) nZVI@MSN 4.3% BET surface area 743.49 m2/g. Batch experiment results removal efficiency nitrobenzene (NB) by 42.9% higher than bare nZVI. Lower initial solution pH could favour NB. Most common ions including Na+, K+, Cl−, NO3− SO42- presented no obvious effect on NB removal. While, Ca2+, Mg2+ HCO3− showed promoted inhibitory degradation increased ion concentration. After seven cycles reduction, 86%, indicating its high stability durability. Transport experiments performed better mobility aquifer media
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