A Facile Synthesis of Ion Imprinted Mesoporous Silica Adsorbents by a Co-Condensation Pathway and Application in a Fixed-Bed Column Study for Lead Removal
作者： Yanmin Gao , Zhaoyong Hu , Yan Liu , Zhanchao Liu , Rui Chen
DOI: 10.1071/CH14461
关键词:
摘要: Highly selective lead ion imprinted mesoporous silica adsorbents (PbII-IMS) were prepared through a co-condensation pathway with 3-(γ-aminoethylamino)propyltrimethoxysilane (AAPTS) (PbII-IMS-NN) and 3-aminepropyltriethoxysilyl (APTES) (PbII-IMS-N) as monomers. The characterised by FT-IR spectroscopy, X-ray photoelectron power diffraction, transmission electron microscopy, scanning thermogravimetric analysis, nitrogen adsorption–desorption techniques. results showed that the synthesised presented highly ordered structure. In comparison PbII-IMS-N, PbII-IMS-NN demonstrated higher adsorption capacity in series of static dynamic experiments, was further applied to continuous fixed-bed column study under different conditions. It found breakthrough time increased an increase bed depth, but decreased flow rate initial PbII concentration, data more consistent Thomas model than Adams–Bohart model. Furthermore, greater recognition binding affinity towards target ions PbII-IMS-N.
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