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Surface imprinting technique is a new strategy for selective removal or recycle of precious metal ions. The adsorbent which is prepared has affinity and specific recognition, it is a present research hot spot. The paper based on silica gel as the carrier,3-aminopropyltriethoxy silane(APS/KH550) as the coupling agent, salicylicaldehyde Schiff base(Sal), pyruvic acid Schiff base(PA), bromoacetic acid Schiff base(MBAA) as the three types of functional monomers and epichlorohydrin(ECH) as crosslinking agent, Pb2+as a template ion, using ion imprinting technology surface synthesized a new type of ion imprinting adsorption material IIP-Sal/SiO2, IIP-PA/SiO2, HP-MBAA/SiO2. The synthesis conditions of AP-SiO2and HP-SiO2are investigated, and the material adsorption properties of heavy metal ions and the mechanism is discussed. This thesis consists of the following three parts:1. Explored the synthesis conditions and the best technology of alkylating silica gel. The more optimal condition of AP-SiO2by hydrothermal synthesis was:reaction temperature of120℃, the reaction time of72h, anhydrous ethanol:activated silica gel=4:1(mL:g), KH550:activated silica gel=1:1(mL:g).2. Synthesized three kinds of new Schiff base ligands. and used the ligands as a functional monomer, synthesized three new ion imprinted materials IIP-Sal/SiO2, IIP-PA/SiO2, IIP-MBAA/SiO2.3. Studied the influence factors of the adsorption process of IIP-SiO2and NIIP-SiO2by static adsorption method. Results showed that:room temperature,0.1g adsorbent, Pb2+solution of10mL concentration of100mg/L and pH value between5.0～6.0, could achieve a better adsorption effect, when saturated adsorption in15～30min, the adsorption quantity was between1.0-1.4.4. Characterized the structure of IIP-SiO2and NIIP-SiO2. Studied the adsorption and recognition performance, thermodynamics, kinetics and recycling performance of IIP-SiO2and NIIP-SiO2.
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