▎ 摘　　要

Hydroxypropyl-beta-cyclodextrin graphene (HP-beta-CD-GO) supramolecules were prepared from Hydroxypropyl-beta-cyclodextrin and graphene oxide (GO), and loaded with nanoparticles of Fe3O4 by the hydrothermal method to obtain a magnetic nano-adsorbent HP-beta-CD-GO/Fe3O4. The structure and magnetic properties were characterized by FTIR, TGA, SEM and VSM. The results exhibited that the mass ratio of HP-beta-CD, GO and Fe3O4 nanoparticles was 35%, 25% and 40% respectively. SEM analysis revealed that HP-beta-CD was spherically loaded on the surface of flaky graphene, and the size of the magnetically modified nano-composite was about 140-170 nm. VSM test disclosed that HP-beta-CD-GO/Fe3O4 has superparamagnetic properties, the saturation magnetization of Fe3O4 was 62 emu/g, and after HP-beta-CD-GO modification the saturation magnetization decreases to 27 emu/g. The magnetic nanocomposite's adsorption property for Pb2+ and Cu(2+ )was examined by atomic absorption spectroscopy. The effect of pH value, adsorption temperature, adsorption time, and other factors on the adsorption properties were considered and the optimum adsorption conditions were determined. The results showed that the maximum adsorption of Pb2+ and Cu2+ by HP-beta-CD-GO/Fe3O4 was 50.39 mg/g and 17.91 mg/ g, respectively. After five times of repetitive adsorption, the adsorption rates of Pb2+ and Cu2+ were above 85% respectively. The adsorption of Pb2+ and Cu2+ accords with the Freundlich adsorption isotherm model.