Facile Synthesis of Fe3O4@PDA@MOF-199 Nanocomposite for Enrichment of Pb

With hydrothermal method synthesized Fe3O4@PDA@MOF-199 magnetic nano-materials and the materials were characterized through scanning electron microscopy, energy spectrum diagram, fourier infrared and vibrating sample magnetometer. Metal organic framework materials has a large surface area and a good adsorption for heavy metal ions, and the magnetic nanomaterial was separated easily via a magnet from a solution. The optimal condition: material consumption of 5 mg, shock time for 1 h, pH = 5 and under the condition saturated adsorption amount of Fe3O4@PDA@MOF-199 magnetic nanomaterials to Pb2+ was 539 mg g−1. And using 0.1 mol L−1 EDTA solution as eluent to desorb the saturated Fe3O4@PDA@MOF-199 magnetic nanomaterials, the elution rate can reach 89.44%. In this paper, Fe3O4@PDA@MOF-199 magnetic nanomaterials were used to absord Pb2+ in actual sample.