▎ 摘　　要

NOVELTY - Bifunctional magnetic graphene oxide adsorbent material, is prepared by chemically grafting graphene oxide with phosphorus oxychloride, reacting with water, and chemically grafting amino compounds and supporting magnetic particles through a one-step hydrothermal method. USE - The adsorbent material is useful in heavy metal wastewater treatment (claimed). ADVANTAGE - The adsorbent material improves the hydrophilicity of the material and the adsorption effect of heavy metals in water, increases the binding sites of amino compounds, introduces amino active groups with heavy metal adsorption performance, improves the adsorption performance of heavy metals, is recycled after the wastewater is treated, avoids secondary pollution of water body, and is environmentally-friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the adsorbent material, involving (i) add phosphorus oxychloride and triethylamine to tetrahydrofuran in sequence under the protection of inert gas, uniformly stirring, adding graphene oxide after ultrasonic dispersion in tetrahydrofuran, reacting at room temperature for 4-6 hours, leaving still, filtering with suction, washing the solid to neutrality and freeze-drying to obtain phosphoric acid-based graphene oxide, and (ii) adding phosphoric acid-based graphene oxide to ethylene glycol, stirring for 2-3 hours, adding ferric chloride and divalent metal chloride, ultrasonically stirring for 30-45 minutes, adding anhydrous sodium acetate and amino compound, stirring for 1-2 hours, reacting in a hydrothermal reactor at 180-200 degrees C for 8-10 hours, washing and freeze-drying to obtain bifunctional magnetic graphene oxide.