▎ 摘　　要

NOVELTY - Magnetic composite material comprises polymer functionalized graphene coated outside nanoparticles. The nanoparticles are polymer modified ferric oxide nanoparticles. The polymer in the polymer-functionalized graphene and the polymer-modified iron ferric oxide nanoparticles is gelatin, starch, hyaluronic acid, polyvinyl alcohol, and/or polyacrylic acid. USE - Magnetic composite material is useful for treating vanadium-containing waste water (claimed). ADVANTAGE - The polymer functionalized graphene has large specific surface area, which is beneficial to improve the adsorption capacity; using polymer solution as protective liquid to prepare the polymer modified ferroferric oxide nano ion, uniformly dispersing in the deionized water; and it is easy to combine with the polymer functionalized graphene, forming core-shell structure, so that ferroferric oxide nano-ion is protected; It is easy to characteristics, and it can separate the adsorption material quickly and efficiently by magnetism. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing magnetic composite materials for vanadium-containing wastewater treatment, comprising (i) dissolving 1-3 pts. wt. graphene oxide in 70-90 pts. wt. distilled water, ultrasonicating, continuously adding 5-10 pts. wt. polymer, dissolving polymer, heat preserving, stirring and reducing to obtain a mixed solution, filtering with suction, and drying to obtain polymer-functionalized graphene; (ii) adding 2-5 pts. wt. iron-containing salt to 25-35 pts. wt. deionized water and dissolving to obtain iron ion solution; (iii) dissolving 3-10 pts. wt. polymer in 80-90 pts. wt. deionized water, stirring, dissolving and adding iron ion solution dropwise, stirring uniformly, adding 1-5 pts. wt. alkaline liquid dropwise for reaction to obtain ferric oxide nanoparticle dispersion, setting magnetic absorption, washing with water and alcohol for multiple times, and drying to obtain polymer-modified iron ferric oxide nanoparticles; and (iv) dissolving 2-5 pts. wt. polymer-modified iron ferric oxide nanoparticles in deionized water, adding 3-5 pts. wt. polymer-functionalized graphene, and dropping 0.5-2 pts. wt. cross-linking agent, stirring for reaction, collecting by magnetic absorption, washing with water and alcohol for multiple times, and drying. DESCRIPTION OF DRAWING(S) - The drawing shows a synthetic mechanism diagram of the magnetic composite material for treating vanadium-containing waste water. (Drawing includes non-English language text).