▎ 摘　　要

NOVELTY - Ferromanganese amino graphene oxide magnetic composite material comprises a three-dimensional structure mainly composed of manganese ferrite nanoparticles, silicon materials coated on the surface of the manganese ferrite particles, and graphene oxide sheets grafted on the silicon materials after being modified by amino groups, where the silicon material comprises ethyl orthosilicate, methyl orthosilicate, gamma -aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, or N-methyl-3-aminopropyltrimethoxysilane. USE - The ferromanganese amino graphene oxide magnetic composite material is used for removing heavy metals in water, where the heavy metals include at least one of lead ions or cadmium ions (claimed). ADVANTAGE - The composite material has a specific recognition mechanism for lead ions and cadmium ions, and has important application value and practical significance for the separation and analysis of heavy metal ions in environmental samples. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the ferromanganese amino graphene oxide magnetic composite material, comprising coating a silicon material on the surface of manganese ferrite nanoparticles to obtain manganese ferrite-silicon dioxide nanoparticles, modifying the manganese ferrite-silicon dioxide nanoparticles by surface amino groups to prepare manganese ferrite-silicon dioxide-amino group-based nanoparticles, and attaching the manganese ferrite-silicon dioxide-amino group-based nano-particles to the graphite oxide sheet layer through a chemical bond to obtain the product.