▎ 摘　　要

NOVELTY - Strongly adsorbed graphene composite material comprises magnesium-aluminum hydrotalcite and graphene oxide. The self-assembled multi-level structure is formed between magnesium-aluminum hydrotalcite and graphite oxide. USE - Strongly adsorbed graphene composite material used in sewage treatment (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing strongly adsorbed graphene composite material, which involves: (A) mixing graphene oxide dispersion and magnesium-aluminum hydrotalcite; (B) adding to the coagulation liquid to form graphene oxide-based composite hydrogel; (C) aging obtained graphene oxide-based composite hydrogel, adding with reducing agent and reacting at 60-200 degrees C for 4-10 hours, and washing; and (D) drying to obtain strongly adsorbed graphene-based composite material.