▎ 摘　　要

NOVELTY - Using tea saponin-reduced graphene oxide composition material comprises adding tea saponin-reduced graphene oxide composites in heavy metal waste water, oscillating at constant temperature in water bath for 1-2 hours at 20-30 degrees C with speed of 170-190 rotations/minute, where tea saponin-reduced graphene composites is a layered porous nanostructure with smooth surface formed by adsorption of tea saponin on the surface of reduced graphene oxide and combined with graphene in a chemical bond. USE - The tea saponin-reduced graphene oxide composition material is useful for treating heavy metal waste water (claimed). ADVANTAGE - The method has good treatment effect, absorption process has no secondary pollution and is easy to separate solid-liquid. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing tea saponin reduced graphene oxide composition material, comprising adding sodium borohydride and tea saponin into graphene oxide dispersion, heating, stirring to generate precipitated reactant, subjecting generated reaction liquid of the precipitant post-treatment.