▎ 摘　　要

NOVELTY - Preparing graphene material involves ultrasonically dispersing the graphene oxide in the deionized water, then adding polyamide amine, heating, and stirring the reaction, after finishing the reaction filtering the reaction product, washing, and drying to obtain the modified graphene oxide, adding the modified graphene oxide and nano calcium carbonate into the sodium alginate solution, ultrasonically dispersing uniformly, standing and defoaming, dropping into the calcium chloride solution, stirring to obtain the composite gel, soaking the composite ball in gel acid solution, then using deionized water to wash to neutral, freezing and drying to obtain the porous ball gel, adding the porous ball gel to the sodium hydroxide solution, then adding carbon disulfide, stirring, and reacting at room temperature after the reaction is finished, filtering the reaction product, washing, freezing and drying to obtain the graphene material. USE - Method for preparing graphene material, for use in heavy metal wastewater. ADVANTAGE - The method has increased the specific surface gel of the ball, has improved the adsorption performance of the ball gel by reacting the amino with carbon disulfide in the porous ball, has improved the graphene material adsorption capacity of heavy metal ion, has a good reproducibility adsorption-analysis cycle 10 times.