▎ 摘　　要

NOVELTY - Preparation of graphene biocarbon, involves adding straw powder to a mixed solution of iron solution and zinc solution, reacting in a water bath, drying to obtain straw and metal composite material, pyrolyzing the straw and metal composite material, pickling, and freeze-drying. USE - Preparation of graphene biocarbon used for treating wastewater containing organophosphorus pesticides (all claimed). ADVANTAGE - The method enables preparation of graphene biocarbon, which has specific surface area and pore volume much higher than existing biocarbon, contains graphene structure, regular pores, and high adsorption capacity for organophosphorus pesticides, and effectively prevents organophosphorus pesticide pollution. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: application of graphene biocarbon for treating wastewater containing organophosphorus pesticide; and regeneration after saturated adsorption of the graphene biocarbon, which involves washing the absorbed and saturated graphene biocarbon using hydrochloric acid.