▎ 摘　　要

NOVELTY - Graphene modified bio-carbon composite material comprises graphene, sodium dodecylbenzene sulfonate and biochar comprises loading graphene on biochar through sodium dodecylbenzene sulfonate to form a mesh stent structure. USE - The graphene modified bio-carbon composite material is useful for processing lead ion in water body (claimed). ADVANTAGE - The material is suitable for large scale water body processing. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing graphene modified bio-carbon composite material, comprising (i) adding sodium dodecylbenzene sulfonate solution into graphene, sonicating to peel-off graphene into graphene sheets and to obtain graphene suspension, (ii) adding camphor wood sawdust into the graphene suspension solution, stirring and drying to obtain a mixture, and (iii) subjecting the mixture to pyrolysis; and (2) use of graphene modified bio-carbon composite material in processing lead ion in water body.