▎ 摘　　要

NOVELTY - Heavy metal ions are absorbed by preparing graphene adsorbent using acetylacetone reduction, adding graphene to aqueous solution containing lead(II) (Pb2+), cadmium(II) (Cd2+), and cobalt(II) (Co2+) heavy metal ions, adjusting pH, stirring, filtering to obtain filtrate, measuring Pb2+, Cd2+, and Co2+ heavy metal ion content in filtrate using inductively coupled plasma atomic emission spectroscopy (ICP-AES), and recalculating Pb2+, Cd2+, and Co2+ heavy metal ion concentration absorbed by graphene. USE - Absorption of heavy metal ions for sewage treatment. ADVANTAGE - Absorption of heavy metal ions has improved adsorption amount and simple operation. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart for the absorption of heavy metal ions. (Drawing includes non-English language text).