▎ 摘　　要

NOVELTY - Preparation of activated alumina-organic graphene film composite absorbent comprises taking activated alumina matrix, adding polyvinylalcohol solution, sonicating at 40 degrees C for 2-4 hours, and drying at 20-50 degrees C; and treating in 0.1-10 vol.% silane coupling agent containing ethanol, agitating, reacting at 20-50 degrees C for 1-10 hours, taking out, drying, adding organic solution containing 0.1-10 wt.% graphene, and reacting at 50-100 degrees C for 1-10 hours. USE - Method for preparing activated alumina-organic graphene film composite absorbent used for adsorbing heavy metal ions and organic contaminants in wastewater (claimed). ADVANTAGE - The absorbent can be applied to toxic, low concentration, and difficult to degrade wastewater and has adsorption rate of more than 97%. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for treatment of wastewater comprising taking wastewater containing high toxic organic waste or wastewater trace heavy metal ions having minimum concentration of 10-200 mu g/mL, adding 1-15 g graphene film/activated alumina sorbent/L waste water, and processing for 1-21 hours.