▎ 摘　　要

NOVELTY - Method for treating wastewater, involves (i) mixing arsenic-containing wastewater with hydrogen peroxide for oxidation in the reaction tank, (ii) adding trivalent iron salt, performing arsenic precipitation reaction, and performing solid-liquid separation to obtain first stage wastewater, and (iii) adding graphene material to the first stage wastewater, removing impurities, and performing solid-liquid separation to obtain second stage wastewater. USE - The method is useful for treating wastewater. ADVANTAGE - The method combines chemical method and adsorption method, selects an efficient adsorption material, has simple and convenient process, and excellent arsenic removal effect on wastewater with high arsenic concentration.