▎ 摘　　要

NOVELTY - A nanometer adsorption material is a composite material of iron oxide, graphene and magnesium-aluminum hydroxide. The molar ratio of iron, magnesium, aluminum and carbon is (0.18-0.27):(0.33-0.82):(0.17-0.44):(0.17-0.83). USE - Nanometer adsorption material (claimed). ADVANTAGE - The nanometer adsorption material having excellent adsorption capacity and reproducibility is produced by simple method. The adsorption removal rate of low-concentration acid dye wastewater is made more than 99%, and deep treatment effect is achieved. The adsorptive property of adsorption material is effectively increased without affecting the environment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nano-meter absorption material, which involves adding iron chloride (FeCl3 and FeCl2) to graphene oxide solution under nitrogen atmosphere, adjusting pH to 9-11, adding magnesium chloride hexahydrate, aluminum chloride hexahydrate and hexamethylene tetramine, and hydrothermally reacting.