▎ 摘　　要

NOVELTY - A foamed copper ferrite/graphene oxide is prepared by using foamed iron as substrate, immersing foam iron substrate in hydrochloric acid solution to remove surface of oxide film, dissolving graphene oxide in distilled water, dispersing to obtain graphene oxide dispersion, adding ferric nitrate and copper nitrate to distilled water, adding urea, adding processed foam iron substrate and graphene oxide dispersion to reaction vessel, reacting, removing surface of growth of ferrite and ferric oxide foam iron, washing and drying. USE - Foamed copper ferrite/graphene oxide used in adsorption and removal of arsenic in water (claimed). ADVANTAGE - The foamed copper ferrite/graphene oxide has strong arsenic adsorption capacity in water, and high recycling performance. DETAILED DESCRIPTION - A foamed copper ferrite/graphene oxide is prepared by using foamed iron as substrate, and carrying out surface growth of copper ferrite and graphene oxide, immersing foam iron substrate in hydrochloric acid solution to remove surface of oxide film, dissolving graphene oxide in distilled water, ultrasonically dispersing to obtain graphene oxide dispersion, adding ferric nitrate and copper nitrate to distilled water according to copper and iron molar ratio of 1:1-1:5, stirring until completely dissolved, adding urea, stirring for 10-60 minutes, adding processed foam iron substrate and graphene oxide dispersion to reaction vessel, heat preserving for 3-12 hours, reacting at 50-200 degrees C, removing the surface of the growth of ferrite and ferric oxide foam iron, washing with distilled water, and drying in an oven at 50-100 degrees C. The molar ratio of ferric nitrate and cupric nitrate to urea is 26:1-5:1. The mass ratio of graphene oxide and nitrate is 1:(100-3000). INDEPENDENT CLAIMS are included for the following: (1) preparation of foamed copper ferrite/graphene oxide, which involves immersing foam iron substrate in hydrochloric acid solution to remove surface of oxide film, dissolving graphene oxide in distilled water, ultrasonically dispersing to obtain graphene oxide dispersion, adding ferric nitrate and copper nitrate to distilled water according to copper and iron molar ratio of 1:1-1:5, stirring until completely dissolved, adding urea, stirring for 10-60 minutes, adding processed foam iron substrate and graphene oxide dispersion to reaction vessel, heat preserving for 3-12 hours, reacting at 50-200 degrees C, removing the surface of the growth of ferrite and ferric oxide foam iron, washing with distilled water, and drying in an oven at 50-100 degrees C. The molar ratio of ferric nitrate and cupric nitrate to urea is 26:1-5:1. The mass ratio of graphene oxide and nitrate is 1:(100-3000); and (2) usage of foamed copper ferrite/graphene oxide in adsorption and removal of arsenic in water, which involves adjusting the pH of arsenic-containing wastewater to 2-12, adding into foamed copper ferrite/graphene oxide, carrying out oscillation adsorption at 10-60 degrees C and 100-400 rpm, squeezing the foamed copper ferrite/graphene oxide with a magnet, filtering waste water to obtain treated water.