▎ 摘　　要

NOVELTY - Graphene oxide sulfomonomer magnetic adsorbent comprises graphite alkenyl oxide loaded with a magnetic ferrite nanoparticle and surface containing a large amount of sulfonic acid group. USE - The sulfonated graphene oxide magnetic adsorbent is useful for removing heavy metal ion and organic matter from wastewater and thus used in smelting, electric factory, chemical plant and electroplate factory, where the heavy metal is copper and cadmium (claimed). ADVANTAGE - The product has good adsorption effect, large specific surface area, and is cost-effective and easy to separate and recycle. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method of preparing sulfonated graphene oxide magnetic adsorbent, which involves adding graphite powder into 50 mL of concentrated sulfuric acid and reacting for 2-8 hours at 50-100 degrees C, then cooling to 20-40 degrees C for 8-12 hours and drying to obtain the pre-oxidized graphite, adding the pre-oxidized graphite to 300 mL of concentrated sulfuric acid, then adding sodium nitrate and potassium permanganate, reacting for 2-6 hours at 30-40 degrees C, then adding 800-1200 mL of pure water, continuously reacting for 1-6 hours, ultrasonically dispersing for 4 hours to obtain graphene oxide water solution, mixing deoxygenated ultra pure water and ferrous ion mixed solution, rapidly stirring for 4 minutes at 70-95 degrees C, then adding 300-600 mL of ammonia water, continuously stirring for 0.5-2 hours, cooling, separating, precipitating and washing to obtain magnetic graphene oxide suspension, adding concentrated hydrochloric acid and reacting for 10-30 minutes to obtain the diazonium salt, then separating and precipitating to obtain the adsorbent.