▎ 摘　　要

NOVELTY - Preparation of aminothiourea-modified magnetic graphene oxide adsorbent involves mixing (S1) graphene oxide, ferrous ion, ferric ion, and water to obtain a mixed solution, adding (S2) aqueous ammonia to the mixed solution, reacting at 70-90 degrees C for 50-70 minutes, centrifuging, washing, drying to obtain a magnetic ferroferric oxide and graphene oxide composite which is a magnetic graphene oxide solid, reacting (S3) the magnetic graphene oxide solid with aminothiourea using water as a reaction medium at 45-55 degrees C for 12-16 hours, centrifuging, washing, and drying. USE - Preparation of aminothiourea-modified magnetic graphene oxide adsorbent used for treating wastewater containing heavy metal ions e.g. divalent mercury ion (all claimed). ADVANTAGE - The method produces aminothiourea-modified magnetic graphene oxide adsorbent having excellent adsorption and desorption performance, regeneration characteristics, and mercury-ion selectivity, and large specific surface area.