▎ 摘　　要

NOVELTY - Producing gadolinium-graphene oxide complex, comprises (a) preparing graphene oxide, (b) preparing a mixture by mixing gadolinium (III) nitrate hexahydrate with graphene oxide, (c) reacting the mixture in a basic environment to form a gadolinium-graphene oxide complex, and (d) washing and drying the gadolinium-graphene oxide complex. USE - The complex is useful in absorbent for removing arsenic compounds (claimed). ADVANTAGE - The complex removes arsenic and possesses paramagnetic, and collects compound easily. The absorbent removes pollutants in water. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) gadolinium-graphene oxide complex prepared by the above method; and (2) absorbent comprising gadolinium-graphene oxide complex.