▎ 摘　　要

NOVELTY - The apparatus (10) comprises a pretreatment unit (100) for injecting a magnetic adsorbent for removing the substance to be removed into the mixed solution including the substance to be removed and adsorbing the substance to be removed on the surface of the magnetic adsorbent, and a magnetic adsorbent separator (200) for applying magnetic force to a magnetic adsorbent to which the substance to be removed is adsorbed at a predetermined time interval to separate the magnetic adsorbent to which the substance to be removed is adsorbed. A backwashing unit (300) supplies a cleaning liquid to the magnetic adsorbent separation unit for a portion of the time, when the magnetic force is not applied. The magnetic graphene oxide, graphene oxide and magnetite is a composite, and the material to be removed is a material comprising uranium. USE - Magnetic separation apparatus for purifying uranium-contaminated groundwater using magnetic graphene oxide and high gradient magnetic separation. ADVANTAGE - The reverse osmosis, ion exchange resin, and flocculation/sedimentation are applied to uranium contaminated water, and the construction and maintenance cost is low, and is easy to operate, and the by-product treatment such as sludge is not required. The usage amount of adsorbents is very small. The magnetic graphene oxide is efficiently separated and collected in the water system. The treated water is discharged faster than the adsorption process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a magnetic separation method using magnetic graphene oxide. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic sectional view of the magnetic separation apparatus. Magnetic separation apparatus (10) Pretreatment unit (100) Reactor (110) Magnetic adsorbent separator (200) Backwashing unit (300)