▎ 摘　　要

NOVELTY - The method involves providing a graphene-based membrane comprises a stacked arrangement of layers of a graphene-based material. The layers of the graphene-based material define nanochannels between neighboring layers. A surface of the layers of the graphene-based material defines the nanochannels to possess a desired electrical charge to increase a filtering efficiency of the graphene-based membrane for the hydrated ions a same size of the nanochannels are engineered for maintaining a desired flow though the graphene based membrane. A fluid stream comprises the hydrated ions towards the nanochannels of the graphene-based membrane is directed for filtering of the hydrated ions from the fluid stream. USE - Method for separating hydrated ions from fluid stream. ADVANTAGE - The method allows charge transfer to take place in the restored graphene network, thus confreres the electrical conductivity to the material. The engineering of the surface charge of the membrane offered a new venue for increasing the overall salt rejection, without constraining the water flux. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of showing preparation of chip-mounted graphene oxide membranes.