▎ 摘　　要

NOVELTY - Salt-ion self-retention sea water desalination based on continuous filtration method involves using a graphene oxide film as a filter membrane, immersing the graphene oxide film in an aqueous solution containing salt (A) to a swelling state, and then pressure filtering the graphene oxide film, using the applied pressure to squeeze the hydrated-ion formed by dissolving the salt (A) in the graphene oxide film, deforming the hydrated-ions, thereby reducing the size of the hydrated-ions, entering the graphene oxide film and reducing the distance between the layers of the film, thereby intercepting the larger hydrated-ions formed after dissolving the salt (A) in the solution, and collecting the hydrated ions, obtaining drawing solution of graphene peroxide film, then, using the draw solution as the salt solution to be processed for the next filtration treatment process, and repeating the above steps, and performing continuous filtration until a draw solution that meets the standard. USE - Salt-ion self-retention desalination of large scale seawater, brackish water, industrial high salt wastewater, and wastewater discharged from chemical engineering, medicine, and electronic industry. ADVANTAGE - The method is easy, simple, and economical, and enables salt-ion self-retention sea water desalination capable of reducing energy loss in the operation process, does not need special high pressure-resistant material, reducing the high voltage potential safety hazard in the traditional reverse osmosis process, and has strong operation environment universality, and has high potential in water treatment. DETAILED DESCRIPTION - Salt-ion self-retention sea water desalination based on continuous filtration method involves using a graphene oxide film as a filter membrane, immersing the graphene oxide film in an aqueous solution containing salt (A) to a swelling state, and then pressure filtering the graphene oxide film, using the applied pressure to squeeze the hydrated-ion formed by dissolving the salt (A) in the graphene oxide film, deforming the hydrated-ions, thereby reducing the size of the hydrated-ions, entering the graphene oxide film and reducing the distance between the layers of the film, thereby intercepting the larger hydrated-ions formed after dissolving the salt (A) in the solution, and collecting the hydrated ions, obtaining drawing solution of graphene peroxide film, then, using the draw solution as the salt solution to be processed for the next filtration treatment process, and repeating the above steps, and performing continuous filtration until a draw solution that meets the standard. The graphene oxide film comprises a laminate structure of a composite material.