▎ 摘　　要

NOVELTY - A composite filtration membrane is produced on a polymer, ceramic or metal porous support substrate with an active filter element in the form of metallurgical graphene produced on the surface of liquid metal, and transferred to a porous substrate containing clusters of structural and/or transfer defects. The defects having size of 0.7-1 mm are selectively sealed with graphene oxide (GO). USE - Composite filtration membrane. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for production of the filtration membrane, which involves transferring monolayer graphene produced by metallurgical method onto a porous substrate. The metallurgical graphene is subjected to the action of a graphene oxide suspension in a mixture of water and/or alcohol containing 0.001-0.1 wt.% graphene oxide.