▎ 摘　　要

NOVELTY - Graphene or its derivatives, preferably graphene oxide and graphite oxide combined with a cylindrical filter, is claimed. USE - The graphene or its derivatives are useful in filter system for drinking water treatment in household area, in the industrial area and wastewater treatment. ADVANTAGE - The graphene or its derivatives can be installed in filter system at lower installation costs, requires less space, has lower cleaning costs for the filter system and lower labor costs when changing filters.