▎ 摘　　要

NOVELTY - A graphene sewage treatment agent comprises component A and component B; where component A comprises 0.1-0.17 wt.% modified graphene, 5.0-10.0 wt.% polyaluminum chloride, 1.0-2.0 wt.% hydrogen peroxide and balance water, and component B comprises 0.08-0.16 wt.% water-based organobentonite, 0.06-0.08 wt.% water-hydrogen-base bentonite, 0.1-0.5 wt.% cationic polyacrylamide, 2.0-3.0 wt.% copper sulfate and balance water. USE - Graphene sewage treatment agent. ADVANTAGE - The method is simple, low-cost and environment-friendly. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparation of graphene sewage treatment agent comprising taking 1/5-1/4 water, adding modified graphene, stirring for 2 hours, adding polyaluminum chloride and hydrogen peroxide, stirring for 0.5 hour, adding remaining water to obtain component A, 1/5-1/4 water, adding water-based organobentonite and water-hydrogen-base bentonite, stirring for 8 hours, adding cationic polyacrylamide and copper sulfate, stirred for 2 hours, and adding remaining water; and (2) application of graphene sewage treatment agent comprising adding component A to sewage, adjusting circulating water pH value to 8-9, forming dregs, adding component B, flocculating, and salvaging or filtering.