▎ 摘　　要

NOVELTY - Preparing composite flocculant involves adding chitosan and graphene uniformly, adding glacial acetic acid, under stirring for period of time, adding sodium silicate into constant temperature water bath for crosslinking, followed by washing with alkaline solution, drying, grinding, screening and finally obtain desired cross-linked chitosan/activated carbon. The mass ratio of chitosan, graphene and glacial acetic acid is 8-10:3-2:1. USE - Method for preparing composite flocculant (claimed). ADVANTAGE - The method enables to prepare composite flocculant has simple process, stable adsorption flocculation effect, flocculation settling effect, and effectively improves removal rate of processed waste water, and does not generate secondary pollution with good application prospect.