▎ 摘　　要

NOVELTY - Preparing polypyrrole/ferrous ferric oxide/ graphene composite material, comprises: (a) reacting graphene oxide and ferric chloride to obtain ferrous ferric oxide/graphene composite; and (b) adding hexadecyltrimethylammonium bromide, where hexadecyltrimethylammonium bromide is adsorbed on ferrous ferric oxide/graphene composite material, adding pyrrole monomer solution of ammonium persulfate and carrying out adsorption and oxidation reaction process at 5 degrees C to obtain polypyrrole/ferrous ferric oxide/ graphene composite material. USE - The polypyrrole/ferrous ferric oxide/graphene composite material is useful for treating chromium containing wastewater (all claimed). ADVANTAGE - The method provides polypyrrole/ferrous ferric oxide/ graphene composite material which has good dispersion and hydrophilicity, has increased active site reactions, thus improving the adsorption properties of heavy metals in water. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use of polypyrrole/ferrous ferric oxide/ graphene composite material for removing chromium in wastewater.