▎ 摘　　要

NOVELTY - Preparing carbon-based polypyrrole composite material comprises (i) preparing ferroferric oxide/carbon-based material by using co-precipitation method to load ferric oxide on the carbon-based material to prepare ferric tetroxide/carbon-based material, (ii) preparing carbon-based polypyrrole composite material, dispersing the ferric tetroxide/carbon-based material in ultrapure water, ultrasonicating for 10-30 minutes, and adding pyrrole monomer, ultrasonicating for 10-30 minutes, dropping hydrochloric acid, ultrasonicating for 60-240 minutes, filtering to obtain the product, washing with water and methanol many times successively, placing in a vacuum drying oven at 60-80degrees Celsius for vacuum drying for 10-20 hours to prepare a carbon-based polypyrrole composite material. USE - The method for preparing carbon-based polypyrrole composite material useful for removing Perfluorooctanesulfonic acid (PFASs) in water (claimed). ADVANTAGE - The material is stable and not easy to run off, reduces the potential safety risk of nano-toxicity generated by the nano-particles, has a high adsorption capacity for anionic PFOA and PFOS in the environment, and realizes the efficient removal of PFOA and PFOS in water. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) carbon-based polypyrrole composite material, obtained by the method as mentioned above; and (2) method for removing PFASs from water by carbon-based polypyrrole composite material, comprising adding the carbon-based polypyrrole composite material to a water body polluted by PFOA or PFOS.