This research aims to synthesize composite Fe3O4/kitosan-polivinil alcohol/TiO2 as an effort to overcome tetracycline waste which pollutes the environment. The magnetic nanoparticle material Fe3O4 acts as a magnetic material, chitosan-polyvinyl alcohol as a barrier between Fe3O4 and TiO2 to prevent dissolution effects which can reduce the effectiveness of degradation, and TiO2 is used as a cata…