Abstract Magnetic-clay (MtMag) and magnetic-organoclay (O100MtMag) nanocomposites were synthesized, characterized evaluated for arsenic adsorption. Batch adsorption experiments performed varying pH conditions initial As(V) concentration, while successive cycles made in order to evaluate the materials reuse. The highest removal efficiency (9 ± 1 mg g?1 7.8 ± 0.8 mg g?1 MtMag O100MtMag, respectiv...