Arsenic (V) adsorption on Fe3O4 nanoparticle-coated boron nitride nanotubes

► The magnetic Fe3O4 nanoparticles were successfully loaded on boron nitride nanotube. ► The Fe3O4-functionalized BNNTs possess elevated the adsorption capacity for arsenic. ► Simple & rapid separation of magnetic metal-loaded adsorbent from water was achieved.