Metodo para reducir la concentracion de arsenico en un medio acuoso que comprende poner en contacto el medio acuoso con un substrato adsorbente recubierto y adsorber el arsenico, donde dicho substrato contiene microparticulas recubiertas con nanoparticulas de oxido de hierro; purificador de agua; y metodo para fabricar dichos substratos

摘要

Methods for making nano-sized iron oxide or iron oxyhydroxide particle dispersions wherein the particles are coated onto a carrier substrate. Additionally, coated adsorbent compositions are provided and include the nano-sized iron oxide or iron oxyhydroxide particles adsorbed onto the surface of the substrate. Additionally, methods of using the coated adsorbent compositions to reduce arsenic levels in aqueous mediums are disclosed. Water purification units are also provided and include an adsorbent layer.