Arsenic (V) adsorption from aqueous solution onto goethite, hematite, magnetite and zero-valent iron: Effects of pH, concentration and reversibility

► Hematite, goethite, zero-valent iron and magnetite were used to remove As(V). ► Hematite is a suitable adsorbent over wide ranges of pH and As(V) concentrations. ► Arsenate adsorption isotherms are well fitted with the Langmuir model. ► Adsorption capacity is related to the iron content of adsorbents. ► Arsenate desorption from hematite and zero-valent iron is negligible.