To used nanosized LaFeO3, for adsorbing iron. manganese and arsenic from aqueous solution. The results showed that nanosized of LaFeO3 have absorbing ability for As (III), As (V), Fe (III), Mn (II) according to isothermar mode langmuir. The adsorption capacity of LaFeO3 nanoslzed are 55.09 mg/g for As (II)): 60.74 mg/g for As (III): 115..92 mg/g for Fe (III): 78.08mg/g for Mn (II).