Synthesis of reactive nanoscale zero valent iron using rectorite supports and its application for Orange II removal

► The nanoscale zero valent iron-rectorite composite was successfully synthesized. ► The growth of Fe crystal in the interlayer of rectorite resulted in nZVI particles at ca. 10.3 nm. ► The newly prepared nZVI-R possessed much higher efficiency for Orange II decolorization. ► The adsorption of Orange II on nZVI-R was detected at the beginning of reactions. ► nZVI-R can prevent the aggregation of nZVI and provide opportunity for contaminants treatment.