Fig. 3From: Adsorptive Removal of Copper (II) Ions from Aqueous Solution Using a Magnetite Nano-Adsorbent from Mill Scale Waste: Synthesis, Characterization, Adsorption and Kinetic Modelling StudiesHRTEM images with a 20-nm scale bar of MNA at a 3 h b 5 h and c 7 h milling timeBack to article page