Fig. 2.
Waste-derived adsorbents for metal ions removal. (a) Schema of the synthesis of a new nanocomposite (SCZ), spherical carbon (SC) loaded with zerovalent iron (ZVI), and its application in Cr(VI) adsorption. (b) Schematic diagram of Cr(VI) removal mechanism by SCZ [144], Copyright © 2018, American Chemical Society.
