Figure 5From: Thiol-functionalized magnetite/graphene oxide hybrid as a reusable adsorbent for Hg2+ removalAdsorption isotherms and adsorption capacity. (a) Adsorption isotherms fitted with the Freundlich model (red line) for adsorption of Hg2+ on thiol-functionalized MGO and (b) adsorption capacity versus the cycling number with the initial concentration of 100 mg l-1 Hg2+.Back to article page