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. Author manuscript; available in PMC: 2020 Aug 13.
Published in final edited form as: Appl Surf Sci. 2019;471:8–17. doi: 10.1016/j.apsusc.2018.11.240

Fig. 7.

Fig. 7.

(a) Competitive adsorption of Cd(II), Ni(II), Zn(II), Co(II), Pb(II), and Cu(II) on rGO, rGO/magnetite, rGO/silver, and rGO/magnetite/silver nanohybrids and (b) relative amounts of metal ions adsorbed on rGO, rGO/magnetite, rGO/silver, and rGO/magnetite/silver nanohybrids (mole percentage). Experimental conditions: m/V = 0.2 g/L; initial pH = 4.0 ± 0.1; [Cd(II)]0 = [Ni(II)]0 = [Zn(II)]0 = [Co(II)]0 = [Pb(II)]0 = [Cu(II)]0 = 1 mM; and T = 298 K.