Fig. 7 | Scientific Reports

Fig. 7

From: Attapulgite/oyster shell composite reduces cadmium and lead bioavailability in acidic agricultural soils through synergistic adsorption and pH regulation

Fig. 7

pH-dependent removal performance and competitive adsorption characteristics of attapulgite-oyster shell composites. (a) Pb(II) and Cd(II) removal efficiencies as a function of initial pH (initial concentration: 50 mg/L for each metal). (b) Competitive adsorption behavior: Cd(II) uptake capacity in the presence of varying Pb(II) concentrations at pH 6 (equilibrium time: 24 h). (c) Competitive adsorption behavior: Pb(II) uptake capacity in the presence of varying Cd(II) concentrations at pH 6 (equilibrium time: 24 h).

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