Fig. 4From: Kinetics, equilibrium, and thermodynamics investigation on the adsorption of lead(II) by coal-based activated carbonEffect of pH on Pb(II) adsorption by CBAC (temperature: 298 K; Contact time: 60 min; Pb(II) concentration: 150 mg/L; CBAC dosage: 1.2 g/L; Solution volume: 100 mL)Back to article page