Waste Foundry Sand as Permeable and Low Permeable Barrier for Restriction of the Propagation of Lead and Nickel Ions in Groundwater

Figure 2

Removal efficiencies of Pb⁺² and Ni⁺² ions onto WFS at different values of contact time and initial pH. (a) Lead (dosage = 2.5 g/100 mL, C_o = 50 mg/L, and speed = 250 rpm). (b) Nickel (dosage = 2.5 g/100 mL, C_o = 50 mg/L, and speed = 250 rpm).

(a)

(b)