Pb extraction ability and simulated leachate ages
The amount of Pb extracted from the mine
tailings using the two simulated leachates with
respect to the varying ages of the leachates are
presented in Figure 1 as the % Pb extracted of the
total amount available (Table 2). Referring to Table
2, the initial concentration of Pb in Akra mine tailing
was 59.83 mg/kg. It can be seen from Figure 1 that
Pb extraction (%) from mine tailing by simulated
leachate ranged from 0% to nearly 70%. The Pb
extraction ability of the simulated leachates were very