Dose (g) Adsorption efficiency (%)  Amount of adsorbed, q (mg/g)
0.050 0.100 0.150 0.200 0.250 0.050 0.100 0.150 0.200 0.250
Pb (II) 37.0 63.1 94.2 98.3 99.1 10.8 92.0 91.4 71.6 57.7
Table 3: Effect of adsorbent dose.