Adsorbent quantity (g)

q(mg/g)

Pb(II)

Cd(II)

Zn(II)

0.1 0.3 0.5 0.7 1.0 2.0

5.000 1.588 0.951 0.678 0.474 0.236

3.917 1.539 0.929 0.661 0.462 0.230

71.55 26.15 16.71 12.43 9.220 4.500