Time(minutes) Amount of metal ion adsorbed (mg/g), qe Amount of metal ion adsorbed (mg/g), Amount of metal ion adsorbed (mg/g), qe
  Ni(II) Cu(II) Zn(II)
5 0.077 0.069 0.069
10 0.078 0.071 0.071
15 0.078 0.071 0.071
20 0.079 0.072 0.071
25 0.080 0.073 0.072
30 0.080 0.073 0.073
40 0.081 0.074 0.074
50 0.082 0.074 0.074
(Mass of biomass 5g, temperature 25°C, pH 5.0, concentration 10mg/1, volume 50ml)
Table 3: Effect of contact time on metal ion removal.