Contact time
Adsorption efficiency (%)
Amount of adsorbed, q (mg/g)
30
60
120
180
240
30
60
120
180
240
Pb (II)
98.6
98.8
99.1
99.1
99.1
57.2
57.4
57.6
57.6
57.6
Table 2:
Effect of contact time.
