90
4 Investigation into the Adsorption of Cadmium and Lead …
0
20
40
60
80
100
0
0.2
0.4
0.6
0.8
1
1.2
DesorpƟon %
ConcentraƟon (M)
Cd-HCl
Cd-EDTA
Cd-HNO3
0
20
40
60
80
100
0
0 . 2
0 . 4
0 . 6
0 . 8
1
1 . 2
DesorpƟon %
ConcentraƟon (M)
Pb-HCl
Pb-EDTA
Pb-HNO3
a
b
Fig. 4.8 a Influence of eluent concentration on cadmium desorption, b influence of eluent
concentration on cadmium desorption
appeared mostly consistent up to the fourth phase, with a 3% drop in bead mass
in the fifth phase. This improvement could be attributed to the beads ‘cross-linking
process with glutaraldehyde, which strengthens the beads’ mechanical and chemical
performance in acid solution.
4 Investigation into the Adsorption of Cadmium and Lead …
0
20
40
60
80
100
0
0.2
0.4
0.6
0.8
1
1.2
DesorpƟon %
ConcentraƟon (M)
Cd-HCl
Cd-EDTA
Cd-HNO3
0
20
40
60
80
100
0
0 . 2
0 . 4
0 . 6
0 . 8
1
1 . 2
DesorpƟon %
ConcentraƟon (M)
Pb-HCl
Pb-EDTA
Pb-HNO3
a
b
Fig. 4.8 a Influence of eluent concentration on cadmium desorption, b influence of eluent
concentration on cadmium desorption
appeared mostly consistent up to the fourth phase, with a 3% drop in bead mass
in the fifth phase. This improvement could be attributed to the beads ‘cross-linking
process with glutaraldehyde, which strengthens the beads’ mechanical and chemical
performance in acid solution.