Table 1 The degree of adsorption of Cu(II), Cd(II), Pb(II), Fe(III), Ni(II), and Mn(II) ions by 4-vinylpyridine-styrene copolymer, in situ immobilized on silica surface, as a function of the medium acidity
Ions | Degree of adsorption (R, %) | ||||
|---|---|---|---|---|---|
pH 1.0 HCl | pH 1.7 oxalate buffer | pH 4.0 phthalate buffer | Distilled water | pH 8.4 ammonium acetate buffer | |
Cu(II) | 10.26 | 30.23 | 34.78 | 63.09 | 50.70 |
Cd(II) | 4.65 | 13.19 | 24.35 | 95.38 | 36.82 |
Pb(II) | 56.61 | 100.00 | 58.54 | 85.65 | 59.19 |
Fe(III) | 11.69 | 20.00 | 22.32 | 100.00 | 37.03 |
Ni(II) | 39.54 | 80.33 | 63.03 | 100.00 | 66.17 |
Mn(II) | 3.41 | 11.50 | 6.17 | 60.63 | 25.85 |