Table 3 The degree of adsorption of Zn(II), Cu(II), Fe(III), Cd(II), and Pb(II) cations by synthesized composites as a function of the medium acidity
Ions | Degree of adsorption (%) | ||||
|---|---|---|---|---|---|
pH 1.0 HCl | pH 2.5 acetic acid | pH 5.0 acetate buffer | Distilled water | pH 8.0 ammonium acetate buffer | |
Partially crosslinked chitosan-clinoptilolite composite | |||||
Zn(II) | 10.60 | 0.00 | 0.00 | 32.60 | 47.33 |
Cu(II) | 0.00 | 2.5 | 10.00 | 65.25 | 86.00 |
Cd(II) | 7.5 | 2.5 | 3.75 | 49.50 | 37.00 |
Pb(II) | 27.00 | 47.00 | 13.75 | 97.75 | 99.00 |
Fe(III) | 0.00 | 2.50 | 15.00 | 42.50 | 90.00 |
Partially crosslinked chitosan-saponite composite | |||||
Zn(II) | 1.33 | 2.33 | 0.00 | 35.33 | 69.66 |
Cu(II) | 0.00 | 12.5 | 10.00 | 81.50 | 86.00 |
Cd(II) | 7.00 | 2.5 | 3.75 | 34.50 | 28.50 |
Pb(II) | 12.75 | 4.75 | 7.00 | 93.25 | 97.75 |
Fe(III) | 0.00 | 2.50 | 20.00 | 70.20 | 92.50 |