Removal of Heavy Metal Ion Using Polymer-Functionalized Activated Carbon: Aspects of Environmental Economic and Chemistry Education

Table 2

Metal affinity order of Ni, Cd and Zn.

Properties	Ni	Zn	Cd
Hydrated cation radii (Å)	4.04	4.30	4.26
Hydration energy (kJ/mol) (ΔGh)	−1980	−1955	−1755

[14, 15]; [16].