Recovery Process for Critical Metals: Selective Adsorption of Nickel(II) from Cobalt(II) at Acidic Condition and Elevated Temperature

Table 1

Initial concentrations of metal ions in the prepared single- and dual-component systems (molar ratio Ni(II) : Co(II) of 1 : 1 and 1 : 3) for the different adsorption experiments.

Single-component system (mmol · L^-1)	Dual-component system (Ni(II) and Co(II)) (mmol · L^-1)
—	1 : 1	1 : 3
0.030	—	—
1.0
2.8
4.5
5.6
11
17