Removal of Co2+ ions from aqueous solution by cation exchange sorption onto NiO

Kinetics of adsorption of metal ions on inorganic materials: A review

“…The film diffusion was the mechanism controlling the rate of Co(II) uptake onto NiO [208]. The values of diffusion coefficient were found to be 4.00 × 10 − 3 , 5.60 × 10 − 3 and 8.60 × 10 − 3 min − 1 at 303, 313 and 323 K, respectively.…”

Cation exchange removal of Zn from aqueous solution by NiO

“…Being porous in nature, it exhibits adsorption capability for divalent metal cations [15][16][17][18]. The adsorbent NiO may be used to control the mobility of metal ions in the environment.…”

Adsorption of metal ions by clays and inorganic solids

“…Naeem et al 195 reported Co(II) adsorption on NiO by an endothermic process with Langmuir capacities of 8.13 Â 10 À5 to 8.93 Â 10 À5 mol g À1 (at 303 to 323 K). The adsorption capacities increased from 6.41 Â 10 À5 to 17.61 Â 10 À5 mol g À1 in the pH range of 7.0 to 8.5.…”