Highly selective recovery of Ni(II) in neutral and acidic media using a novel Ni(II)-ion imprinted polymer

Giove, Alessio; Ouardi, Youssef El; Sala, Alexandre; Ibrahim, Fatma; Hietala, S.; Sievänen, E.; Branger, Catherine; Laatikainen, Katri

doi:10.1016/j.jhazmat.2022.130453

Cited by 9 publications

(1 citation statement)

References 45 publications

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“…Extraction and adsorption are two common techniques for separating nickel and cobalt [11][12][13]. Since the adsorption technology does not require saponification in the separation process of nickel and cobalt, it avoids the generation of salty wastewater and shows potential advantages [14][15][16]. Adsorption materials are divided into organic materials and inorganic materials, such as chelating resin [17], cellulose [18], chitosan [19], inorganic silicone [20], activated carbon [21], etc.…”

Section: Introductionmentioning

confidence: 99%

Insight into the Mechanism of Cobalt-Nickel Separation Using DFT Calculations on Ethylenediamine-Modified Silica Gel

Yang

Yuan

et al. 2023

Materials

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The separation of Co(II) and Ni(II) from leaching solution is gaining interest because Co(II) and Ni(II) are increasingly used in emerging strategic areas, such as power batteries. Herein, the surface of silica gel is functionalized with 1,2-ethylenediamine and used for the separation of Co(II) and Ni(II). The Co(II) removal efficiency of the modified silica is 80.2%, with a 4-fold improvement in the separation factor. The geometry, frequency, and electrostatic potential of the ethylenediamine modified silica gel (en/SG) are calculated. The corresponding properties of M2+ (M-Co, Ni) adsorbed on en/SG in an aqueous solution are simulated and analyzed. The results show that ethylenediamine tends to form [Men(H2O)4]2+ after binding to M2+, and the binding ability of Co(II) to ethylenediamine is stronger. Besides, the thermodynamic calculations show that en/SG has a more negative Gibbs free energy when absorbing Co(II) in aqueous solution, so en/SG is more inclined to bind with Co(II) preferentially. It is the difference in complexation ability between Ni, Co, and ethylenediamine that enlarges the difference in the original physical adsorption, thus strengthening the separation performance. This work will provide guidance for a rational design of high-performance nickel-cobalt adsorption materials.

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