Abstract
The adsorption kinetics of nickel(II) and copper(II) ions by alumosilicates modified with N,N'-bis (3-triethoxysilylpropyl) thiocarbamide (BTM-3) and HCl is studied using the kinetic pseudo-first and pseudo-second order models. It is shown that when aluminosilicates are modified the time for equilibrium establishment is reduced by factors of 1.33 for adsorption of copper(II) ions and 2 for nickel(II) ions. The rate and energy of adsorption increase. It is established that the kinetics of the adsorption of the studied ions is best described by a pseudo-second order model. At the same time, the values of the correlation coefficients are 0.997–0.998. The maximum value of the adsorption rate constant of 33.7 × 10–5 g/(mmol min) corresponds to nickel(II) ions for aluminosilicates modified with HCl. The initial adsorption rate is 8.70 × 10–3 mmol/(g min). The maximum value of the adsorption rate constant value of 2.91 × 10–5 g/(mmol min) for aluminosilicates modified with BTM-3 corresponds to Cu(II) ions.
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This work was supported by the Russian Foundation for Basic Research, project no. 18-08-00718.
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Translated by Sh. Galyaltdinov
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Filatova, E.G., Pozhidaev, Y.N. & Pomazkina, O.I. Adsorption Kinetics of Nickel(II) and Copper(II) Ions by Modified Aluminosilicates. Prot Met Phys Chem Surf 55, 858–863 (2019). https://doi.org/10.1134/S2070205119050083
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DOI: https://doi.org/10.1134/S2070205119050083