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Kinetics of Sorption of Cadmium and Cobalt Cations from Diluted Solutions by a Titanium-Phosphate-Based Sorbent

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Abstract

The kinetic properties of the sorbent with respect to cadmium and cobalt ions from dilute solutions have been studied in detail. To determine the limiting stage in the general mechanism of sorption, models of external and internal diffusion, as well as models of pseudo-first and pseudo-second order reactions were used. It is shown that, in the initial period of sorption time, the total rate is controlled by the mechanism of film diffusion. It has been established that when the sorbent is 99% saturated, internal diffusion in the pores is the limiting stage. It has been shown that the chemical interaction between the dissolved substances and the sorbent surface is most adequately described by the pseudo-second order reaction model. The efficiency of the sorbent was confirmed during the sorption of cadmium and cobalt ions in the presence of a high concentration of calcium ions.

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Funding

This research was carried out with the financial support of the Russian Science Foundation within the framework of scientific project no. 17-19-01522 P.

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Authors and Affiliations

  1. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Russian Academy of Sciences Kola Science Center, Russian Academy of Sciences, 184209, Apatity, Russia

    M. V. Maslova, P. E. Evstropova & L. G. Gerasimova

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  1. M. V. Maslova
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  2. P. E. Evstropova
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  3. L. G. Gerasimova
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Correspondence to M. V. Maslova.

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Maslova, M.V., Evstropova, P.E. & Gerasimova, L.G. Kinetics of Sorption of Cadmium and Cobalt Cations from Diluted Solutions by a Titanium-Phosphate-Based Sorbent. Prot Met Phys Chem Surf 58, 462–468 (2022). https://doi.org/10.1134/S2070205122030145

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  • DOI: https://doi.org/10.1134/S2070205122030145

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