Sorption of Cr(III)-containing cations on strongly basic anion exchangers

Drutsa R; Gutsanu Vasile; Rusu Vasile

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DRUTSA, R, GUTSANU, Vasile, RUSU, Vasile. Sorption of Cr(III)-containing cations on strongly basic anion exchangers. In: Journal of Applied Polymer Science, 2006, vol. 102, pp. 3978-3985. ISSN 0021-8995. DOI: https://doi.org/10.1002/app.24278

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Journal of Applied Polymer Science

Volumul 102 / 2006 / ISSN 0021-8995 /ISSNe 1097-4628

Sorption of Cr(III)-containing cations on strongly basic anion exchangers

DOI:https://doi.org/10.1002/app.24278

Pag. 3978-3985

Drutsa R¹, Gutsanu Vasile², Rusu Vasile³

¹ Technical University of Moldova,
² Moldova State University,
³ Institute of Chemistry of the Academy of Sciences of Moldova

Disponibil în IBN: 14 decembrie 2023

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It is shown that strongly basic anion exchangers AV-17 and Varion-AD in definite conditions are able to retain Cr(III)-containing ions from Cr(III) sulfate solution. It is found that the sorption of Cr(III)-containing ions on the polymers is essentially dependent on the pH, temperature, and Cr(III) sulfate concentration. The maximum temperature dependence of sorption was found to be about 60°C. The sorption isotherms are well described by Langmuir's equations. The sorption kinetics is determined by the diffusion of Cr(III)-containing ions into polymer's phase. It is assumed that the Cr(in)-containing ions are retained through formation, in polymer's phase, of the jarosite-type mineral compounds: R₄N[Cr₃(OH) ₆(SO₄)₂], H₃O[Cr₃(OH) ₆(SO₄)₂], and K[Cr₃(OH) ₆(SO₄)₂]. For comparison of sorptional capacities, the sorption of Cr(III)-containing ions was determined on different cation and anion exchangers.

Cuvinte-cheie
adsorption isotherms, Chromium, pH effects, Positive ions, Solutions, sorption

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