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 SM ISO690:2012DRUTSA, 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 |
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| Volumul 102 / 2006 / ISSN 0021-8995 /ISSNe 1097-4628 | ||||||
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| DOI:https://doi.org/10.1002/app.24278 | ||||||
| Pag. 3978-3985 | ||||||
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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. |
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| Cuvinte-cheie adsorption isotherms, Chromium, pH effects, Positive ions, Solutions, sorption |
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