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Retention of chromate ion by conventional and N-ethylpyridinium strongly basic anion exchange resins by Violeta Neagu; I. Untea; Elena Tudorache; Cornelia Luca is a Materials Science article available to read on EtoBox.

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A comparative analysis of the behaviour of two strong base anion exchangers with different chemical structures, namely a noncommon strong base anion exchanger containing 4-vinyl-1-ethylpyridinium chloride structural units from the quaternization of the gel type 4-vinylpyridine:8% divinylbenzene copolymer and a commercial type I and gel styrene strong base anion exchanger, Purolite A 400, in the retention process of CrO 2À 4 anion from K 2 CrO 4 aqueous solutions was investigated. For this, using the batch method, the ion-exchange equilibrium and kinetics studies were performed. From these studies the following aspects were observed: (a) the two resins had the retention capacities of CrO 2À 4 anion of the same values with those of their exchange capacities, a higher value being for the pyridine resin; (b) the ionexchange isotherms and the separation factors showed that both resins exhibited a much higher preference for CrO 2À 4 anion over Cl À anion, the higher preference having the styrene resin; (c) for both resins appeared the same ion-exchange rates and using Boy-Adamson diffusion equation, the ion diffusion apparent coefficients were calculated, they having values of 1.587 Â 10

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Author

Violeta Neagu; I. Untea; Elena Tudorache; Cornelia Luca

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1381-5148)

Published

2003

Language

EN

Field

Materials Science (Physical Sciences)