Sorption and reduction of chromiumion ions by the chelating ion exchanger Diaion CR20

• Autorzy: Wójcik Grzegorz

Identyfikatory

DOI

10.5277/ppmp19056

• Języki publikacji: EN

Abstrakty

EN

The chelating ion exchanger Diaion CR20 was applied for removal of chromium(VI) ions in the pH range from 1.5 to 10 and in the presence of 1 M H₂SO₄. The speciation analysis was used to predict the reduction process. Reduction of chromium(VI) to chromium (III) was observed during the chromium(VI) ions sorption. The kinetic parameters for the pseudo-first-order and pseudo-second-order, Elovich and intraparticle diffusion models were calculated. The most common three isotherm models: Freundlich, Langmuir and Dubinin-Radushkevich were used to describe chromium(VI) uptake. It was proved that the polyamine groups present in selected ion exchanger are able to sorb both chromium(VI) and (III) ions. The maximal sorption capacity towards chromium(VI) ions was estimated at pH 1.5 – 169.49 mg Cr(VI)/g and 159.31 mg Cr(VI)/g in 1 M H₂SO₄. Both static and column methods were used in the investigations.

Słowa kluczowe

EN

chromium(III); chromium(VI); reduction; ion exchange; speciation; chelating resin

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 6
• Strony: 1382--1393
• Opis fizyczny: Bibliogr. 24 poz., rys., tab., wykr., wz.

Twórcy

autor

Wójcik Grzegorz

• Maria Curie-SklodowskaUniversity, Faculty of Chemistry, Department of Inorganic Chemistry, M. Curie-Sklodowskiej Sq. 2, 20-031 Lublin, Poland

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).