Adsorption of arsenite and selenite using an inorganic ion exchanger based on Fe–Mn hydrous oxide

Handle URI:
http://hdl.handle.net/10754/597473
Title:
Adsorption of arsenite and selenite using an inorganic ion exchanger based on Fe–Mn hydrous oxide
Authors:
Szlachta, Małgorzata; Gerda, Vasyl; Chubar, Natalia
Abstract:
The adsorption behaviour and mechanism of As(III) and Se(IV) oxyanion uptake using a mixed inorganic adsorbent were studied. The novel adsorbent, based on Fe(III)-Mn(III) hydrous oxides and manganese(II) carbonate, was synthesised using a hydrothermal precipitation approach in the presence of urea. The inorganic ion exchanger exhibited a high selectivity and adsorptive capacity towards As(III) (up to 47.6mg/g) and Se(IV) (up to 29.0mg/g), even at low equilibrium concentration. Although pH effects were typical for anionic species (i.e., the adsorption decreased upon pH increase), Se(IV) was more sensitive to pH changes than As(III). The rates of adsorption of both oxyanions were high. Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) studies showed that the ion exchange adsorption of both anions took place via OH - groups, mainly from Fe(III) but also Mn(III) hydrous oxides. MnCO 3 did not contribute directly to As(III) and Se(IV) removal. A higher adsorptive capacity of the developed material towards As(III) was partly due to partial As(III) oxidation during adsorption. © 2011 Elsevier Inc.
Citation:
Szlachta M, Gerda V, Chubar N (2012) Adsorption of arsenite and selenite using an inorganic ion exchanger based on Fe–Mn hydrous oxide. Journal of Colloid and Interface Science 365: 213–221. Available: http://dx.doi.org/10.1016/j.jcis.2011.09.023.
Publisher:
Elsevier BV
Journal:
Journal of Colloid and Interface Science
KAUST Grant Number:
KUK-C1-017-12
Issue Date:
Jan-2012
DOI:
10.1016/j.jcis.2011.09.023
PubMed ID:
21968401
Type:
Article
ISSN:
0021-9797
Sponsors:
This work was funded by the Center-in-Development Award to Utrecht University (No. KUK-C1-017-12) by King Abdullah University of Science and Technology.Dr. Andrey Shchukarev (Umeä University, Sweden) is gratefully acknowledged for XPS analysis.
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Full metadata record

DC FieldValue Language
dc.contributor.authorSzlachta, Małgorzataen
dc.contributor.authorGerda, Vasylen
dc.contributor.authorChubar, Nataliaen
dc.date.accessioned2016-02-25T12:40:25Zen
dc.date.available2016-02-25T12:40:25Zen
dc.date.issued2012-01en
dc.identifier.citationSzlachta M, Gerda V, Chubar N (2012) Adsorption of arsenite and selenite using an inorganic ion exchanger based on Fe–Mn hydrous oxide. Journal of Colloid and Interface Science 365: 213–221. Available: http://dx.doi.org/10.1016/j.jcis.2011.09.023.en
dc.identifier.issn0021-9797en
dc.identifier.pmid21968401en
dc.identifier.doi10.1016/j.jcis.2011.09.023en
dc.identifier.urihttp://hdl.handle.net/10754/597473en
dc.description.abstractThe adsorption behaviour and mechanism of As(III) and Se(IV) oxyanion uptake using a mixed inorganic adsorbent were studied. The novel adsorbent, based on Fe(III)-Mn(III) hydrous oxides and manganese(II) carbonate, was synthesised using a hydrothermal precipitation approach in the presence of urea. The inorganic ion exchanger exhibited a high selectivity and adsorptive capacity towards As(III) (up to 47.6mg/g) and Se(IV) (up to 29.0mg/g), even at low equilibrium concentration. Although pH effects were typical for anionic species (i.e., the adsorption decreased upon pH increase), Se(IV) was more sensitive to pH changes than As(III). The rates of adsorption of both oxyanions were high. Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) studies showed that the ion exchange adsorption of both anions took place via OH - groups, mainly from Fe(III) but also Mn(III) hydrous oxides. MnCO 3 did not contribute directly to As(III) and Se(IV) removal. A higher adsorptive capacity of the developed material towards As(III) was partly due to partial As(III) oxidation during adsorption. © 2011 Elsevier Inc.en
dc.description.sponsorshipThis work was funded by the Center-in-Development Award to Utrecht University (No. KUK-C1-017-12) by King Abdullah University of Science and Technology.Dr. Andrey Shchukarev (Umeä University, Sweden) is gratefully acknowledged for XPS analysis.en
dc.publisherElsevier BVen
dc.subjectAdsorptionen
dc.subjectArseniteen
dc.subjectFe-Mn hydrous oxideen
dc.subjectInorganic ion exchangeren
dc.subjectSeleniteen
dc.titleAdsorption of arsenite and selenite using an inorganic ion exchanger based on Fe–Mn hydrous oxideen
dc.typeArticleen
dc.identifier.journalJournal of Colloid and Interface Scienceen
dc.contributor.institutionUtrecht University, Utrecht, Netherlandsen
kaust.grant.numberKUK-C1-017-12en
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