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Vermiculite as efficient sorbent of Ce-III and Ce-IV

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F17%3A86099160" target="_blank" >RIV/61989100:27360/17:86099160 - isvavai.cz</a>

  • Alternative codes found

    RIV/61989100:27600/17:86099160 RIV/61989100:27640/17:86099160 RIV/61989100:27740/17:86099160

  • Result on the web

    <a href="http://dx.doi.org/10.1071/EN16112" target="_blank" >http://dx.doi.org/10.1071/EN16112</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1071/EN16112" target="_blank" >10.1071/EN16112</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Vermiculite as efficient sorbent of Ce-III and Ce-IV

  • Original language description

    This study focussed on the mechanism of Ce-III and Ce-IV uptake on vermiculite (Ver), which has been studied sporadically. Chemical equilibrium and leaching experiments in acid solutions were evaluated using batch experiments and changes of mineral composition were monitored by X-ray powder diffraction analysis. The concentrations of Ce, Na, K, Ca, Mg, Al and Si were determined by atomic emission spectroscopy coupled with inductively coupled plasma (AES-ICP). The data for Ce-III uptake on Ver in neutral aqueous solution were fitted both with adsorption and ion-exchange models. The latter, with a calculated selectivity constant (K-V) over bar = 14.30 (L mmol(-1))(k-1), showed a better fit with experimental data than adsorption models. The uptake of Ce-III on Ver at pH 2 was also controlled by intensive leaching of cations from 2 : 1 layers and therefore these data were not fitted. A much higher uptake of Ce-IV on Ver (similar to 6 mequiv. g(-1), i.e., similar to 210 mg g(-1)) at pH 2 and 6 in comparison with the cation-exchange capacity of original vermiculite (1.28 mequiv. g(-1)) was found and explained. With regard to the different rate of Ce-IV species fixation on Ver, their different Ce-IV solubility in NaCl solution, aqueous acid solution (pH 2), and 3 M H2SO4, three species of Ce-IV bonded on vermiculite are proposed. They are ion-exchanged Ce-IV, Ce-IV-complex 1 and Ce-IV-complex 2. The Ce-IV species uptake on Ver was quantitatively determined both for pH 2 and 6. The new findings show a very effective method of cerium uptake, especially from acidic aqueous solutions.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10403 - Physical chemistry

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2017

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Environmental Chemistry

  • ISSN

    1448-2517

  • e-ISSN

  • Volume of the periodical

    14

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    AU - AUSTRALIA

  • Number of pages

    9

  • Pages from-to

    39-47

  • UT code for WoS article

    000392205800005

  • EID of the result in the Scopus database

    2-s2.0-85008873355