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

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>

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

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

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)

Publication year

2017

Confidentiality

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

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