Adsorpce Cesia z vodných roztoků bentonitem. Srovnání vícevrstevné sorpce s modelem výměny iontů

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F07%3A00016091" target="_blank" >RIV/61989100:27360/07:00016091 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Cesium uptake from aqueous solutions by Bentonite: A comparison of multicomponent sorption with Ion-exchange models

Popis výsledku v původním jazyce

The removal of cesium from concentrated aqueous solutions into Ca/Mg - bentonite for a wide range of bentonite - to - water (m/V) ratios was studied experimentally and theoretically. Using the batch techniques, the equilibrium of Cs uptake was measured.The nonlinear character of cesium sorption substantially influenced by the m/V ratio was observed. The experimental data were evaluated using multicomponent Langmuir isotherm and ion - exchange model based on the ion-exchange reaction between Cs+ and M2+(Ca2+ Mg2+) initially sorbed on bentonite. Constants k 1,Cs = 0.521 mmol .g-1, k 2,Cs = 968 L .mol-1, and k 2 ,M = 592 L .mol-1 were obtained for Cs uptake described by multicomponent Langmuir isotherm. For the ion-exchange model, the thermodynamic equilibrium constant K = 75.5 mL .g-1 with a standard deviation of s K = 17.4 m L .mol-1 was determined. Using t test, the calculated data of multicomponent Langmuir and ion-exchange isotherm were fit to experimental data, and the best agreem

Název v anglickém jazyce

Cesium uptake from aqueous solutions by Bentonite: A comparison of multicomponent sorption with Ion-exchange models

Popis výsledku anglicky

The removal of cesium from concentrated aqueous solutions into Ca/Mg - bentonite for a wide range of bentonite - to - water (m/V) ratios was studied experimentally and theoretically. Using the batch techniques, the equilibrium of Cs uptake was measured.The nonlinear character of cesium sorption substantially influenced by the m/V ratio was observed. The experimental data were evaluated using multicomponent Langmuir isotherm and ion - exchange model based on the ion-exchange reaction between Cs+ and M2+(Ca2+ Mg2+) initially sorbed on bentonite. Constants k 1,Cs = 0.521 mmol .g-1, k 2,Cs = 968 L .mol-1, and k 2 ,M = 592 L .mol-1 were obtained for Cs uptake described by multicomponent Langmuir isotherm. For the ion-exchange model, the thermodynamic equilibrium constant K = 75.5 mL .g-1 with a standard deviation of s K = 17.4 m L .mol-1 was determined. Using t test, the calculated data of multicomponent Langmuir and ion-exchange isotherm were fit to experimental data, and the best agreem

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DD - Geochemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název periodika

Langmuir

ISSN

0743-7463

e-ISSN

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Svazek periodika

23

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

1227-1233

Kód UT WoS článku

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EID výsledku v databázi Scopus

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