Comparison of sorbents for caesium removal from aqueous environment

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of sorbents for caesium removal from aqueous environment

Popis výsledku v původním jazyce

This study compares the sorbent effectiveness of a caesium removal from water solutions. Caesium, namely the 137Cs isotope, is a fission product of uranium (235U) breakdown. The isotope 137Cs with the half-life decay of 30 years is an undesirable contaminant in a primary coolant of nuclear power plant. The 137Cs isotope is main contributor to overall radioactivity in a reactor coolant. Caesium leaks in the coolant water of a primary circuit trough microcracks in fuel rods. Damage of fuel rods is quite common, but usually less than 0,02 % per a reactor campaign. Caesium in the technological water needs to be removed due to high radioactivity. This work compares two zeolite materials and their ability to remove caesium from aqueous solution. Zeolites are, in general, hydrated aluminosilicate materials that behave as cation exchangers. They are able to exchange cations from an aqueous solution for cations located on their surface, particularly for Na+ , K+ , Mg2+ and Ca2+. A natural zeolite and its modified form with the high content of clinoptilolite were used for sorption experiments. The modification was performed using Co(NO3)2 and K4[Fe(CN)6] in order to form K2Co[Fe(CN)6] on a zeolite surface. Zeolites were characterized by an infrared and Raman Spectroscopy, SEM, and BET surface area measurement. Sorption experiments were conducted in a batch arrangement. The optimum pH for sorption and parameters of Langmuir isotherm were determined. The influence of accompanying monovalent and divalent cations on the sorption of caesium was observed.

Název v anglickém jazyce

Comparison of sorbents for caesium removal from aqueous environment

Popis výsledku anglicky

This study compares the sorbent effectiveness of a caesium removal from water solutions. Caesium, namely the 137Cs isotope, is a fission product of uranium (235U) breakdown. The isotope 137Cs with the half-life decay of 30 years is an undesirable contaminant in a primary coolant of nuclear power plant. The 137Cs isotope is main contributor to overall radioactivity in a reactor coolant. Caesium leaks in the coolant water of a primary circuit trough microcracks in fuel rods. Damage of fuel rods is quite common, but usually less than 0,02 % per a reactor campaign. Caesium in the technological water needs to be removed due to high radioactivity. This work compares two zeolite materials and their ability to remove caesium from aqueous solution. Zeolites are, in general, hydrated aluminosilicate materials that behave as cation exchangers. They are able to exchange cations from an aqueous solution for cations located on their surface, particularly for Na+ , K+ , Mg2+ and Ca2+. A natural zeolite and its modified form with the high content of clinoptilolite were used for sorption experiments. The modification was performed using Co(NO3)2 and K4[Fe(CN)6] in order to form K2Co[Fe(CN)6] on a zeolite surface. Zeolites were characterized by an infrared and Raman Spectroscopy, SEM, and BET surface area measurement. Sorption experiments were conducted in a batch arrangement. The optimum pH for sorption and parameters of Langmuir isotherm were determined. The influence of accompanying monovalent and divalent cations on the sorption of caesium was observed.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 6 th International Conference on Chemical Technology

ISBN

978-80-86238-77-7

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

436-442

Název nakladatele

Česká společnost průmyslové chemie

Místo vydání

Praha

Místo konání akce

Mikulov

Datum konání akce

16. 4. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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