Development of a Method for Regeneration of Spent Electrochemical Decontamination Solution on the Basis of Data on Speciation of Metal Ions in Solution

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

Development of a Method for Regeneration of Spent Electrochemical Decontamination Solution on the Basis of Data on Speciation of Metal Ions in Solution

Popis výsledku v původním jazyce

Spent electrochemical decontamination solution is a water solution containing oxalic and citric acids, Cr(III), Ni(II), considerable amount of Fe(III), radionuclides 59Fe, 60Co, 54Mn and 110Ag. This work is aimed to determine the form of the components and to predict how their speciation can be changed in order to facilitate the regeneration of spent solution. Speciation studies were focused on the effect of complexants on the iron hydroxide precipitation and on the co-precipitation of radionuclides. Itwas concluded, the process could be advantageous, providing that pH-value during Fe(III) precipitation is high enough. Experiments with simulant and real solution confirmed foregoing conclusion. More than 80% of iron was removed and the activity reduceddown to background values by adjusting pH higher than 10.5 while nearly all organics were left in the solution after the precipitation. Thus, the solution after the treatment can be used, repeatedly.

Název v anglickém jazyce

Development of a Method for Regeneration of Spent Electrochemical Decontamination Solution on the Basis of Data on Speciation of Metal Ions in Solution

Popis výsledku anglicky

Spent electrochemical decontamination solution is a water solution containing oxalic and citric acids, Cr(III), Ni(II), considerable amount of Fe(III), radionuclides 59Fe, 60Co, 54Mn and 110Ag. This work is aimed to determine the form of the components and to predict how their speciation can be changed in order to facilitate the regeneration of spent solution. Speciation studies were focused on the effect of complexants on the iron hydroxide precipitation and on the co-precipitation of radionuclides. Itwas concluded, the process could be advantageous, providing that pH-value during Fe(III) precipitation is high enough. Experiments with simulant and real solution confirmed foregoing conclusion. More than 80% of iron was removed and the activity reduceddown to background values by adjusting pH higher than 10.5 while nearly all organics were left in the solution after the precipitation. Thus, the solution after the treatment can be used, repeatedly.

Druh

D - Stať ve sborníku

CEP obor

DL - Jaderné odpady, radioaktivní znečištění a kontrola

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

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

Název statě ve sborníku

14th Radiochemical Conference

ISBN

80-01-02530-6

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

335-335

Název nakladatele

ČVUT

Místo vydání

Praha

Místo konání akce

Mariánské lázně

Datum konání akce

14. 4. 2002

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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