Leaching of irradiated polymers: solution characterization and actinides complexation
Identifieur interne : 000000 ( Main/Exploration ); suivant : 000001Leaching of irradiated polymers: solution characterization and actinides complexation
Auteurs : Elodie Fromentin [France]Source :
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Abstract
The first aim of this work is to study the degradation of an industrial polyesterurethane (PURm) by radio-oxidation and then by leaching in an alkaline aqueous solution. The second aim is to measure the complexing power of hydrosoluble degradation products (HDP) with actinides. To reach these goals, PURm was first characterized and then radio-oxidized at room temperature with gamma-rays up to 10 MGy. Second, it was leached at pH 13.3 at different temperature values. Numerous analytical techniques were employed in order to characterize the HDP which were obtained. Europium(III) was used as an analogue of actinides(III) and the behavior of HDP with europium(III) was analyzed by time-resolved luminescence spectroscopy (TRLS). Whatever the received dose by PURm, adipic acid and butane-1,4-diol are the two main HDP in leachates. The leaching data acquired at 40 and 60°C, on the 1 MGy radio-oxidized PURm, correlate with the model given by Yoon et al. (1997). However, the data at room temperature (22°C in average) are not in agreement with the model. Nevertheless, it seems that the plateau which was reached at long-term leaching is the same whatever the temperature used in this study.The results allow to conclude that the predominant mechanism occurring during the leaching of unirradiated and radio-oxidized PURm in an alkaline medium is the hydrolysis of the soft segments ester groups.The complexation of europium(III) by HDP in alkaline medium was demonstrated. The measurement of the complexing power and the identification of ligands was achieved under certain conditions.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Leaching of irradiated polymers: solution characterization and actinides complexation</title><title xml:lang="fr">Lixiviation des polymères irradiés : caractérisation de la solution et complexation des actinides</title><author><name sortKey="Fromentin, Elodie" sort="Fromentin, Elodie" uniqKey="Fromentin E" first="Elodie" last="Fromentin">Elodie Fromentin</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-20540" status="VALID"> <orgName>CEA Saclay</orgName> <orgName type="acronym">CEA</orgName> <desc> <address> <addrLine>91191 Gif-sur-Yvette cedex</addrLine> <country key="FR"></country> </address> <ref type="url">http://www-centre-saclay.cea.fr/</ref> </desc> <listRelation> <relation active="#struct-300016" type="direct"></relation> </listRelation> <tutelles><tutelle active="#struct-300016" type="direct"><org type="institution" xml:id="struct-300016" status="VALID"> <orgName>Commissariat à l'énergie atomique et aux énergies alternatives</orgName> <orgName type="acronym">CEA</orgName> <desc> <address> <addrLine>Centre de SaclayCentre de GrenobleCentre de Cadaracheetc</addrLine> <country key="FR"></country> </address> <ref type="url">http://www.cea.fr/</ref> </desc> </org></tutelle></tutelles></hal:affiliation><country>France</country></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">HAL</idno><idno type="RBID">Hal:tel-01622137</idno><idno type="halId">tel-01622137</idno><idno type="halUri">https://hal.archives-ouvertes.fr/tel-01622137</idno><idno type="url">https://hal.archives-ouvertes.fr/tel-01622137</idno><date when="2017-10-02">2017-10-02</date><idno type="wicri:Area/Hal/Corpus">000089</idno><idno type="wicri:Area/Hal/Curation">000089</idno><idno type="wicri:Area/Hal/Checkpoint">000000</idno><idno type="wicri:explorRef" wicri:stream="Hal" wicri:step="Checkpoint">000000</idno><idno type="wicri:Area/Main/Merge">000000</idno><idno type="wicri:Area/Main/Curation">000000</idno><idno type="wicri:Area/Main/Exploration">000000</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Leaching of irradiated polymers: solution characterization and actinides complexation</title><title xml:lang="fr">Lixiviation des polymères irradiés : caractérisation de la solution et complexation des actinides</title><author><name sortKey="Fromentin, Elodie" sort="Fromentin, Elodie" uniqKey="Fromentin E" first="Elodie" last="Fromentin">Elodie Fromentin</name><affiliation wicri:level="1"><hal:affiliation type="laboratory" xml:id="struct-20540" status="VALID"> <orgName>CEA Saclay</orgName> <orgName type="acronym">CEA</orgName> <desc> <address> <addrLine>91191 Gif-sur-Yvette cedex</addrLine> <country key="FR"></country> </address> <ref type="url">http://www-centre-saclay.cea.fr/</ref> </desc> <listRelation> <relation active="#struct-300016" type="direct"></relation> </listRelation> <tutelles><tutelle active="#struct-300016" type="direct"><org type="institution" xml:id="struct-300016" status="VALID"> <orgName>Commissariat à l'énergie atomique et aux énergies alternatives</orgName> <orgName type="acronym">CEA</orgName> <desc> <address> <addrLine>Centre de SaclayCentre de GrenobleCentre de Cadaracheetc</addrLine> <country key="FR"></country> </address> <ref type="url">http://www.cea.fr/</ref> </desc> </org></tutelle></tutelles></hal:affiliation><country>France</country></affiliation></author></analytic></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term> hydrolysis </term><term> hydrosoluble molecules </term><term> radio-oxidation </term></keywords><keywords scheme="mix" xml:lang="fr"><term> complexation </term><term> europium</term><term> hydrolyse </term><term> molécules hydrosolubles </term><term> radio-oxydation </term><term>polyuréthane </term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The first aim of this work is to study the degradation of an industrial polyesterurethane (PURm) by radio-oxidation and then by leaching in an alkaline aqueous solution. The second aim is to measure the complexing power of hydrosoluble degradation products (HDP) with actinides. To reach these goals, PURm was first characterized and then radio-oxidized at room temperature with gamma-rays up to 10 MGy. Second, it was leached at pH 13.3 at different temperature values. Numerous analytical techniques were employed in order to characterize the HDP which were obtained. Europium(III) was used as an analogue of actinides(III) and the behavior of HDP with europium(III) was analyzed by time-resolved luminescence spectroscopy (TRLS). Whatever the received dose by PURm, adipic acid and butane-1,4-diol are the two main HDP in leachates. The leaching data acquired at 40 and 60°C, on the 1 MGy radio-oxidized PURm, correlate with the model given by Yoon et al. (1997). However, the data at room temperature (22°C in average) are not in agreement with the model. Nevertheless, it seems that the plateau which was reached at long-term leaching is the same whatever the temperature used in this study.The results allow to conclude that the predominant mechanism occurring during the leaching of unirradiated and radio-oxidized PURm in an alkaline medium is the hydrolysis of the soft segments ester groups.The complexation of europium(III) by HDP in alkaline medium was demonstrated. The measurement of the complexing power and the identification of ligands was achieved under certain conditions.</div></front></TEI><affiliations><list><country><li>France</li></country></list><tree><country name="France"><noRegion><name sortKey="Fromentin, Elodie" sort="Fromentin, Elodie" uniqKey="Fromentin E" first="Elodie" last="Fromentin">Elodie Fromentin</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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