Radiolytic degradation of a new diglycol-diamide ligand for actinide and lanthanide co-extraction from spent nuclear fuel
Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo,...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Ossola, Annalisa [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016transfer abstract |
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| Schlagwörter: |
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| Umfang: |
6 |
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| Übergeordnetes Werk: |
Enthalten in: Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters - LI, Lifang ELSEVIER, 2020, RPC : the journal for radiation physics, radiation chemistry and radiation processing : a multidisciplinary journal linking science and industry, Oxford [u.a.] |
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| Übergeordnetes Werk: |
volume:124 ; year:2016 ; pages:246-251 ; extent:6 |
| Links: |
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| DOI / URN: |
10.1016/j.radphyschem.2015.12.013 |
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ELV029921945 |
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| 245 | 1 | 0 | |a Radiolytic degradation of a new diglycol-diamide ligand for actinide and lanthanide co-extraction from spent nuclear fuel |
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| 520 | |a Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. | ||
| 520 | |a Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. | ||
| 650 | 7 | |a Hydrolysis |2 Elsevier | |
| 650 | 7 | |a Actinides |2 Elsevier | |
| 650 | 7 | |a Partitioning |2 Elsevier | |
| 650 | 7 | |a Lanthanides |2 Elsevier | |
| 650 | 7 | |a DIAMEX |2 Elsevier | |
| 650 | 7 | |a Radiolysis |2 Elsevier | |
| 700 | 1 | |a Macerata, Elena |4 oth | |
| 700 | 1 | |a Tinonin, Dario A. |4 oth | |
| 700 | 1 | |a Faroldi, Federica |4 oth | |
| 700 | 1 | |a Giola, Marco |4 oth | |
| 700 | 1 | |a Mariani, Mario |4 oth | |
| 700 | 1 | |a Casnati, Alessandro |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Pergamon Press |a LI, Lifang ELSEVIER |t Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters |d 2020 |d RPC : the journal for radiation physics, radiation chemistry and radiation processing : a multidisciplinary journal linking science and industry |g Oxford [u.a.] |w (DE-627)ELV004848314 |
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10.1016/j.radphyschem.2015.12.013 doi GBVA2016017000008.pica (DE-627)ELV029921945 (ELSEVIER)S0969-806X(15)30139-0 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 004 VZ 54.00 bkl 85.00 bkl Ossola, Annalisa verfasserin aut Radiolytic degradation of a new diglycol-diamide ligand for actinide and lanthanide co-extraction from spent nuclear fuel 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Hydrolysis Elsevier Actinides Elsevier Partitioning Elsevier Lanthanides Elsevier DIAMEX Elsevier Radiolysis Elsevier Macerata, Elena oth Tinonin, Dario A. oth Faroldi, Federica oth Giola, Marco oth Mariani, Mario oth Casnati, Alessandro oth Enthalten in Pergamon Press LI, Lifang ELSEVIER Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters 2020 RPC : the journal for radiation physics, radiation chemistry and radiation processing : a multidisciplinary journal linking science and industry Oxford [u.a.] (DE-627)ELV004848314 volume:124 year:2016 pages:246-251 extent:6 https://doi.org/10.1016/j.radphyschem.2015.12.013 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 54.00 Informatik: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ AR 124 2016 246-251 6 045F 540 |
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10.1016/j.radphyschem.2015.12.013 doi GBVA2016017000008.pica (DE-627)ELV029921945 (ELSEVIER)S0969-806X(15)30139-0 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 004 VZ 54.00 bkl 85.00 bkl Ossola, Annalisa verfasserin aut Radiolytic degradation of a new diglycol-diamide ligand for actinide and lanthanide co-extraction from spent nuclear fuel 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Hydrolysis Elsevier Actinides Elsevier Partitioning Elsevier Lanthanides Elsevier DIAMEX Elsevier Radiolysis Elsevier Macerata, Elena oth Tinonin, Dario A. oth Faroldi, Federica oth Giola, Marco oth Mariani, Mario oth Casnati, Alessandro oth Enthalten in Pergamon Press LI, Lifang ELSEVIER Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters 2020 RPC : the journal for radiation physics, radiation chemistry and radiation processing : a multidisciplinary journal linking science and industry Oxford [u.a.] (DE-627)ELV004848314 volume:124 year:2016 pages:246-251 extent:6 https://doi.org/10.1016/j.radphyschem.2015.12.013 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 54.00 Informatik: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ AR 124 2016 246-251 6 045F 540 |
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10.1016/j.radphyschem.2015.12.013 doi GBVA2016017000008.pica (DE-627)ELV029921945 (ELSEVIER)S0969-806X(15)30139-0 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 004 VZ 54.00 bkl 85.00 bkl Ossola, Annalisa verfasserin aut Radiolytic degradation of a new diglycol-diamide ligand for actinide and lanthanide co-extraction from spent nuclear fuel 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Hydrolysis Elsevier Actinides Elsevier Partitioning Elsevier Lanthanides Elsevier DIAMEX Elsevier Radiolysis Elsevier Macerata, Elena oth Tinonin, Dario A. oth Faroldi, Federica oth Giola, Marco oth Mariani, Mario oth Casnati, Alessandro oth Enthalten in Pergamon Press LI, Lifang ELSEVIER Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters 2020 RPC : the journal for radiation physics, radiation chemistry and radiation processing : a multidisciplinary journal linking science and industry Oxford [u.a.] (DE-627)ELV004848314 volume:124 year:2016 pages:246-251 extent:6 https://doi.org/10.1016/j.radphyschem.2015.12.013 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 54.00 Informatik: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ AR 124 2016 246-251 6 045F 540 |
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10.1016/j.radphyschem.2015.12.013 doi GBVA2016017000008.pica (DE-627)ELV029921945 (ELSEVIER)S0969-806X(15)30139-0 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 004 VZ 54.00 bkl 85.00 bkl Ossola, Annalisa verfasserin aut Radiolytic degradation of a new diglycol-diamide ligand for actinide and lanthanide co-extraction from spent nuclear fuel 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Hydrolysis Elsevier Actinides Elsevier Partitioning Elsevier Lanthanides Elsevier DIAMEX Elsevier Radiolysis Elsevier Macerata, Elena oth Tinonin, Dario A. oth Faroldi, Federica oth Giola, Marco oth Mariani, Mario oth Casnati, Alessandro oth Enthalten in Pergamon Press LI, Lifang ELSEVIER Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters 2020 RPC : the journal for radiation physics, radiation chemistry and radiation processing : a multidisciplinary journal linking science and industry Oxford [u.a.] (DE-627)ELV004848314 volume:124 year:2016 pages:246-251 extent:6 https://doi.org/10.1016/j.radphyschem.2015.12.013 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 54.00 Informatik: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ AR 124 2016 246-251 6 045F 540 |
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10.1016/j.radphyschem.2015.12.013 doi GBVA2016017000008.pica (DE-627)ELV029921945 (ELSEVIER)S0969-806X(15)30139-0 DE-627 ger DE-627 rakwb eng 540 530 540 DE-600 530 DE-600 004 VZ 54.00 bkl 85.00 bkl Ossola, Annalisa verfasserin aut Radiolytic degradation of a new diglycol-diamide ligand for actinide and lanthanide co-extraction from spent nuclear fuel 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. Hydrolysis Elsevier Actinides Elsevier Partitioning Elsevier Lanthanides Elsevier DIAMEX Elsevier Radiolysis Elsevier Macerata, Elena oth Tinonin, Dario A. oth Faroldi, Federica oth Giola, Marco oth Mariani, Mario oth Casnati, Alessandro oth Enthalten in Pergamon Press LI, Lifang ELSEVIER Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters 2020 RPC : the journal for radiation physics, radiation chemistry and radiation processing : a multidisciplinary journal linking science and industry Oxford [u.a.] (DE-627)ELV004848314 volume:124 year:2016 pages:246-251 extent:6 https://doi.org/10.1016/j.radphyschem.2015.12.013 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 54.00 Informatik: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ AR 124 2016 246-251 6 045F 540 |
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Enthalten in Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters Oxford [u.a.] volume:124 year:2016 pages:246-251 extent:6 |
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Enthalten in Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters Oxford [u.a.] volume:124 year:2016 pages:246-251 extent:6 |
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Effect of anger, anxiety, and sadness on the propagation scale of social media posts after natural disasters |
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radiolytic degradation of a new diglycol-diamide ligand for actinide and lanthanide co-extraction from spent nuclear fuel |
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Radiolytic degradation of a new diglycol-diamide ligand for actinide and lanthanide co-extraction from spent nuclear fuel |
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Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. |
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Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. |
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Within the Partitioning and Transmutation strategies, great efforts have been devoted in the last decades to the development of lipophilic ligands able to co-extract trivalent Lanthanides (Ln) and Actinides (An) from spent nuclear fuel. Because of the harsh working conditions these ligands undergo, it is important to prove their chemical and radiolytic stability during the counter-current multi-stage extraction process. In the present work the hydrolytic and radiolytic resistance of the freshly prepared and aged organic solutions containing the new ligand (2,6-bis[(N-methyl-N-dodecyl)carboxamide]-4-methoxy-tetrahydro-pyran) were investigated in order to evaluate the impact on the safety and efficiency of the process. Liquid–liquid extraction tests with spiked solutions showed that the ligand extracting performances are strongly impaired by storing the samples at room temperature and in the light. Moreover, the extracting efficiency of the irradiated samples resulted to be influenced by gamma irradiation, while selectivity remains unchanged. Preliminary mass spectrometric data showed that degradation is mainly due to the acid-catalysed reaction of the ligand carboxamide and ether groups with the 1-octanol present in the diluent. |
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