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Mahanty, B.; Bhattacharyya, A.; Mohapatra, P.K., E-mail: mpatra@barc.gov.in
Proceedings of the eight biennial symposium on emerging trends in separation science and technology: abstract book2018
Proceedings of the eight biennial symposium on emerging trends in separation science and technology: abstract book2018
AbstractAbstract
[en] Due to the long half life of 237Np (t1/2: 2.14 x 106 y), which is present in high level waste (HLW), there is a need to separate it to ease HLW management. Separation of Np from acidic feed solution containing different alpha emitters such as U, Pu and Np is a challenging task due to the co-existence of different oxidation states of Np and Pu in nitric acid feed solution. An attempt has been made to determine Np in the presence of U, Pu and Np from nitric acid feed solution. An extraction chromatographic resin containing Aliquat-336 coated on Chromosorb-W was used for the separation of Np from nitric acid based feed containing U, Pu and Np at 3-4 M HNO3. The oxidation state of Np was adjusted to +4 while that of Pu was adjusted to +3 to form anionic and neutral complexes respectively in 3-4 M HNO3. Under these feed conditions, U is present in the +6 oxidation state. Batch studies revealed the weight distribution coefficient (Kd) values followed the order: Kd (Np4+)>>Kd (Pu3+)~Kd(UO22+) in 1-6 M HNO3
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Source
Ansari, Seraj A.; Sodaye, Suparna; Mohapatra, P.K. (Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai (India)) (eds.); Kumar, Ashok (ed.) (Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai (India)); Tomar, B.S.; Pujari, P.K. (Radiochemistry and Isotope Group, Bhabha Atomic Research Centre, Mumbai (India)) (eds.); Birla Institute of Technology and Science - Pilani, Goa (India); 289 p; 2018; p. 160; SESTEC-2018: 8. biennial symposium on emerging trends in separation science and technology; Goa (India); 23-26 May 2018; 1 ref., 1 fig., 1 tab.
Record Type
Book
Literature Type
Conference
Country of publication
ACTINIDE NUCLEI, ACTINIDES, ALPHA DECAY RADIOISOTOPES, CHROMATOGRAPHY, ELEMENTS, HEAVY NUCLEI, HYDROGEN COMPOUNDS, INORGANIC ACIDS, INORGANIC COMPOUNDS, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, MATERIALS, METALS, NANOSECONDS LIVING RADIOISOTOPES, NEPTUNIUM ISOTOPES, NITROGEN COMPOUNDS, NUCLEI, ODD-EVEN NUCLEI, OXYGEN COMPOUNDS, RADIOACTIVE MATERIALS, RADIOACTIVE WASTES, RADIOISOTOPES, SEPARATION PROCESSES, SPONTANEOUS FISSION RADIOISOTOPES, TRANSURANIUM ELEMENTS, WASTES, YEARS LIVING RADIOISOTOPES
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