Extraction kinetics of Uranium(VI) and Thorium(IV) with Tri-iso-amyl phosphate from nitric acid using a Lewis Cell

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• 作者：Xiao-qing Liu (1)
  Fang Kong (1)
  Jia-li Liao (1)
  Song-dong Ding (2)
  Yuan-you Yang (1)
  Huang Huang (1)
  Shun-zhong Luo (3)
  Guo-ping Liu (3)
  Xing-liang Li (3)
  Ji-jun Yang (1)
  Jun Tang (1)
  Ning Liu (1)
  
• 关键词：Uranium ; Thorium ; Extraction kinetics ; Tri ; iso ; amyl phosphate
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：302
• 期：3
• 页码：1069-1076
• 全文大小：825 KB
• 参考文献：1. Biswas S, Rupawate V, Hareendran K, Roy S (2013) Counter-current extraction and separation of U(VI) from a mixture of U(VI)–Th(IV)–Y(III) using tris-2-ethyl hexyl phosphate (TEHP). J Radioanal Nucl Chem 295(3):2243-248 CrossRef
  2. Trellue HR, Bathke CG, Sadasivan P (2011) Neutronics and material attractiveness for PWR thorium systems using monte carlo techniques. Prog Nucl Energy 53(6):698-07 CrossRef
  3. Kaygun AK, Akyil S (2007) Study of the behaviour of thorium adsorption on PAN/zeolite composite adsorbent. J Hazard Mater 147(1):357-62 CrossRef
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  5. Anantharaman K, Shivakumar V, Saha D (2008) Utilisation of thorium in reactors. J Nucl Mater 383(1):119-21 CrossRef
  6. Liu J, Wang Y, Li D (2008) Extraction kinetics of thorium(IV) with primary amine N1923 in sulfate media using a constant interfacial cell with laminar flow. Sep Sci Technol 43(2):431-45 CrossRef
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  8. Raju SK, Subramanian M (2007) Sequential separation of lanthanides, thorium and uranium using novel solid phase extraction method from high acidic nuclear wastes. J Hazard Mater 145(1):315-22 CrossRef
  9. He Q, Chang X, Wu Q, Huang X, Hu Z, Zhai Y (2007) Synthesis and applications of surface-grafted Th(IV)-imprinted polymers for selective solid-phase extraction of thorium(IV). Anal Chim Acta 605(2):192-97 CrossRef
  10. Bayyari MA, Nazal MK, Khalili FI (2010) The effect of ionic strength on the extraction of thorium(IV) from perchlorate solution by didodecylphosphoric acid (HDDPA). Arab J Chem 3(2):115-19 CrossRef
  11. Pathak P, Prabhu D, Kanekar A, Ruikar P, Bhattacharyya A, Mohapatra P, Manchanda V (2004) Distribution behavior of U(VI), Th(IV), and fission products with di (2-ethylhexyl) isobutyramide under process conditions. Ind Eng Chem Res 43(15):4369-375 CrossRef
  12. Petkovi? DM (1988) Thermodynamics of extraction equilibria. Part 7. Solvent extraction of thorium nitrate with tri-n-butyl phosphate. J Chem Soc, Dalton Trans 21(7):1813-816 CrossRef
  13. Sahoo TK, Chandran K, Muralidaran P, Ganesan V, Srinivasan T (2012) Calorimetric studies on thermal decomposition of tri isoamyl phosphate–nitric acid systems. Thermochim Acta 2012(534):9-6 CrossRef
  14. Sahoo TK, Srinivasan TG (2009) Effect of temperature on the extraction of uranium by TiAP/n-dodecane. Desalin Water Treat 12(1-):40-4 CrossRef
  15. Suresh A, Srinivasan T, Rao PV (1994) Extraction of U(VI), Pu(IV) and Th(IV) by some trialkyl phosphates. Solv Extr Ion Exchange 12(4):727-44 CrossRef
  16. Suresh A, Srinivasan T, Rao PV (2009) Parameters Influencing Third-Phase Formation in the Extraction of Th(NO₃)₄ by some Trialkyl Phosphates. Solv Extr Ion Exchange 27(2):132-58 CrossRef
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• 作者单位：Xiao-qing Liu (1)
  Fang Kong (1)
  Jia-li Liao (1)
  Song-dong Ding (2)
  Yuan-you Yang (1)
  Huang Huang (1)
  Shun-zhong Luo (3)
  Guo-ping Liu (3)
  Xing-liang Li (3)
  Ji-jun Yang (1)
  Jun Tang (1)
  Ning Liu (1)
  
  1. Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, People’s Republic of China
  2. College of Chemistry, Sichuan University, Chengdu, 610064, People’s Republic of China
  3. Institute of Nuclear Physics and Chemistry, CAEP, Mianyang, 621900, People’s Republic of China
  
• ISSN：1588-2780

文摘

The extraction kinetics of uranium(VI) and thorium(IV) with Tri-iso-amyl phosphate (TiAP) from nitric acid medium has been investigated using a Lewis Cell. Especially, dependences of the extraction rate on stirring speed, temperature, interfacial area were firstly measured to elucidate the extraction kinetics regimes. The experimental results demonstrated that extraction kinetic of U(VI) is governed by chemical reactions at interface with an activation energy, Ea, of 43.41?kJ/mol, while the rate of Th(IV) extraction is proved to be intermediate controlled, of which the Ea is 23.20?kJ/mol. Reaction orders with respect to the influencing parameters of the extraction rate are determined, and the rate equations of U(VI) and Th(IV) at 293?K have been proposed as $$ {\text{r}} = - {\text{dcUO}}_{ 2} \left( {{\text{NO}}_{ 3} } \right)_{ 2} /{\text{dt}} = 1. 80 \times 10^{ - 3} \left[ {{\text{UO}}_{ 2} \left( {{\text{NO}}_{ 3} } \right)_{ 2} } \right]^{ 1.0 1} \left[ {\text{TiAP}} \right]^{0. 5 5} , $$ $$ {\text{r}} = - {\text{dcTh }}\left( {{\text{NO}}_{ 3} } \right)_{ 4} /{\text{dt}} = 1. 8 8\times 10^{ - 3} \left[ {{\text{Th }}\left( {{\text{NO}}_{ 3} } \right)_{ 4} } \right]^{ 1.0 4} \left[ {\text{TiAP}} \right]^{ 1. 7 7} \left[ {{\text{HNO}}_{ 3} } \right]^{0. 3 8} , $$ respectively.