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Redox behaviors of Fe(II/III) and U(IV/VI) studied in synthetic water and KURT groundwater by potentiometry and spectroscopy

  • Jun-Yeop Lee
  • Jae Yong Oh
  • Kirana Yuniati Putri
  • Min Hoon Baik
  • Jong-Il YunEmail author
Article

Abstract

The redox behaviors of Fe(II/III) and U(IV/VI) in both synthetic samples and natural groundwater were investigated with potentiometry, UV/VIS absorption spectroscopy, and time-resolved laser fluorescence spectroscopy. Total dissolved Fe(II/III) concentration along with presence of mixed redox couples of Fe2+/Fe3+ and Fe2+/Fe2O3(s) were revealed to be the major factors influencing on the redox potentials. Considerable discrepancies between redox potentials obtained with quantitative analysis and chemical speciation of Fe(II/III) and U(IV/VI) ions were identified in the KAERI Underground Research Tunnel groundwater. Chemical speciation of U(IV) in natural groundwater without considering relevant complexation reaction might cause relatively large uncertainties in redox potential calculations.

Keywords

Redox Iron Uranium Natural groundwater 

Notes

Acknowledgements

This work was supported by the Nuclear Safety Research Program (1305032-0315-CG100) through the Korea Foundation of Nuclear Safety (KOFONS), granted financial resource from the Nuclear Safety and Security Commission (NSSC), Republic of Korea.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2017

Authors and Affiliations

  • Jun-Yeop Lee
    • 1
    • 2
  • Jae Yong Oh
    • 1
    • 3
  • Kirana Yuniati Putri
    • 1
    • 4
  • Min Hoon Baik
    • 5
  • Jong-Il Yun
    • 1
    Email author
  1. 1.Department of Nuclear and Quantum EngineeringKAISTDaejeonRepublic of Korea
  2. 2.Institute for Nuclear Waste DisposalKarlsruhe Institute of TechnologyKarlsruheGermany
  3. 3.Central Research Institute, Korea Hydro & Nuclear Power Co., Ltd.DaejeonRepublic of Korea
  4. 4.Research Center for Physics, Indonesian Institute of SciencesKomplek PUSPIPTEKTangerang SelatanIndonesia
  5. 5.Radioactive Waste Disposal Research DivisionKAERIDaejeonRepublic of Korea

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