Journal of Fluorescence

, Volume 21, Issue 1, pp 119–124 | Cite as

Uranyl Soil Extraction and Fluorescence Enhancement by Nanoporous Silica Gel: pH effects

  • Chien-Cheng Chen
  • Dmitry Pestov
  • Jean D. Nelson
  • John E. Anderson
  • Gary Tepper
Original Paper


Nanoporous silica gel was employed to extract uranyl from contaminated soil and to enhance the fluorescence intensity and lifetime. The fluorescence lifetime and intensity of uranyl ions absorbed within nanoporous silica gel was measured from pH 1–13. The results show that the uranyl fluorescence intensity can be enhanced by approximately two orders of magnitude by the silica nanoporous matrix from pH 4–12 with the greatest enhancement occurring from pH 4–7. The enhanced fluorescence lifetime can be used in time-gated measurements to help minimize the influence of background environmental fluorophores.


Uranium pH effect Micro porous silica Fluorescence Soil 



This work was supported by the US Department of Energy under contract number DE-FG52-06NA27491.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Chien-Cheng Chen
    • 1
  • Dmitry Pestov
    • 1
  • Jean D. Nelson
    • 2
  • John E. Anderson
    • 2
  • Gary Tepper
    • 1
  1. 1.Department of Mechanical EngineeringVirginia Commonwealth UniversityRichmondUSA
  2. 2.US Army Engineer Research and Development CenterTopographic Engineering CenterAlexandriaUSA

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