A continuous monitor for assessment of 222Rn in the coastal ocean

  • W. C. Burnett
  • G. Kim
  • D. Lane-Smith
Article

Abstract

Radon-222 is a good natural tracer of groundwater flow into the coastalocean. Unfortunately, its usefulness is limited by the time consuming natureof collecting individual samples and traditional analysis schemes. We demonstratehere an automated system which can determine, on a “continuous”basis, the radon activity in coastal ocean waters. The system analyses 222Rn from a constant stream of water passing through an air-water exchangerthat distributes radon from the running flow of water to a closed air loop.The air stream is feed to a commercial radon-in-air monitor which determinesthe concentration of 222Rn by collection and measurement of theemitting daughters, 214Po and 218Po, via a charged semiconductordetector. Since the distribution of radon at equilibrium between the air andwater phases is governed by a well-known temperature dependence, the radonconcentration in the water is easily calculated.

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References

  1. 1.
    J. M. Edmond, C. Measures, R. E. Mcduff, L. H. Chan, R. Collier, B. Grant, L. I. Gordon, J. B. Corliss, Earth Planet. Sci. Lett., 46 (1979) 1.CrossRefGoogle Scholar
  2. 2.
    K. L. Von Damm, Annu. Rev. Earth Planet. Sci., 18 (1990) 173.CrossRefGoogle Scholar
  3. 3.
    K. L. Von Damm, J. M. Edmond, B. Grant, C. I. Measures, B. Walden, R. F. Weiss, Geochim. Cosmochim. Acta, 49 (1985) 2197.CrossRefGoogle Scholar
  4. 4.
    W. C. Burnett, J. E. Cable, D. R. Corbett, J. Chanton, 1996. Proc. Intern. Symp. on Groundwater Discharges to the Coastal Zone, R. Buddemeier (Ed.), LOICZ/R&S/96–8, LOICZ, Texel, The Netherlands, iv+179 p.Google Scholar
  5. 5.
    J. E. Cable, G. Bugna, W. C. Burnett, J. Chanton, Limnol. Oceanog., 41 (1996) 1347.CrossRefGoogle Scholar
  6. 6.
    D. R. Corbett, J. Chanton, W. Burnett, K. Dillon, C. Rutkowski, J. Fourqurean, Limnol. Oceanogr., 44 (1999) 1045.CrossRefGoogle Scholar
  7. 7.
    J. E. Cable, W. C. Burnett, J. P. Chanton, G. Weatherly, Earth Planet. Sci. Lett., 144 (1996) 591.CrossRefGoogle Scholar
  8. 8.
    N. Hussain, T. M. Church, G. Kim, Mar. Chem., 65 (1999) 127.CrossRefGoogle Scholar
  9. 9.
    D. R. Corbett, K. Dillon, W. Burnett, J. Chanton, Limnol. Oceanogr., (2000) submitted.Google Scholar
  10. 10.
    K. A. Fanning, R. H. Byrne, J. A. Breland II, P. R. Betzer, W. S. Moore, R. J. Elsinger, T. E. Pyle, Earth Planet. Sci. Lett., 52 (1981) 345.CrossRefGoogle Scholar
  11. 11.
    W. S. Broecker, J. Cromwell, Y.-H. Li, Earth Planet. Sci. Lett., 5 (1968) 101.CrossRefGoogle Scholar
  12. 12.
    G. G. Mathieu, P. E. Biscaye, R. A. Lupton, D. E. Hammond, Health Phys., 55 (1988) 989.Google Scholar
  13. 13.
    S. Tasaka, Y. Sasaki, H. Okazawa, M. Nakagawa, Radioisotopes, 43 (1994) 126 (in Japanese).CrossRefGoogle Scholar
  14. 14.
    F. Weigel, Chemiker Zeitung, 102 (1978) 287.Google Scholar
  15. 15.
    A. J. Howard, W. P. Strange, Nucl. Instr. Meth., A311 (1992) 378.Google Scholar
  16. 16.
    D. Lane-Smith, S. Shefsky, Proc. American Association of Radon Scientists and Technologists, Las Vegas, Nevada, November 7–10, 1999.Google Scholar
  17. 17.
    D. R. Lee, Limnol. Oceanogr., 22 (1977) 140.CrossRefGoogle Scholar
  18. 18.
    M. Taniguchi, Y. Fukuo, Ground Water, 31 (1993) 675.CrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers/Akadémiai Kiadó 2001

Authors and Affiliations

  • W. C. Burnett
    • 1
  • G. Kim
    • 1
  • D. Lane-Smith
    • 2
  1. 1.Environmental Radioactivity Measurement FacilityUSA
  2. 2.DURRIDGE CompanyBedfordUSA

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