Radon removal from water supplies by diffused bubble aeration system

  • A. I. Alabdula'aly
  • H. B. Maghrawy


The removal efficiency of moderate levels of radon from groundwater supplies was evaluated using the diffused bubble aeration technique. An aeration system was designed, constructed and operated for that purpose. The effect of air-to-water ratio and detention time on radon removal were evaluated through 32 runs. The possibility to reduce the radon activity in the influent stream to the U.S. Environmental Protection Agency proposed maximum contaminant level (MCL) was verified through many alternative combined values of both air-to-water ratios and detention times. The results showed that at detention time of 19 minutes and air-to-water ratio of 12, the average radon removal is about 97%. The stripping constant characterizing this system was calculated and the removal efficiency at extended values of detention time was predicted. The data obtained are site specific, being dependent on container size, type of diffusers, temperature, and influent radon radioactivity.


Water Supply Environmental Protection Radon Removal Efficiency Aeration 
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  1. 1.
    C. Cothern, J. Smith (Eds), Environmental Radon, Plenum Publishing Corporations, New York, N. Y. 1987.Google Scholar
  2. 2.
    B. Graves (Ed.), Radon in Ground Water, Lewis Publishers, Chelsea, MI, 1989.Google Scholar
  3. 3.
    C. Cothern, P. Rebers (Eds), Radon, Radium and Uranium in Drinking Water, Lewis Publishers, Chelsea, MI, 1990.Google Scholar
  4. 4.
    D. L. Duncan, T.F. Gesell, R. H. Johnson, Radon-222 in Potable Water, Proc. 10th Midyear Topical Symp. on Natural Radioactivity in Man's Environmental, Health Physics Soc., Saratoga Springs, N. Y., Oct. 1976.Google Scholar
  5. 5.
    C. T. Hess, Health Phys., 48 (1985) 553.Google Scholar
  6. 6.
    J. P. Longtin, J. AWWA, 80 (1988) No. 7, 84.Google Scholar
  7. 7.
    M. Asikainen, H. Kahlos, Geochim. Cosmochim. Acta, 43 (1979) 1681.CrossRefGoogle Scholar
  8. 8.
    J. D. Lowry, E. Moreau, Removal of Extreme Radon and Uranium from a Water Supply, Proc. 1986 ASCE Natl. Conf. on Environmental Engineering, Cincinnati, Ohio, July 1986.Google Scholar
  9. 9.
    US Environmental Protection Agency, National Primary Drinking Water Regulations; Radionuclides. 40 CFR Parts 141, 142. Federal Register, 56: 138: 33050, July 18, 1991.Google Scholar
  10. 10.
    US Environmental Protection Agency, Technologies and Costs for the Treatment and Disposal of Waste By-Products from Water Treatments for the Removal of Inorganic and Radioactive Contaminants, Revised Draft Rept. to Office, of Drinking Water, USEPA, Washington, D.C., Prepared by Malcolm Pirnie Inc., 1986.Google Scholar
  11. 11.
    US Environmental Protection Agency, Aeration Alternatives for Radon Reduction: Addendum to Technology and Costs for the Removal of Radon from Potable Water Supplies, Draft Prepared by Malcolm Pirnie Inc., 1988.Google Scholar
  12. 12.
    N. E. Kinner, J. P. Malley, J. A. Clement, P. A. Quern, G. S. Schell, Radon Removal Techniques for Small Community Public Water Supplies, USEPA/600/2-90/036, August 1990.Google Scholar
  13. 13.
    K. L. Dixon, R. G. Lee, J. Smith, P. Zielinski, J. AWWA, 83 (1991) No. 4, 141.Google Scholar
  14. 14.
    J. D. Lowry, J. E. Brandow, Removal of Radon from Groundwater Supplies Using Granular Activated Carbon or Diffused Aeration, Water Resources Research Center, University of Maine, July 1981.Google Scholar
  15. 15.
    R. C. Hoather, R. F. Rackham, Some Observations on Radon in Waters and Its Removal by Aeration, Proc. Inst. of Civil Engr., London, 1962.Google Scholar
  16. 16.
    N. E. Kinner, P. A. Quern, G. S. Schell, C. E. Lessard, J. A. Clement, Treatment Technology for Removing Radon from Small Community Water Supplies, in; Radon, Radium and Uranium in Drinking Water,C. R. Cothern andP. A. Rebers (Eds.), Lewis Publishers, Chelsea, MI, 1990, p. 39.Google Scholar
  17. 17.
    H. M. Prichard, T. F. Gesell, Health Phys., 33 (1977) 577.Google Scholar
  18. 18.
    H. M. Prichard, E. A. Venso, C. L. Dodson, Radioact. Radiochem. 3 (1992) No. 1, 28.Google Scholar
  19. 19.
    J. D. Lowry, W. F. Brutsaert, T. Mcenerney, C. Molk, J. AWWA, 79 (1987) No. 4, 162.Google Scholar

Copyright information

© Akadémiai Kiadó 1999

Authors and Affiliations

  • A. I. Alabdula'aly
    • 1
  • H. B. Maghrawy
    • 1
  1. 1.King Abdulaziz City for Science and TechnologyRiyadhSaudi Arabia

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