Environmental Geochemistry and Health

, Volume 33, Issue 4, pp 389–397 | Cite as

Does iodine gas released from seaweed contribute to dietary iodine intake?

  • P. P. A. Smyth
  • R. Burns
  • R. J. Huang
  • T. Hoffman
  • K. Mullan
  • U. Graham
  • K. Seitz
  • U. Platt
  • C. O’Dowd
Original paper

Abstract

Thyroid hormone levels sufficient for brain development and normal metabolism require a minimal supply of iodine, mainly dietary. Living near the sea may confer advantages for iodine intake. Iodine (I2) gas released from seaweeds may, through respiration, supply a significant fraction of daily iodine requirements. Gaseous iodine released over seaweed beds was measured by a new gas chromatography–mass spectrometry (GC–MS)-based method and iodine intake assessed by measuring urinary iodine (UI) excretion. Urine samples were obtained from female schoolchildren living in coastal seaweed rich and low seaweed abundance and inland areas of Ireland. Median I2 ranged 154–905 pg/L (daytime downwind), with higher values (~1,287 pg/L) on still nights, 1,145–3,132 pg/L (over seaweed). A rough estimate of daily gaseous iodine intake in coastal areas, based upon an arbitrary respiration of 10,000L, ranged from 1 to 20 μg/day. Despite this relatively low potential I2 intake, UI in populations living near a seaweed hotspot were much higher than in lower abundance seaweed coastal or inland areas (158, 71 and 58 μg/L, respectively). Higher values >150 μg/L were observed in 45.6% of (seaweed rich), 3.6% (lower seaweed), 2.3% (inland)) supporting the hypothesis that iodine intake in coastal regions may be dependent on seaweed abundance rather than proximity to the sea. The findings do not exclude the possibility of a significant role for iodine inhalation in influencing iodine status. Despite lacking iodized salt, coastal communities in seaweed-rich areas can maintain an adequate iodine supply. This observation brings new meaning to the expression “Sea air is good for you!”

Keywords

Atmospheric gaseous iodine Thyroid Urinary iodine Seaweed Iodine 

References

  1. Bateson, T. F., & Schwartz, J. (2008). Children’s response to air pollutants. Journal of Toxicology and Environmental Health, Part A, 71, 238–243.CrossRefGoogle Scholar
  2. Caldwell, K. C., Makhmudov, A., Jones, R. L., & Hollowell, J. G. (2005). EQUIP: A worldwide program to ensure the quality of urinary iodine procedures. Accreditation and Quality Assurance, 10, 356–361.CrossRefGoogle Scholar
  3. California Environmental Protection Agency. (1994). Research Note 94-11: How much air do we breathe? http://www.arb.ca.gov/research/resnotes/notes/94-11.htm.
  4. Finley, B. D., & Saltzman, E. S. (2008). Observations of Cl2, Br2 and I2 in coastal marine air. Geophysical Research Letters, 113, D21301.CrossRefGoogle Scholar
  5. Fuge, R. (1996). Geochemistry of iodine in relation to iodine deficiency diseases. In J. D. Appleton, R. Fuge, & G. J. H. McCall (Eds.), Environmental geochemistry and health (Vol. 113, pp. 201–211). London: Geological Society Special Publication.Google Scholar
  6. Fuge, R., & Johnson, C. C. (1986). The geochemistry of iodine—a review. Environmental Geochemistry and Health, 8, 31–54.CrossRefGoogle Scholar
  7. Harun-Or-Rashid, M., Asai, M., Sun, X. Y., Hayashi, Y., Sakamoto, J., & Murata, Y. (2010). Effect of thyroid statuses on sodium/iodide symporter (NIS) gene expression in the extrathyroidal tissues in mice. Thyroid Research, 3, 3.CrossRefGoogle Scholar
  8. Harvey, R. P. (2009). Uncertainty of iodine particulate deposition in the respiratory tract. In V. R. Preedy, G. G. Burrow, & R. Watson (Eds.), Comprehensive handbook of iodine: Nutritional, biochemical and therapeutic aspects (pp. 259–273). Academic Press: London.Google Scholar
  9. Harvey, R. P., Hamby, D. M., & Palmer, T. S. (2006). Uncertainty of the thyroid dose conversion factor for inhalation intakes of 131I and its parametric uncertainty. Radiation Protection Dosimetry, 118, 296–306.CrossRefGoogle Scholar
  10. Hession, C., Guiry, M. D., McGarvey, S., & Joyce, J. (1998). Mapping and assessment of the seaweed resources (Ascophyllum nodosum Laminaria spp.) off the west coast of Ireland. Marine Resource Series, 5, 1–89.Google Scholar
  11. Huang, R. J., & Hoffmann, T. (2009). Development of a coupled diffusion denuder system combined with gas chromatography/mass spectrometry for the separation and quantification of molecular iodine and the activated iodine compounds iodine monochloride and hypoiodous acid in the marine atmosphere. Analytical Chemistry, 81(5), 1777–1783.CrossRefGoogle Scholar
  12. Huang, R. J., Hou, X. L., & Hoffmann, T. (2010a). Extensive evaluation of a diffusion denuder technique for the quantification of atmospheric stable and radioactive molecular iodine. Environmental Science and Technology, 44(13), 5061–5066.CrossRefGoogle Scholar
  13. Huang, R. J., Seitz, K., Buxmann, J., Pöhler, D., Hornsby, K. E., Carpenter, L. J., et al. (2010b). In situ measurements of molecular iodine in the marine boundary layer: The link to macroalgae and the implications for O3, IO, OIO and NOx. Atmospheric Chemistry and Physics, 10, 4823–4833.CrossRefGoogle Scholar
  14. Johnson, C. C. (2003). The geochemistry of iodine and its application to environmental strategies for reducing the risks from iodine deficiency disorders (IDD). British Geological SurveyCommissioned Report, CR/03/057N.Google Scholar
  15. Küpper, F. C., Carpenter, L. J., McFiggans, G. B., Palmer, C. J., Waite, T. J., Boneberg, E. M., et al. (2008). Iodide accumulation provides kelp with an inorganic antioxidant impacting atmospheric chemistry. Proceedings of the National Academy of Sciences of the United States of America, 105, 6954–6958.CrossRefGoogle Scholar
  16. Lazarus, J. H., & Smyth, P. P. (2008). Iodine deficiency in the UK and Ireland. Lancet, 372(9642), 888.CrossRefGoogle Scholar
  17. Limbert, E., Prazeres, S., São Pedro, M., Madureira, D., Miranda, A., Ribeiro, M., Jacome de Castro, J., Carrilho, F., Oliveira, M. J., Reguengo, H., & Borges, F. Thyroid Study Group of the Portuguese Endocrine Society. (2010). Iodine intake in Portuguese pregnant women: results of a countrywide study. European Journal of Endocrinology, 163, 631–635.Google Scholar
  18. McFiggans, G., Coe, H., Burgess, R., Allan, J., Cubison, M., Alfarra, M. R., et al. (2004). Direct evidence for coastal iodine particles from Laminaria macroalgae–linkage to emissions of molecular iodine, Atmos. Chemical Physics, 4, 701–713.Google Scholar
  19. Morgan, A., Morgan, D. J., & Black, A. (1968). As study on the deposition, translocation and excretion of radioiodine inhaled as iodine vapour. Health Physics, 15, 313–322.CrossRefGoogle Scholar
  20. Nagataki, S. (2008). The average of dietary iodine intake due to the ingestion of seaweeds is 1.2 mg/day in Japan. Thyroid, 18, 667–668.CrossRefGoogle Scholar
  21. Nawoor, Z., Burns, R., Smith, D. F., Sheehan, S., O’Herlihy, C., & Smyth, P. P. (2006). Iodine intake in pregnancy in Ireland—a cause for concern? Irish Journal of Medical Science, 175, 21–24.CrossRefGoogle Scholar
  22. O’Dowd, C. D., & Hoffmann, T. (2005). Coastal new particle formation: A review of the current state-of-the-art. Environmental Chemistry, 2, 245–255.CrossRefGoogle Scholar
  23. Ohashi, T., Yamaki, M., Pandav, C. S., Karmarkar, M. G., & Irie, M. (2000). Simple microplate method for determination of urinary iodine. Clinical Chemistry, 46, 529–536.Google Scholar
  24. Peters, C., Pechtl, S., Stutz, J., Hebestreit, K., H¨onninger, G., Heumann, K. G., et al. (2005). Reactive and organic halogen species in three different European coastal environments. Atmospheric Chemistry and Physics, 5, 3357–3375.CrossRefGoogle Scholar
  25. Pirjola, L., O’Dowd, C. D., Yoon, Y. J., & Sellegri, K. (2005). Modelling iodine particle formation and growth from seaweed in a chamber. Enivronmental Chemistry, 2, 271–281.CrossRefGoogle Scholar
  26. Saiz-Lopez, A., & Plane, J. M. C. (2004). Novel iodine chemistry in the marine boundary layer. Geophysics Research Letters, 31, L04112.CrossRefGoogle Scholar
  27. Saiz-Lopez, A., Plane, J. M. C., McFiggans, G., Williams, P. I., Ball, S. M., Bitter, M., et al. (2006). Modelling molecular iodine emissions in a coastal marine environment: The link to new particle formation. Atmospheric Chemistry and Physics, 6, 883–895.CrossRefGoogle Scholar
  28. Seitz, K., Buxmann, J., Pöhler, D., Sommer, T., Tschritter, J., Neary, T., et al. (2010). The spatial distribution of the reactive iodine species IO from simultaneous active and passive DOAS observations. Atmospheric Chemistry and Physics, 10, 2117–2128.CrossRefGoogle Scholar
  29. Sellegri, K., Yoon, Y. J., Jennings, S. G., O’Dowd, C. D., Pirjola, L., Cautenet, S., et al. (2005). Quantification of coastal new ultra-fine particles formation from in situ andchamber measurements during the BIOFLUX campaign. Environmental Chemistry, 2, 260–270.CrossRefGoogle Scholar
  30. Smyth, D. & Johnson, C. C. (2010). Distribution of iodine in soils of Northern Ireland. Geochemistry Exploration Environment Analysis. (In press).Google Scholar
  31. Spitzweg, C., Joba, W., Eisenmenger, W., & Heufelder, A. E. (1998). Analysis of human sodium iodide symporter gene expression in extrathyroidal tissues and cloning of its complementary deoxyribonucleic acids from salivary gland, mammary gland, and gastric mucosa. Journal of Clinical Endocrinology and Metabolism, 83, 1746–1751.CrossRefGoogle Scholar
  32. Vought, R. L., London, W. T., & Brown, F. A. (1964). A note on atmospheric iodine and its absorption in man. Journal of Clinical Endocrinology and Metabolism, 24, 414–416.CrossRefGoogle Scholar
  33. Vought, R. L., Brown, F. A., & London, W. T. (1970). Iodine in the environment. Archives of Environmental Health, 20, 516–522.Google Scholar
  34. Whitehead, D. C. (1984). The distribution and transformation of iodine in the environment. Environment International, 10, 321–339.CrossRefGoogle Scholar
  35. WHO. (2007). Assessment of iodine deficiency disorders and monitoring their elimination (3rd ed.). Geneva: WHO, UNICEF, ICCIDD.Google Scholar
  36. Zimmermann, M. B. (2009). Iodine deficiency. Endocrine Reviews, 30, 376–408.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • P. P. A. Smyth
    • 1
    • 2
  • R. Burns
    • 2
  • R. J. Huang
    • 3
  • T. Hoffman
    • 3
  • K. Mullan
    • 4
  • U. Graham
    • 4
  • K. Seitz
    • 5
  • U. Platt
    • 5
  • C. O’Dowd
    • 1
  1. 1.School of Physics and Environmental Change Institute, National University of IrelandGalwayIreland
  2. 2.UCD School of Medicine and Medical Science, University College DublinDublinIreland
  3. 3.Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University of MainzMainzGermany
  4. 4.Royal Victoria HospitalBelfastN. Ireland
  5. 5.Institute of Environmental Physics, University of HeidelbergHeidelbergGermany

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