Fluoride Action Network

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Abstract

Sri Lanka provides an ideal opportunity for the study of the effect of geology on human health. The vast majority of the people of Sri Lanka still live in rural areas within areas termed geochemical provinces. Very broadly, one could say that a geochemical province has characteristic chemical composition in soil, water stream sediments and rocks, enabling their delineation from others. The chemical composition is presumed to be have an impact on the health of the inhabitants of the particular geochemical province, particularly because of the fact that their food and water are obtained mostly from the terrain itself. This leads to the concept of “diseases of geochemical origin”. Among these are dental fluorosis, iodine deficiency disorders (IDDs) and selenium-based diseases. The Dry Zone of Sri Lanka has several areas rich in groundwater fluoride, the ingestion of which leads to dental fluorosis. Iodine deficiency diseases are more common in the Wet Zone, though their aetiologies are more complicated. Interestingly, it has also been observed that significant proportions of the female population of Sri Lanka are selenium-deficient, which could well be related to the geological environment. Chronic renal failure (CRF) has been observed in some areas of the Dry Zone of Sri Lanka, where there is a relationship of CRF with the mineral content of drinking water. This subject matter falls under the auspices of Medical Geology, a scientific discipline still in its infancy, and much more concerted studies are needed to attract the attention of medical research.

*Original abstract online at https://link.springer.com/article/10.1007/s10653-006-9070-0

 

References

  1. Bhattacharya, P., Chatterjee, D., & Jacks, G. (1997). Occurrence of arsenic contaminated groundwater in alluvial aquifers from Delta Plains, Eastern India: options for safe drinking water supply. Water Resources Development, 13(1), 79–92.

    Article  Google Scholar

  2. Christensen, H., & Dharmagunawardhane, H. A. (1986). Hydrogeological investigations in hardrock terrains of Sri Lanka with special emphasis on Matale and Polonnaruwa District. In Proceedings of the seminar on groundwater and water quality in Sri Lanka. Kandy: Institute of Fundamental Studies.

  3. Dissanayake, C. B. (1991). The fluoride problem in the groundwater of Sri Lanka—environmental management and health. International Journal of the Environmental Studies, 38, 137–156.

    Google Scholar

  4. Dissanayake, C. B., & Chandrajith, R. L. R. (1996). Iodine in the environment and endemic goitre in Sri Lanka. In J. D. Appleton, R. Fuge, & G. J. H. McCall (Eds.), Environmental Geochemistry and Health (pp. 213–221). Geological Society Special Publication, U.K. No. 113.

  5. Dissanayake, C. B., Chandrajith, R., & Tobschall, H. J. (1998). The iodine cycle in the tropical environment—implications on iodine deficiency disorders. International Journal of the Environmental Studies, 56, 357–372.

    Google Scholar

  6. Dissanayake, C. B., & Weerasooriya, S. V. R. (1986). The Hydrogeochemical Atlas of Sri Lanka. Publication of the Natural Resources, Energy and Science Authority of Sri Lanka, 103 pp.

  7. Fernando, M. A., Balasuriya, S., Herath, K. B., & Katugampola, S. L. (1987). Endemic goitre in Sri Lanka” In: C. B. Dissanayake & L. Gunatilake (Eds.), Some Aspects of the Chemistry of the Environment of Sri Lanka (pp. 46–64). Colombo, Sri Lanka: Sri Lanka Association for the Advancement of Science.

  8. Fordyce, F. M., Johnson, C. C., Navaratne, U. R. B., Appleton, J. D., & Dissanayake, C. B., (1998). Studies of selenium geochemistry and distribution in relation to iodine deficiency disorders in Sri Lanka. Tech. Report. WC/98/28. Overseas Geology Series, BGS-UK.

  9. Fordyce, F. M., Johnson, C. C., Navaratne, U. R. B., Appleton, J. D., & Dissanayake, C. B. (2000). Selenium and iodine in soil, rice and drinking water in relation to endemic goitre in Sri Lanka. The Science of the Total Environment, 236, 127–141.

    Article  Google Scholar

  10. Kronberg, B. I., Fyfe, W. S., Leonardos, Jr. O. H., & Santos, A. M. (1979). The chemistry of some Brazilian soils: element mobility during intense weathering. Chemical Geology, 24, 211–229.

    Article  Google Scholar

  11. Lapegue, J., (2001). Chemical risks associated to the consumption of groundwater: The specificity of chronic renal failure in eastern areas of Sri Lanka. Technical report of Action Contre la Faim.

  12. Padmasiri, J. P., & Dissanayake, C. B. (1995). Simple defluoridater for removing excess fluorides from fluoride-rich drinking water. International Journal of Environmental Health Research, 5, 153–160.

    Article  Google Scholar

  13. Phantumvanit, P., Songpaisan, Y., & Moller, I. J. (1988). A defluoridator for individual households. World Health Forum, 9, 555–558.

    Google Scholar

  14. Ramesam, V., & Rajagopalan, K. (1985). Fluoride ingestion into the natural waters of hard-rock areas, Peninsular India. Journal of the Geological Society of India, 26, 125–132.

    Google Scholar

  15. Underwood, E. J. (1977). Trace Elements in Human and Animal Nutrition. New York: Academic Press, 533.

    Google Scholar

  16. WHO (World Health Organization) (1971). International Standards for Drinking Water. Geneva: WHO.

    Google Scholar

  17. Yang, G., & Xia, M. (1995). Studies on human dietary requirements and safe range of dietary intakes of selenium in China and their application to the prevention of related endemic diseases. Biomedical and Environmental Sciences, 8, 187–201.

    Google Scholar

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