EFFECTIVE DOSE TO THE PUBLIC FROM 226Ra IN DRINKING WATER SUPPLIES OF IRAN
| Autor: | Hafezi S, Bolourchi M, Beitollahi Mm, Mehdi Sohrabi, Asefi M |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Adult
Water Pollutants Radioactive medicine.medical_specialty Epidemiology Health Toxicology and Mutagenesis Population Water Pollution Radioactive chemistry.chemical_element Iran Radiation Dosage Effective dose (radiation) Radium Water Supply Environmental health medicine Humans Radiology Nuclear Medicine and imaging Child Water pollution education Natural radioactivity Human food education.field_of_study Isotopes of radium Public health Infant Newborn Environmental Exposure chemistry Environmental science Environmental Monitoring |
| Zdroj: | Health Physics. 77:150-153 |
| ISSN: | 0017-9078 |
| DOI: | 10.1097/00004032-199908000-00004 |
| Popis: | One of the most important and prevalent isotopes of radium (Ra) in the human food chain, and especially in drinking water, is 226Ra. To determine the contribution of this radionuclide to the annual effective dose to the public in Iran, a national program for determination of this radionuclide was established. Over 500 water samples from different surface and ground water supplies including wells, rivers and springs, as well as hot springs and sea water from the Caspian Sea and Persian Gulf have been analyzed. An emanation method with a minimum detection limit of less than 2 mBq L(-1) was developed and applied in this study. Unweighted mean concentrations of 3.3 mBq L(-1) and 8.0 mBq L(-1) were determined in surface and ground drinking water supplies, respectively. Based on such values, mean unweighted annual intakes of 226Ra were found to be 0.85 Bq for an infant, 1.97 Bq for a child, and 2.82 Bq for an adult, which correspond to mean unweighted annual effective doses of 0.17 microSv y(-1), 0.39 microSv y(-1), and 0.56 microSv y(-1), respectively. The mean 226Ra concentrations in hot springs were higher with a maximum of 146.5 Bq L(-1) measured in the Ab-e-Siah hot spring in Ramsar, a town on the coast of the Caspian Sea in Iran. |
| Databáze: | OpenAIRE |
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