Zunic, Zora S. and Benedik, Ljudmila and Sahoo, Sarata Kumar and Kritsananuwat, Rawiwan and Veselinovic, Nenad and Stojanovska, Zdenka and Tokonami, Shinji (2018) Distribution of uranium in urine, hair and nails in residents of Niska Banja town, a high natural background radiation area. In: 9th International Conference on High Level Environmental Radiation Areas - For Understanding Chronic Low-Dose-Rate Radiation Exposure Health Effects and Social Impacts, 24-27 Sept 2018, Hirosaki University, Aomori, Japan. (Unpublished)
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Abstract
Quantification of uranium in human urine is a valuable technique for assessing occupant and public exposure to uranium. Human hair and nails can be considered as bio-indicators of the public exposure to certain natural radionuclides and other toxic metals over a long period of months or even years.All urine, hair and nail samples were collected from a population of both sex aged from 40 to 87 years in Niška Banja (227 km south of Belgrade) with a high level of natural radioactivity (HLNRA), a suburban municipality, of Serbia which located in the quaternary alluvium of River Nišava along the contact of the Koritnik limestone and travertine rock. Air dose rate in indoor environment has been measured. To assess and monitor the public exposure, urine, hair and nail samples were collected to analyze the concentration of uranium, using inductively coupled plasma mass spectrometry and alpha-particle spectrometry. Uranium was determined in 24 h samples. After addition of radioactive tracer U-232 and concentrated nitric acid, samples were evaporated to dryness. Residues were wet ashed with nitric acid and H2O2, radiochemical separation of uranium radioisotopes were performed by extraction chromatography using UTEVA resin.Source preparation for alpha-particle spectrometry was carried out by the micro-coprecipitation method with neodymium fluoride.U concentrations in hair, nail and urine varied from 0.2 to 77.1 ppb, 2.5 to 44.7 ppb, 54-730 ppb respectively.There was a large variation and may be due to geological origin and anthropogenic activities.
| Item Type: | Conference or Workshop Item (Poster) |
|---|---|
| Subjects: | Natural sciences > Physical sciences |
| Divisions: | Faculty of Medical Science |
| Depositing User: | Zdenka Stojanovska |
| Date Deposited: | 08 Oct 2018 12:47 |
| Last Modified: | 08 Oct 2018 12:47 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/20484 |
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