Naslov
WATER INTAKE AND AGE-DEPENDENT DOSE ASSESMENT

Autori
Bronzović, Maja ; Marović, Gordana

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
IRPA 11 Full papers 11th International Congress of the International Radiation Protection Association / - Madrid : International Radiation Protection Association (IRPA), 2004, 1-4

Skup
11th International Congress of the International Radiation Protection Association

Mjesto i datum
Madrid, Španjolska, 23.05.2004. - 28.05.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
radium; water; effective dose; age-dependent dose assessment

Sažetak
The metabolic reactions in human organism together with the need for specific essential nutrients change with age. Water, as an essential nutrient, consists of numerous elements which are less or more desirable for human survival. In our study daily water intake for different age groups was assessed according to the Water Institute data and the average body weight from Family Practise Notebook website. The contribution of drinking water radioactivity to the total exposure is very small, at about 5% of all naturally radioactive sources, but it is very important quality factor due to the hazardous effects on human health. 226Ra is naturally present in water and contributes significantly to the ingestion dose by water consumption. Radium is calcium homologue so its deposition occurs mostly in the period of intesive growth. The specific activity of 226Ra in all samples, both tap and bottled water, was determined by alpha spectrometric measurement after radiochemical separation. The research results range from 0.53 mBq/L to 50.04 mBq/L which does not exceed the 226Ra maximum activity concentration recommended by the World Health Organisation. The annual effective doses for different age groups were assessed and range from 0.11 µ Sv to 85.84 µ Sv. The most exposed age groups are infants and children at the age of 13 to 17. Infants and young adolescents have very high amount of determined sexual hormones which could explain high body sensitivity of these age groups to the radioactive bone-seeking 226Ra.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija, Javno zdravstvo i zdravstvena zaštita

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