Naslov
226Ra u procjednim vodama oko odlagališta fosfogipsa
(226Ra in trickling waters from the vicinity of a phosphogypsum deposition site)

Autori
Bituh, Tomislav ; Marović Gordana

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

Izvornik
Zbornik radova 10. simpozija HRVATSKOG DRUŠTVA ZA ZAŠTITU OD ZRAČENJA / Petrinec, Branko ; Bituh, Tomislav ; Milić, Mirta ; Kopjar, Nevenka - Zagreb : Hrvatsko društvo za zaštitu od zračenja, 2015, 258-262

Skup
10. simpozij HRVATSKOG DRUŠTVA ZA ZAŠTITU OD ZRAČENJA

Mjesto i datum
Šibenik, Hrvatska, 15.04.2015. - 17.04.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
226Ra; fosfogips; voda; radioaktivnost; NORM
(226Ra; phosphogypsum; water; radioactivity; NORM)

Sažetak
Phosphate rock is a raw material used during the production of phosphate fertilizers. As a waste by-product, phosphogypsum is characterized by technically enhanced natural radioactivity (NORM). During the production of phosphate fertilizers, most of the natural 238 U from the phosphate ore ends up in the final products, while 80 % of 226 Ra is incorporated into phosphogypsum (CaSO 4 · 2H 2 O). The phosphogypsum from one Croatian phosphate fertilizer factory is deposited at a local site situated at the borderline of Lonjsko Polje Nature Park, which implies that the constant monitoring of the deposition site environment is necessary. In this investigation, the activity concentration of 226 Ra in trickling water samples from the surroundings of the mentioned deposition site was measured. The samples were collected by piezometers and after radiochemical separation of 226 Ra measured with an alpha spectrometer. Activity concentrations of 226 Ra in trickling water were within the range from 8 ± 4 Bq/m 3 to 34 ± 9 Bq/m 3 so we can conclude that layers of clay underneath the pile serve as good isolation. In addition, long-term systematic investigations showed a significant decrease in 226 Ra activity concentrations in the trickling water. However, constant monitoring is necessary to detect possible future changes in the radioactivity levels in the environment.

Izvorni jezik
Engleski

Znanstvena područja
Javno zdravstvo i zdravstvena zaštita

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