Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine · 1998
Seasonal variations of 226Ra and 222Rn in mineral spring waters of Aguas de Prata, Brazil.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
de Oliveira J, Mazzilli B, Sampa M H, Silva B
Аннотация
In this paper the activity concentrations of 226Ra and 222Rn were assayed in the mineral spring waters of Aguas da Prata in order to evaluate the seasonal variations of such radionuclides. The results obtained were related to the chemical composition of the water as well as to the lithology of the aquifer and temperature. Higher activity concentrations up to 1.8 x 10(3) mBq L-1 for 226Ra and 1.2 x 10(2) Bq L-1 for 222Rn have been observed in waters with low levels of soluble salts. Waters which present high levels of carbonate and sulphate salts showed maximum values of 2.5 x 10(2) mBq L-1 for 226Ra and 2.7 x 10(1) Bq L-1 for 222Rn. This behaviour is mainly due to the physico-chemical properties of these radionuclides in water as well as to the lithologic structure of the aquifers.