Radionuclides in some spring mineral waters in Serbia

Radiochemical analyses ofsome natural mineral bottled waters from different location in Serbia were investigated. Concentrations of all present naturally occurring radionuclides, 238 U, 234U, 232Th, 230Th, 228Th, 228Ra and 226Ra and 234U/238 U, 226Ra/230Th, 228Th /232Th, and 228 Ra/228 Th activity ratios were calculated and discussed. Uranium series disequilibria in the hydrosphere occur due to geochemical differentiation processes resulting with different mobility of the radionuclides from the same series. We have investigated radioactive disequilibrium in the spring waters Crni Guber, Čibutkovica and Studenica, originated from metamorphic rock area. High content of radium isotopes (226Ra, 228Ra) in analysed natural spring waters indicates contribution from other non-water sources, probably environmental sediment.Physical chemistry 2004 : 7th international conference on fundamental and applied aspects of physical chemistry; Belgrade (Serbia); 21-23 September 200