Disequilibrium of dissolved 234U/238U and 210Po/210Pb in Greek riversDisequilibrium of dissolved 234U/238U and 210Po/210Pb in Greek rivers Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2018-05-142017enFor the first time, a radiological study for the dissolved 238U, 234U, 210Pb and 210Po was held in major Greek rivers across the country. 234U/238U activity ratios are above one in all samples and 210Po/210Pb activity ratios are respectively below the unit indicating the disequilibrium in the samples. Quite satisfactory correlations were observed among 234U and 238U as well as among 210Po and 210Pb values. Uranium isotopes were separated by ion exchange and electroplated on stainless steel plates. 210Po was spontaneously deposited on nickel plates, while 210Pb was indirectly determined through the ingrowth of 210Po. The sources were measured by a-spectrometry.http://creativecommons.org/licenses/by/4.0/Journal of Radioanalytical and Nuclear Chemistry3122285-292 Xarchoulakos Dimitrios Ξαρχουλακος Δημητριος Kehagia Konstantina Kallithrakas-Kontos Nikolaos Καλλιθρακας-Κοντος Νικολαος Potiriadis Constantinos Springer Verlag 210Pb 210Po Alpha-spectrometry Disequilibrium Greek rivers Uranium isotopes