Browsing by Subject "Uranium"
Now showing items 21-33 of 33
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Speciation and spectrophotometric determination of uranium in seawater
(2004)A series of ion-exchange and extraction procedures for the separation of uranium from seawater samples and subsequent spectrophotometric determination of uranium in seawater by means of arsenazo(III) is described. According ...
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A Study of Solid-Liquid Phase Equilibria of Pu(VI) and U(VI) in Aqueous Carbonate Systems
(1993)Solubility products of PuO2CO3(s) and UO2CO3(s) are determined in 0.1 M NaC1O4 at 22 1 C under 100%, 1 % and 0.03% CO2. The carbonate precipitates of Pu(VI) and U(VI), prepared under 100% CO2 at neutral pH, are characterized ...
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Article
Uranium adsorption by non-treated and chemically modified cactus fibres in aqueous solutions
(2013)The adsorption efficiency of Opuntia ficus indica fibres regarding the removal of hexavalent uranium [U(VI)] from aqueous solutions has been investigated prior and after the chemical treatment (e.g. phosphorylation and ...
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Article
Uranium analysis in Cypriot groundwaters by total alpha-radiometry and alpha-spectroscopy
(2011)Two different alpha-radiometric methods (e.g. alpha-spectroscopy and alpha-particle counting) have been applied to the determination of uranium in Cypriot groundwater samples after separation of the radionuclides by cation ...
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Uranium analysis in drinking waters in Cyprus
(2017)Uranium determination and speciation in drinking waters consumed in Cyprus has been carried out by means of alpha-spectroscopy and thermodynamic calculations. Sampling included tap waters from different areas as well as ...
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Article
Uranium desorption from microplastic surfaces
(Springer, 2023)The desorption of uranium from microplastic surfaces has been investigated as a function of pH in aqueous solutions under ambient conditions. In addition, the effect of complexing ligands (e.g. EDTA) on the desorption from ...
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Uranium determination in water samples by liquid scintillation counting after cloud point extraction
(2010)The aim of this study is the radiometric determination of uranium in waters by liquid scintillation counting (LSC) after pre-concentration of the element by cloud point extraction (CPE). For CPE, tributyl phosphate (TBP) ...
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Uranium in ground water samples of Northern Greece
(2011)The activity concentrations of 238U and 234U have been determined in groundwater samples of hot springs and deep wells in Northern Greece. The analysis was performed by alpha spectroscopy after pre-concentration and ...
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Uranium levels in Cypriot groundwater samples determined by ICP-MS and α-spectroscopy
(2013)The uranium concentration and the isotopic ratio 238U/234U have been determined in Cypriot groundwater samples by ICP-MS after ultrafiltration and acidification of the samples and α-spectroscopy after pre-concentration and ...
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Uranium sorption from aqueous solutions by activated biochar fibres investigated by FTIR spectroscopy and batch experiments
(2015)The efficiency of activated biochar fibres obtained from Opuntia ficus indica regarding the sorption of hexavalent uranium (U(VI)) from aqueous solutions has been investigated by batch experiments, as a function of various ...
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Doctoral Thesis Open Access
Ανάλυση και χημική συμπεριφορά ουρανίου και άλλων ακτινίδων σε φυσικά/περιβαλλοντικά συστήματα της Κύπρου
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2014-12)Αντικείμενο μελέτης της παρούσας Διδακτορικής Διατριβής αποτελεί η κατανόηση της χημικής συμπεριφοράς ραδιενεργών στοιχείων σε φυσικό περιβαλλοντικά συστήματα (υπόγεια, θαλάσσια ύδατα και θαλάσσια ιζήματα), καθώς επίσης ...
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Doctoral Thesis Open Access
Μελέτη προσρόφησης μεταλλοϊόντων (Cu(II), Eu(III), U(VI)) σε βιομάζα και ανόργανα στερεά
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2008-05)Αντικείμενο έρευνας της παρούσας Διδακτορικής Διατριβής, αποτελεί η προσρόφηση μεταλλοϊόντων σε επιφάνειες οργανικών και ανόργανων στερεών. Συγκεκριμένα, η παρούσα ερευνητική εργασία εστιάζεται στη μελέτη της προσρόφησης ...
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Doctoral Thesis Open Access
Σύνθεση και δραστικότητα συμπλοκών του ουρανίου, του βαναδίου και του χαλκού με τριαζινικούς και αμιδικούς υποκαταστάτες
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2019-10)Στην παρούσα διδακτορική εργασία μελετήθηκαν η εκλεκτική συμπλοκοποίηση του ουρανίου από τριαζινικούς υποκαταστάτες και η ενεργοποίηση του οξυγόνου από αμιδικά και τριαζινικά πυριμιδικά σύμπλοκα του χαλκού και του βαναδίου. ...