Nicolae DURA

28-73 ÎNGLOBAREA DEŞEURILOR PE BAZĂ DE PLUMB ÎN STICLE TELURATE

Această intrare a fost publicată în 2015 Volumul 28 și etichetată Elena Maria PICĂ Eugen Culea Marius RADA Mioara Zagrai Nicolae DURA Simona Rada Vasile POP la de

THE INTEGRATED OF THE LEAD WASTES
IN TELLURATE GLASSES
In this work, we report structural investigations on vanadate-tellurate and borate-tellurate glasses system doped with lead oxide obtained by melt quenching method. The purpose of this paper was i) to integrate of the lead ions in these glasses and ii) to investigate of the structural properties of the obtained glasses in order to possible applications in the wastes recycling.
FTIR spectra analysis suggests that the lead oxide generates the rapidly deformation of the Te-O-Te linkages from [TeO4] structural units. Further the excess of oxygen ions can be accommodated in the host matrix by conversion of some [VO4] structural units into pyro vanadate units. Then, the increase of the lead oxide in the borate-tellurate matrix will produce the intercalation of [PbOn] entities where n=3 and 4.
Based on FTIR results, we found that the increase of the lead oxide in the borate-tellurate network suggests a gradual inclusion of these ions in the host matrix by the intercalation of [PbOn] structural units.
Keywords: bottles of lead telluride-based, IR, recycling
Cuvinte cheie: sticle telurate pe bază de plumb, spectroscopie IR, reciclare

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26-28 IMOBILIZAREA UNOR DEŞEURI RADIOACTIVE ÎN SISTEME VITROASE PE BAZĂ DE PLUMB

Această intrare a fost publicată în 2014 Revista Volumul 26 și etichetată Elena Maria PICĂ Eugen Culea Liviu Bolunduţ Loredana Rus Mioara Zagrai Nicolae DURA Simona Rada la de

IMOBILIZATION OF THE RADIOACTIVE WASTES
IN VITREOUS SYSTEMS ON THE BASED OF LEAD
Immobilization of radioactive wastes by the vitrification method is a
well-established process that was selected because glass is highly stable, very
durable and has the ability to incorporate a wide variety of chemical
contaminants. In this work, we propose a study of the structural and behaviour
properties of lead glasses with xGd2O3∙(100-x)[4PbO2∙Pb] composition where
x=0-50%mol Gd2O3 in view of the possible applications as alternative of
immobilization of the radioactive wastes.
One of the most important requirements for the technology used in the
immobilization of nuclear wastes is to include as much as possible waste per
unit mass of the host vitreous matrix. We were synthesized the gadolinium-lead
glasses up to 50% mole Gd2O3. EPR data suggest that the gadolinium ions at
high contents have a behaviour of network former and not network modifier.
Keywords: bottles, Gadolinium-based lead, IR spectroscopy and RES,
waste
Cuvinte cheie: sticle pe bază de gadoliniu-plumb, spectroscopie IR şi
RES, deşeuri
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