scholarly journals Iron polyphosphate glasses for waste immobilization

2019 ◽  
Vol 11 (1) ◽  
pp. 4-14 ◽  
Author(s):  
Richard K. Brow ◽  
Cheol W. Kim ◽  
Signo T. Reis
Keyword(s):  
Waste Immobilization ◽  
Polyphosphate Glasses

scholarly journals An Insight into the Correlation between Chemical Composition Changes of Aluminum-Iron-Polyphosphate Glasses and Thermal Properties

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2065
Author(s):  
Pawel Goj ◽  
Aleksandra Wajda ◽  
Agata Stoch ◽  
Ireneusz Krakowiak ◽  
Pawel Stoch
Keyword(s):  
Thermal Properties ◽  
Chemical Composition ◽  
Melting Temperature ◽  
Scanning Calorimetry ◽  
Essential Information ◽  
Radioactive Waste Immobilization ◽  
Waste Immobilization ◽  
Polyphosphate Glasses ◽  
Diffraction Patterns ◽  
Nuclear Waste Immobilization

The present study aimed to investigate the influence of the gradual substitution of Fe2O3 by Al2O3 on the thermal properties of polyphosphate glasses. The conducted considerations based on differential scanning calorimetry (DSC) and heating microscopy thermal analysis provided much essential information about the correlation between glass chemical composition and its characteristic parameters, such as transformation temperature, specific heat, crystallization temperature, crystallization enthalpy, the activation energy of crystal growth, melting temperature, and Angell glass thermal stability. The obtained estimation of viscosity changes as a function of temperature could be very helpful for researchers to correctly plan the vitrification process and thus radioactive waste immobilization. A precise analysis of DSC curves and X-ray diffraction patterns revealed the possibility of crystallization process design in order to create materials with different levels of crystallinity and phase composition. The drawn conclusions allow choosing the glass with the optimal concentration of Al2O3 and Fe2O3, which ensures the relatively low melting temperature, viscosity, and glass crystallization ability, with application potential in nuclear waste immobilization.

Unravelling the dissolution mechanism of polyphosphate glasses by 31P NMR spectroscopy: ligand competition and reactivity of intermediate complexes

2021 ◽  
Author(s):  
Dahiana Andrea Avila Salazar ◽  
Peter Bellstedt ◽  
Atsuhiro Miura ◽  
Yuki Oi ◽  
Toshihiro Kasuga ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Biomedical Applications ◽  
Structural Changes ◽  
31P Nmr ◽  
Dissolution Mechanism ◽  
31P Nmr Spectroscopy ◽  
Glass Dissolution ◽  
Polyphosphate Glasses

Phosphate glass dissolution can be tailored via compositional and subsequent structural changes, which is of interest for biomedical applications such as therapeutic ion delivery. Here, solid-state 31P nuclear magnetic resonance...

Carbon dioxide use in beneficiation of landfilled coal ash for hazardous waste immobilization

2018 ◽  
Vol 6 (2) ◽  
pp. 2055-2062 ◽  
Author(s):  
Kaize Zhu ◽  
Faris Matalkah ◽  
Salina Ramli ◽  
Brian Durkin ◽  
Parviz Soroushian ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hazardous Waste ◽  
Coal Ash ◽  
Waste Immobilization
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