Newly developed CeO2 and Gd2O3-reinforced borosilicate glasses from municipal waste ash and their optical, structural, and gamma-ray shielding properties
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Summary
This summary is machine-generated.This study developed novel borosilicate glasses from municipal solid waste ash, doped with cerium (CeO2) and gadolinium (Gd2O3). These glasses exhibit promising radiation shielding properties and stability after gamma irradiation.
Area Of Science
- Materials Science
- Nuclear Engineering
- Waste Management
Background
- Municipal solid waste (MSW) ash is a problematic waste stream.
- Borosilicate glasses offer tunable optical and physical properties.
- Radiation shielding materials are crucial for nuclear applications.
Purpose Of The Study
- To synthesize CeO2, Gd2O3, and CeO2+Gd2O3 doped borosilicate glasses from MSW ash.
- To investigate the optical, structural, physical, and radiation shielding characteristics of these glasses.
- To evaluate the influence of 100 kGy gamma irradiation on the glass properties.
Main Methods
- Melting-quenching technique for glass synthesis.
- UV-visible NIR, photoluminescence (PL), FTIR, and ESR spectroscopy for optical and structural analysis.
- Microhardness and coefficient of thermal expansion (CTE) measurements for physical properties.
- Phy-X/PSD program for calculating radiation shielding parameters (MAC, LAC, Zeff, HVL).
Main Results
- UV peaks at 351, 348, and 370 nm (Ce3+, Gd3+); PL emissions at 412, 434, 417 nm.
- FTIR revealed silicate and borate structural units.
- Glasses showed stability in FTIR, ESR, and CTE after 100 kGy gamma irradiation.
- Microhardness increased due to enhanced structural compactness.
- Ce+Gd doped glass exhibited superior radiation shielding (higher MAC, LAC, Zeff; lower HVL) compared to Ce or Gd doped glasses and commercial concretes.
Conclusions
- MSW ash can be beneficially utilized to produce CeO2 and/or Gd2O3 doped borosilicate glasses.
- These glasses possess excellent optical, structural, and physical stability, even after gamma irradiation.
- The developed glasses demonstrate promising and economical radiation shielding capabilities.
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