Persona:
Boronat Castaño, Cecilia

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Boronat Castaño
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Cecilia
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2023 - 20242
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Autor: Correcher, Virgilio × Fecha de finalización: 2024 ×

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Mostrando 1 - 2 de 2
  • Miniatura
    Publicación
    Ultraviolet C radiation on polypropylene: A potential way to reduce plastic pollution
    (Elsevier, 2024) Correcher, Virgilio; Boronat Castaño, Cecilia; Garcia Guinea, Javier; Bravo Yagüe; Bravo Yagüe, Juan Carlos; https://orcid.org/0000-0003-0864-6861; https://orcid.org/0000-0003-1848-3138
    This study investigates the application of ultraviolet C (UVC) radiation to extend the lifetime of healthcare items containing polypropylene (PP), particularly personal protective equipment (PPE). The main objectives involve assessing possible PP damage from UVC exposure and detecting UVC treatment within PP samples. FTIR spectroscopy and Raman spectroscopy reveal slight degradation in UVC-irradiated PP samples, demonstrating resilience post-treatment. Investigations using commercial thermoluminescence dosimeters (TLD-100, TLD-200, TLD-400 and GR-200) positioned under varying thicknesses of PP (0.20 and 0.80 mm) identify TLD-100 as a promising UVC detector. Conversely, TLD-200 and TLD-400 do not prove to be effective detectors, exhibiting similar behavior to the dosimeters without a plastic sample. And GR-200 does not possess the capability to differentiate between ionizing and non-ionizing components of UVC radiation. This research emphasizes the role of UVC to prolong the lifetime of healthcare items containing PP, thus aiding in efforts to reduce plastic pollution
  • Miniatura
    Publicación
    Comparing the effect of electron beam, beta and ultraviolet C exposure on the luminescence emission of commercial dosimeters
    (Elsevier, 2023-07-05) Correcher, Virgilio; Sarasola Martín, Iciar; García Guinea, Javier; Benavente Cuevas, José Francisco; Boronat Castaño, Cecilia; Bravo Yagüe, Juan Carlos
    This paper reports on the luminescence characterization of TLD-100 (LiF: Ti, Mg), TLD-200 (CaF2: Dy), TLD-400 (CaF2: Mn) and GR-200 (LiF: Mg, Cu, P) dosimeters exposed to electro beam, beta and ultraviolet C radiation -UVC-. All of them show high sensitivity to radiation regardless of whether it is ionizing or partially ionizing radiation based on their luminescence properties (cathodoluminescence -CL- or thermoluminescence -TL-). CL emission differs significantly among them in shape and intensity due to their chemical compositions. LiF samples display three maxima at: (i) 300-450 nm linked to intrinsic and structural defects, (ii) a green waveband probably due to F3+ centres or the presence of hydroxyl groups and (iii) the red-infrared emission band associated with F2 centres. However, CL spectra from the CaF2 dosimeters display meaningful differences due to the dopant. TLD-200 is characterized by an emission with four sharp individual peaks in the green-IR spectral region (due to the Dy3+), whilst TLD-400 exhibits a broad maximum peaked at ̴ 500 nm (linked to the Mn2+). On the other hand, the variation in the TL glow curves allows to discriminate the TLDs exposed to beta and UVC radiation since they give rise to different chemicalphysical processes and that have been studied from the estimation of the kinetic parameters by means of the Computerised Glow Curve Deconvolution (CGCD) method.