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Sensitivity of PM10 oxidative potential to aerosol chemical composition at a Mediterranean urban site: ascorbic acid versus dithiothreitol measurements


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Título :
Sensitivity of PM10 oxidative potential to aerosol chemical composition at a Mediterranean urban site: ascorbic acid versus dithiothreitol measurements
Autor :
Clemente, Á.
Gil Moltó, Juan
Yubero Funes, Eduardo  
Juárez, N.
Nicolás, J.F.
Crespo, J.
Galindo, Nuria  
Departamento:
Departamentos de la UMH::Física Aplicada
Fecha de publicación:
2023-03-01
URI :
https://hdl.handle.net/11000/30149
Resumen :
The oxidative potential (OP) of PM10 daily samples collected at a traffic site in southeastern Spain during summer and winter was assessed by two acellular assays: the ascorbic acid (AA) and dithiothreitol (DTT) methods. Although PM10 levels were similar during both periods, OP values (expressed in nmol min− 1 m− 3) showed a defined seasonal trend. The AA activity was higher in summer than in winter, whereas the DTT reactivity exhibited an opposite seasonal pattern. Both assays were sensitive to different PM10 components, as shown by the results of the linear correlation analysis. Moreover, the relationship between OP values and PM10 chemical species was not the same during summer and winter, indicating that particle toxicity is associated with different sources during the warm and cold seasons. When OP values were expressed on a mass basis (nmol min− 1 μg−1), lower correlation coefficients with PM10 chemical species were generally obtained compared to volume-normalized activities. These outcomes suggest that only some specific components have a significant intrinsic oxidative potential.
Palabras clave/Materias:
Oxidative potential
Chemical components
Seasonal variations
Correlation analysis
Área de conocimiento :
CDU: Ciencias puras y naturales: Física
Tipo documento :
application/pdf
Derechos de acceso:
info:eu-repo/semantics/openAccess
DOI :
https://doi.org/10.1007/s11869-023-01332-1
Aparece en las colecciones:
Artículos Física Aplicada



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