Seasonal and Spatial Variations of the Oxidative Properties of Ambient PM2.5 in the Po Valley, Italy, before and during Covid-19 Lockdown Restrictions
Bibliographic Data
| ID | 15464745 |
|---|---|
| Authors | Maria Chiara Pietrogrande (0000-0003-1865-6959, University of Ferrara, corresponding author), Cristina Colombi (0000-0002-0759-0256, Azienda Regionale per la protezione dell'ambiente Lombardia), Eleonora Cuccia (Azienda Regionale per la protezione dell'ambiente Lombardia), Umberto Dal Santo (Azienda Regionale per la protezione dell'ambiente Lombardia), Luisa Romanato (University of Ferrara) |
| Year | 2023 |
| Volume | 20 |
| Issue | 3 |
| Pages | 1797-1797 |
| Publication date | 2023-01-18 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | International Journal of Environmental Research and Public Health (JOURNAL) |
| Journal identifiers | ISSN: 1661-7827 • E-ISSN: 1660-4601 |
| Publisher | Multidisciplinary Digital Publishing Institute (PUBLISHER • CH) |
| DOI | 10.3390/ijerph20031797 |
| PMID | 36767162 |
| OpenAlex | W4317423603 |
| Language | EN |
| References cited | 2 |
This study describes the chemical and toxicological characteristics of fine particulate matter (PM 2.5 ) in the Po Valley, one of the largest and most polluted areas in Europe. The investigated samples were collected in the metropolitan area of Milan during the epidemic lockdown and their toxicity was evaluated by the oxidative potential (OP), measured using ascorbic acid (OP AA ) and dithiothreitol (OP DTT ) acellular assays. The study was also extended to PM 2.5 samples collected at different sites in the Po Valley in 2019, to represent the baseline conditions in the area. Univariate correlations were applied to the whole dataset to link the OP responses with the concentrations of the major chemical markers of vehicular and biomass burning emissions. Of the two assays, OP AA was found mainly sensitive towards transition metals released from vehicular traffic, while OP DTT towards the PM carbonaceous components. The impact of the controlling lockdown restrictions on PM 2.5 oxidative properties was estimated by comparing the OP values in corresponding time spans in 2020 and 2019. We found that during the full lockdown the OP AA values decreased to 80-86% with respect to the OP data in other urban sites in the area, while the OP DTT values remained nearly constant
Aerosol · Ascorbic acid · Biology · Biomass burning · Coronavirus disease 2019 (COVID-19 · Geography · Meteorology · Particulates · Air Quality and Health Impacts · Chemistry · Climate Change and Health Impacts · COVID-19 impact on air quality · Environmental Science · Medicine · Ecology · Environmental Chemistry · Food Science · Toxicology
| Highly cited | No |
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