| Texto completo | |
| Autor(es): |
Rosa, Andre Henrique
;
Stubbings, William A.
;
Akinrinade, Olumide Emmanuel
;
Gontijo, Erik Sartori Jeunon
;
Harrad, Stuart
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Environmental Pollution; v. 341, p. 9-pg., 2023-11-19. |
| Resumo | |
The impact of measures to restrict population mobility during the COVID-19 pandemic on atmospheric co-centrations of polycyclic aromatic hydrocarbons (PAH) and brominated flame retardants (BFRs) is poorly understood. This study analyses the effects of meteorological parameters and mobility restrictions during the COVID-19 pandemic on concentrations of PAH and BFRs at the University of Birmingham in the UK utilising a neural network (self-organising maps, SOM). Air sampling was performed using Polyurethane Foam (PUF) disk passive samplers between October 2019 and January 2021. Data on concentrations of PAH and BFRs were analysed using SOM and Spearman's rank correlation. Data on meteorological parameters (air temperature, wind, and relative humidity) and mobility restrictions during the pandemic were included in the analysis. Decabromodiphenyl ether (BDE-209) was the most abundant polybrominated diphenyl ether (PBDE) (23-91% sigma 7PBDEs) but was detected at lower absolute concentrations (4.2-35.0 pg m-3) than in previous investigations in Birmingham. Air samples were clustered in five groups based on SOM analysis and the effects of meteorology and pandemic-related restrictions on population mobility could be visualised. Concentrations of most PAH decreased during the early stages of the pandemic when mobility was most restricted. SOM analysis also helped to identify the important influence of wind speed on contaminant concentrations, contributing to reduce the concentration of all analysed pollutants. In contrast, concentrations of most PBDEs remained similar or increased during the first COVID-19 lockdown which was attributed to their primarily indoor sources that were either unaffected or increased during lockdown. (AU) | |
| Processo FAPESP: | 22/00985-6 - Presença de poluentes orgânicos persistentes (POPs) em resíduos sólidos e seu impacto para implementação de uma economia circular |
| Beneficiário: | André Henrique Rosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 19/06800-5 - Poluentes orgânicos persistentes emergentes no ambiente: ênfase em retardantes de chama bromados (BFRs) e substâncias perfluoroalquílicas (PFASs) |
| Beneficiário: | André Henrique Rosa |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |