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- W1120456415 abstract "As part of a monitoring program initiated in 1998 and conducted by IDAD – Institute for Environment and Development and supported by regional municipal solid waste (MSW) management authorities, an extensive database of dioxins’ and furans’ (PCDD/PCDF) concentrations in ambient air was collected in Porto, in two sites classified as suburban. The present paper summarizes the analytical results of PCDD/PCDF in ambient air obtained from 2001 to 2014 through this intensive monitoring work. The toxic equivalent (WHO-TEQ 1998) concentrations of the PCDD/PCDF in the air ranged from 8.2 to 904.4 fg TEQ m−3, with an average and median values of 104.5 fg TEQ m−3 and 49.8 fg TEQ m−3, respectively. The PCDD/PCDF concentration trend in Porto’s ambient air shows a clear drop of the annual average values occurred during the study period. The presence of seasonal variations is very clear in the present study. Winter levels (average: 154.3 fg TEQ m−3) are significantly higher than summer levels (average: 42.9 fg TEQ m−3). The PCDD/PCDF profiles’ details show that several differences occurred over time. The homologue profiles presented changes and the PCDD congeners have decreased in terms of mass. The analysis of concentrations in combination with specific homologue and congener patterns of PCDD/PCDF allowed identification of potential emission sources." @default.
- W1120456415 created "2016-06-24" @default.
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- W1120456415 date "2015-10-01" @default.
- W1120456415 modified "2023-09-26" @default.
- W1120456415 title "Long-time monitoring of polychlorinated dibenzo-p-dioxins and dibenzofurans over a decade in the ambient air of Porto, Portugal" @default.
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- W1120456415 doi "https://doi.org/10.1016/j.chemosphere.2015.07.052" @default.
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