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Assessing the contribution of diffuse domestic burning as a source of PCDD/Fs, PCBs, and PAHs to the UK atmosphere.

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<mark>Journal publication date</mark>15/07/2000
<mark>Journal</mark>Environmental Science and Technology
Issue number14
Number of pages8
Pages (from-to)2892-2899
<mark>Original language</mark>English


Ambient air samples were taken concurrently at four sites in northwest England to assess the role of domestic burning of coal/wood on ambient levels of PCDD/Fs, PCBs (including co-PCBs), and PAHs. Fifty-six samples (ca. 800 m3 each) were taken in January and February 1998 at an urban site, a rural reference site, and two village sites, which relied on domestic burning for space heating. Correlations with meteorological parameters found the urban site to be a source area of all POPs investigated, while the village sites had a local impact of PAHs and, to a lesser extent, PCDD/Fs. PCDD/F-levels changed simultaneously at all sites, pointing toward a combination of regional meteorological effects and increased domestic burning. Two sampling events, marked by low ambient temperatures and wind speeds, showed substantial increases in PCDD/F and PAH concentrations (by factors of 2−5). We estimate that local sources at the villages accounted for 25% of the ΣTEQ (with 75% stemming from advective transport) and 75% of the ΣPAHs in the ambient air at those sites (25% advective transport) during our winter sampling events. This study singled out PCDFs, notably the lower chlorinated ones, as good indicators of domestic burning, together with a range of PAHs. The co-PCBs #126 and 169 were found to behave like PCDD/Fs and PAHs rather than the more abundant “regular” PCBs, confirming that they have different sources to the environment.