Polychlorinated dibenzo-p-dioxins (PCDDs) and furans (PCDFs) in urban air and deposition in the United Kingdom.
Polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) have been monitored in air and deposition at four UK urban sites (London, Cardiff, Manchester and Stevenage) since the beginning of 1991; data from the first 2 years are presented here. Median Σ2,3,7,8-substituted PCDD/F concentrations in air were 3.2, 4.0, 3.5 and 2.6 pg/m(3) respectively for London, Cardiff, Manchester and Stevenage. Median Σ2,3,7,8-substituted PCDD/F deposition fluxes were 1.5 ng/m(2)/day in London, 1.4 ng/m(2)/day in Cardiff and Manchester and 0.79 ng/m(2)/day in Stevenage. Seasonal variations in the PCDD/F concentrations were observed at all sites for both air and deposition, with concentrations/fluxes generally elevated during the winter.
Institute of Environmental and Biological Sciences, Lancaster University, LAI 4YQ, Lancaster, UK.
R
R
Duarte-Davidson
P
P
Clayton
P
P
Coleman
B J
BJ
Davis
C J
CJ
Halsall
P
P
Harding-Jones
K
K
Pettit
M J
MJ
Woodfield
K C
KC
Jones