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Table 3.5.1.
Trend of PAH levels and other coincident parameters measured in street air in the center of Copenhagen.
 

 

Impact of Regulations of Traffic Emissions on PAH Level in the Air
Compound 1996
concentration 		1992
concentration 		1996 to 1992
ratio* 		1993 to 1992
ratio** 		1986 + 1987
to 1992 ratio
Benzo(bjk)fluoranthenes (ng/m3) 6.5 ± 1.4 9.5 ± 2.2 0.68 0.83 2.33
Benzo(a)pyrene (ng/m3) 2.2 ± 0.6 4.6 ± 1.4 0.48 0.62 1.98
Benzo(e)pyrene (ng/m3) 3.1 ± 0.7 4.4 ± 0.8 0.69 0.92 1.89
Benzo(ghi)perylene (ng/m3) 5.1 ± 1.1 8.1 ± 1.4 0.63 0.83 1.77
Coronene (ng/m3) 3.8 ± 1.0 5.9 ± 1.3 0.63 0.87 2.02
DieselBeP (ng/m3) 1.4 ± 0.4 2.2 ± 0.5 0.62 1.14
NO (ppb) 101 ± 13 132 ± 14 0.76 1.00 1.50
Gas NOy (ppb) 133 ± 16 164 ± 15 0.81 0.99 1.44
SO2 (ppb) 2.6 ± 0.5 7.4 ± 0.8 0.35 0.96 1.78
CO (ppm) 1.70 ± 0.20 1.94 ± 0.16 0.88 1.10
Soot (µg/m3) 48 ± 7 55 ± 5 0.83
Particulate matter (µg/m3) 127 ± 25 94 ± 8 1.35
TA98+S9 (rev./m3) 48 ± 41 72 ± 38 0.67 0.19 1.26
TA98-S9 (rev./m3) 34 ± 28 51 ± 27 0.67 0.42 1.45
TA98NR (rev./m3) 15 ± 12 38 ± 21 0.40 0.22 1.26
Risø wind-rate (m/s) 5.9 ± 1.3 5.8 ± 0.6
Risø temperature (°C) 3 ± 3 3.4 ± 0.6
No. of samples 15-20 23-77

* average ratio of 7 PAH (BbjkF, BaP, BeP, BghiP and Cor) 0.62 ± 0.08, average ratio of 3 mutagenicity tests 0.58 ± 0.18 and average ratio of 4 reference components (soot, NO, gas NOy and CO) 0.82 ± 0.05. Both PAH and mutagenicity average ratio was significant lower than that of the 4 inorganic reference components (t-test, p< 0.01).

** average ratio of 7 PAH (BbjkF, BaP, BeP, BghiP and Cor) 0.81 ± 0.12, average ratio of 3 mutagenicity tests 0.28 ± 0.15 and average ratio of 4 reference components (NO, gas NOy, CO and SO2) 0.97 ± 0.06. Both PAH and mutagenicity average ratio was significant lower than that of the 4 inorganic reference components (t-test, p< 0.05 and p< 0.001, respectively).