Research Article

Effect of Ambient PM2.5-Bound BbFA and DahA on Small Airway Dysfunction of Primary Schoolchildren in Northeast China

Table 1

Comparison of ambient concentrations of PM2.5-bound PAH456 in schools A and B during heating and nonheating seasons (ng/m3).

Heating seasonNonheating season
School ASchool BSchool ASchool B
GMsMP25P50P75GMsMP25P50P75GMsMP25P50P75GMsMP25P50P75

FLA6.986.742.966.7416.2811.599.835.599.8321.300.0930.490.440.280.440.780.530.520.360.530.840.60
PY7.307.413.297.4118.489.849.114.569.1118.500.1540.300.320.190.320.700.400.550.270.550.990.31
CHR8.348.234.368.2315.9510.7410.365.7910.3617.750.0670.650.740.390.741.650.610.740.460.741.220.32
BaA8.518.694.018.6917.7011.2011.305.1811.3021.950.0600.470.390.200.391.780.440.390.240.390.880.48
BbFA6.005.883.285.8811.288.287.965.247.9612.850.0191.001.100.681.101.741.171.190.791.191.940.35
BkFA3.794.651.654.6510.305.576.802.746.8010.590.0420.931.010.591.021.611.001.060.751.061.760.24
BaP5.235.312.825.319.846.596.463.506.4611.650.0340.530.470.290.471.020.540.470.280.471.140.21
DahA0.820.890.380.891.601.030.990.520.992.150.0370.100.110.050.110.170.120.110.060.120.270.45
BghiP2.483.631.303.636.063.544.031.594.037.630.0690.560.540.300.541.100.630.660.290.661.300.27
IcdP2.663.501.123.507.193.404.471.354.478.900.0750.490.440.260.440.960.570.530.270.531.220.13
Σ10-PAHs54.7252.2526.8952.25115.2476.3275.7139.4975.71125.810.0465.966.443.796.4410.226.696.564.426.569.870.37

GMs, geometric means; M, median; Σ10-PAHs, sum of 4–6-ring PAH concentrations; vs. ambient PM2.5-bound 4–6-ring PAHs in school A during the heating season.