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Sixty atmospheric sample concentrations of PM2.5 and polycyclic aromatic hydrocarbons (PAHs) in PM2.5 were analyzed in distinct seasonal variations from a classic agglomeration industrial city. The concentrations of PM2.5 ranged from 6.96 to 260.06 μg/m3 with an average of 177.05 μg/m3. Only 38% of the sampling days were superior to the 24-h limit value (75 μg/m3) of ambient air quality standards...
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