Contribution of harbour activities and ship traffic to PM2.5, particle number concentrations and PAHs in a port city of the Mediterranean Sea (Italy)

摘要: In this work, an assessment of the impact ship traffic and related harbour activities (loading/unloading ships hotelling in harbour) on PM 2.5 particle number concentrations (PNC) separating contribution associated to from that harbour-related is reported. Further, environmental risks polycyclic aromatic hydrocarbon (PAH) was performed. Results refer city Brindisi (88,500 inhabitants) south-eastern part Italy its (with yearly 9.5 Mt goods, over 520,000 passengers 175,000 vehicles). PM2.5 PNC show a clear daily pattern correlated with harbour. High temporal resolution measurements correlations wind direction were used estimate average direct measured source. The relative 7.4% (±0.5%) for 26% (±1%) PNC. When added, percentages become 9.3% 39% site analysed, air coming harbour/industrial sector richer PAHs (5.34 ng/m3) than sampled all directions (3.89 ng/m3). major compounds phenanthrene, fluoranthene pyrene, but congener profiles different two sectors: phenanthrene fluorene, which are most abundant emissions. showed lighter gas phase, while high molecular weight congeners mostly present particulate phase. studied source 56%(range, 29-87%).