Abstract
PAH indoor-to-outdoor relationship and exposure levels in Rome Background. Polycyclic aromatic hydrocarbons (PAHs) are known to be harmful to human health. Spatial variability of the emissions, atmospheric dispersion, infiltration of the particles from outdoor to indoors, and population time-activity defines the exposures. Since the time spent inside is typically 80-90% (followed by time spent in traffic and outdoors), indoor exposures and thus particle infiltration from outdoors is a key issue. Aim. The aim of the work is to study the indoor-outdoor (I/O) relationship of PAH concentrations between non-heating and heating periods in different microenvironments (homes, schools, offices and traffic), and to estimate the population exposure levels in different seasons. This work is a part of the on-going Life+ EXPAH project. Methods. The current work uses PM2.5-bound PAH concentration measurements carried out in Rome, Italy, as an input data. The I/O relationships of PAHs are evaluated and entered to a mass-...
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