Size?resolved source apportionment of particulate matter from a megacity in northern China based on one-year measurement of inorganic and organic components

This research apportioned size-resolved particulate matter (PM) contributions in a megacity northern China based on full year of measurements both inorganic and organic markers. Ions, elements, carbon fractions, n-alkanes, polycyclic aromatic hydrocarbons (PAHs), hopanes steranes 9 p.m. size fractions were analyzed. High molecular weight PAHs concentrated fine PM, while most other compounds showed two peaks. Both two-way three-way receptor models used for source apportionment PM different ranges. The model gave clearer separation factors than the model, because it uses combination chemical composition distributions, so that with similar but distinct distributions (like more mature less coal combustion) can be resolved. resolved six primary three secondary factors. Gasoline vehicles biomass combustion, nitrate high relative humidity related aerosol, resuspended dust diesel (exhaust non-exhaust) are top contributors to pseudo-ultrafine (<0.43 ?m), (0.43–2.1 ?m) coarse mode (>2.1 respectively. Mass concentration from industrial emissions, vehicle sources bimodal distribution, gasoline exhibited peak mode, separately. sulphate, aerosol distribution correlated temperature, indicating strong photochemical processing repartitioning. was strongly associated shifts NO3? SO42? usual 0.43–0.65 ?m 1.1–2.1 ?m. Our results demonstrated dominance combustion <0.43 particle mass, contrast mass Northern megacity.