Estimation of local and external contributions of biomass burning to PM2.5 in an industrial zone included in a large urban settlement.

摘要: A total of 85 PM2.5 samples were collected at a site located in large industrial zone (Porto Marghera, Venice, Italy) during 1-year-long sampling campaign. Samples analyzed to determine water-soluble inorganic ions, elemental and organic carbon, levoglucosan, results processed investigate the seasonal patterns, relationship between species, most probable sources by using set tools, including (i) conditional probability function (CPF), (ii) bivariate (CBPF), (iii) concentration weighted trajectory (CWT), (iv) potential source contribution (PSCF) analyses. Furthermore, importance biomass combustions was also estimated. Average concentrations ranged 54 16 μg m−3 cold warm period, respectively. The mean value ions 11 μg m−3 (range 1–46 μg m−3): abundant ion nitrate with share 44 % followed sulfate (29 %), ammonium (14 potassium (4 chloride %). Levoglucosan accounted for 1.2 mass, its from few ng m−3 periods 2.66 μg m−3 winter. levoglucosan period higher than those found other European urban sites. This result may indicate great influence on particulate matter pollution. Elemental carbon (EC, OC) showed similar behavior, highest contributions lower summer. ratios burning indicators (K+, Cl−, NO3 −, SO4 2−, EC, used as proxy estimation, OC calculated (LG)/OC LG/PM2.5 estimated be 29 18 %,