Atmospheric bulk deposition to the lagoon of Venice

The correlations between fluxes of inorganic micropollutants and grain-size were significant. Multivariate statistical analysis was applied to investigate more accurately relationships between the insoluble and dissolved fractions of inorganic micropollutants and grain-size fractions. In particular, significant correlations were highlighted between the dissolved fraction of As and the ≤ 1 μm particle size fraction. Relations between levels of ΣPCDDF, ΣPCDD, PCB and PAH congeners and grain-size revealed significant correlation coefficients for the remote sites (B, C), and none in the urban and industrial sites (A, D). In particular, significant correlations were highlighted between ΣPCDDF, ΣPCDD and particle size fraction ≤ 2 μm, and between benzo(a)pyrene and PCB 167 and particle size fraction 4-8 μm.