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Environmental Monitoring and Assessment

, Volume 186, Issue 6, pp 3917–3929 | Cite as

Deposition fluxes of PCDD/Fs in the area surrounding a steel plant in northwest Italy

  • Maurizio Onofrio
  • Roberta Spataro
  • Serena Botta
Article

Abstract

The paper aims at investigating the contribution of a steel plant located in a rural area in northwestern Italy (700,000 tons of steel/year) to the deposition fluxes of Polychorinated Dibenzo-p-dioxins and Polychorinated dibenzofurans (PCDD/PCDFs) at local level through the analysis of sampling data, literature data, and air dispersion model (AERMOD)output data. Total measured deposition fluxes of PCDD/PCDFs in three monitoring stations were consistent with other studies carried out in Italy in urban and suburban areas and in rural European areas; while these were lower than those measured in other European urban/suburban areas or in sites influenced by industrial sources. Furthermore, the measured fluxes were also compared with the pattern of PCDD/Fs in ambient air sampled at the same sites in a previous study. This comparison showed a similarity between air concentration and deposition patterns of the samples collected at the three monitoring stations and a clear distinction of these from the source. The study was completed with AERMOD simulations, conducted with a mass mean particle diameter of 0.5 μm, according to the particle size distribution of the samples collected at the source. AERMOD calculated deposition fluxes of two to three orders of magnitude lower than those measured in two monitoring points; while in the most distant monitoring station, the deposition fluxes were too low to be calculated by the model. The simulations confirmed that the most distant monitoring station was not subject to emissions from the steel plant. The analysis highlighted the limited influence of the source in the local PCDD/F deposition fluxes.

Keywords

PCDD/Fs Air dispersion model Deposition Steel plant emissions PCA 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Maurizio Onofrio
    • 1
  • Roberta Spataro
    • 1
  • Serena Botta
    • 1
  1. 1.Department of Engineering of Environment, Land and InfrastructuresPolitecnico di TorinoTurinItaly

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