The pernicious effects of deposition of airborne particles on monumental stones have been widely demonstrated, but estimates of deposition fluxes on historic buildings remains an hard task because of the lack of careful experiments and modelling. AERBOX is a new box model, developed by ENVIROWARE Srl and ENEA, simulating the whole life cycle of aerosols. AERBOX takes into account all the relevant chemical and physical processes involved: emission, chemical reactions in gas and in gas-liquid phases, deposition, entrainment, condensation and nucleation. Concentration and deposition rates of 52 species of gaseous pollutants and 14 species of particulate pollutants are calculated on hourly basis. AERBOX has been applied to estimate the flux of particulate matter deposited on the monumental area of Florence downtown. The emission inventory has been developed by the Tuscany Region and it includes the industrial and mobile sources of the 50 km x 50 km surrounding area, referring to the Florence and Prato counties. The time and chemical profiles of the emissions have been adapted to the Tuscany from the reference profiles given by both California Air Resource Board and EPA and meteorological inputs were given by the Tuscany Meteorological Centre. Concentrations and deposition fluxes in typical summer and winter workdays and holidays have been calculated and an estimate of the effects of cumulated deposition on the monuments is also given.
|Titolo:||An Evaluation of Particle Deposition Fluxes on the Monumental Area of Florence, Italy|
|Data di pubblicazione:||23-mag-2002|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|