Environmental impact on historical monuments: the black crusts of the Venice lagoon

Luciana Randazzo, Natalia Rovella, Silvia Muto, Fabrizio Antonelli, Elena Tesser, Mauro Francesco La Russa

Abstract

Black crusts are typical decay forms on calcareous rocks in polluted urban environments. Their origin is due to sulphation reaction of calcium carbonate substrates (CaCO3), as a consequence of pH value decrease caused by SO2 in the polluted atmosphere. They can be therefore defined as a passive air pollution sampler. For the purpose of this work, samples from the historic center of Venice were analyzed. The city of Venice suffers in particular maritime and industrial pollution (Marghera industrial zone). By means of minero-petrographic and geochemical analyses, it was possible to obtain information on the mineralogy of the crust and its interaction with the underlying substrates, other than useful information on the chemical composition in terms of major and traces elements linked to the various sources of urban pollution.

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IMEKO-TC4-MetroArchaeo2020-089.pdf

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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