Additional file 1. Trace-element chemical composition expressed as ppm of representative samples of Euganean trachyte from the Renaissance city walls of Padua determined by LA-ICPMS, on both surface (i.e., weathering crust or patina) and host rock (inner part). The samples are divided by different types of alteration and sampling location as in Fig.Â 2 (SCR, Bastione Santa Croce; GAR, Torrione dellâArena; CSN, Bastione Castelnuovo; FST, Torrione Venier)

Claudio Mazzoli (4542586)

Klaus Simon (4542589)

Lara Maritan (3697747)

Luigi Germinario (4542583)

Siegfried Siegesmund (2846351)

Heritage Science

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MOESM1 of Trachyte weathering in the urban built environment related to air quality

Decay of trachyte used as building stone in urban environment was investigated through the analysis of crusts and
patinas found on trachyte of the Euganean Hills in the Renaissance city walls of Padua, northeastern Italy. Mineralogical
and microstructural characteristics of the alteration products, as well as major- and trace-element chemical
composition, were determined by optical microscopy, SEM–EDS and X-ray mapping, XRPD, and LA-ICPMS. The results
are discussed referring to environmental parameters, in particular concerning air quality and anthropic pollution
sources. The influence of composition of the stone and other neighboring materials on specific weathering processes
is also debated. The formation of crusts and patinas turns out to be mainly due to exogenous processes. Enrichment
in heavy metals and carbonaceous matter derives from the deposition of particulate emitted during fuel combustion
by road vehicles, domestic heating and, secondarily, industrial activities. The particulate is typically cemented by
calcite, mainly mobilized after dissolution from nearby mortar joints, or iron, released by leaching from iron-bearing
minerals, reprecipitated according to pH fluctuations. Gypsum layers were rarely observed. Generally, composition of
the weathering crusts and patinas of Euganean trachyte proves to be an informative marker for the relevant environmental
conditions and their evolution

Germinario, Luigi

Siegesmund, Siegfried

Maritan, Lara

Simon, Klaus

Mazzoli, Claudio

GEO-LEOe-docs

Trachyte weathering in the urban built environment related to air quality

Decay of trachyte used as building stone in urban environment was investigated through the analysis of crusts and patinas found on trachyte of the Euganean Hills in the Renaissance city walls of Padua, northeastern Italy. Mineralogical and microstructural characteristics of the alteration products, as well as major- and trace-element chemical composition, were determined by optical microscopy, SEM–EDS and X-ray mapping, XRPD, and LA-ICPMS. The results are discussed referring to environmental parameters, in particular concerning air quality and anthropic pollution
sources. The influence of composition of the stone and other neighboring materials on specific weathering processes is also debated. The formation of crusts and patinas turns out to be mainly due to exogenous processes. Enrichment in heavy metals and carbonaceous matter derives from the deposition of particulate emitted during fuel combustion by road vehicles, domestic heating and, secondarily, industrial activities. The particulate is typically cemented by calcite, mainly mobilized after dissolution from nearby mortar joints, or iron, released by leaching from iron-bearing minerals, reprecipitated according to pH fluctuations. Gypsum layers were rarely observed. Generally, composition of the weathering crusts and patinas of Euganean trachyte proves to be an informative marker for the relevant environmental conditions and their evolution

Archivio istituzionale della ricerca - Università di Padova

Abstract Decay of trachyte used as building stone in urban environment was investigated through the analysis of crusts and patinas found on trachyte of the Euganean Hills in the Renaissance city walls of Padua, northeastern Italy. Mineralogical and microstructural characteristics of the alteration products, as well as major- and trace-element chemical composition, were determined by optical microscopy, SEM–EDS and X-ray mapping, XRPD, and LA-ICPMS. The results are discussed referring to environmental parameters, in particular concerning air quality and anthropic pollution sources. The influence of composition of the stone and other neighboring materials on specific weathering processes is also debated. The formation of crusts and patinas turns out to be mainly due to exogenous processes. Enrichment in heavy metals and carbonaceous matter derives from the deposition of particulate emitted during fuel combustion by road vehicles, domestic heating and, secondarily, industrial activities. The particulate is typically cemented by calcite, mainly mobilized after dissolution from nearby mortar joints, or iron, released by leaching from iron-bearing minerals, reprecipitated according to pH fluctuations. Gypsum layers were rarely observed. Generally, composition of the weathering crusts and patinas of Euganean trachyte proves to be an informative marker for the relevant environmental conditions and their evolution

Luigi Germinario

Siegfried Siegesmund

Lara Maritan

Klaus Simon

Claudio Mazzoli

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https://figshare.com/articles/MOESM1_of_Trachyte_weathering_in_the_urban_built_environment_related_to_air_quality/5549806

MOESM1 of Trachyte weathering in the urban built environment related to air quality

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Archivio istituzionale della ricerca - Università di Padova

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