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Effects of a constructional intervention on airborne and deposited particulate matter in the Portuguese National Tile Museum, Lisbon
Authors:Willemien Anaf  Benjamin Horemans  Teresa I. Madeira  M. Luisa Carvalho  Karolien De Wael  René Van Grieken
Affiliation:1. Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610, Antwerp, Belgium
2. Centro de Física Atómica, University of Lisbon, Av. Prof. Gama Pinto 2, 1649-003, Lisbon, Portugal
Abstract:In the 1970s, a large ambulatory of the National Tile Museum, Lisbon, was closed with glass panes on both ground and first floor. Although this design was meant to protect the museum collection from ambient air pollutants, small openings between the glass panes remain, creating a semi-enclosed corridor. The effects of the glass panes on the indoor air quality were evaluated in a comparative study by monitoring the airborne particle concentration and the extent of particle deposition at the enclosed corridor as well as inside the museum building. Comparison of the indoor/outdoor ratio of airborne particle concentration demonstrated a high natural ventilation rate in the enclosed corridor as well as inside the museum building. PM10 deposition velocities on vertical surfaces were estimated in the order of 3?×?10?4 m s?1 for both indoor locations. Also, the deposition rates of dark-coloured and black particles in specific were very similar at both indoor locations, causing visual degradation. The effectiveness of the glass panes in protecting the museum collection is discussed.
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