Characterization of Particulate Matter, Ions and OC/EC in a Museum in Shanghai, China

Abstract

The size-fractionated particle number concentrations were monitored continuously in the different exhibition halls of an enclosed museum, in Shanghai. Particles in different size bins were collected to investigate the main chemical compositions. Results indicated that the mass concentrations of coarse particles, fine particles and ultrafine particles were in the range of 20.50-24.38 μg/m 3 , 23.39-24.08 μg/m 3 and 16.02-17.48 μg/m 3 , respectively. In addition, the activities of cleaning and walking can greatly elevate the number concentration of coarse particles by a factor of about 8-172 times. The decay rates of size-fractionated particle increased with the enlarging particle diameter, ranging from 2 × 10 -5 to 8 × 10 -4 s -1 . The mass concentration of SO 4 2-, NO 3 -, NH 4 + peaked within the particle size range of 0.32-0.56 μm. 2+ and Ca 2+ occurred in the various size ranges. Total organic acids distributed uniformly, the acetate ion mass concentration was 1.238 μg/m 3 , which was higher than both formate ion and oxalate ion concentrations. The concentrations of OC and EC showed similar trends on both the National Day and working day, and greater OC/EC ratios were found in the particles within the size range less than 0.1 μm and larger than 1 μm.

Indoor Air Quality Assessment at the Library of the National Observatory of Athens, Greece

“…Enhanced levels of organic matter were also reported in other cultural heritage indoor environments (e.g., Cappitelli et al, 2009;Mascova et al, 2015). The predominant contribution of the sulfates, for the ionic components, is in agreement with findings at indoor cultural heritage environments (Cao et al, 2011;Xiu et al, 2015;Bartl et al, 2016;Uring et al, 2018); whereas, according to publications calcium-rich particles have been determined to dominate the indoor aerosol in museums depending on the wall material (Camuffo et al, 1999(Camuffo et al, , 2001 or restoration and construction works (Gysels et al, 2004), without excluding outdoor sources (Gysels et al, 2002). The same stands for outdoors despite the prevalence of dust relative to POM with 42.5% against 22.6%.…”

Physico-chemical characterization of urban aerosols from specific combustion sources in West Africaat Abidjan in Côte d’Ivoire and Cotonou in Benin in the frame of DACCIWA program

“…Results of the EC size distribution are very consistent among the different sites. Whatever the site and the season, higher EC concentrations are found in C and UF particles compared to F particles, with maximum values in UF particle as found in previous studies (Marinoni et al, 2005;Xiu et al, 2015). due to (1) decreases in EC wet deposition and concentration during the wet season and (2) the influence of long-range transport from sources such as biomass burning during the dry season.…”

Contribution of Visitors to the Indoor PM in the National Library in Prague, Czech Republic

“…Temporal variation of size resolved indoor and outdoor PM showed that main source of indoor coarse PM are visitors and fine PM infiltration from the outdoor environment (Chatoutsidou et al, 2015). Similar effect has been already described in several studies related to indoor air quality in museums (e.g., Camuffo et al, 1999;Worobiec et al, 2008;Wang et al, 2015;Xiu et al, 2015). Further, the time behavior of PM 10 concentrations measured in various parts of the hall by 3 DustTrak instrument showed that, for the purpose of modelling, the indoor environment can be considered as well mixed.…”