AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
Indoor PM2.5 at Santiago, Chile, 2012
HECTOR JORQUERA, Francisco Barraza, Pontificia Universidad Catolica de Chile
Abstract Number: 199 Working Group: Indoor Aerosols
Abstract A simultaneous indoor and outdoor PM$_(2.5) campaign has been carried out at Santiago, Chile between mid-October and mid-December, 2012. Paired Partisol 2000i samplers (Thermo Scientific, USA, 16.67 L/min) were deployed on a building roof at Downtown Santiago, measuring urban background PM$_(2.5) concentrations in 24-h integrated filter samples. In the same period, paired TAS Minivol samplers (Airmetrics, Eugene OR, USA, 5 L/min) were used to sample indoor PM$_(2.5) concentrations for 48-h integrated filter samples. Paired samplers used teflon and quartz filters for measuring total and trace elemental masses and EC/OC and biological components (proteins, carbohydrates and endotoxins), respectively. A total of 47 households were analyzed in the campaign, that included three socioeconomic statuses. A household survey and continuous measurements of indoor temperature, relative humidity and carbon dioxide concentrations were carried out as well.
Average indoor/outdoor PM$_(2.5) ratios had a mean and standard deviation of 1.1 and 0.4, respectively, with no significant differences across socioeconomic strata. Average PM$_(2.5) concentrations were 23.9 and 21.7 micro-g/m$^3 for indoor and outdoor samples, respectively. We present a multivariate analysis of the database to explain indoor PM$_(2.5) variability in terms of outdoor PM$_(2.5) and household features. Receptor model results for outdoor and indoor PM$_(2.5) samples are discussed as well.