Indoor PM2.5 in an urban zone with heavy wood smoke pollution: The case of Temuco, Chile

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datacite.alternateIdentifier.citationEnvironmental Pollution, Vol.236, 477-487, 2018en_US
datacite.alternateIdentifier.doi10.1016/j.envpol.2018.01.085en_US
datacite.creatorJorquera, Héctor
datacite.creatorBarraza, Francisco
datacite.creatorHeyer, Johanna
datacite.creatorValdivia, Gonzalo
datacite.creatorSchiappacasse Poyanco, Luis
datacite.creatorMontoya, Lupita D.
datacite.date2018
datacite.subjectPoluciónen_US
datacite.subjectCalidad del aireen_US
datacite.subjectMaterial particuladoen_US
datacite.subjectContaminación intradomiciliariaen_US
datacite.titleIndoor PM2.5 in an urban zone with heavy wood smoke pollution: The case of Temuco, Chileen_US
dc.coverageTemucoen_US
dc.date.accessioned2019-12-18T18:25:13Z
dc.date.available2019-12-18T18:25:13Z
dc.description.abstractTemuco is a mid-size city representative of severe wood smoke pollution in southern Chile; however, little is known about the indoor air quality in this region. A field measurement campaign at 63 households in the Temuco urban area was conducted in winter 2014 and is reported here. In this study, indoor and outdoor (24-hr) PM2.5 and its elemental composition were measured and compared. Infiltration parameters and outdoor/indoor contributions to indoor PM2.5 were also determined. A statistical evaluation of how various air quality interventions and household features influence indoor PM2.5 was also performed. This study determined median indoor and outdoor PM2.5 concentrations of 44.4 and 41.8 μg/m3, respectively. An average infiltration factor (0.62 ± 0.06) was estimated using sulfur as a tracer species. Using a simple mass balance approach, median indoor and outdoor contributions to indoor PM2.5 concentrations were then estimated as 12.5 and 26.5 μg/m3, respectively; therefore, 68% of indoor PM2.5 comes from outdoor infiltration. This high percentage is due to high outdoor pollution and relatively high household air exchange rates (median: 1.06 h−1). This study found that S, Br and Rb were dominated by outdoor contributions, while Si, Ca, Ti, Fe and As originated from indoor sources. Using continuous indoor and outdoor PM2.5 measurements, a median indoor source strength of 75 μg PM2.5/min was estimated for the diurnal period, similar to literature results. For the evening period, the median estimate rose to 135 μg PM2.5/min, reflecting a more intense wood burning associated to cooking and space heating at night. Statistical test results (at the 90% confidence level) support the ongoing woodstove replacement program (reducing emissions) and household weatherization subsidies (reducing heating demand) for improving indoor air quality in southern Chile, and suggest that a cookstove improvement program might be helpful as well. In the city of Temuco, southern Chile, 68% of indoor PM2.5 comes from severe outdoor pollution due to intensive wood burning, enhanced by poor household building standards and fuel povertyen_US
dc.formatPDFen_US
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/2124
dc.language.isoenen_US
dc.sourceEnvironmental Pollutionen_US
oaire.resourceTypeArtículo de Revistaen_US
uct.catalogadorpopen_US
uct.indizacionISI - Science Citation Indexen_US
uct.indizacionSCOPUSen_US
uct.nucleosNúcleo en Energías Renovablesen_US
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