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Wood burning pollution in southern Chile: PM2.5 source apportionment using CMB and molecular markers (2017)

Publicación del investigador Héctor Jorquera en Environmental Pollution.

Posteado por Por Gianitsa Corral Fecha 3 de Julio, 2017

Title

Wood burning pollution in southern Chile: PM2.5 source apportionment using CMB and molecular markers (2017)

Publication Type

Journal Article

Year of Publication

2017

Authors

A. Villalobosa; F. Barraza; H. Jorquera; J. Schauer

Journal Title

Environmental Pollution

Keywords

Source apportionmentWood burningCMB-MMSouthern ChileFuel poverty; Sustainable urban development

Abstract

Temuco is a mid-size city representative of severe wood smoke pollution in southern Chile; i.e., ambient 24-h PM2.5 concentrations have exceeded 150 μg/m3 in the winter season and the top concentration reached 372 μg/m3 in 2010. Annual mean concentrations have decreased but are still above 30 μg/m3. For the very first time, a molecular marker source apportionment of ambient organic carbon (OC) and PM2.5 was conducted in Temuco. Primary resolved sources for PM2.5 were wood smoke (37.5%), coal combustion (4.4%), diesel vehicles (3.3%), dust (2.2%) and vegetative detritus (0.7%). Secondary inorganic PM2.5 (sulfates, nitrates and ammonium) contributed 4.8% and unresolved organic aerosols (generated from volatile emissions from incomplete wood combustion), including secondary organic aerosols, contributed 47.1%. Adding the contributions of unresolved organic aerosols to those from primary wood smoke implies that wood burning is responsible for 84.6% of the ambient PM2.5 in Temuco. This predominance of wood smoke is ultimately due to widespread poverty and a lack of efficient household heating methods. The government has been implementing emission abatement policies but achieving compliance with ambient air quality standards for PM2.5 in southern Chile remains a challenge.

DOI

https://doi.org/10.1016/j.envpol.2017.02.069

Corresponding Author

 Héctor Jorquera, jorquera@ing.puc.cl

Line (s) of Research

Critical Resources; Access and Mobility

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