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Chemical composition and source apportionment of PM10 at an urban background site in a high-altitude Latin American megacity (Bogota, Colombia).
Environ Pollut 2018; 233:142-155EP

Abstract

Bogota registers frequent episodes of poor air quality from high PM10 concentrations. It is one of the main Latin American megacities, located at 2600 m in the tropical Andes, but there is insufficient data on PM10 source contribution. A characterization of the chemical composition and the source apportionment of PM10 at an urban background site in Bogota was carried out in this study. Daily samples were collected from June 2015 to May 2016 (a total of 311 samples). Organic carbon (OC), elemental carbon (EC), water soluble compounds (SO42-, Cl-, NO3-, NH4+), major elements (Al, Fe, Mg, Ca, Na, K, P) and trace metals (V, Cd, Pb, Sr, Ba, among others) were analyzed. The results were interpreted in terms of their variability during the rainy season (RS) and the dry season (DS). The data obtained revealed that the carbonaceous fraction (∼51%) and mineral dust (23%) were the main PM10 components, followed by others (15%), Secondary Inorganic Compounds (SIC) (11%) and sea salt (0.4%). The average concentrations of soil, SIC and OC were higher during RS than DS. However, peak values were observed during the DS due to photochemical activity and forest fires. Although trace metals represented <1% of PM10, high concentrations of toxic elements such as Pb and Sb on RS, and Cu on DS, were obtained. By using a PMF model, six factors were identified (∼96% PM10) including fugitive dust, road dust, metal processing, secondary PM, vehicles exhaust and industrial emissions. Traffic (exhaust emissions + road dust) was the major PM10 source, accounting for ∼50% of the PM10. The results provided novel data about PM10 chemical composition, its sources and its seasonal variability during the year, which can help the local government to define control strategies for the main emission sources during the most critical periods.

Authors+Show Affiliations

Associate Unit CSIC-University of Huelva "Atmospheric Pollution", Centre for Research in Sustainable Chemistry-CIQSO, Campus de El Carmen s/n, 21071, Huelva, Spain; Environmental Engineering Program, Group of Applied Environmental Studies-GEAA, Universidad Nacional Abierta y a Distancia-UNAD, Tv 31 #12-38 sur, Bogota, Colombia. Electronic address: omar.ramirez@unad.edu.co.Associate Unit CSIC-University of Huelva "Atmospheric Pollution", Centre for Research in Sustainable Chemistry-CIQSO, Campus de El Carmen s/n, 21071, Huelva, Spain.Institute for Environmental Assessment and Water Research (IDÆA), Spanish National Research Council (CSIC), C/Jordi Girona 18-26, Barcelona, Spain.Environmental Engineering Program, Universidad Libre, Cr. 70A # 53-40, Bogota, Colombia.Department of Chemical and Environmental Engineering, Universidad Nacional de Colombia, Cr. 30 # 45-03, Edif. 412, Of. 206. Bogota, Colombia.Associate Unit CSIC-University of Huelva "Atmospheric Pollution", Centre for Research in Sustainable Chemistry-CIQSO, Campus de El Carmen s/n, 21071, Huelva, Spain.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29059629

Citation

Ramírez, Omar, et al. "Chemical Composition and Source Apportionment of PM10 at an Urban Background Site in a High-altitude Latin American Megacity (Bogota, Colombia)." Environmental Pollution (Barking, Essex : 1987), vol. 233, 2018, pp. 142-155.
Ramírez O, Sánchez de la Campa AM, Amato F, et al. Chemical composition and source apportionment of PM10 at an urban background site in a high-altitude Latin American megacity (Bogota, Colombia). Environ Pollut. 2018;233:142-155.
Ramírez, O., Sánchez de la Campa, A. M., Amato, F., Catacolí, R. A., Rojas, N. Y., & de la Rosa, J. (2018). Chemical composition and source apportionment of PM10 at an urban background site in a high-altitude Latin American megacity (Bogota, Colombia). Environmental Pollution (Barking, Essex : 1987), 233, pp. 142-155. doi:10.1016/j.envpol.2017.10.045.
Ramírez O, et al. Chemical Composition and Source Apportionment of PM10 at an Urban Background Site in a High-altitude Latin American Megacity (Bogota, Colombia). Environ Pollut. 2018;233:142-155. PubMed PMID: 29059629.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chemical composition and source apportionment of PM10 at an urban background site in a high-altitude Latin American megacity (Bogota, Colombia). AU - Ramírez,Omar, AU - Sánchez de la Campa,A M, AU - Amato,Fulvio, AU - Catacolí,Ruth A, AU - Rojas,Néstor Y, AU - de la Rosa,Jesús, Y1 - 2017/10/20/ PY - 2017/06/17/received PY - 2017/10/10/revised PY - 2017/10/12/accepted PY - 2017/10/24/pubmed PY - 2018/4/13/medline PY - 2017/10/24/entrez KW - Chemical composition KW - Megacities KW - PM(10) KW - PMF KW - Source apportionment SP - 142 EP - 155 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ. Pollut. VL - 233 N2 - Bogota registers frequent episodes of poor air quality from high PM10 concentrations. It is one of the main Latin American megacities, located at 2600 m in the tropical Andes, but there is insufficient data on PM10 source contribution. A characterization of the chemical composition and the source apportionment of PM10 at an urban background site in Bogota was carried out in this study. Daily samples were collected from June 2015 to May 2016 (a total of 311 samples). Organic carbon (OC), elemental carbon (EC), water soluble compounds (SO42-, Cl-, NO3-, NH4+), major elements (Al, Fe, Mg, Ca, Na, K, P) and trace metals (V, Cd, Pb, Sr, Ba, among others) were analyzed. The results were interpreted in terms of their variability during the rainy season (RS) and the dry season (DS). The data obtained revealed that the carbonaceous fraction (∼51%) and mineral dust (23%) were the main PM10 components, followed by others (15%), Secondary Inorganic Compounds (SIC) (11%) and sea salt (0.4%). The average concentrations of soil, SIC and OC were higher during RS than DS. However, peak values were observed during the DS due to photochemical activity and forest fires. Although trace metals represented <1% of PM10, high concentrations of toxic elements such as Pb and Sb on RS, and Cu on DS, were obtained. By using a PMF model, six factors were identified (∼96% PM10) including fugitive dust, road dust, metal processing, secondary PM, vehicles exhaust and industrial emissions. Traffic (exhaust emissions + road dust) was the major PM10 source, accounting for ∼50% of the PM10. The results provided novel data about PM10 chemical composition, its sources and its seasonal variability during the year, which can help the local government to define control strategies for the main emission sources during the most critical periods. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/29059629/Chemical_composition_and_source_apportionment_of_PM10_at_an_urban_background_site_in_a_high_altitude_Latin_American_megacity__Bogota_Colombia__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(17)32543-5 DB - PRIME DP - Unbound Medicine ER -