Source apportionment of PM10 and PM2.5 at Tocopilla, Chile (22A degrees 05' S, 70A degrees 12' W)

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dc.contributor.authorJorquera, Hector
dc.date.accessioned2024-01-10T12:08:44Z
dc.date.available2024-01-10T12:08:44Z
dc.date.issued2009
dc.description.abstractTocopilla is located on the coast of Northern Chile, within an arid region that extends from 30A degrees S to the border with PerA(o). The major industrial activities are related to the copper mining industry. A measurement campaign was conducted during March and April 2006 to determine ambient PM10 and PM2.5 concentrations in the city. The results showed significantly higher PM10 concentrations in the southern part of the city (117 mu g/m(3)) compared with 79 and 80 (mu g/m(3)) in the central and northern sites. By contrast, ambient PM2.5 concentrations had a more uniform spatial distribution across the city, around 20 (mu g/m(3)). In order to conduct a source apportionment, daily PM10 and PM2.5 samples were analyzed for elements by XRF. EPA's Positive Matrix Factorization software was used to interpret the results of the chemical compositions. The major source contributing to PM2.5 at sites 1, 2 and 3, respectively are: (a) sulfates, with similar to 50% of PM2.5 concentrations at the three sites; (b) fugitive emissions from fertilizer storage and handling, with 16%, 21% and 10%; (c) Coal and residual oil combustion, with 15%, 15% and 4%; (d) Sea salt, 5%, 6% and 16%; (e) Copper ore processing, 4%, 5% and 15%; and (f) a mixed dust source with 11%, 7% and 4%. Results for PM10-at sites 1, 2 and 3, respectively-show that the major contributors are: (a) sea salt source with 36%, 32% and 36% of the PM10 concentration; (b) copper processing emissions mixed with airborne soil dust with 6.6%, 11.5% and 41%; (c) sulfates with 31%, 31% and 12%; (d) a mixed dust source with 16%, 12% and 10%, and (e) the fertilizer stockpile emissions, with 11%, 14% and 2% of the PM10 concentration. The high natural background of PM10 implies that major reductions in anthropogenic emissions of PM10 and SO2 would be required to attain ambient air quality standards for PM10; those reductions would curb down ambient PM2.5 concentrations as well.
dc.description.funderRegional Government of Chile's II Region
dc.fechaingreso.objetodigital2024-03-21
dc.format.extent17 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10661-008-0352-0
dc.identifier.issn0167-6369
dc.identifier.pubmedidMEDLINE:18512124
dc.identifier.urihttps://doi.org/10.1007/s10661-008-0352-0
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76422
dc.identifier.wosidWOS:000265917200021
dc.information.autorucIngeniería;Jorquera H;S/I;100302
dc.issue.numero1-4
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final251
dc.pagina.inicio235
dc.publisherSPRINGER
dc.revistaENVIRONMENTAL MONITORING AND ASSESSMENT
dc.rightsacceso restringido
dc.subjectSource apportionment
dc.subjectSulfates
dc.subjectSea salt
dc.subjectSoil dust
dc.subjectArid region
dc.subjectPositive matrix factorization
dc.subjectSuspended particulate matter
dc.subjectAmbient monitoring
dc.subjectPOSITIVE MATRIX FACTORIZATION
dc.subjectAEROSOL
dc.subjectMODELS
dc.subject.ods13 Climate Action
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa13 Acción por el clima
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleSource apportionment of PM10 and PM2.5 at Tocopilla, Chile (22A degrees 05' S, 70A degrees 12' W)
dc.typeartículo
dc.volumen153
sipa.codpersvinculados100302
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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