Scanning electron microscope and statistical analysis of suspended heavy metal particles in San Luis Potosi, Mexico

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Show simple item record Pina, AA Villasenor, GT Fernandez, MM Kudra, AL Ramos, RL 2011-01-22T10:27:31Z 2011-01-22T10:27:31Z 2000
dc.identifier.issn 1352-2310
dc.description.abstract Three hundred samples of urban aerosol were collected in high-volume samplers from five urban locations situated near an important metallurgical plant in the city of San Luis Potosi, Mexico. Whole samples were analyzed by atomic absorption (AA) for Pb, Cd, As, Cu, Ni, Fe and Cr. One hundred eighty of these samples were subjected to X-ray microanalysis (EDS) coupled with a scanning electron microscope to classify individual particles according to their chemical or mineralogical composition. The principal component analysis (PCA) obtained from the bulk sample analysis, and X-ray microanalysis from individual particles, confirmed chemical associations among elements directly and indirectly. PCA from bulk assays made the most effective use of X-ray microanalysis to characterize major particle types. Some chemical associations would be difficult to detect using microanalysis, alone, for example, in anthropogenic complex phases. In this work, the combined use of microanalysis and statistical methods permitted identification of associations among elements. We observed an association of Pb-As-Cd and Fe-Mn among the samples. In a second order, Pb-Fe, Pb-Mn, Fe-As, Fe-Cd, Cd-Mn and As-Mn showed a lower association. Only Ni and Cu appeared unassociated with any other element analyzed by AA. We characterized the mineral phases by size range, morphology and chemical composition using SEM-EDS to obtain a compositional approach of anthropogenic phases and peculiar morphology and size. A high percentage of heavy metal particles smaller than 2 mu m were detected. (C) 2000 Elsevier Science Ltd. All rights reserved. en_US
dc.language.iso en en_US
dc.title Scanning electron microscope and statistical analysis of suspended heavy metal particles in San Luis Potosi, Mexico en_US
dc.type Article en_US
dc.identifier.idprometeo 2475
dc.source.novolpages 34(24):4103-4112
dc.subject.wos Environmental Sciences
dc.subject.wos Meteorology & Atmospheric Sciences
dc.description.index WoS: SCI, SSCI o AHCI
dc.subject.keywords atmospheric aerosol
dc.subject.keywords single-particle analysis
dc.subject.keywords electron microprobe
dc.subject.keywords principal component analysis
dc.subject.keywords size distributions
dc.subject.keywords metallurgy
dc.relation.journal Atmospheric Environment

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