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Potential health impact of ultrafine particles under clean and polluted urban atmospheric conditions: a model-based study

The main goal of this study was to improve the knowledge of ultrafine particle number distributions in large urban areas and also to call the attention to the importance of these particles on assessing health risks. Measurements of aerosol size distributions were performed during 2 weeks, with disti...

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Autores principales: Martins, Leila Droprinchinski, Martins, Jorge A., Freitas, Edmilson D., Mazzoli, Caroline R., Gonçalves, Fabio Luiz T., Ynoue, Rita Y., Hallak, Ricardo, Albuquerque, Taciana Toledo A., Andrade, Maria de Fatima
Formato: Texto
Lenguaje:English
Publicado: Springer Netherlands 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2844959/
https://www.ncbi.nlm.nih.gov/pubmed/20376166
http://dx.doi.org/10.1007/s11869-009-0048-9
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author Martins, Leila Droprinchinski
Martins, Jorge A.
Freitas, Edmilson D.
Mazzoli, Caroline R.
Gonçalves, Fabio Luiz T.
Ynoue, Rita Y.
Hallak, Ricardo
Albuquerque, Taciana Toledo A.
Andrade, Maria de Fatima
author_facet Martins, Leila Droprinchinski
Martins, Jorge A.
Freitas, Edmilson D.
Mazzoli, Caroline R.
Gonçalves, Fabio Luiz T.
Ynoue, Rita Y.
Hallak, Ricardo
Albuquerque, Taciana Toledo A.
Andrade, Maria de Fatima
author_sort Martins, Leila Droprinchinski
collection PubMed
description The main goal of this study was to improve the knowledge of ultrafine particle number distributions in large urban areas and also to call the attention to the importance of these particles on assessing health risks. Measurements of aerosol size distributions were performed during 2 weeks, with distinct pollutant concentrations (polluted and clean periods), on the rooftop of a building located in downtown of the megacity of São Paulo, Brazil. CO, NO(2), PM(10), SO(2), and O(3) concentrations and meteorological variables were also used. Aerosol size distribution measurements showed that geometric mean diameters of the size spectra in the polluted period are on average considerably larger than those in the clean one. Besides the fact that total number of ultrafine particles did not show significant differences, during the polluted period, geometric mean diameter was larger than during the clean one. The results of a mathematical model of particle deposition on human respiratory tract indicated a more significant effect of smaller particles fraction of the spectra, which predominate under clean atmospheric conditions. The results also indicated that urban environmental conditions usually considered good for air quality, under the criteria of low mass concentration, do not properly serve as air quality standard to very small particles. In the size range of ultrafine particles, this traditional clean atmospheric condition can offer a strong risk to pulmonary hazards, since the cleansing of the atmosphere creates good conditions to increase the concentration of nucleation mode particles.
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spelling pubmed-28449592010-04-05 Potential health impact of ultrafine particles under clean and polluted urban atmospheric conditions: a model-based study Martins, Leila Droprinchinski Martins, Jorge A. Freitas, Edmilson D. Mazzoli, Caroline R. Gonçalves, Fabio Luiz T. Ynoue, Rita Y. Hallak, Ricardo Albuquerque, Taciana Toledo A. Andrade, Maria de Fatima Air Qual Atmos Health Original Paper The main goal of this study was to improve the knowledge of ultrafine particle number distributions in large urban areas and also to call the attention to the importance of these particles on assessing health risks. Measurements of aerosol size distributions were performed during 2 weeks, with distinct pollutant concentrations (polluted and clean periods), on the rooftop of a building located in downtown of the megacity of São Paulo, Brazil. CO, NO(2), PM(10), SO(2), and O(3) concentrations and meteorological variables were also used. Aerosol size distribution measurements showed that geometric mean diameters of the size spectra in the polluted period are on average considerably larger than those in the clean one. Besides the fact that total number of ultrafine particles did not show significant differences, during the polluted period, geometric mean diameter was larger than during the clean one. The results of a mathematical model of particle deposition on human respiratory tract indicated a more significant effect of smaller particles fraction of the spectra, which predominate under clean atmospheric conditions. The results also indicated that urban environmental conditions usually considered good for air quality, under the criteria of low mass concentration, do not properly serve as air quality standard to very small particles. In the size range of ultrafine particles, this traditional clean atmospheric condition can offer a strong risk to pulmonary hazards, since the cleansing of the atmosphere creates good conditions to increase the concentration of nucleation mode particles. Springer Netherlands 2009-08-04 2010 /pmc/articles/PMC2844959/ /pubmed/20376166 http://dx.doi.org/10.1007/s11869-009-0048-9 Text en © Springer Science+Business Media B.V. 2009 https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
spellingShingle Original Paper
Martins, Leila Droprinchinski
Martins, Jorge A.
Freitas, Edmilson D.
Mazzoli, Caroline R.
Gonçalves, Fabio Luiz T.
Ynoue, Rita Y.
Hallak, Ricardo
Albuquerque, Taciana Toledo A.
Andrade, Maria de Fatima
Potential health impact of ultrafine particles under clean and polluted urban atmospheric conditions: a model-based study
title Potential health impact of ultrafine particles under clean and polluted urban atmospheric conditions: a model-based study
title_full Potential health impact of ultrafine particles under clean and polluted urban atmospheric conditions: a model-based study
title_fullStr Potential health impact of ultrafine particles under clean and polluted urban atmospheric conditions: a model-based study
title_full_unstemmed Potential health impact of ultrafine particles under clean and polluted urban atmospheric conditions: a model-based study
title_short Potential health impact of ultrafine particles under clean and polluted urban atmospheric conditions: a model-based study
title_sort potential health impact of ultrafine particles under clean and polluted urban atmospheric conditions: a model-based study
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2844959/
https://www.ncbi.nlm.nih.gov/pubmed/20376166
http://dx.doi.org/10.1007/s11869-009-0048-9
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