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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...
Autores principales: | , , , , , , , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
Springer Netherlands
2009
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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. |
format | Text |
id | pubmed-2844959 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2009 |
publisher | Springer Netherlands |
record_format | MEDLINE/PubMed |
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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