A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient Air
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s11270-021-05031-4 http://hdl.handle.net/11449/208416 |
Resumo: | The lockdown to prevent the coronavirus spread resulted in an immediate reduction in gas concentration worldwide. This fact shows the importance of nitrogen dioxide as a pollutant gas directly associated with human activities. For indoor exposure, NO2 has been associated with effects on the respiratory system. In outdoor environments, ozone reaches a maximum after NO2 peaks, and acid rain arises with NO2 oxidation to forms nitric acid. Therefore, monitoring the NO2 concentration in atmospheric air can help prevent respiratory diseases and lower the concentration of other atmospheric pollutants. The experiment proposed in this article uses a low-cost passive sampler for the NO2 collection. An innovative and straightforward technique to determine the gas concentration through a gel-dyed formation and based on digital image analysis RGB colors channel are split by the software ImageJ. Results of digital image analysis and spectrophotometry were statistically agreed at a 95% confidence level. The advantages of the technique include low cost, the ready availability of components, ease of use, and sensitivity. The achievable resolution of nitrogen dioxide concentrations is 9 ppb for 24-h sampling. |
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Repositório Institucional da UNESP |
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A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient AirAir pollutionAir qualityColorimetryDigital image analysisNO2 monitoringPassive samplingThe lockdown to prevent the coronavirus spread resulted in an immediate reduction in gas concentration worldwide. This fact shows the importance of nitrogen dioxide as a pollutant gas directly associated with human activities. For indoor exposure, NO2 has been associated with effects on the respiratory system. In outdoor environments, ozone reaches a maximum after NO2 peaks, and acid rain arises with NO2 oxidation to forms nitric acid. Therefore, monitoring the NO2 concentration in atmospheric air can help prevent respiratory diseases and lower the concentration of other atmospheric pollutants. The experiment proposed in this article uses a low-cost passive sampler for the NO2 collection. An innovative and straightforward technique to determine the gas concentration through a gel-dyed formation and based on digital image analysis RGB colors channel are split by the software ImageJ. Results of digital image analysis and spectrophotometry were statistically agreed at a 95% confidence level. The advantages of the technique include low cost, the ready availability of components, ease of use, and sensitivity. The achievable resolution of nitrogen dioxide concentrations is 9 ppb for 24-h sampling.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Department of Analytical Chemistry São Paulo State University UNESPDepartment of Analytical Chemistry São Paulo State University UNESPCNPq: 310065/2016-0CNPq: 481505/2013-0Universidade Estadual Paulista (Unesp)de França Souza, Pedro Augusto [UNESP]Araújo Neto, José Lozano [UNESP]Cardoso, Arnaldo Alves [UNESP]2021-06-25T11:11:50Z2021-06-25T11:11:50Z2021-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/s11270-021-05031-4Water, Air, and Soil Pollution, v. 232, n. 2, 2021.1573-29320049-6979http://hdl.handle.net/11449/20841610.1007/s11270-021-05031-42-s2.0-85101005980Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengWater, Air, and Soil Pollutioninfo:eu-repo/semantics/openAccess2021-11-16T17:44:44Zoai:repositorio.unesp.br:11449/208416Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-11-16T17:44:44Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient Air |
title |
A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient Air |
spellingShingle |
A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient Air de França Souza, Pedro Augusto [UNESP] Air pollution Air quality Colorimetry Digital image analysis NO2 monitoring Passive sampling |
title_short |
A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient Air |
title_full |
A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient Air |
title_fullStr |
A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient Air |
title_full_unstemmed |
A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient Air |
title_sort |
A Simple Technique Based on Digital Images for Determination of Nitrogen Dioxide in Ambient Air |
author |
de França Souza, Pedro Augusto [UNESP] |
author_facet |
de França Souza, Pedro Augusto [UNESP] Araújo Neto, José Lozano [UNESP] Cardoso, Arnaldo Alves [UNESP] |
author_role |
author |
author2 |
Araújo Neto, José Lozano [UNESP] Cardoso, Arnaldo Alves [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
de França Souza, Pedro Augusto [UNESP] Araújo Neto, José Lozano [UNESP] Cardoso, Arnaldo Alves [UNESP] |
dc.subject.por.fl_str_mv |
Air pollution Air quality Colorimetry Digital image analysis NO2 monitoring Passive sampling |
topic |
Air pollution Air quality Colorimetry Digital image analysis NO2 monitoring Passive sampling |
description |
The lockdown to prevent the coronavirus spread resulted in an immediate reduction in gas concentration worldwide. This fact shows the importance of nitrogen dioxide as a pollutant gas directly associated with human activities. For indoor exposure, NO2 has been associated with effects on the respiratory system. In outdoor environments, ozone reaches a maximum after NO2 peaks, and acid rain arises with NO2 oxidation to forms nitric acid. Therefore, monitoring the NO2 concentration in atmospheric air can help prevent respiratory diseases and lower the concentration of other atmospheric pollutants. The experiment proposed in this article uses a low-cost passive sampler for the NO2 collection. An innovative and straightforward technique to determine the gas concentration through a gel-dyed formation and based on digital image analysis RGB colors channel are split by the software ImageJ. Results of digital image analysis and spectrophotometry were statistically agreed at a 95% confidence level. The advantages of the technique include low cost, the ready availability of components, ease of use, and sensitivity. The achievable resolution of nitrogen dioxide concentrations is 9 ppb for 24-h sampling. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T11:11:50Z 2021-06-25T11:11:50Z 2021-02-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s11270-021-05031-4 Water, Air, and Soil Pollution, v. 232, n. 2, 2021. 1573-2932 0049-6979 http://hdl.handle.net/11449/208416 10.1007/s11270-021-05031-4 2-s2.0-85101005980 |
url |
http://dx.doi.org/10.1007/s11270-021-05031-4 http://hdl.handle.net/11449/208416 |
identifier_str_mv |
Water, Air, and Soil Pollution, v. 232, n. 2, 2021. 1573-2932 0049-6979 10.1007/s11270-021-05031-4 2-s2.0-85101005980 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Water, Air, and Soil Pollution |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803649569053999104 |