Measuring air quality with low-cost sensors in citizen science applications

Detalhes bibliográficos
Autor(a) principal: Martins, Jana Lodi
Data de Publicação: 2017
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/34459
Resumo: Dissertation submitted in partial fulfilment of the requirements for the degree of Master of Science in Geospatial Technologies
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spelling Measuring air quality with low-cost sensors in citizen science applicationsAir pollutionPublic health emergencyDissertation submitted in partial fulfilment of the requirements for the degree of Master of Science in Geospatial TechnologiesAir pollution is unquestionably a public health emergency, and the rates of pollution continue to rise at an alarming rate in cities all over the world. Nevertheless, the traditional monitoring equipment is very expensive, and the available measurements are not sufficient to precisely classify air quality in several locations in a city. Recent advancements in air quality measuring technology provide a potential opportunity to increase the air quality data, and to raise public awareness of health issues arising from air pollution. This study focuses on the development and evaluation of a new prototype for the monitoring of fine particulate matter (PM2.5). It describes the design approach and the evaluation methods, in which a series of field experiments were conducted to evaluate the performance of the prototype and of a commercial low-cost device in comparison with a reference monitor. The results showed that the prototype presented a good performance in environments with a high variation of particle concentrations (variations above 100μg/m³), such as cooking-environments and exposure to cigarette smoke, for most of the experiments (R² = 0.55-0.85). However, their agreement was very poor in environments without high variability of particle concentrations. The performance comparison between identical sensors purchased in the same year revealed a very high agreement (R² = 0.92), but prototypes which utilized sensors acquired in different years presented a very weak correlation in most of the experiments. The analysis of the commercial low-cost device’s performance revealed a moderate to strong linear correlation with the reference monitor in all the experiments (R= 0.51-0.93); this study also demonstrates that the maximum limit of detection of the device was much lower than the value given by the manufacturer (approximately 180μg/m³, in contrast to the value of 400μg/m³). For applications of real-time measurements, the prototype developed in this research may be especially utilized as indicative of PM2.5 hotspots and trends in ambient conditions, primarily in residences, monitoring the frequency and duration of high exposure events, such as cooking, smoking, and biomass burning. Nevertheless, this research demonstrates the necessity for individual sensor performance testing prior to field use, and that presumptions about the representativeness of measurements of PM2.5 carried out by low-cost sensors should be made with caution.Bartoschek, ThomasHenriques, Roberto André PereiraCasteleyn, SvenRUNMartins, Jana Lodi2018-04-13T14:01:18Z2017-03-032017-03-03T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/34459TID:201898225enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-10T15:43:27ZPortal AgregadorONG
dc.title.none.fl_str_mv Measuring air quality with low-cost sensors in citizen science applications
title Measuring air quality with low-cost sensors in citizen science applications
spellingShingle Measuring air quality with low-cost sensors in citizen science applications
Martins, Jana Lodi
Air pollution
Public health emergency
title_short Measuring air quality with low-cost sensors in citizen science applications
title_full Measuring air quality with low-cost sensors in citizen science applications
title_fullStr Measuring air quality with low-cost sensors in citizen science applications
title_full_unstemmed Measuring air quality with low-cost sensors in citizen science applications
title_sort Measuring air quality with low-cost sensors in citizen science applications
author Martins, Jana Lodi
author_facet Martins, Jana Lodi
author_role author
dc.contributor.none.fl_str_mv Bartoschek, Thomas
Henriques, Roberto André Pereira
Casteleyn, Sven
RUN
dc.contributor.author.fl_str_mv Martins, Jana Lodi
dc.subject.por.fl_str_mv Air pollution
Public health emergency
topic Air pollution
Public health emergency
description Dissertation submitted in partial fulfilment of the requirements for the degree of Master of Science in Geospatial Technologies
publishDate 2017
dc.date.none.fl_str_mv 2017-03-03
2017-03-03T00:00:00Z
2018-04-13T14:01:18Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/34459
TID:201898225
url http://hdl.handle.net/10362/34459
identifier_str_mv TID:201898225
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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