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Title	Application Of Low-Cost Sensors In Stationary And Mobile Nodes For Urban Air Quality Index Monitoring †
ID_Doc	9926
Authors	Penza M.; Pfister V.; Suriano D.; Dipinto S.; Prato M.; Cassano G.
Year	2023
Published	Engineering Proceedings, 48, 1
DOI	http://dx.doi.org/10.3390/CSAC2023-14881
Abstract	The air quality in modern cities and urban areas is strongly affected by chemical pollutants such as toxic gases, volatile organic compounds, and particulate matter. They are monitored by governmental agencies using regulatory monitoring stations, which are highly accurate, but also very expensive, bulky, and maintenance demanding. There is a compulsory need to monitor air quality at high spatial–temporal resolution in smart cities for public health protection and environmental sustainability. Properly calibrated low-cost and low-accuracy sensors are usually deployed in stationary and mobile nodes for urban air quality monitoring. A simple indicator of the current status of urban air pollution is the Air Quality Index (AQI) used to communicate the pollution level under the time-changing trend of a specific pollutant. In this study, continuous measurements have been performed in the city of Bari (southern Italy) by electrochemical gas sensors (NO2, O3, CO), optical particle counters (OPC) for particulate matter (PM10), and NDIR infrared sensors (CO2), including microsensors for temperature and relative humidity. The sensors have been installed in stationary nodes located in urban sites and in a mobile node mounted on a public bus moving on urban routes. AQI data gathered by the low-cost sensors have been compared with reference instrumentations as a case study of citizen science. © 2023 by the authors.
Author Keywords	air quality index; air quality monitoring; low-cost air quality sensors; portable devices

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