Air quality assessment based on a smart locally CO2 monitoring system with validation by a reference instrument

Author:

MBARNDOUKA Jacob Taamté1ORCID,signing Vitrice ruben Folifack1,Bobbo Modibo Oumar1,Noubé Michaux Kountchou1,Yerima Abba Hamadou1,Saïdou 2

Affiliation:

1. Research Centre for Nuclear Science and Technology, Institute of Geological and Mining Research, P.O. Box 4110 Yaoundé, Cameroon

2. Research Centre for Nuclear Science and Technology, Institute of Geological and Mining Research, P.O. Box 4110 Yaoundé, Cameroon, Nuclear Physics Laboratory, Faculty of Science, University of Yaoundé I, P.O. Box 812 Yaoundé, Cameroon

Abstract

Abstract This article deals with the development and implementation of a low-cost smart air quality monitoring device. The study aims to develop a simple, efficient, and cheap device dedicated to real-time monitoring of carbon dioxide (CO2) concentration and atmospheric parameters such as temperature (T) and relative humidity (RH). The realized device consists of sensors, data storage system, programmable card, and IoT wireless modules. It is designed for indoor and outdoor air quality monitoring. Wireless communication between realized device and control PC is ensured by the ZigBee protocol. This investigation is carried out to assess air quality considering the proliferation of pollutants and the modification of normal concentrations of atmospheric CO2 (400 ppm). Thus, the data processed are outdoor concentrations collected in November 2022 in some localities of the Adamawa Region, Cameroon. The average values of CO2 concentration measured in four subdivisions are 497.30 ± 11.32 ppm with a maximum and minimum values of [618 ~ 443] ppm in Ngaoundéré 1, 481.83 ± 14.90 ppm with [640 ~ 453] ppm in Ngaoundéré 2, 568.63 ± 25.03 ppm with [663 ~ 223] ppm in Martap and, 624.14 ± 3.96 ppm with [661 ~ 608] ppm in Minim. Martap and Minim locate one of the top bauxite deposits in the world. These values of CO2 higher than the normal atmospheric concentration indicate a moderate Air Quality Index (AQI) in these cities during the measurement period. The designed device is inexpensive, reliable, and appropriate for air quality monitoring.

Publisher

Research Square Platform LLC

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