Out-Door Air Pollution Levels in Vehicular-Traffic Junctions in Nsukka Metropolis, Enugu Metropolis and Awgu Semi-Urban Area in Enugu State, Nigeria

Onyeka, Okeke; Ifeyinwa, Okeke Cecilia; Ernest, Ezeh; Adunola, Ikusika Bamidele; Onyinye, Nwigwe Juliet

doi:10.4236/ojap.2020.94007

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Pollutants measured using OC 300 Laser Dust Particle is particulate: PM 10 , PM 5 , PM 2.5 and PM 1.0 .The measurement campaign was carried out for 7 days from 02 August to 08 August 2021, between 6-10 am and 4-8pm. The choice of time slots is justi ed by the fact that several works locate the heavy tra c during these periods, which correspond to the hours when people leave the house and the times of return (Houngbégnon et al, 2019;Onyeka et al, 2020). This data will also allow us to evaluate the Air Quality Index (AQI) to get an idea of the air quality in our study area.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of fine particle concentrations and estimation of air quality index (AQI) over northeast Douala, Cameroon

Mezoue

Ngangmo

Choudhary

et al. 2023

Environ Monit Assess

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The paucity of data regarding air quality monitoring and pollutant emissions from various sources in the city of Douala, allowed us to initiate a measuring campaign at the main road entrance of the university campus. Using the OC 300 Laser Dust Particle, nes particles concentrations are monitored during one week from Monday to Sunday. The instrument used detects four (04) different sizes of particles: PM 10 , PM 5 , PM 2.5 , and PM 1 . The daily average concentrations measured ranged from 9.47 ± 0.26 to 50.14 ± 2.42 µg.m − 3 for PM 1.0 ; 13.13 ± 0.38 to 86.65 ± 3.96 µg.m − 3 for PM 2.5 ; 13.60 ± 0.40 to 100.56 ± 4.20 µg.m − 3 for PM 5 and 14.52 ± 0.42 to 114.59 ± 4.60 µg.m − 3 for PM 10 . Exceptions made from PM 5 and PM 1.0 which were not in relation to the WHO (World Health Organization) guideline values, the level of PM 10 and PM 2.5 are higher than the WHO standards. The air quality index (AQI) is between very poor and poor during this measurement campaign, indicating that residents of the study region are highly exposed.Through the use of correlation studies, it has been demonstrated that the predominant source of ne particles in the studied region is vehicular activity. As a result, tra c density is the most signi cant factor causing the different air pollution levels seen in the tested areas.

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Section: Introductionmentioning

confidence: 99%

“…of PMs in ambient air. Some authors(Hashim et al, 2021;Houngbégnon et al, 2019;Onyeka et al, 2020) have demonstrated that the change in mass concentrations of concentrations can also rely on the density of road tra c during measurement hours.…”

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confidence: 99%

Measurement of fine particle concentrations and estimation of air quality index (AQI) over northeast Douala, Cameroon

Mezoue

Ngangmo

Choudhary

et al. 2023

Environ Monit Assess

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“…Outdoor air pollution is a major environmental health problem affecting eve-ryone in low, middle and high income countries of the world [1]. Nitrogen Oxides are the main contaminants in the air, and it is also the main component of the precursors of PM2.5.…”

Section: Introductionmentioning

confidence: 99%

Application of SCR Denitration in Treatments of Nitrogen Oxides in the Air

Yan¹

2023

ACE

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This article mainly introduces the background of nitrogen oxides in air pollution and SCR technology in detail. SCR has become a very wide range of pollution control technology in recent years, because it saves energy, produces no pollution, and is easy to operate. The article clearly lists the reaction mechanism, reaction materials and matters needing attention when SCR is applied. As a problem that has plagued people for several years, air pollution has always existed in our daily life. If SCR technology is well applied, air pollution will be effectively controlled in the near future.

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Measurement of Fines Particle Concentrations and estimation of Air Quality Index (AQI) over Northeast Douala, Cameroon

Mezoue

Ngangmo

Choudhary

et al. 2022

Preprint

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The paucity of data regarding air quality monitoring and pollutant emissions from various sources in the city of Douala, allowed us to initiate a measuring campaign at the main road entrance of the university campus. Using the OC 300 Laser Dust Particle, fines particles concentrations are monitored during one week from Monday to Sunday. The instrument used detects four (04) different sizes of particles: PM10, PM5, PM2.5, and PM1. The daily average concentrations measured ranged from 9.47 ± 0.26 to 50.14 ± 2.42 µg.m− 3 for PM1.0 ; 13.13 ± 0.38 to 86.65 ± 3.96 µg.m− 3 for PM2.5 ; 13.60 ± 0.40 to 100.56 ± 4.20 µg.m− 3 for PM5 and 14.52 ± 0.42 to 114.59 ± 4.60 µg.m− 3 for PM10. Exceptions made from PM5 and PM1.0 which were not in relation to the WHO (World Health Organization) guideline values, the level of PM10 and PM2.5 are higher than the WHO standards. The air quality index (AQI) is between very poor and poor during this measurement campaign, indicating that residents of the study region are highly exposed. Through the use of correlation studies, it has been demonstrated that the predominant source of fine particles in the studied region is vehicular activity. As a result, traffic density is the most significant factor causing the different air pollution levels seen in the tested areas.

show abstract

Out-Door Air Pollution Levels in Vehicular-Traffic Junctions in Nsukka Metropolis, Enugu Metropolis and Awgu Semi-Urban Area in Enugu State, Nigeria

Cited by 4 publications

References 13 publications

Measurement of fine particle concentrations and estimation of air quality index (AQI) over northeast Douala, Cameroon

Measurement of fine particle concentrations and estimation of air quality index (AQI) over northeast Douala, Cameroon

Application of SCR Denitration in Treatments of Nitrogen Oxides in the Air

Measurement of Fines Particle Concentrations and estimation of Air Quality Index (AQI) over Northeast Douala, Cameroon

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