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Air pollutant concentrations

About: Air pollutant concentrations is a research topic. Over the lifetime, 1652 publications have been published within this topic receiving 36138 citations.


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Journal ArticleDOI
TL;DR: The impact on local concentrations due to industrial emissions, which were originally responsible for the major impact on air quality, is shown to drop over the years by 99% and 92% for dioxin and cadmium, respectively.

27 citations

Journal ArticleDOI
TL;DR: It was found that the concentrations of all air pollutants were negatively correlated with tree canopy cover and positively correlated with dwelling density, population density and traffic count, and could be of value in developing planning policies focused on urban greening.

27 citations

Journal ArticleDOI
01 Mar 2020
TL;DR: In this paper, a study was carried out to analyze the concentrations of some atmospheric pollutants in some parts of Imo State, southeastern Nigeria using statistical techniques and established possible relationship between pollutants spatial variation and dispersion with industrial and anthropogenic activities within the study area.
Abstract: This study was carried out to analyze the concentrations of some atmospheric pollutants in some parts of Imo State, southeastern Nigeria using statistical techniques. In the present study, PM10, NO2, SO2, CO, VOC and H2S in some parts of Imo State Southeastern Nigeria were analyzed to determine their presence, concentrations and possible sources of emission. This study also tried to establish possible relationship between pollutants spatial variation and dispersion with industrial and anthropogenic activities within the study area. The study area includes Egbema, Orlu, Okigwe and Orlu areas of Imo State, Nigeria. Air quality data was collected three times a day (morning, afternoon and evening) using the Gasman Air Monitors which was specifically used for SO2, NO2 and CO measurements, the Haze-dust Particulate Monitor 10 µm was used for PM10 data acquisition. Similarly, the Aeroqual Gas Monitor Model 300 was used for H2S measurement while the Ibrid MX6 Gas Monitor was used for VOC measurement. Results of the study revealed that the mean PM10 and CO levels in the locations exceeded the 24 h limit of 150 µg/m3 and 35 ppm of the United States National Ambient Air Quality Standards (US NAAQS) respectively. In addition, the mean concentrations of NO2 was above the annual limit of 0.053 ppm as prescribed by US NAAAQS, while the mean values of SO2 were within the annual and 1–hour limits of 0.5 ppm and 0.075 ppm respectively as stipulated by the US NAAQS. Whereas significant concentrations of H2S were not detected in the various locations, elevated concentration of VOC were recorded within Egbema area indicating possible influence from gas flaring and other crude oil related activities. The ANOVA and Box and Whisker plots revealed remarkable variations of the air pollutant concentrations in the study area. In addition, while the Hierarchical Cluster Analysis (HCA) grouped the pollutants into one major group, Principal Component Analysis (PCA) further grouped them into one coherent component indicating similar source of emission. The findings of this study therefore showed the need for regular air quality monitoring of the area to forestall adverse environmental problems.

27 citations

Journal ArticleDOI
TL;DR: In this paper, an objective clustering technique is applied to five-year (2013-2017) 23-station observational hourly wind data, and the effect of modulation of the clustered local wind fields on regional air quality is explored using simultaneous 55-site pollutant (PM2.5, PM10, NO2, and O3) concentrations.

27 citations

Journal ArticleDOI
TL;DR: A unique combination of vehicle emission measurements combined with simulations of traffic and vehicle variations, as well as urban topographies, to quantify health impacts of PM10 reduction in a single district of Paris, France, for various methods of traffic improvement.

26 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202316
20229
2021100
202084
201972
201852