Topic
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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01 Jan 1986
13 citations
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TL;DR: In this paper, the authors assessed the air quality in the Irish town of Monasterevin before and after the location was bypassed with a new national motorway (M7).
Abstract: Air quality (CO, NO, NO 2 , NO X , PM10 and C 2 –C 6 hydrocarbons) was assessed in the Irish town of Monasterevin, before and after the location was by-passed with a new national motorway (M7). Prior to the opening of the motorway, transport between the cities of Dublin and Cork was facilitated by the N7 which ran through Monasterevin, leading to frequent congestion. Weekday air quality improved in the town following the opening of the M7 by-pass, with a reduction in ambient concentrations observed for all compounds except ethane and propane. Slight decreases in average weekend concentrations were observed for CO, NO X , NO, and NO 2 .
12 citations
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TL;DR: In this article, the authors used the Industrial Source Complex Short Term (ISCST3) emission dispersion model to measure the ground level concentration of criteria air pollutants within 50 km radius of location.
Abstract: The dispersion models were used to estimate or predict the concentration of air pollutants or
toxins emitted from sources such as industrial plants, vehicular traffic or accidental chemical releases.
In this study, the Industrial Source Complex Short Term (ISCST3) emission dispersion model
was used to measure the ground level concentration of criteria air pollutants within 50 km radius
of location. This model considered emissions from major point sources of pollutants in four existing
and twenty-three proposed Nigeria petroleum refineries. The obtained ground level concentration
for 24-hr averaging periods of the criteria air pollutants at sensitive receptor around each
of the refineries was compared with the National Ambient Air Quality Standards (NAAQS) of Nigeria,
World Bank and World Health Organization (WHO) to determine their level of compliance.
The highest ground level concentration predicted to be 450 - 1875 μg/m3 for 24-h averaging period
was obtained at Tonwei Oil Refinery, Ekeremor Local Government, Bayelsa State, while the
lowest ground level concentration predicted to be 0.0099 - 0.1 μg/m3 for 24-h averaging period
was obtained at Amakpe International Refinery, Eket Local Government, Akwa Ibom State. Percentage
set limits of criteria air pollutants ranging from 0.02% to 94.5% are within the set standard
limits and no health risk is associated with areas around the plant’s locations while percentage
set limits of criteria pollutants ranging from 1.1 to 55.6 folds of the standards exceed the
maximum permitted limits, hence affecting areas around the plants. The air quality standards
guiding petroleum refinery emissions must be strictly considered, in order to ensure that the
ground level concentrations do not exceed the required standard limits and prevent the adverse
effects of air pollution in the Nigeria airshed.
12 citations
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TL;DR: The potential adverse effects of concentrated animal feeding operations (CAFO) on the environment are a growing concern as discussed by the authors, and the air quality issues of most concern to CAFO vary but generally include ammonia, hydrogen sulfide, particulate matter, volatile organic compounds, greenhouse gases and odors.
12 citations