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.
Papers published on a yearly basis
Papers
More filters
01 Jan 2005-Journal of Environmental Science and Health Part A-toxic\/hazardous Substances & Environmental Engineering
TL;DR: The results indicated that the mean concentrations of pollutants were low to cause any significant impact in air quality, and the area had no problem in meeting the air quality standards for CO and NO2.
Abstract: This study was basically designed to assess the potential environmental air quality impacts arising from the existing two operational trains at the Oman Liquid Natural Gas (OLNG) plant. The results of the paper contain a baseline survey of the existing environment. The pollutants studied included methane (CH4), non-methane hydrocarbons (NMHC), carbon monoxide (CO), nitrogen oxides (NOx), and suspended particulate matters (dust PM 10). Meteorological parameters monitored simultaneously include wind speed and direction, air temperature, and relative humidity. The air quality data were used to determine the diurnal and monthly variations in the pollutants. Description levels of the pollutants with respect to meteorological data were also used in analysis. Moreover, a statistical analysis of the collected data was presented. Generally, the results indicated that the mean concentrations of pollutants were low to cause any significant impact in air quality. The area had no problem in meeting the air quality standards for CO and NO2. It was also found that there was a random relationship between CO and NMHC, and between NO and NOx (no apparent correlation). The diurnal peaks of NOx, NO2, THC, and NMHC over a 24-h period were observed at around 9:00-10:00 AM (morning peak). For NO, NO2, and NOx, another peak was seen at around 5:00 PM (evening peak). Furthermore, the measured concentrations for NO2, NOx, and CO were found higher in winter than in summer. The study would help to gain a better understanding of local background levels of air pollutants at the area prior to the construction of new industrial projects, and to prepare action plans for controlling pollution in the area.
9 citations
TL;DR: In this article, a tracer gas study showed that a solid barrier reduced pollutant concentrations as much as 80% next to the barrier relative to an open area under unstable meteorological conditions, which corresponds to typical daytime conditions when residents living or children going to school near roadways are most likely to be exposed to traffic emissions.
9 citations
TL;DR: Electrostatic precipitator (ESP) has been suggested to all the above industrial units that would bring down the contribution to as low as 27 μg/m3.
Abstract: Emission load of particulate matter from 42 sponge iron industrial units located in clusters in the Indian State of Chhattisgarh was estimated to be 1,361 TPD. US EPA air pollution dispersion model ISCST-3 applied to predict the impact of the sponge iron industry emissions on ambient air quality showed contribution up to 546 microg/m(3) to the surrounding air basin causing the air quality exceeding the national ambient air quality standards. Electrostatic precipitator (ESP) has been suggested to all the above industrial units that would bring down the contribution to as low as 27 microg/m(3).
9 citations
TL;DR: A comprehensive emissions assessment was carried on three thermal power plants and one oil refinery operating on fossil fuel, mainly heavy residual oil, to assess the impact of plant emissions on ambient air quality as mentioned in this paper.
Abstract: Thermal power generation is associated with the emission of hazardous gaseous and particulate pollutants, which is one of the major contributors to deteriorated local ambient air quality. A comprehensive emissions assessment was carried on three thermal power plants and one oil refinery operating on fossil fuel, mainly heavy residual oil. The background ambient air quality was also monitored for criteria pollutants around three thermal power plants and one oil refinery to assess the impact of plant emissions on ambient air quality. Emissions of the critical air pollutants carbon monoxide, carbon dioxide, oxides of nitrogen, sulphur dioxide, particulate matter, lead, and mercury were monitored from the stacks of each plant. The emissions from all the stacks of these plants were monitored for a period of 6 months. The emission concentrations were compared with the National Environmental Quality Standards (NEQS) of Pakistan and with World Bank (WB) guidelines for thermal power plants. The study foun...
9 citations
TL;DR: In this article, the authors discuss the upset event research with a particular focus on the petroleum refining industry, a major source of industrial pollution, and discuss the effect of air pollution and excessive air emissions on public health.
Abstract: Chronic and acute exposure to toxic air pollution can cause and/or contribute to numerous health problems. The Federal Clean Air Act sets air pollution limits to ensure that our air is safe to breathe and requires that state agencies regulate the amount of chemicals that can be released into the air on a daily and yearly basis. Industry has found ways to circumvent emissions limits by reporting some emissions as “upset” events or unavoidable “accidents.” Previous research suggests that upset events occur frequently and can have a major impact on total air emissions each year. In this article, we discuss the upset event research with a particular focus on the petroleum refining industry, a major source of industrial pollution. We briefly discuss the effect of air pollution and excessive air emissions on public health, particularly in communities within close proximity to major oil refineries. We suggest that exposure to air pollution from the petroleum refining industry is a substantial problem, a...
9 citations