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The Houston-Galveston-Brazoria (HGB) area of Texas is a moderate nonat-tainment region for ozone, and has a history of severe summer ozone epi-sodes. W. A. Parish power plant (WAP) located in the greater Houston area is the largest coal and natural gas based electricity generating unit (EGU) in Texas. Forest residue is an abundant renewable resourc...
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... The most common indicators of air quality are particulate matter (PM) [7], and gases SO 2 [8], NO 2 [9] and O 3 [7]. Public transportation generates pollutants that have harmful effects on health and the environment [10], [11] Natural photochemical reaction [12], volcanic eruptions [13] and forest fires [14], and anthropogenic (http://www.who.int/airpollution/ambient/pollutants/en/) sources are responsible for air pollution. ...
... The most common indicators of air quality are particulate matter (PM) [7], and gases SO 2 [8], NO 2 [9] and O 3 [7]. Public transportation generates pollutants that have harmful effects on health and the environment [10], [11] Natural photochemical reaction [12], volcanic eruptions [13] and forest fires [14], and anthropogenic (http://www.who.int/airpollution/ambient/pollutants/en/) sources are responsible for air pollution. ...
This research focused on analyzing the behavior of the hourly average concentrations of PM10 and PM2.5 in relation to vehicular traffic, as well as the effect of relative humidity on these concentrations. Measurements of hourly particulate matter concentrations were recorded by the National Meteorology and Hydrology Service of Peru (SENAMHI) at five surface air quality stations. The profiles of PM10 concentrations are related to traffic behavior, showing high levels of concentrations at peak hours, while the PM2.5 profiles are flatter and better related to traffic in February (summer). The decrease in relative humidity between 80 to 65% in the mornings has a greater effect on the increase in PM10 and PM2.5 concentrations in February than in July (winter), and the increase in relative humidity between 65 to 80 % in the afternoon, it has a greater effect on the decrease in the concentration of PM2.5 in February than in July. The air quality in the north (PPD and CRB stations) and east (SJL station) of the Metropolitan Area of Lima (MAL) are the most polluted. The factors that relate PM10 concentrations with the Peruvian standard in February at these stations were 2.79, 1.78 and 1.26, and in July 2.74, 1.28 and 1.36 respectively. The highest and lowest variability of PM10 and PM2.5 in February and July occurred in the northern area (PPD and SMP stations).
... Electricity Generation Units (EGUs) are the leading point source emitters of SO 2 and NO x , which are associated with the formation of photochemical ozone and acid deposition [14] [15] [16]. Our previous study on biomass co-firing with coal in the W. A. Parish power plant in Houston showed that a 10% -15% reduction of NO x and VOC from the power plant could have a marginal decrease of ozone production in downwind areas [17]. In the HGB area, point, area, and mobile sources contributed 61%, 16%, and 23% respectively in 2014 and 67% of NO x emitted from mobile sources in the same year [17]. ...
... Our previous study on biomass co-firing with coal in the W. A. Parish power plant in Houston showed that a 10% -15% reduction of NO x and VOC from the power plant could have a marginal decrease of ozone production in downwind areas [17]. In the HGB area, point, area, and mobile sources contributed 61%, 16%, and 23% respectively in 2014 and 67% of NO x emitted from mobile sources in the same year [17]. A photochemical modeling study shows that mobile sources have a dominant effect on ozone formation at Sugarland, Bayland, and Conroe areas in the Greater Houston region [18]. ...
... A study reported that VOC-sensitive O 3 formation is more vigorous than NO x sensitive formation in the HGB area [40]. Hossan et al. (2018) reported that the C556 site showed VOCs sensitive to ozone formation in most of the hours on June 12 [17]. Most of the high ozone hours occurred on weekdays except June 9 (Saturday) at all locations and June 2 (Saturday) and ...
