نتایج جستجو برای: particulate matter with diameter less than 10 microns pm
تعداد نتایج: 9920432 فیلتر نتایج به سال:
Background and Objective: This study was conducted to investigate the long-term temporal trends and spatial variations of ambient PM10, PM2.5, O3, concentrations in Tabriz city during the years 2006-2017. Materials and Methods: Real-time hourly concentrations of PM10, PM2.5, O3 measured at nine air quality monitoring stations (AQMSs) were obtained from the Tabriz Department of Environment (TDo...
The authors performed a time-series analysis to test the association between air pollution and daily numbers of hospitalizations for headache in 7 Chilean urban centers during the period 2001-2005. Results were adjusted for day of the week and humidex. Three categories of headache-migraine, headache with cause specified, and headache not otherwise specified-were all associated with air pollutio...
The characteristics of particulate matter (PM) emitted from residual fuel oil combustion in two types of combustion equipment were compared. A small commercial 732 kW rated fire-tube boiler yielded a weakly bimodal particulate size distribution (PSD) with over 99% of the mass contained in a broad coarse mode and only a small fraction of the mass in an accumulation mode consistent with ash vapor...
3. Applicable Pollutants: Submicron Particulate Matter (PM) greater than or equal to 0.3 micrometer (μm) in aerodynamic diameter, and PM greater than or equal to 0.12 μm in aerodynamic diameter that is chemically, biologically, or radioactively toxic; hazardous air pollutants (HAPs) that are in particulate form, such as most metals (mercury is the notable exception, as a significant portion of ...
Air pollution is a major environmental issue in the world that can be harmful for human health. The aim of this study was to determine the health impacts of particulate matter with an aerodynamic diameter ≤10μm (PM10) in Ilam in 2013 and 2014. The air pollution data were obtained from the Ilam Department of Environmental Protection. The data were analyzed by Excel software, and...
Abstract (PM) Particulate matter is frequently cited as a cause of sickness. It confusing combination various chemical Aerosols and solids composed tiny fluid, dry solid broken pieces, particles pulps utilising liquid composites. For the goal regulating quality air, are classified by their diameter despite vast variation in size, shape, makeup, Those Particles with size ten microns or less (.P....
The Environmental scanning electron microscopy (ESEM) has been used in a preliminary study to determine the size and morphology of fine particulate matter (PM). This was done with several samples collected inside public transit buses fueled with a 20 percent biodiesel blend of biodiesel and ultra-low sulfur diesel (B20). As the technique is nondestructive, particles of interest can be relocated...
In this research, we investigated the public health risks associated with atmospheric exposure to PM2.5 for different subpopulations (black, white, Hispanic, youth, adults, and elderly) in the Washington, DC area. Washington, DC has long been considered a non-healthy place to live according to the American Lung Association due to its poor air quality. This recognition clearly includes the negat...
Particulate matter (PM) has been associated with mortality in several epidemiological studies. The US EPA currently regulates PM(10) and PM(2.5) (mass concentration of particles with diameter less than 10 microm and 2.5 microm, respectively), but it is not clear which size of particles are most responsible for adverse heath outcomes. A current hypothesis is that ultra-fine particles with diamet...
BACKGROUND Airborne mouse allergen has not previously been measured in inner-city homes, and its relationship to settled dust mouse allergen levels is unknown. OBJECTIVE To quantify airborne and settled dust Mus m 1 levels in homes of inner-city patients with asthma and to identify risk factors for mouse allergen exposure. METHODS One hundred inner-city school-age children with asthma in Ba...
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