To study the micro-morphological characteristics of PM2.5 and its effect on ambient air quality, a 7500F scanning electron microscope (SEM) was utilized in this study to examine the micromorphology and elemental composition of PM2.5 and its impact on ambient air quality during heavily polluted weather in Yining City in the winter of 2018-2019. The results revealed the presence of numerous large solid shapes, small strip shapes, and a few irregular shapes. Additionally, the quantity of PM2.5 particles adsorbed on the glass fiber filter membrane was high, indicating a significant impact of PM2.5 particles on the urban area. Based on the analysis of particulate matter, heating time, and environmental conditions of samples during the winter heating season, it was concluded that the PM2.5 sample is rich in N, S, P, C, Na, Ge, Rb, Zn, Fe, Mg, Al, Mo, Pt, and Pb. The findings suggest that the urban area is predominantly influenced by industrial dust, road dust, construction cement dust, vehicle exhaust dust, and coal combustion during winter heating. The analysis and evaluation of the sample data indicate that PM2.5 in the urban area is influenced by human activities.
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[Physical effects of atmospheric pollution unconsciously perceived by citizenship, in the metropolitan area of Monterrey city, Nuevo León, Mexico].
Rev Salud Publica (Bogota)
July 2019
JL: Arq. Ph. D. Orientación en Trabajo Social y Políticas Comparadas de Bienestar Social. Facultad de Contaduría Pública y Administración (FACPYA), Universidad Autónoma de Nuevo León (UANL). Ciudad de Monterrey, Nuevo León, México.
Objective: Perceive the air pollution atmospheric by fine particles (PM25) in the human organism on the Metropolitan Urban Area of Monterrey [MUAM], Nuevo León; considering its effects and the sensorial detection capability by each subject's perception.
Materials And Methods: This research was made with 504 participating subjects exposed to the effects of the contaminants mentioned on the MUAM, Nuevo León, considering the background of each subject and their unconscious perception, in order to avoid the possible bias in the result.
Results: It was found that the present levels of environment pollution by fine particles affected on different ways the healthy participant subjects than the ones reported with any susceptibility or visual affection and/or respiratory illness.
At the end of 2019, the very first COVID-19 coronavirus infection was reported and then it spread across the world just like wildfires. From late January to March 2020, most cities and villages in China were locked down, and consequently, human activities decreased dramatically. This letter presents an "offline learning and online inference" approach to explore the variation of PM2.
View Article and Find Full Text PDFSpatial analysis of PM2.5 concentrations in Bogotá according to the World Health Organization air quality guidelines for cardiopulmonary diseases, 2014-2015.
Biomedica
March 2020
Maestría en Salud Pública, Universidad Santo Tomás, Bogotá, D.C, Colombia.
Introduction: The World Health Organization (WHO) points out that 3 million deaths per year caused by cardiopulmonary diseases are related to exposure to air pollution. Objective: To estimate areas of concentration of PM2.5 in Bogotá according to the WHO Air Quality Guidelines (AQG) for cardiopulmonary diseases during the period 2014-2015.
View Article and Find Full Text PDFVariations of air quality, meteorological conditions and the effect of pollution control measures on particle matter concentrations in Beijing were all analyzed during APEC (from 1st to 12th in November) in 2014 based on the atmospheric pollutant monitoring data, monitoring components of PM2.5, meteorological and remote sensing data and CMB model. The results showed that the average concentrations of PM2.
View Article and Find Full Text PDFand toxicity of urban and rural particulate matter from California.
Atmos Environ (1994)
February 2015
New York University School of Medicine, Nelson Institute of Environmental Medicine, Tuxedo, NY, USA.
Particulate matter (PM) varies in chemical composition and mass concentration based on location, source, and particle size. This study sought to evaluate the and toxicity of coarse (PM) and fine (PM) PM samples collected at 5 diverse sites within California. Coarse and fine PM samples were collected simultaneously at 2 rural and 3 urban sites within California during the summer.
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