Chemical composition and source apportionment of PM10 at an urban background site in a high–altitude Latin American megacity (Bogota, Colombia)

Ramírez, Omar; Campa, Ana M. Sánchez de la; Amato, Fúlvio; Catacolí, Ruth A.; Rojas, Néstor Y.; Rosa, J. de la

doi:10.1016/j.envpol.2017.10.045

Cited by 77 publications

(33 citation statements)

References 93 publications

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“…Table 2 specifies that at the urban site the highest PM 10 average concentrations are registered during the wet season days without rain events, as also most of the elements. This result agrees with other studies 58 . This increase in the concentrations of PM 10 and elements during the wet season may be due to an increase in relative humidity (see Table 4), which causes worsened combustion efficiency 37 ; urban dynamics, such as an increase in the acceleration and braking rates, which can raise the pollutant emission rate 25,58 ; and a higher intensity of anthropogenic activity during school period (September-June).…”

Section: Methodssupporting

confidence: 94%

“…This result agrees with other studies 58 . This increase in the concentrations of PM 10 and elements during the wet season may be due to an increase in relative humidity (see Table 4), which causes worsened combustion efficiency 37 ; urban dynamics, such as an increase in the acceleration and braking rates, which can raise the pollutant emission rate 25,58 ; and a higher intensity of anthropogenic activity during school period (September-June). The latter causes an increase in the use of highly contaminating diesel-powered school buses 39 .…”

Section: Methodssupporting

confidence: 94%

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Seasonal variations in PM10 inorganic composition in the Andean city

Žalakevičiūtė

Alexandrino

Rybarczyk

et al. 2020

Sci Rep

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Particulate matter (PM) is one of the key pollutants causing health risks worldwide. While the preoccupation for increased concentrations of these particles mainly depends on their sources and thus chemical composition, some regions are yet not well investigated. In this work the composition of chemical elements of atmospheric PM10 (particles with aerodynamic diameters ≤ 10 µm), collected at the urban and suburban sites in high elevation tropical city, were chemically analysed during the dry and wet seasons of 2017–2018. A large fraction (~ 68%) of PM10 composition in Quito, Ecuador is accounted for by water-soluble ions and 16 elements analysed using UV/VIS spectrophotometer and Inductively Coupled Plasma—Optical Emission Spectroscopy (ICP-OES). Hierarchical clustering analysis was performed to study a correlation between the chemical composition of urban pollution and meteorological parameters. The suburban area displays an increase in PM10 concentrations and natural elemental markers during the dry (increased wind intensity, resuspension of soil dust) season. Meanwhile, densely urbanized area shows increased total PM10 concentrations and anthropogenic elemental markers during the wet season, which may point to the worsened combustion and traffic conditions. This might indicate the prevalence of cardiovascular and respiratory problems in motorized areas of the cities in the developing world.

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Section: Methodssupporting

confidence: 94%

Section: Methodssupporting

confidence: 94%

Seasonal variations in PM10 inorganic composition in the Andean city

Žalakevičiūtė

Alexandrino

Rybarczyk

et al. 2020

Sci Rep

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“…Solid particles' input to the snow cover is due to precipitation from the atmosphere, DISs application on roads, blowing of road dust and soils particles from snow-free areas, and spraying of mud sediment from the surface of roadways during snow melting. Resuspended road dust is reported to be one of the most important sources of microparticles in the atmosphere; for example, in Bogota, it supplies about 23% of the mass of PM 10 particles [101] and in the USA, more than a half of PM 10 and about a quarter of PM 2.5 particles [102]. In Paris, the contributions of road dust emissions were estimated to be 13% of atmospheric PM 10 , while the sum of vehicle exhaust and wear accounted for 47% of PM 10 [103].…”

Section: Suspended Forms Of Mmsmentioning

confidence: 99%

Dissolved and Suspended Forms of Metals and Metalloids in Snow Cover of Megacity: Partitioning and Deposition Rates in Western Moscow

et al. 2020

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Concentrations and ratio of dissolved and suspended forms of metals and metalloids (MMs) in snow cover and their deposition rates from the atmosphere in the western part of Moscow were studied. Forms of MMs were separated using a filter with pore diameter of 0.45 μm; their concentrations were measured by ICP-MS and ICP-AES methods. Anthropogenic impact in Moscow caused a significant increase in dust load (2–7 times), concentration of solid particles in snow cover (2–5 times), and mineralization of snow meltwater (5–18 times) compared to the background level. Urban snow contains Sn, Ti, Bi, Al, W, Fe, Pb, V, Cr, Rb, Mo, Mn, As, Co, Cu, Ba, Sb, Mg mainly in suspended form, and Ca and Na in dissolved form. The role of suspended MMs in the city significantly increases compared to the background region due to high dust load, usage of de-icing salts, and the change of acidic background conditions to alkaline ones. Anthropogenic emissions are the main sources of suspended Ca, W, Co, V, Sr, Ti, Mg, Na, Mo, Zn, Fe, Sb, and Cu in the snow cover of traffic zone. These elements’ concentrations in roadside snow cover exceed the background values more than 25 times. The highest concentrations and deposition rates of MMs in the snow of Moscow are localized near the large and medium roads.

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“…,Ramírez et al 2018); if OC and EC came from the same emission source, it would be expected that both species were correlated. Calculated values of TC/EC ranged between 2.29 (1.3) and 20 (16) with a median value of 8.95 (0.93), suggesting a significant contribution of OC due to SOA formation.…”

mentioning

confidence: 99%

A Study of PM2.5 Elemental Composition in Southwest Mexico City and Development of Receptor Models With Positive Matrix Factorization

Hernández-López

Miranda

Múgica-Álvarez

et al. 2020

RICA

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A study of elemental composition of PM2.5 samples collected at the main campus of the Universidad Nacional Autónoma de México, comprising data from 2015, 2016, and 2019, is described. X-ray fluorescence analysis was employed to measure concentrations of up to 19 elements, complemented with ion chromatography for eight ionic species (for samples of 2015 and 2016), and thermo-optical analysis for organic and elemental carbon (for samples of 2015). Positive matrix factorization (PMF) was applied to develop receptor models for each year, to identify polluting sources and their contributions to total mass. Five sources were identified in every case. With the aid of PMF, the influence of biomass burning on a major episode in May, 2019, was recognized. Comparisons with previous studies in this or nearby sites are also presented. It should be noted that only limited compositional data in this site are available since 2005 for the aerosol fine fraction.

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Chemical composition and source apportionment of PM10 at an urban background site in a high–altitude Latin American megacity (Bogota, Colombia)

Cited by 77 publications

References 93 publications

Seasonal variations in PM10 inorganic composition in the Andean city

Seasonal variations in PM10 inorganic composition in the Andean city

Dissolved and Suspended Forms of Metals and Metalloids in Snow Cover of Megacity: Partitioning and Deposition Rates in Western Moscow

A Study of PM2.5 Elemental Composition in Southwest Mexico City and Development of Receptor Models With Positive Matrix Factorization

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