Browsing by Author "Diez, Sebastián César"

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    Allin-Wayra: una estación experimental para el monitoreo continuo de la calidad del aire empleando sensores de bajo costo.
    (Revista Fcultad de Ciencias Exactas, Físicas y Naturales., 2020) Diez, Sebastián César; Guizzo, José Edio; Fichetti, Tomás; Britch, Javier
    —Según la Organización Mundial de la Salud, cada año mueren prematuramente siete millones de personas debido a la contaminación del aire, de los cuales la mitad son de países en desarrollo. Los principales responsables de ello son el Ozono, los Óxidos de Nitrógeno, los Compuestos Orgánicos Volátiles, el Material Particulado, el Dióxido de Azufre y el Monóxido de Carbono. Éstos contaminantes impactan en las tasas de mortalidad y morbilidad debido a lesiones, enfermedades respiratorias y cardiovasculares, cáncer, trastornos del sistema nervioso, etc. Es por ello, que surge la necesidad de conocer las concentraciones presentes en la atmósfera. Si bien la Provincia de Córdoba fijó recientemente estándares para la calidad del aire, no cuenta con una red de monitoreo que permita conocer el estado de la atmosfera baja. Esto se debe a los altos costos que suponen la instalación y mantenimiento de este tipo estaciones. Por este motivo es que se presenta en este trabajo la mini-estación prototipo "Allin-Wayra", la cual ha sido construida con componentes de bajo costo y que registra las concentraciones de distintos contaminantes del aire. Si bien la estación ya se encuentra operativa, resta realizar una serie de etapas para poder validar sus mediciones
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    Emissions of land and air transport generated in an intermediate-sized city. The case of Cordoba, Argentina.
    (IEEE Xplore., 2019) Urquiza, Josefina; Diez, Sebastián César; Bianco, Anahí; Lucia, Movsesian; Britch, Javier
    The growth of urban centers has resulted in the deterioration of air quality representing a threat to health, not only due to direct exposure but also indirectly due to climate change. There are several sources of this deterioration among which are transport, industry and agriculture, all also influenced by population growth. However, in urban areas, transport is primarily responsible for the deterioration of air quality and the increase in greenhouse gas emissions. Argentina is the South American country with the highest urbanization rate in the region, with more than 92% of the population residing in urban areas and almost 50% concentrated in only 8 cities. This has resulted in an increasingly intensive use of motorized transport, not only because of the large distances that must be traveled, but also influenced by the ease of purchase of private vehicles (installment payments, “self-saving” plans, etc.), low air ticket costs, but also due to the inefficiency of public land transport. It is then necessary to know the magnitudes of the emissions generated and thus be able to develop public policies. That is why this work aims to present an inventory that simultaneously includes emissions from land transport and air transport in the city of Córdoba (Argentina), considering greenhouse gases(GHG) (CO2, N2O and CH4) and air pollutants (PM, NOx, VOCs, SOx and CO. The results indicate that land transport contributes 3.7x 106 tons per year of CO2e, while air transport 2.5 x104 tons of CO2e. As for the particulate material, air transport emits 0.49 tons / year while land transport issues 4.40 x 103 tons / year
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    Particulate matter concentrations originating from industrial and urban sources: validation of atmospheric dispersion modeling results
    (Elsevier B.V., 2015) Abril, Gabriela A.; Pignata, María Luisa; Diez, Sebastián César; Britch, Javier
    This study presents the analysis of the emission, transport, dispersion, and concentration of particulate matter emitted from a large industrial complex dedicated to the manufacture of cement in the town of Malaguen~o, province of Co´rdoba (Argentina), using the USEPA's (Environmental Protection Agency) AERMOD model. The model was applied for 224 industrial and background emission sources (8 stacks, 3 limestone quarries, 13 material storage piles, 18 agricultural fields and 182 paved and unpaved segment roads). The application of the model was validated with Total Suspended Particulate matter (TSP) measured at two monitoring sites, where samples were collected for 62 consecutive days in winter. The maximum TSP values obtained at both monitoring sites (748 and 1100 mg m—3) were well above the suggested WHO guidelines. The results obtained showed the impact of this industrial activity on local particulate matter concentrations, from which unpaved industrial roads and stockpiles were the most influential emission sources, directly affecting two of the closest neighborhoods in the area. Future studies will include the accumulation of heavy metals and Polycyclic Aromatic Hydrocarbons in TSP samples, the environmental risk assessment for exposure of the Malaguen~o population and the source apportionment of these pollutants