Determinación de plomo y cadmio en el hollín impregnado en aceras y bordillos de las estaciones de la Metrovía
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2019
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Facultad de Ciencias Naturales. Universidad de Guayaquil
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El trabajo comprendió la determinación de cadmio y plomo presentes en el hollín impregnado sobre las aceras y bordillos de las estaciones de la Metrovía, se dividió a la ciudad en tres sectores y se escogió dos estaciones de la Metrovía, se obtuvieron 12 muestras, 6 muestras en la zona norte y seis muestras en la zona centro de la ciudad, las cuales se analizó con el método de referencia EPA 6020 B/MM-AG/S-39. Obteniendo un promedio de 1,69 y 157,75 mg/kg de cadmio y plomo respectivamente, en la ciudad. El promedio de cadmio y plomo para el norte fue de: 2,20 y 178 mg/kg, y para la zona centro fue de 1,18 y 137,50 mg/kg, respectivamente.
Concluyendo que existen altos índices de contaminación por metales pesados en la ciudad, basándose en los límites máximos permisibles establecidos por la tabla uno, del anexo dos del TULSMA.
The work included the determination of cadmium and lead present in the soot impregnated on the sidewalks and curbs of the Metrovía stations, the city was divided into three sectors and two stations of the Metrovía were chosen, 12 samples were obtained, 6 samples in the northern zone and six samples in the downtown area, which were analyzed with the reference method EPA 6020 B / MM-AG / S-39, obtaining an average of 1.69 and 157.75 mg / kg of cadmium and lead respectively, in the city. The average of cadmium and lead for the north was 2.20 and 178 mg / kg, and for the center area, it was 1.18 and 137.50 mg / kg, respectively. Concluding that there are high rates of contamination by heavy metals in the city, based on the maximum permissible limits established by table one, of annex two of the TULSMA.
The work included the determination of cadmium and lead present in the soot impregnated on the sidewalks and curbs of the Metrovía stations, the city was divided into three sectors and two stations of the Metrovía were chosen, 12 samples were obtained, 6 samples in the northern zone and six samples in the downtown area, which were analyzed with the reference method EPA 6020 B / MM-AG / S-39, obtaining an average of 1.69 and 157.75 mg / kg of cadmium and lead respectively, in the city. The average of cadmium and lead for the north was 2.20 and 178 mg / kg, and for the center area, it was 1.18 and 137.50 mg / kg, respectively. Concluding that there are high rates of contamination by heavy metals in the city, based on the maximum permissible limits established by table one, of annex two of the TULSMA.
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HOLLÍN, METROVÍA, METALES CD Y PB, CONTAMINACIÓN URBANA