Determinación de plomo, cadmio, arsénico y mercurio en sedimento de la zona de manglares junto a la ciudadela Las Garzas Guayaquil - Ecuador
Fecha
2022
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Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
Los manglares, debido a su alta productividad, se han visto afectados por diferentes actividades antropogénicas. El presente trabajo investigativo tuvo como finalidad determinar las concentraciones de los metales pesados plomo, cadmio, arsénico y mercurio en sedimento en la zona de manglares junto a la ciudadela Las Garzas, mediante el método de espectrofotometría de absorción atómica. Los resultados arrojados, mostraron valores promedio de arsénico y mercurio en sedimentos que estuvieron dentro de lo permitido en la normativa ambiental ecuatoriana y normativa internacional canadiense; a diferencia del cadmio, que fue excedido en los puntos P2, P3, P4, y el plomo sobrepaso los límites máximos permisibles en todos los puntos de muestreo de sedimentos. También se analizaron los parámetros físico-químicos oxígeno disuelto, temperatura, pH y salinidad en agua. Todos los valores de oxígeno disuelto no cumplieron con lo establecido en la normativa ambiental ecuatoriana TULSMA (menor a 5). Adicionalmente, se evaluó arsénico en agua; los resultados demostraron que se encuentra presente en concentraciones bajas, las cuales no superaron los límites máximos permisibles de la normativa ambiental ecuatoriana.
Mangroves, due to their high productivity, have been affected by different anthropogenic activities. The purpose of this research work was to determine the concentrations of heavy metals lead, cadmium, arsenic and mercury in sediment in the mangrove area next to the Las Garzas area, through the atomic absorption spectrophotometry method. The results showed average values of arsenic and mercury in sediments that were within what is allowed in the Ecuadorian environmental regulations and Canadian international regulations; unlike cadmium, which was exceeded at points P2, P3, P4, and lead exceeded the maximum permissible limits at all sediment sampling points. The physicochemical parameters dissolved oxygen, temperature, pH and salinity in water were also analyzed. All dissolved oxygen values did not comply with the provisions of the Ecuadorian environmental regulations TULSMA (less than 5). Additionally, arsenic in water was evaluated; the results showed that it is present in low concentrations, which did not exceed the maximum permissible limits of the Ecuadorian environmental regulations.
Mangroves, due to their high productivity, have been affected by different anthropogenic activities. The purpose of this research work was to determine the concentrations of heavy metals lead, cadmium, arsenic and mercury in sediment in the mangrove area next to the Las Garzas area, through the atomic absorption spectrophotometry method. The results showed average values of arsenic and mercury in sediments that were within what is allowed in the Ecuadorian environmental regulations and Canadian international regulations; unlike cadmium, which was exceeded at points P2, P3, P4, and lead exceeded the maximum permissible limits at all sediment sampling points. The physicochemical parameters dissolved oxygen, temperature, pH and salinity in water were also analyzed. All dissolved oxygen values did not comply with the provisions of the Ecuadorian environmental regulations TULSMA (less than 5). Additionally, arsenic in water was evaluated; the results showed that it is present in low concentrations, which did not exceed the maximum permissible limits of the Ecuadorian environmental regulations.
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Palabras clave
MANGLAR, METALES PESADOS, PARÁMETROS FISICOQUÍMICOS