Cuantificación de metales pesados en Anadara tuberculosa(Mollusca:bivalvia) del estero Huaylá de Puerto Bolívar, por espectrofotometría de absorción atómica. // Quantification of heavy metals in Anadara tuberculosa, (Mollusca: bivalvia) from the Huaylá estuary of Puerto Bolívar, by atomic absorption spectrophotometry.

Abstract

ResumenLa presencia de metales pesados en moluscos bivalvos implica un grave problema para la salud de los consumidores de este tipo de alimento. Por ello, el objetivo de la investigación fue determinar la presencia de metales pesados en Anadara tuberculosa, moluscode importancia comercial en Puerto Bolívar, Ecuador. El método utilizado para cuantificar la concentración de metales pesados fue la espectrofotometría de absorción atómica, se determinó la concentración de seis metales: Plomo (Pb), Arsénico (As), Mercurio (Hg), Cadmio (Cd), Cromo (Cr) y Cobalto (Co). Los valores promedios obtenidos, expresados en mg.kg-1 fueron: Pb (7,52 ± 0,46); As (1,55 ± 0,14); Hg (364,38 ± 91, 39); Cd (1,68 ± 0,28); Cr (3,89 ± 1,82) y Co (2,71 ± 0,34 en Anadara tuberculosa. Los resultados muestran que el Pb, As, Cd, y Hg superan los límites máximos permisibles, el Mercurio supera en más de 100 veces el valor límite. La talla más pequeña (3-4 cm) del molusco en estudio posee la capacidad de bioacumular mayor concentración de Pb, Cd y Cr.Palabras Clave: A. tuberculosa;metales trazas; moluscos bivalvos;bioacumulación. AbstractThe presence of heavy metals in bivalve molluscs implies a serious problem for the consumers health of this type of food. Therefore, the objective of the present investigation was to determine the presence of heavy metals in Anadara tuberculosa, mollusc of commercial importance at Puerto Bolívar, Ecuador. Atomic absorption spectrophotometry was the method used to quantify the concentration of heavy metals. The concentration of six metals was determined: lead (Pb), arsenic (As), mercury (Hg), cadmium (Cd), chromium (Cr) and cobalt (Co). The average values obtained, expressed in mg.kg-1 were: Pb (7.52 ± 0.46); As (1.55 ± 0.14); Hg (364.38 ± 91.39); Cd (1.68 ± 0.28); Cr (3,89 ± 1,82) and Co (2,71 ± 0,34 in A. tuberculosa The results show that Pb, As, Cd, and Hg exceed the maximum permissible limits, mercury exceeds by more than 100 times the limit value. The smaller size (3-4 cm) studied mollusc, has the capacity to bioaccumulate higher concentration of Pb, Cd and Cr.

Quantification of Heavy Metal Content in Anadara tuberculosa from the Gulf of Guayaquil Using ICP-OES: Assessing Marine Contamination

“…Figure 5 shows that the average concentrations of lead (Pb) in the three sampled sites are similar. According to the research [30], the combustion of gasoline from boats used in fishing activities is one of the primary anthropogenic sources of Pb in the landing areas of artisanal docks in Ecuador and a possible source of Pb in the sectors sampled. Although Pb concentrations are below the limits proposed by the European Union, a higher Pb content can be observed in Playas and La Libertad because they are fishing ports that harbor vessels a few kilometers from their shores daily.…”

Environmental characterization of the estuarine zone of the Gulf of Montijo, province of Veraguas, Panama

“…Bioaccumulation processes are reported in the gonadal tissue of Anadara tuberculosa; in the Farfa ´n estuary, Gulf of Montijo [29]. This species is commercially exploited, which could seriously threaten the ecosystem, impacting consumers' health of this type of food [30]. Contamination by trace metals is associated with a risk to human health.…”