Determination of the presence of mercury in the species Pimelodus clarias and in sediments from the confluence of the Bogotá River and the Magdalena River and its possible social impact
DOI:
https://doi.org/10.36436/24223484.223Keywords:
Bioacumulación, ictiofauna, metales pesados.Abstract
The objective of this research was to determine the presence of mercury in the species Pimelodus clarias and in sediments from the confluence area of the Bogotá River with the Magdalena River and its possible social impact on the associated communities in the municipality of Girardot, Cundinamarca. Mercury analyses were performed using the atomic absorption spectrophotometry method and the Past program was used for statistical interpretations. The results show an average mercury concentration in 25 fish samples analyzed of 0.042 ± 0.044 mg / kg, with a minimum value of < 0.001 mg / kg and a maximum value of 0.165 mg / kg, the relationship between the concentration of Hg vs. Size is (r: -0.20) (p: 0.32) and that of Hg vs. weight is (r: -0.16) (p: 0.44). Low concentrations of mercury were found in the sediments, and they are considered viable for cultivation due to a high CEC of 34.69 cmol (+)/kg. In conclusion, although the highest concentration of mercury found in Pimelodus clarias does not reach the internationally accepted limits of 0.5 µg/g to consider them unfit for human consumption, fishing in this area and the consumption of mercury-contaminated foods should be reduced. Furthermore, it is considered that the most important aspect of this study is not the concentrations, but rather the determination of the presence of this highly toxic metal for humans, which could become a public health problem in the region.Downloads
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