Environmental condition of the sediments from the Furo do Muriá, Amazon region, Pará – Northern Brazil
DOI:
https://doi.org/10.11606/eISSN.2236-2878.rdg.2025.236676Keywords:
Trace metals, Sediments, Estuary, Contamination sourceAbstract
This study investigated the concentrations of trace elements (Fe, Mn, Zn, Pb, and Cu) in surface sediments from Furo do Muriá, Curuçá River estuary, Pará, Brazil, during the rainy and less rainy seasons of 2015, data that can be used as a reference for the region. Fifty-six samples were collected from 14 points, and the concentrations of the elements were analyzed in relation to seasonality, and contamination indices were used (geoaccumulation index - Igeo, enrichment factor - FE, contamination factor - FC, potential ecological risk index - IREP). The results indicated that the average concentrations followed the order Fe > Mn > Zn > Pb > Cu, with significant differences between the averages of the elements, but without significant influence of seasonality. Igeo classified the environment as slightly contaminated, while FE suggested a natural origin for the elements. The FC indicated higher levels of Zn and Fe, but the IREP indicated low risk for Cu, Zn, and Pb. The characteristics of the estuarine environment with the predominance of fine sediments and the presence of mangroves favor the adsorption of trace elements. Correlation and cluster analyses suggested common sources and geochemical associations, mainly between Fe and Mn, reinforcing the influence of local geology. In general, the study indicates low to moderate contamination by trace elements in the sediments of Furo do Muriá, with a significant contribution from natural sources.
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Copyright (c) 2025 Me. Adriano Joaquim Neves de Souza, Ma. Rosa Maria da Luz Mendes, Dr. Mauricio Willians de Lima, Dr. José Almir Rodrigues Pereira, Dra Lourdes Santos, Dr. Maamar El Robrini

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