Abstract
Contamination of aquatic ecosystems by potentially toxic elements (PTEs) is a concerning environmental issue, given their persistence, toxicity potential, and ability to accumulate in living organisms. Several studies have been conducted to assess the contamination of aquatic ecosystems by PTEs, using pollution and ecological risk indices that rely on the concentration of these elements in aquatic sediments. However, many of these studies use global reference values for calculating the indices, which can lead to misleading interpretations due to substantial variations in PTEs concentrations influenced by the geological characteristics of each region. Therefore, the use of regional reference values is more appropriate when available. This study aimed to investigate variations in the results of five indices, employing global, regional, and quality reference values, based on sediment samples collected from rivers in the Ipanema National Forest, a protected area in Brazil exposed to various anthropogenic pressures. The results revealed that elements such as Al, Fe, and Mn exceeded the limits allowed by legislation in water samples, while As and Cr surpassed the limits in sediment samples. Comparative analysis highlighted significant discrepancies in the results of the indices when global reference values were used compared to regional and quality reference values, especially for As and Ba. Thus, this study underscores the importance of establishing specific regional values for an accurate assessment of sediment quality and the risks associated with contamination by PTEs in different regions worldwide.
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Acknowledgements
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brazil (CAPES)—Finance Code 001 (Process No 88887.668029/2022-725 00) and pro-equipment project (Proposal No 189683) CAPES no 11/2014, and was supported by Grant 2016/10796-5, Sao Paulo Research Foundation (FAPESP).
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This work was supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001 (process no 88887.668029/2022–725 00) and pro-equipment project (proposal no 189683) CAPES no 11/2014, and was supported by grant 2016/10796–5, Sao Paulo Research Foundation (FAPESP).
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Author Contributions Statement M.A.R.C.: Conceptualization, Methodology, Formal analysis, Investigation, Data Curation, Writing—Original Draft, Visualization. L.M.T.R.: Methodology, Formal analysis, Investigation, Data Curation. J.P.M.G.: Methodology, Investigation. M.A.: Investigation, Resources. W.G.B.: Writing—Review & Editing. L.C.O.: Conceptualization, Methodology, Investigation, Writing—Review & Editing, Supervision. All authors reviewed the manuscript.
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Carvalho, M.A.R., Rosa, L.M.T., Godinho, J.P.M. et al. Comparative analysis of sediment quality indices using different reference values in an environmental protection area in Southeastern Brazil. Environ Geochem Health 46, 154 (2024). https://doi.org/10.1007/s10653-024-01938-z
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DOI: https://doi.org/10.1007/s10653-024-01938-z