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Abstract            Volume:14  Issue-1  Year-2026         Original Research Articles


Online ISSN : 2347 - 3215
Issues : 12 per year
Publisher : Excellent Publishers
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Heavy Metal Concentrations and Ecological Risk Assessment of the Mine Tailings around Moanda Manganese Mining areas of Gabon
Norbert Ondo Zue Abaga1*, Aurélien Mokea-Niaty2 and Albert Novy Messi Me Ndong3
1Unité de Recherche en Sciences de la Terre et de l’Environnement, Département de Géologie, Université des Sciences et techniques de Masuku, Franceville, Gabon 2Unité de Recherche Agrobiologie, Département de Biologie, Université des Sciences et techniques de Masuku, Franceville, Gabon 3Unité de Recherche en Chimie (URCHI), Département de Chimie,  Université des Sciences et techniques de Masuku, Franceville, Gabon
*Corresponding author
Abstract:

This study aimed to assess the concentrations of trace elements and the associated ecological risk in tailings collected around the manganese mining area of Moanda in Gabon. The contents of trace elements in the mining tailing samples determined using the XRF analysis were significantly higher than their average concentrations in the upper continental crust (UCC), indicating a polymetallic contamination in the following order: Mn>Cu>Zn>Ni>Co>Cr>Pb>Zn. The Mn more concentrated in tailing samples would accumulate in the edible parts of plants cultivated around the manganese mine of Moanda. The values of geoaccumulation index (Igeo) and contamination factor (CF) indicate a moderate contamination in Co, Cu, and Cr, and a high contamination by Mn, Cu, Ni, and As. Results indicate a very high ecological risk (Ri) to the local biocenosis. These results highlight the need to implement strategies to mitigate environmental impacts and develop systems to protect local ecosystems and communities from the adverse effects of mining activities in the region of Moanda.

Keywords: Heavy metals, manganese mine, tailing, ecological risk, Moanda, Gabon
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How to cite this article:

Norbert Ondo Zue Abaga, Aurélien Mokea-Niaty and Albert Novy Messi Me Ndong. 2026. Heavy Metal Concentrations and Ecological Risk Assessment of the Mine Tailings around Moanda Manganese Mining areas of Gabon.Int.J.Curr.Res.Aca.Rev. 14(1): 8-19
doi: https://doi.org/10.20546/ijcrar.2026.1401.002
Copyright: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.


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