Martin Tushiminine Mpinda
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Tresor Ngobola Kisimba
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Theodore Mulembo Mwamba
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Emery Lenge Mukonzo Kasongo
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Arthur Tshamala Kaniki
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The Katangese Copperbelt area (KCA) located south-eastern of D.R. Congo presents high concentration of metal trace elements (MTE) in several soils due to a rich natural geochemical background, and intense mining activities, causing serious health issues to humans and animals. However, the lack of data on specific baseline concentrations makes it difficult to properly assess and monitor the environmental quality of soils in the region. In this study, the baseline concentration of 11 potentially toxic MTE (i.e., Mn, Zn, Cu, Co, Cr, Pb, Cd, Ti, Ni, Al, and Fe) was assessed in topsoils of the KCA, and the possible influence of land uses (croplands, forest and mining areas) was examined. Result delineated clear variability of metal concentrations across land uses. The highest concentrations of Cu and Zn found in mining areas than croplands and forests demonstrated a prevalent influence of mining activities in altering the natural background of metals concentrations in the region. By contrast, croplands and forests shared a similar trend of Al and Mn contents, suggesting a mild influence on agricultural activity. Intriguingly, however, higher Cu and Co contents were found in forests compared to croplands. For all the three studied land uses allocation, no straightforward relation was found between metal concentrations and soil total acidity. This study provides valuable information for legislative purposes and for soil quality reference values.