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 GEP  Vol.6 No.10 , October 2018
Sediment Speciation from Dekin Groundwater at District of Dangbo (South Benin)
Abstract: The objective of this research is to determine the physicochemical elements contained in the groundwater and in the deposits originating from these waters of the Arrondissement of Dêkin, Commune of Dangbo in the South of Benin. Physical parameters were measured from the multi-parameter and the chemical parameters by reagent assays. The precipitate from the groundwater was studied by speciation. The different assays were carried out using the Hach Lange DR2800 Spectrophotometer. The data processing was done with different software including ArcGis 10.1, Diagram.Ink of Roland SIMLER and PHREEQC 2.17.4137. Strong mineralization of the deposit from the drilling water was indicated in these three elements: Copper (220.1 mg/kg), iron (2528 mg/kg) and zinc (239.5 mg/kg) whose contents are higher than the French guideline values for heavy metal content in sediments in mg/kg. The calculation of the Saturation Indices of the drilling water shows saturation with respect to Goethite and Hematite. All these results have led us to conclude that the high content of Metallic Trace Element (MTE) in the deposit and especially of the iron in the drilling water originates from the dissolution-precipitation of the aquifer rock.
Cite this paper: Alassane, A. , Chouti, W. , Adeke, H. , Hounkpe, J. , Mama, D. and Boukari, M. (2018) Sediment Speciation from Dekin Groundwater at District of Dangbo (South Benin). Journal of Geoscience and Environment Protection, 6, 59-72. doi: 10.4236/gep.2018.610005.
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