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title of the reference :  Dispersion des reliquats miniers et transferts des micropolluants chimiques en zones non saturée et saturée. Cas des rejets miniers de Fej Hsine dans l'oued Mejerda (Nord Ouest de la Tunisie).
Publication Date: 1995
Author : Ben Hamza Chedli
Catalogue type : Livre
Catalogue reference : T.XXII, N°3-4 (FRA) Géol. méditerr. T.XXII, N°3-4 Dispersion des reliquats miniers et transferts des micropolluants chimiques en zones non saturée et saturée. Cas des rejets miniers de Fej Hsine dans l'oued Mejerda (Nord Ouest de la Tunisie). Dispersion of mining residues and transfer of chemical micropollutants in the unsaturated and saturated zones. The case of the Fej Hsine waste dumps in the oued Mejerda (NW Tunisia) Mine tailings washed into Mejerda river, upstream of Ghardimaou town, undergoes a fractional decantation resulting in a vertical and horizontal selective granulometry: the finer particles are carried out in suspension by surface and bottom currents: sediments remaining in the residual zone and even further are coarser. Coring in the alluvion aquifer confirms this aspect and shows by means of chemical analyses, metals and trace-metals contents. The latter are very high in the non saturated zone and less concentrated in the saturated one. This implies, a priori, a metal transfer from the sediments toward the alluvial groundwater. bibliogr. Haldes ; Rivière ; alluvion ; Nappe alluvion ; pollution ; Métal lourd ; zone saturée ; analyse chimique ; polluant ; micropolluant ; Tunisie : Tunisie Nord Occidentale ; Fej Hsine : O. Mejerda : Ghardimaou Ben Hamza Chedli Géotechnique, Géologie de l'ingénieur
Indexation decimale : Géotechnique, Géologie de l'ingénieur
Keywords : Haldes ; Rivière ; alluvion ; Nappe alluvion ; pollution ; Métal lourd ; zone saturée ; analyse chimique ; polluant ; micropolluant ; Tunisie : Tunisie Nord Occidentale ; Fej Hsine : O. Mejerda : Ghardimaou
Summary : Mine tailings washed into Mejerda river, upstream of Ghardimaou town, undergoes a fractional decantation resulting in a vertical and horizontal selective granulometry: the finer particles are carried out in suspension by surface and bottom currents: sediments remaining in the residual zone and even further are coarser. Coring in the alluvion aquifer confirms this aspect and shows by means of chemical analyses, metals and trace-metals contents. The latter are very high in the non saturated zone and less concentrated in the saturated one. This implies, a priori, a metal transfer from the sediments toward the alluvial groundwater.
Exemplaries : TU1942


 

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