Approche hydrogéochimique à l’étude de la fluoration des eaux de la nappe du Complexe Terminal de la basse vallée de l’oued M’ya (Ouargla)

Abstract

The present work deals with the presence and the hydrochemical origin of fluoride in Terminal Complex aquifer of Ouargla. The results show the presence of fluoride in studied water. The concentrations vary between 0,9 and 1,42 mgl-1. The calculation of water saturation index in relation to the preponderant minerals, using the thermodynamic model phreeqci reveals a sensitivity of carbonate minerals towards precipitation, and dissolution of evaporitic minerals and fluorides clays as well.