The precipitation of fluoride, calcium and magnesium minerals from Egyptian Mediterranean Sea coast in relation to discharged waters

Abstract

AbstractThe present study focuses on the effect of discharged wastes on the precipitation of some minerals (calcite, aragonite, dolomite, fluorite and sellaite) as well as the chemical composition of seawater water columns along the eastern Egyptian Mediterranean Sea coast. This coast is subjected to different discharge waters containing agricultural, industrial, sewage and domestic wastes coming from the Nile River, the North Lakes as well as other different outlets. Variable levels of physicochemical parameters including temperature (T; 15.34–23.12°C), salinity (38.50–40.33%), pH (8.05–8.31), bicarbonate (HCO3; 63.73–147.22 mg/l), carbonate (CO3; 10.01–23.34 mg/l), calcium (Ca; 263.68–791.05 mg/l), magnesium (Mg; 799.67–2452.32 mg/l) and fluoride (F; 0.56–4.76 mg/l) were measured. Amongst the mineral production values that were calculated by saturation index (SI), fluorite and sellaite calculations almost showed values <1, especially in the Rosetta and Damietta sectors which are affected by the Nile Riv...