Effect of concentration of salts on electrical properties of sediments, Lake Quaroun, Fayium, Egypt

• Mohamed M. Gomaa ^[1] ; Hussein Metwally ^[2] ; Ahmed Melegy ^[1]
  1. [1] Geophysical Sciences Department, National Research Center, Cairo
  2. [2] Geological Sciences Department, National Research Center, Cairo
• Localización: Carbonates and Evaporites, ISSN 0891-2556, Vol. 34, Nº. 3, 2019, págs. 721-729
• Idioma: inglés
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• Resumen

  • The variation of salinity from Lake Quaroun, Fayium, Egypt may be a good indicator to differentiate between different levels of basins that have different concentrations of salts. There are four ponds (from the lake directly) that have different concentrated impurities and different soluble salts. According to the solubility product, some of the carbonate salts in addition to other impurities precipitate in the first pond. The rest of the carbonate minerals precipitate in second pond. Sulphate salts will precipitate in the third pond. Finally, chloride salts will precipitate in the fourth pond in the form of gel crystals. These chloride salts is pumped to plants to produce the nardite salt. The electrical properties were used in this study as a new tool to differentiate between the pollution of waste water and to define the pollution process. In addition, geochemical analyses, for bottom sediments, in the four ponds were done using XRF. Electrical properties were measured in frequency range of 42 Hz–5 MHz at room temperature. Slight changes were noticed between the samples taken from the different bonds. The changes in the electrical properties were found to be the result from changes in mineralogical composition in the different bonds. Most of the samples were composed of grains of clay-size fractions. The dielectric constant, generally, was found to decrease with discontinuous conduction paths and with frequency. Electrical conduction, usually, was found to increase with the increase of conductor continuous paths and with frequency.