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Hydrochemical characterization of water resources in the Santa María Valley, NW of Argentina

Author Affiliations

  • 1Instituto de Química Analítica, Facultad de Bioquímica, Química y Farmacia. Universidad Nacional de Tucumán. Ayacucho 471. S. M. de Tucumán. CP 4000, Argentina
  • 2Facultad deCiencias Naturales, Universidad Nacional de Tucumán, Miguel Lillo 205. S. M. de Tucumán. CP 4000. Argentina
  • 3Facultad deCiencias Naturales, Universidad Nacional de Tucumán, Miguel Lillo 205. S. M. de Tucumán. CP 4000. Argentina
  • 4Instituto de Química Analítica, Facultad de Bioquímica, Química y Farmacia. Universidad Nacional de Tucumán. Ayacucho 471. S. M. de Tucumán. CP 4000, Argentina
  • 5Instituto de Química Analítica, Facultad de Bioquímica, Química y Farmacia. Universidad Nacional de Tucumán. Ayacucho 471. S. M. de Tucumán. CP 4000, Argentina

Res.J.chem.sci., Volume 7, Issue (4), Pages 14-23, April,18 (2017)

Abstract

Hydrochemical researches in Santa María Valley located in Catamarca and Tucumán in the northwest of Argentina were carried out to assess the chemical characteristics of surface water and groundwater, to understand the sources of dissolved ions by defining the principal hydrochemical processes in order to provide theoretical bases to developing strategies of natural resources uses in the region. This region is dominated by a semi-arid climate. A total of twenty five water samples have been collected. The physicochemical parameters determined in water by standardized methods werepH, electrical conductivity (EC), major ions (calcium, magnesium, sodium, potassium, chloride, sulphate, carbonate and bicarbonate) and Total Dissolved Solids (TDS). According to the Piper diagram, the region mainly contains Na-Ca–HCO3 followed by Na-HCO3-Cl, Ca-Na-HCO3-SO4 and Mg-Ca-Na-HCO3 water types. The contents of sodium, calcium, magnesium, chloride, sulphate and bicarbonatein the waters of the area areexplained by the dissolution of halite, calcite, dolomite and gypsum and other reactions like cation exchange and weathering of minerals of basement rocks.

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