The impact of geology on the migration of fluorides in mineral waters of the Bukulja and Brajkovac pluton area) Serbia

Abstract

One of the hydrogeochemical parameters that classify groundwater as mineral water is the con- tent of fluoride ions. Their concentration is both important and limited for bottled mineral waters. Hydrochemical research of mineral waters in the surrounding area of Bukulja and Brajkovac pluton, in cen- tral Serbia, was conducted in order to define the chemical composition and genesis of these waters. They are carbonated waters, with content of fluoride ranging from 0.2 up to 6.6 mg/L. Since hydrochemical analyses showed variations in the major water chemistry it was obvious that, apart from hydrochemical research, some explorations of the structure of the regional ter:rain would be inevitable. For these pulposes, some additional geological research was performed, creating an adequate basis for the interpretation of the genesis of these carbonated mineral waters. The results confirmed the significance of the application of hydrochemical meth- ods in the research of mineral waters. The work tended to emphasize that "technological treatment" for decreasing the consentration of fluoride in mineral waters occurs in nature, indicating the existence of natu- ral defluoridization.