EN
Mineral water - hydrogen carbonat-calcium naturally sparkling water - containing arsenic in concentration above 0.01 mg/dm3 was ozonated. There was experimentally determined the optimal ozonation parameters: ozone dose, a duration of the process and of the contact between ozone and water, concentration of dissolved ozon in water. There was, moreover, determined an exceeding of ozone residual permissible in the obligatory regulations for bottled mineral waters.