SUSTAINABILITY OF THE HYDROMINERAL RESOURCE FROM THE BORCUTULUI VALLEY, BAIA SPRIE CITY

Abstract

The paper presents the results obtained in the laboratory regarding the concentrations of the tested quality indicators, necessary to outline an initial assessment of the current state of quality for the hydromineral source in the city of Baia Sprie, Maramureș county. The equipment used in the laboratory analyzes is represented by: the Hanna instrument laboratory multimeter for the determination of pH, TDS, electrical conductivity, electrical resistivity and salinity values; Hanna Instruments HI 93703 turbidimeter for turbidity determination; spectrophotometer Iris Vision HI801 for the determination of microelements (Ca2+, Mg2+ and Cl-), microelements (Fe2+, Zn2+, Cu2+, Cr2+, Mn2+), sulfates, nitrates and nitrites, ammonium, Al3+, Cr6+; Binder drying oven for determining the dry fixed residue indicator at a temperature of 180 °C. According to the obtained results, the hydrothermal source falls into the category of natural mineral waters with acid pH (pH˂6.103), which presents a rich mineralization (Rs=2775 mg/L), at the same time as being a ferruginous water with a concentration of Fe2+=1.43 mg/L, with a high salinity S=5.4%, in which there is a considerable presence of microelements Ca2+=130 mg/L, Mg2+= 27 mg/L, but also SO4 2-=150 mg /L. The investigations did not signal the presence of the Al3+ ion and only in small amounts are nitrate ions (0.65 mg/L), nitrites (NO2, -N) =0.019 mg/L and the Zn2+ ion (0.09 mg/L). The results highlight the presence of Mn2+=1.8 mg/L and NH4 -=1.79 mg/L in high concentrations that can change the organoleptic characteristics of the water. Based on the results obtained, recommendations are specified regarding the diversification of the range of indicators that need to be monitored over a longer period, the purpose of which is to establish as accurately as possible the quality status of this hydromineral water source and to be able to propose recommendations regarding its sustainability over time, by establishing the doses and frequencies of human consumption.