Geochemical Characteristic of Spring Water in the Southern Part of Balashikha Urban District, Moscow Region

Abstract

The article presents seasonal observation data on the concentrations of principal ions (Ca²⁺, Mg²⁺, Na⁺, K⁺, \({\text{NH}}_{4}^{ + }\), Cl^–, \({\text{SO}}_{4}^{{2 - }}\), \({\text{HCO}}_{3}^{ - }\), \({\text{NO}}_{3}^{ - }\)) and dissolved microelements (Al, As, Ba, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Rb, Sb, Se, Sr, Ti, U, V, Zn) in water in 12 springs in the Balashikha urban district, Moscow Region. The water was found to be weakly acid–near-neutral (pH 5.3–7.0), with a TDS of 120–730 mg/L; in terms of microelement composition, it is sulfate–hydrocarbonate, chloride- and nitrate-sulfate, chloride and sulfate-hydrocarbonate-chloride, mostly calcium, magnesium- and sodium-calcium, rarer calcium-sodium. It is shown that the mean microelement concentrations are generally at the level typical of groundwater in the leaching zone with moderate climate and do not exceed the MACs (except for Fe and Mn in water of some springs). The data of spring sampling was used to characterize groundwater chemistry in different aquifers.