Search

Data are presented on the contents of major ions (Ca2+, Mg2+, Na+, K+, N , Cl–, S , НС , and N ) along with dissolved trace elements (Sr, Ba, Fe, Mn, Co, Ni, Cu, Zn, Cd, Pb, Al, Ti, Rb, U, V, Cr, As, Se, Mo, and Ag) in the waters of 12 springs in Balashikhа urban district of Moscow Region. In view of the testing data for the springs, the composition of groundwaters in different water-bearing layers was characterized for the Ucha–Balashikha hydrogeologic block, which is associated with the western part of the Meshchera hydrogeologic region of the Moscow artesian basin. The waters were found to be of low-acid to near-neutral (pH 5.3–6.9), of 130–670 mg/L mineralization and are characterized by wide variety of their major component compositions, as well as by mainly increased concentrations of nitrate and ammonium ions. It was shown that the average contents of trace elements was characteristic in general for groundwaters in the leaching zone of the temperate climate. TLVs were not exceeded, excluding Fe and Mn, in waters of several springs. Based on thermodynamic calculations using Visual-MINTEQ software, it was found that the predominant dissolved forms in the waters of the surveyed springs were free ions for Ba, Sr, Fe, Mn, Zn, Cd, Ni, and Co, and carbonate or organic complexes for Cu and Pb. [ABSTRACT FROM AUTHOR]

Springs are an essential drinking water resource. Therefore, it is necessary to control spring water quality under the increasing anthropogenic pressure on the environment. This study was carried out to evaluate the content of major ions and trace elements in the waters of 28 springs in the Pushkinsky district of the Moscow region. The macro- and micro-component composition of groundwater of various aquifers was characterized according to the sampling data of springs. It is shown that the mean contents of trace elements in the waters of springs were at the level of concentrations characteristic of groundwater in the leaching zone of a temperate climate. Based on the thermodynamic calculation using the Visual-MINTEQ software, it was found that the predominant dissolved forms of Ba, Sr, Fe, Mn, Zn, Cd, Ni, and Co were free ions in the waters of the surveyed springs, while Cu and Pb were mainly presented in the form of carbonate and organic complexes. [ABSTRACT FROM AUTHOR]

Data on the levels of major ions (Na+, K+, Mg2+, Ca2+, ) and dissolved trace elements (Rb, Cs, Be, Sr, Ba, B, Si, Pmin, V, Cr, Ge, As, Mo, W, Sb, Te, Mn, Fe, Co, Ni, Cu, Zn, Cd, Ag, Sn, Pb, Al, Ga, Ti, Zr, and U) in the waters of 30 springs in Moscow during the winter low water period are presented. The geometric mean values and ranges of concentration of the studied components, as well as correlations between them were established. The presence of hydrochemical anomalies of dissolved iron and manganese in the northeast of Moscow with an excess of the maximum permissible concentration (MPC) for these elements was revealed, whereas in the rest of the city their concentrations corresponds to the natural background levels almost everywhere. [ABSTRACT FROM AUTHOR]