Assessment of water supply to the east European arctic agglomeration from groundwater, taking into account their quality and health risks.

The purpose of the study is to assess the possibilities of using groundwater for water supply in the East European Arctic agglomeration based on an assessment of their quality and health risks. For this purpose, high-precision determinations of the complete macro- and microcomponent composition were carried out in sixty-six water samples taken from wells up to 180 m deep. It was found that in some samples the concentrations of Na+, Fe, B, Ba, Mn and U exceeded WHO standards.

Time regularities of strontium concentration in drinking groundwater distant from the sea coast.

This paper confirms the regularities of the formation of increased concentrations of strontium (Sr) in fresh groundwater used for drinking water supply, depending on the time they are residen in the carbonate deposits of the aquifer. On average, every thousand years, the Sr concentration increases by 2.1-3.

Transformation of the chemical composition of surface waters in the area of the exploited Lomonosov diamond deposit (NW Russia).

The specific objective of this study was to investigate the changes in the chemical composition of river waters during the exploitation of the Lomonosov diamond deposit and the danger of these changes for the ichthyofauna. It was found that the Ca-HCO composition of river water both upstream and downstream from the quarry was almost identical before discharge of the drainage waters into the river. In subsequent years, the water downstream from the quarry acquired a Na-HCO composition, and then a Na-HCO-Cl composition and TDS increased by 2.

Study of isotopes of carbon, thorium, and uranium in travertine and thermal spring samples: implications for effects of changes in geochemical environment and processes.

Data on modern radiocarbon activity in the old travertine formations of the Pymvashor hydrothermal system were used, in combination with Th/U dating of the travertine, to estimate the C contents of the total dissolved inorganic carbon in the ancient thermal water at the time of precipitation of the travertine (C). With the known values of C and average age of the thermal water, and under the assumption that the residence time of the water in aquifer was constant over the last 13.9 ± 1.