Trace Element Composition of Surface Water in Almaty City and Human Health Risk Assessment.

This investigation meticulously examined the elemental composition of 64 water samples collected during the seasons of spring, summer, autumn, and winter of the year 2023. The average seasonal concentrations of arsenic (As), beryllium (Be), cobalt (Co), cadmium (Cd), copper (Cu), lithium (Li), molybdenum (Mo), nickel (Ni), lead (Pb), selenium (Se), uranium (U), mercury (Hg), aluminum (Al), barium (Ba), chromium (Cr), iron (Fe), manganese (Mn), strontium (Sr), vanadium (V), zinc (Zn), calcium (Ca), potassium (K), magnesium (Mg), sodium (Na), and chlorine (Cl) as well as SO and dry residue were computed at 16 strategically selected sites along the Bolshaya and Malaya Almatinka, Esentai, and Kargalinka rivers situated in Almaty. The sampling locations were categorized into three distinct sectors: upper (adjacent to mountainous regions), middle (urban zone), and lower (exceeding city limits), thereby facilitating the examination of discrepancies in water quality and elemental concentrations.

Study of radionuclide composition of the drinking water potential sources at the Semipalatinsk nuclear test site.

The contamination degree with artificial radionuclides of the "Degelen" site streams, as well as the wells and boreholes fed from the underground water sources, has been studied. These objects are the potential sources of drinking water at the Semipalatinsk Nuclear test site. Such approach made it possible to identify the most significant radionuclides-contaminants typical for the selected objects, to reveal the nature of contaminants distribution, and to calculate the radionuclide indices for all the sampling points.

Radioactive particles released from different sources in the Semipalatinsk Test Site.

A total of 456 nuclear tests were performed from 1949 to 1989 at the Semipalatinsk Test Site (STS) in Kazakhstan, as part of the nuclear weapon test program of the USSR. To identify if radionuclides such as Cs, Sr, Am, Pu were associated with radioactive particles, soil samples were collected at selected contaminated sites (i.e.

Comparative analysis of water contamination of the Shagan river at the Semipalatinsk test site with heavy metals and artificial radionuclides.

The purpose of this paper is to determine the degree of contamination of the largest waterway of the Semipalatinsk Nuclear Test Site (STS), the Shagan River, with heavy metals and artificial radionuclides. With the data obtained by the long term monitoring results, we identified the most significant contaminants and determined the most contaminated reaches of the Shagan River. The contamination indices for heavy metals were calculated and applied to evaluate possible usage of the Shagan River water for domestic purposes.