Study of spatial distribution of elements in the system “water – bottom sediments” of the Uzynbulak creek of the Semipalatinsk test site

The results of studying the features of the spatial distribution of macro- and microelements in the “water – bottom sediments” system in the channel of the Uzynbulak creek (“Degelen” site of the Semipalatinsk test site, Kazakhstan) are presented. The studies were carried out in the summer of 2015. As a result of the study of the chemical composition in surface waters and bottom sediments of the Uzynbulak creek, the content of Li, Be, Na, Mg, K, Ca, V, Ni, Mo, Fe, Sr, Al, Zn, Ba, La, Ce, U was revealed. The nature of the origin and the main factors determining the increased content of a number of the studied elements have been determined. The main mechanisms of the formation of the elemental composition in surface waters, the degree of spreading of elements exceeding the MPC (maximum permissible concentration) beyond the “Degelen” site are considered.