Analysis of the Variability of Silicon, Strontium, and Boron Content in the Kura River (on the Territory of the Republic of Azerbaijan)

The paper analyzes the variability of silicon, strontium, and boron in the Kura River within the territory of the Republic of Azerbaijan. The studies were conducted during 2020–2022 based on analyzing 76 samples taken near the Shikhli-1 village, where the Kura River enters the territory of the republic, and then near the city of Mingachevir located at the outlet of the Mingachevir Reservoir, near the city of Sabirabad, where the Araz River flows into the Kura River, as well as near the city of Neftchala located near the mouth of the Kura River. It has been revealed that a negative trend is observed for silicon, and a positive one is registered for strontium and boron. It has been found that the observed concentrations of silicon and strontium in one of the samples taken in the Kura River exceed the maximum permissible values. In the samples taken at the Sabirabad and Neftchala stations, the boron levels are above MPC. The study shows that the silicon concentrations at the Neftchala station decrease by two times as compared to the Shikhli-1 station, while strontium and boron concentrations increase by 4.8 and 7.5 times, respectively.