Selenium Content in Environmental Objects and in the Hair of the Population in the Territory of the Oktyabrsky District of the Khanty-Mansi Autonomous Okrug - Yugra

Abstract

The purpose of the article is to assess the spatial distribution of selenium in the Oktyabrsky district of the Khan ty-Mansi Autonomous Okrug – Yugra and to establish the relationship of its content in soil, water and hair of the population. Materials and methods. In the Oktyabrsky district, soil, water, and hair samples were taken to study the microelement status of the territory. Sampling was carried out in accordance with State Standard and other standards, and selenium anal ysis in the samples was performed using atomic absorption and atomic emission spectrometry methods. Results and discussion. It was found that there is a defi ciency of selenium in the soil in the Oktyabrsky district. In sod dy podzolic soils, its marginal insuffi ciency was revealed, while in podzolic soils and gray forest soils, selenium defi ciency was recorded. The research results showed that the selenium level in surface and groundwater averages 0,74 micrograms/l and 0,31 micrograms/l, respectively. Analysis of the correlation between selenium content in soil and water did not reveal a signifi cant positive relationship. However, a positive correlation has been found between the selenium content in soil and groundwater. The average selenium content in residents' hair is 240 ± 33 micrograms/kg. This indicates a defi ciency of this element, since its defi ciency manifests itself at a concentration of less than 500 micrograms/kg. Conclusion. The selenium content in the soils and waters of the Oktyabrsky district of the Khanty-Mansi Autonomous Okrug – Yugra shows signifi cant defi ciency, especially in podzolic and gray forest soils. The level of selenium in the hair of the population is also low, especially in men, which confi rms the defi ciency of this element in the region. To improve the situation, measures are needed to enrich the soil and food with selenium, inform the population, and regularly monitoring the level of selenium.