Envi-ronmentally safe technologies for purification of drinking water in the Lower Volga region based on natural sorbents

In recent decades, the biosphere of the Lower Volga region has been experiencing colossal an-thropogenic and technogenic impacts. The aquatic environment experiences the greatest pressure of ecotoxicity, being the final reservoir of most pollutants. Over the past 30 years, the structure of water use has changed significantly, which is reflected in a sharp increase in the social component of water use. The share of domestic drinking water supply increased from 9 % in 1970 to 25 % in 2019. In connection with this, there is a real problem of drinking water quality, determined by contamina-tion of natural water, unsatisfactory purification at water supply stations, and secondary pollution in distribution networks. The particular relevance of the issue of water purification is determined by its reduction in the cost of drinking water purification. In this regard, the use of natural sorbents for re-moving dispersed impurities, oil and oil products, surfactants, dyes, radioactive contamination, etc., deposits of which are located in the Astrakhan region, seems very promising. In this regard, it is nec-essary to analyze the composition of drinking water purification facilities in urban and rural settle-ments of the Astrakhan region, identify problems of the ecological state of water sources, study the mineralogical composition of natural sorbents in the Astrakhan region and propose technologies for drinking water purification using natural sorbents. To do this, it is necessary to summarize the availa-ble information on their use, as well as outline rational ways of their use in specific technological processes of water treatment