THE ROLE OF MICROBIOLOGICAL PROCESSES IN THE FORMATION OF GEOCHEMICAL BARRIERS AND REDOX ZONES UPON POLLUTION OF SOILS AND AQUIFERS WITH METALS NEAR MSW DISPOSAL SITES
The article analyzes the role of microbiological processes in the formation of geochemical barriers and redox zones in the contamination of soils, rocks and groundwater with metals. A significant contribution to environmental pollution is made by heavy metals in waste storage sites, their migration with the forming filtrate to the aeration zone and ground-water. Special attention is paid to the characteristics of the behavior of heavy metals in changing redox conditions, their transformation and entry into groundwater. The mechanisms of biological transformation of metals in order to reduce their toxic impact on the environment are considered. It is noted that the biological detoxification of the natural environment is a combination of the processes of metabolism and bioconcentrating due to complex formation, sorption and biodegradation of the substance, depending on the biological activity of the environment and the nature of pollutants. The bioremediation of contaminated territories and aquifers is one of the safest, cost-effective, environmentally friendly technologies for the detoxification of contaminated areas of territories and aquifers.