RADIOLYTIC PROCESSES IN MIXTURE OF WATER WITH CARBON DIOXIDE IN THE PRESENCE OF ORGANIC MATRIX

Abstract

The radiolysis of purified water, its mixture with carbon dioxide, and also with the addition of salt of potassium chloride isotope (40KCl) and plant mass to this system were carried out in order to study the mechanism of radiolytic processes taking place in the plant mass in the presence of the natural potassium isotope (40K) contained in it. It revealed that in the presence of 40KCl in the system, the formation of trace amounts of molecular hydrogen is observed (in accord with an insignificant dose of radiation from 40K). A decrease in the rate of formation of molecular hydrogen with an increase in the concentration of CO2 is observed during the radiolysis of a two-component system (H2O - CO2). An increase in the rate of formation of molecular hydrogen, carbon monoxide, methane and relatively heavy hydrocarbons (C6, C7, C8) accompanied by an increase in the absorbed dose of ionizing radiation (at stable concentrations of all components of the system) is observed when studying the kinetics of the formation of radiolysis products of the multicomponent system "H2O - CO2 - 40KCl - organic matrix". There is a tendency to reduce the rate of formation of molecular hydrogen and methane and increase the rate of formation of CO and relatively heavy (C6, C7, C8) hydrocarbons with an increase in CO2 concentration. The rates of formation of all products (H2, CO, CH4, and relatively heavy hydrocarbons) grow with an increase in the amount of organic matter in the mixture (at stable concentrations of CO2, H2O, and 40KCl). İt found that an increase in the mass of the organic matrix in the analyzed multicomponent system stimulates an increase in the formation of all radiolysis products. There is a decrease in the rate of formation of H2 and CH4, a relatively slow increase in the rate of formation of carbon monoxide, and an increase in the rate of elementary reactions of the transformation of light radiolysis products (H2, CO, CH4) into relatively heavy products (C6, C7, C8) together with an increase in CO2 concentration. The results obtained show the expediency of taking into account the contribution of ionizing radiation from radionuclides present in the environmental components, when considering multistage biochemical mechanisms of photosynthesis in order to explain the initiation of energy-intensive processes of CO2 and H2O decomposition