Redox Reactions in Natural and Waste Water Treatment Processes

Abstract

The reasonability of using the redox potential to characterize the state of a certain water system was substantiated. Peat fulvic acids characteristic for the natural water of the Dnipro River were selected as a target compound for study before and after the adsorption processes. Fruitstone-derived activated carbon (FDAC), FDAC oxidized by hydrogen peroxide (FADC-O), and FDAC modified with iron oxides (FDAC-Fe) were used as adsorbents. All the systems with both distilled and tap water were shown to have an oxidative character for the period of study, especially after sodium azide and hydrogen peroxide were added. The introduction of fulvic acids into the system neutralized this effect due to their interaction. The redox potential was proposed to use for simplified measurement as an indicator of pollution in water of different types.