INFLUENCE OF HUMIC SUBSTANCES ON THE FENTON TREATMENT OF WASTEWATER AT NEUTRAL pH

摘要

In the last two decades, the Fenton and Fenton-like processes including the photo-Fenton reaction and an application of ferric (Fe~(3+)) complexes with organic and inorganic chelating agents have been reported. These processes are considered to be convenient and economical ways to oxidize pollutants in water and soil. Both hydrogen peroxide and iron salts are inexpensive, safe and environmentally friendly. The general classic procedure of the Fenton reaction consists of the addition of hydrogen peroxide to a treated solution in the presence of ferrous (Fe~(2+)) ions. The mechanism of the reaction consists of a sequence of many steps including formation of hydroxyl radical HO· (1), a highly reactive oxidant which reacts with most organic contaminants at near diffusion-controlled rates.