Fenton and Photo-Fenton Processes

The discharge of industrial wastes directly into water bodies has raised serious problems during the last few decades. Due to the increased disposal of organics, there is a pressing demand for newer technologies for the complete mineralization of wastewaters. Advanced oxidation processes (AOPs) constitute a promising technology for the remediation of such wastewaters. One of the most efficient AOPs is the use of Fenton and photo-Fenton reagents. These reagents are potentially feasible options for purification of wastewaters. One of the major disadvantages of Fenton reagent is the deposition of large amounts of ferric ion sludge. There is a need for continuous addition of ferrous ion into the reaction medium for the reaction to proceed further. These disadvantages could be overcome by the use of photo-Fenton reagent, which is a cyclic process and regenerates Fe2+ ion. Fenton and majorly, photo-Fenton are the promising treatment options for wastewaters.