A combination of H2O2 and UV radiation with ferrous ion
(Fe(II)) or ferric ion (Fe(III)), the so-called photo-Fenton process,
are involves irradiation with light, which increases the
rate of contaminant degradation by stimulating the reduction
of Fe(III) to Fe(II) [9,18,19]. This method has shown promise
process due to more hydroxyl radicals in comparison with the
UV/H2O2 and Fenton process. The efficient use of light quanta in
photo reduction of ferric ion and the photolysis of Fe(III)-organic
intermediate chelates are the major reasons in high efficiency of
this method [