the treatment of solutions containing soluble dyes is performed
by biochemical and coagulation processes. All these
methods are either costly, inefficient or result in the production
of secondary toxic waste products. Recently, advanced
oxidation processes (AOP) have received considerable attention
because it is possible to degrade organic compounds
and color from wastewaters (Schrank et al., 2007; Chanderia
et al., 2012). Fenton process as an important AOP technology
has been attracting growing interest. It is well known
that OH radicals can be produced by Fenton’s reaction of
H2O2 with Fe2+ and Fe3+ salts as presented in the following
equations.