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Abstract
The issue of investigations in this study was an application of heterogeneous Fenton-type
catalyst, Fe-exchanged zeolite FeZSM5, for the minimization of phenol and overall
organic content in the model wastewater. Applied treatment systems included variation
of heterogeneous and homogeneous Fenton-type catalyst with and without the assistance
of UV irradiation, FeZSM5/H2O2, Fe2+/H2O2/NH4ZSM5, Fe3+/H2O2/NH4ZSM5, UV/FeZSM5/H2O2,
UV/Fe2+/H2O2/NH4ZSM5 and UV/Fe3+/H2O2/NH4ZSM5. Processes efficiency was evaluated
on the basis of phenol removal, mineralization extent, H2O2 consumption and concentration
of iron ions in the bulk after the treatment. By all applied systems, complete phenol
removal was achieved in less than 30 min of treatment time. Systems including heterogeneous
Fenton-type catalyst showed somewhat lower mineralization efficiency in comparison
to the corresponding systems applying homogeneous Fenton-type catalysts and the addition
of synthetic zeolite NH4ZSM5. Significantly lower concentration of iron ions in the
bulk after the treatment could give these systems, particularly UV/FeZSM5/H2O2, a
great advantage over the homogeneous Fenton-type systems.