-This work demonstrates the application at near neutral pH of the photoFenton process mediated by ferricarboxylates on the treatment of aqueous solutions containing the antibiotic Oxytetracycline (OTC) under solar irradiation. The formation of a Fe:OTC complex after Fe 2+ oxidation to Fe 3+ , in the presence of H2O2, showed the inconvenience of using the conventional Fe 2+ /H2O2/UV-Vis process at near neutral pH levels, as the Fe:OTC complex is retained in the filter. To overcome this, a Fe 3+ /Oxalate process was proposed. Process efficiency was evaluated for variables such as Fe 3+ concentration and pH, using a compound parabolic collector (CPC) photoreactor at lab-scale under simulated solar radiation. The effect of the matrix was also tested by spiking OTC into two different real wastewaters.
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