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The photodegradation of orange green (OG) by excitation of Fe (III)-aqua complexes has been investigated under UV and solar light illumination. The rate of degradation has been found to be strongly influenced by the pH of the solution, initial concentration of Fe(III) and the nature of the light sources. The progress of removal of OG from solution has been monitored by recording the change of absorbance at λmax = 480 nm, (є = 1.27 × 10 4 L mol -1 cm -1 at 30°C), with time. The pH has beendoi:10.3329/dujs.v60i1.10334 fatcat:kigsetkohzdirohxa34us5ozly