Vol. 6, Issue 1, Part A (2024)

Introduction: Synthetic organic dyes are compounds that cannot be biologically degraded. This persistence is closely related to their chemical reactivity. If an organism has no specific mechanisms either to prevent resorption of a substance, or to eliminate it once it has been absorbed, then the substance accumulates.
Methodology: The present study is limited to monitoring the decolorization of aqueous solutions of orange acid 10 molecules as a function of time. More specifically, it aims to compare the performance of the "Fenton" process and the "photo-Fenton" process with regard to the degradation of orange acid 10 molecules. The "Fenton" and "photo-Fenton" processes are based on the attack of synthetic organic dyes by oxidizing, non-selective radical entities known as "hydroxyl radicals". These radicals can be generated by "Fenton" reagents (iron cations Fe2+/hydrogen peroxide molecules H202), which have been extensively studied to remove organic matter from drinking water, explosives waste, industrial and agricultural waste, and polluted soil.
Results: The results of our experiments lead us to conclude that the "photo-Fenton" process increases, albeit slightly, the degradation of orange acid 10 molecules compared to the "Fenton" process, irrespective of whether the medium is acidic, neutral or basic.
Conclusion: These results are one way of overcoming the problems posed by synthetic organic dyes.