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Addressing this issue, the proposed approach, incorporating waste iron shavings as a heterocatalyst within a modified Fenton process, represents a sustainable and effective solution for contaminants degrading in WFGD wastewater. Furthermore, this study aligns with the Best Available Techniques (BAT) regulations by meeting the requirement for compound oxidation\u2014replacing the chlorine utilization with the generation of highly reactive radicals\u2014and coagulation, which completes the treatment process. This method introduces an innovative use of waste-derived iron shavings in a BAT-compliant technology, providing a sustainable and cost-effective alternative to conventional treatments. The study focuses on process kinetics and optimization parameters, achieving approximately 48% total organic carbon (TOC) removal in 90\u00a0min at an optimal pH 3, using 1998 mgL<jats:sup>\u22121<\/jats:sup> H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> under UV light. Analysis of variance revealed that the process efficiency depended more significantly on pH than time duration or the H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> dose. Catalyst\u2019s characterization, including the use of microscopic techniques, including electron microscopy, laser diffraction, X-ray fluorescence, Raman spectroscopy, and UV spectroscopy, indicates its stability and great reusability with consistent TOC decrease across three process cycles. 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