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High-efficiency electro-Fenton mineralization of triclosan using a novel octahedral iron(iii) complex: structure,
Nejmeddine Rabaaoui1, Ahlem Guesmi2, Wiem Jabeur1
1Laboratory Physical-Chemistry of the Solid State, Department of Chemistry, Faculty of Sciences of Sfax, University of Sfax B.P. 1171 Sfax 3000 Tunisia houcine_naili@yahoo.com.
Abstract:
This study reports the synthesis and structural elucidation of a novel iron(iii) coordination complex, [Fe(CO3)(en)2]Cl (1), and its integration as an efficient cathodic modifier in an advanced electro-Fenton (EF) system for the degradation of the emerging pollutant triclosan. Unlike conventional EF systems, the rationally designed iron complex enhances iron redox cycling and hydroxyl radical generation, leading to significantly improved mineralization efficiency. Under optimized conditions, the modified system achieved over 97% TOC removal within 210 min, following pseudo-first-order kinetics (k = 0.0195 min-1). Mechanistic investigations revealed progressive dechlorination and oxidation into short-chain carboxylic acids prior to complete mineralization. This work demonstrates how coordination chemistry can be strategically integrated into electrochemical advanced oxidation processes to improve efficiency, stability, and sustainability in wastewater treatment applications.
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