Electrochemical Treatment of the Antibiotic Sulfachloropyridazine: Kinetics, Reaction Pathways, and Toxicity Evolution

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Ahmad Dirany

2012

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  • The electro-Fenton treatment of sulfachloropyridazine, a model for sulfonamide antibiotics that are widespread in waters, was performed using cells with a carbon-felt cathode and Pt or boron-doped diamond anode, aiming to present an integral assessment of the kinetics, electrodegradation byproducts, and toxicity evolution
  • On the basis of the action of OH onto four different SCP sites, the pathways leading to total decontamination includes fifteen cyclic byproducts identified by HPLC and GC-MS, five aliphatic carboxylic acids, and a mixture of Cl, SO42, NH4+, and NO3– that accounted for 90–100% of initial Cl, S, and N
  • The time course of byproducts was satisfactorily correlated with the toxicity profiles determined from inhibition of Vibrio fischeri luminescence. 3-Amino-6-chloropyridazine and p-benzoquinone were responsible for the increased toxicity during the first stages
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