Descontaminação de uma solução de ciprofloxacina pelo processo de peroxidação eletroquímica

Abstract

This research had as objective to evaluate the efficiency of the Electrochemical Peroxidation (EP) process in the decontamination of Ciprofloxacin (CIP) in solution. From an initial concentration condition of 25 mg CIP L -1 , experimental tests were performed to investigate the influence of the PE process variables, like: [Fe 2+ ], current intensity, pH initial of solution, [H 2 O 2 ], injection of air dissolved and time of electrolysis. The experiments were conducted in a batch performance reactor, having as electrodes a set of 4 plates of stainless steel 304, with area effective equivalent to 152,2 cm². In times of electrolysis from 0 to 90 min, were evaluated concentrations residuary of CIP, pH of solution and temperature. In the best conditions of the PE process also were identified concentrations of metal ions and residues of [H 2 O 2 ]. The higher efficiency of the reduction [CIP] was observed in the respective experimental conditions; Current intensity 0,5 A, pH initial of solution 3, [100 mg L -1 H 2 O 2 ], rate 1,6 L air min -1 dissolved and time of electrolysis in 30 min., obtaining a [CIP] ~ 3 mg L -1 . However, we can highlight that the EP process can be considered an method alternative applied like polishing final (tertiary) in wastewater, minimizing the impacts environmental caused by the inappropriate discard of this contaminant in water bodies.