Treatment of simulated wastewater containing n-phenyl-n-isopropyl-p-phenylenediamine using electrolysis system with Ti/TiRuO2 electrodes.

摘要

This study investigated the effects of the electrolytic treatment in the simulated waste water with aromatic amine n-phenyl-n-isopropyl-p-phenylenediamine (Flexzone 3P) using Ti/TiRuO2 electrodes under 0.025 A/cm2 (DC) for different electrolysis durations (5, 15, 30, 45 and 60 minutes). Conductivity, pH, UV-visible spectra, gas chromatograms, toxicity and biodegradation tests were carried out. During the electrolytic treatment the pH decreased and conductivity increased slightly. After 60 minutes of electrolysis, the concentration of Flexzone 3P decreased by 65.1%. UV-vis spectra and chromatograms of simulated waste water showed changes in the molecular structure of the aromatic amine. After 5 and 15 minutes of electrolysis, the simulated waste water containing the Flexzone 3P showed detoxification by Saccharomyces cerevisiae toxicity test. The electrolysis of 5 minutes improved the biodegradation of the simulated waste water containing Flexzone 3P.