Advanced electrochemical treatment of tetracycline-contaminated water using Pt/Ti electrodes
N. A. Ivantsova, Е. Н. Кузин, В. В. Кузнецов, Elena A. Filatova, А. В. Пирогов, Yury V. Timchenko, Frédéric Poineau, Konstantin E. German, Yulia M. Averina, А В Колесников
Abstract
, hydrogen peroxide and dissolved chlorine) that can potentially degrade tetracycline. The formation of these active species is due to the high positive potential of the Pt/Ti anode during electrolysis. HPLC-MS studies show the intensity of the tetracycline peak to gradually decrease during electrolysis, indicating its oxidation. Peaks corresponding to oxidation intermediates with a molecular weight above 70 were not detected, which indicates the absence of oxidation products with higher molecular mass. During electrochemical oxidation of tetracycline, small amounts of formaldehyde are formed, but its concentration can be brought to an acceptable level by diluting the solution. In negative mode, chlorate ions were detected in the NaCl solutions, which are likely formed from the stepwise oxidation of chloride ions; however, this phenomenon is not observed in HCl solutions.