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Sono-oxidation treatment of humic substances in drinking water
F Chemat1, P G Teunissen, S Chemat
1Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments, Faculté des Sciences et Technologies, Université de la Réunion, 15 Avenue René Cassin, B.P. 7151, F-97715 Saint Denis messag, La Réunion, France D.O.M. chemat@univ-reunion.fr
Abstract:
Currently humic substances are removed from the raw water prior to chlorination by the conventional coagulation and filtration method using aluminium sulphate. Application of high-intensity (> 10 W/cm2) ultrasonic irradiation in conjunction with oxidative process using commercial oxidants H2O2 was investigated as an alternative. Sono-oxidation and sonodegradation of natural and synthetic humic substances have been followed over time by measuring total organic carbon (TOC) and absorbance by ultraviolet spectrometer (UV-VIS). It took approximately 60 min to reduce TOC by half and to have a complete degradation of humic acid.