Chemical composition and direct electrochemical oxidation of table olive processing wastewater using high oxidation power anodes.
Table olive processing wastewater (TOW) is a notoriously polluting due to its high organic and phenol content. To reduce them, an electrochemical process has been studied for the treatment of this effluent. Experiments were performed with a cell equipped with lead dioxide (PbO2) or boron-doped diamond (BDD) as anode and platinum as cathode, where Table Olive Wastewater (TOW) were destroyed by hydroxyl radicals formed at the anode surface from water oxidation. The comparative study of both systems shows the performance of the BDD anode compared to PbO2, explained by the large amounts of hydroxyl radicals generated effective at BDD anode and its synthesis characteristics. Using LC/MS analysis, it was possible to determine hydroxytyrosol, as major phenolic compounds, in table olive processing wastewater and its concentration reach 890 mg L-1. A possible reaction mechanism oxidation for hydroxytyrosol was proposed. The kinetics decays for hydroxytyrosol degradation on PbO2 anode follows a pseudo-first order reaction with a rate constant 0.9 h-1 for japp value 20 mA cm-2.
['Gargouri|Boutheina|B|', 'Gargouri|Olfa Dridi|OD|', 'Khmakhem|Ibtihel|I|', 'Ammar|Sonda|S|', 'Abdelhèdi|Ridha|R|', 'Bouaziz|Mohamed|M|']
D001895:Boron D018130:Diamond D004563:Electrochemistry D004566:Electrodes D019649:Food Industry D017665:Hydroxyl Radical D007700:Kinetics D007854:Lead D031658:Olea D010084:Oxidation-Reduction D010087:Oxides D019800:Phenol D010984:Platinum D062065:Waste Water D014867:Water D014874:Water Pollutants, Chemical
Table olive processing wastewater Hydroxyl radicals Hydroxytyrosol Electrochemical treatment