title: Chemical composition and direct electrochemical oxidation of table olive processing wastewater using high oxidation power anodes.
abstract: 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 PbO2anode follows a pseudo-first order reaction with a rate constant 0.9 h-1for jappvalue 20 mA cm-2.
authors.affiliation: Laboratoire d'Electrochimie et Environnement, Ecole Nationale d'Ingénieurs de Sfax, Université de Sfax, BP «1173», 3038, Sfax, Tunisia.
authors.forename: Boutheina
authors.initials: B
authors.lastname: Gargouri
authors.affiliation: Laboratoire d'Electrochimie et Environnement, Ecole Nationale d'Ingénieurs de Sfax, Université de Sfax, BP «1173», 3038, Sfax, Tunisia.
authors.forename: Olfa Dridi
authors.initials: OD
authors.lastname: Gargouri
authors.affiliation: Laboratoire d'Electrochimie et Environnement, Ecole Nationale d'Ingénieurs de Sfax, Université de Sfax, BP «1173», 3038, Sfax, Tunisia; Laboratoire d'Analyse, Valorisation et Sécurité des Aliments, Ecole Nationale d'Ingénieurs de Sfax (ENIS), Université de Sfax, BP 1175, 3038, Sfax, Tunisia.
authors.forename: Ibtihel
authors.initials: I
authors.lastname: Khmakhem
authors.affiliation: Laboratoire d'Electrochimie et Environnement, Ecole Nationale d'Ingénieurs de Sfax, Université de Sfax, BP «1173», 3038, Sfax, Tunisia.
authors.forename: Sonda
authors.initials: S
authors.lastname: Ammar
authors.affiliation: Laboratoire d'Electrochimie et Environnement, Ecole Nationale d'Ingénieurs de Sfax, Université de Sfax, BP «1173», 3038, Sfax, Tunisia.
authors.forename: Ridha
authors.initials: R
authors.lastname: Abdelhèdi
authors.affiliation: Laboratoire d'Electrochimie et Environnement, Ecole Nationale d'Ingénieurs de Sfax, Université de Sfax, BP «1173», 3038, Sfax, Tunisia. Electronic address: mohamed.bouaziz@fsg.rnu.tn.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Bouaziz
mesh_terms: D001895:Boron / Q000737:chemistry; D018130:Diamond / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods; D004566:Electrodes; D019649:Food Industry; D017665:Hydroxyl Radical / Q000737:chemistry; D007700:Kinetics; D007854:Lead / Q000737:chemistry; D031658:Olea / Q000378:metabolism*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D019800:Phenol / Q000032:analysis / Q000737:chemistry; D010984:Platinum / Q000737:chemistry; D062065:Wastewater / Q000032:analysis*; D014867:Water / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D001895:Boron; D018130:Diamond; D017665:Hydroxyl Radical; D007854:Lead; D010087:Oxides; D019800:Phenol; D010984:Platinum; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical; C047365:lead oxide
keywords: Electrochemical treatment; Hydroxyl radicals; Hydroxytyrosol; Table olive processing wastewater