Chemical composition and direct electrochemical oxidation of table olive processing wastewater using high oxidation power anodes
| Autor: | Mohamed Bouaziz, Ibtihel Khmakhem, Boutheina Gargouri, Ridha Abdelhedi, Sonda Ammar, Olfa Dridi Gargouri |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Lead dioxide 02 engineering and technology Wastewater 010501 environmental sciences Electrochemistry 01 natural sciences law.invention chemistry.chemical_compound Reaction rate constant law Olea Food Industry Environmental Chemistry Phenol Organic chemistry Electrodes Boron Platinum 0105 earth and related environmental sciences Hydroxyl Radical Public Health Environmental and Occupational Health Water Oxides General Medicine General Chemistry 021001 nanoscience & nanotechnology Pollution Cathode Anode Kinetics Lead Chemical engineering chemistry Hydroxytyrosol Diamond 0210 nano-technology Oxidation-Reduction Water Pollutants Chemical |
| Zdroj: | Chemosphere. 166:363-371 |
| ISSN: | 0045-6535 |
| Popis: | 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 (PbO 2 ) 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 PbO 2 , 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 PbO 2 anode follows a pseudo-first order reaction with a rate constant 0.9 h −1 for j app value 20 mA cm −2 . |
| Databáze: | OpenAIRE |
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