ELECTROCHEMICAL OXIDATION OF ORAL CONTRACEPTIVES IN AQUEOUS MEDIUM
Because of the risk that emerging contaminants pose to both human health and the environment, various treatments have been evaluated to achieve degradation. Advanced Oxidation Processes, including anodic oxidation represent a technically feasible and valuable for the treatment of these contaminants alternative. Preliminary results from the anodic oxidation of an oral contraceptive ( ethinylestradiol - gestodene ) are presented herein . The tests were carried out in an electrochemical cell not divided 50 mL reaction volume. As anode and cathode electrodes of boron-doped diamond, parallel arranged two cm apart were used. The efficiency of the anodic oxidation was evaluated under different values of current intensity and concentration of supporting electrolyte (Na2SO4). The tests were carried out according to a 3x3 factorial design. The levels of the first factor, current, were 100, 200 and 300 mA. The three levels of the second factor, supporting electrolyte concentration, were 0.02, 0.05 and 0.1 M. The variance analysis allowed us to observe that the efficiency of the system was controlled by the current intensity (p <0.001). The electrolyte concentration showed no significant difference (p = 0.85) nor interaction occurred between the two factors evaluated (p = 0.272). Under the best conditions found (200 mA induced current and 0.02 M Na2SO4), maximum removal of 89.9% of initial COD concentration of 700 mg L-1 was achieved. The results presented to the anodic oxidation as a technically viable approach to treatment of oral contraceptives (mixture of estrogens) such as ethinylestradiol, gestodene alternative mixture.Keywords: Emerging Contaminants, Degradation of oral contraceptives, estrogens, process electrochemicaladvanced oxidation.
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Instituto de Ingeniería, Universidad Nacional Autónoma de México
2014
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| Online Access: | https://www.revistas.unam.mx/index.php/aidis/article/view/46795 |
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| Summary: | Because of the risk that emerging contaminants pose to both human health and the environment, various treatments have been evaluated to achieve degradation. Advanced Oxidation Processes, including anodic oxidation represent a technically feasible and valuable for the treatment of these contaminants alternative. Preliminary results from the anodic oxidation of an oral contraceptive ( ethinylestradiol - gestodene ) are presented herein . The tests were carried out in an electrochemical cell not divided 50 mL reaction volume. As anode and cathode electrodes of boron-doped diamond, parallel arranged two cm apart were used. The efficiency of the anodic oxidation was evaluated under different values of current intensity and concentration of supporting electrolyte (Na2SO4). The tests were carried out according to a 3x3 factorial design. The levels of the first factor, current, were 100, 200 and 300 mA. The three levels of the second factor, supporting electrolyte concentration, were 0.02, 0.05 and 0.1 M. The variance analysis allowed us to observe that the efficiency of the system was controlled by the current intensity (p <0.001). The electrolyte concentration showed no significant difference (p = 0.85) nor interaction occurred between the two factors evaluated (p = 0.272). Under the best conditions found (200 mA induced current and 0.02 M Na2SO4), maximum removal of 89.9% of initial COD concentration of 700 mg L-1 was achieved. The results presented to the anodic oxidation as a technically viable approach to treatment of oral contraceptives (mixture of estrogens) such as ethinylestradiol, gestodene alternative mixture.Keywords: Emerging Contaminants, Degradation of oral contraceptives, estrogens, process electrochemicaladvanced oxidation. |
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