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Electrochemical oxidation of bisphenol-A from aqueous solution using graphite electrodes
M Govindaraj1, R Rathinam, C Sukumar
1Department of Environmental Science, PSG College of Arts and Science, Coimbatore, India. mgrajchemist@yahoo.com
Electrochemical oxidation effectively removes bisphenol-A (BPA) from water using graphite electrodes. Optimal conditions achieved 78.3% chemical oxygen demand removal, demonstrating a viable water treatment method.
Area of Science:
- Environmental Chemistry
- Electrochemistry
Background:
- Bisphenol-A (BPA) is an endocrine-disrupting chemical found in aqueous solutions, posing environmental and health risks.
- Effective removal of BPA from water is crucial for environmental protection and public health.
Purpose of the Study:
- To investigate the electrochemical oxidation of BPA in aqueous solutions using graphite electrodes.
- To determine the optimal conditions for BPA removal, including supporting electrolyte, pH, and current density.
Main Methods:
- Electrochemical oxidation using graphite electrodes.
- Monitoring BPA concentration via UV-vis spectra and chemical oxygen demand (COD).
- Analysis of energy consumption and SEM-EDAX for gas products.
Main Results:
- Sodium chloride (NaCl) was the most effective supporting electrolyte.
- Optimal conditions (0.05 M NaCl, pH 5.0, 12 mA cm(-2) current density, 120 min) yielded 78.3% COD removal.
- Energy consumption decreased with increasing NaCl concentration but increased with current density.
Conclusions:
- Electrochemical oxidation with graphite electrodes is an effective method for BPA degradation.
- Optimized parameters significantly enhance BPA removal efficiency.
- Understanding byproduct formation (O2, Cl2) is important for process optimization.
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