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Synergetic effects for p-nitrophenol abatement using a combined activated carbon adsorption-electrooxidation process
Min-Hua Zhou1, Qi-Zhou Dai, Le-Cheng Lei
1Institute of Environmental Engineering, Zhejiang University, Hangzhou 310027, China. skynumen@163.com
Journal of Zhejiang University. Science
|November 18, 2004
Summary
A new reactor combines electrochemical oxidation and activated carbon fluidization to remove pollutants like p-nitrophenol. This synergistic process significantly enhances removal rates and allows for reusable activated carbon, showing promise for wastewater treatment.
Area of Science:
- Environmental Science
- Electrochemistry
- Chemical Engineering
Background:
- Biorefractory organic pollutants pose challenges for conventional wastewater treatment.
- Electrochemical oxidation and activated carbon adsorption are effective but often used separately.
- Developing integrated systems can improve efficiency and reduce costs.
Purpose of the Study:
- To develop and evaluate a novel fluidized electrochemical reactor for pollutant abatement.
- To investigate the synergistic effects of integrating activated carbon fluidization with electrochemical oxidation.
- To assess the removal efficiency of p-nitrophenol (PNP) and chemical oxygen demand (COD).
Main Methods:
- A single-cell reactor was designed integrating advanced electrochemical oxidation with activated carbon (AC) fluidization.
- The reactor was used to model the abatement of p-nitrophenol (PNP).
- Performance was evaluated based on PNP and COD removal rates and AC regeneration.
Main Results:
- AC fluidization enhanced COD removal by 22%-30%.
- The combined process showed significant synergistic effects, enhancing PNP removal by 137.8% and COD removal by 97.8%.
- Activated carbon was successfully regenerated electrochemically for reuse.
Conclusions:
- The integrated fluidized electrochemical reactor is a promising technology for treating biorefractory organic pollutants.
- Synergistic effects between electrochemical oxidation and AC fluidization lead to superior pollutant removal.
- The system's ability to regenerate AC offers a sustainable and cost-effective solution for wastewater treatment.