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Advanced Fenton processing of aqueous phenol solutions: a continuous system study including sonication effects
K C Namkung1, A E Burgess, D H Bremner
1Hub University for Industrial Collaboration, Seoul National University of Technology, 172 Gongneung 2-dong, Nowon, Seoul 139-743, South Korea.
Ultrasonics Sonochemistry
|May 8, 2007
Summary
The Advanced Fenton Process (AFP) effectively removes phenol from wastewater. Key factors influencing efficiency include hydrogen peroxide levels, flow rate, and initial phenol concentration, with higher sonication intensity improving TOC removal.
Area of Science:
- Environmental Chemistry
- Chemical Engineering
Background:
- Previous studies highlighted pH, hydrogen peroxide, and organic substances as critical factors in batch reactor Advanced Fenton Process (AFP).
- Commercialization potential necessitates understanding AFP in a flow-through system.
Purpose of the Study:
- To investigate the effects of process parameters on AFP efficiency in a laboratory-scale flow-through system.
- To optimize AFP for treating phenol in aqueous solutions.
Main Methods:
- Utilized the Taguchi experimental design method for systematic analysis.
- Measured Total Organic Carbon (TOC) removal as the primary indicator of oxidation efficiency.
- Investigated effects of pH, hydrogen peroxide supply, flow rate, initial phenol concentration, temperature, and sonication intensity.
Main Results:
- Phenol removal was similar at pH 2.0 and 2.5.
- Hydrogen peroxide supply and flow rate significantly impacted TOC removal.
- Higher initial phenol concentrations led to lower TOC removal rates.
- Temperature accelerated early-stage oxidation, but differences diminished after 90 minutes.
- Cup-horn sonication showed increased TOC removal with higher intensity, unlike bath sonication.
Conclusions:
- Process parameters like hydrogen peroxide, flow rate, and initial concentration are crucial for AFP efficiency in flow-through systems.
- Sonication intensity can enhance TOC removal, warranting further investigation.
- The study provides insights for optimizing AFP for industrial wastewater treatment.
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