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Updated: Nov 27, 2025
06:35
Implementation of a Hyperbolic Vortex Plasma Reactor for the Removal of Micropollutants in Water
Published on: July 25, 2025
635
Perfluorooctanoic acid (PFOA) removal by flotation with cationic surfactants
Yueh-Feng Li1, Wei-Yi Chien2, Yu-Jung Liu1
1Graduate Institute of Environmental Engineering, National Taiwan University, 71 Chou-Shan Rd., Taipei, 10673, Taiwan.
Chemosphere
|December 7, 2020
Summary
Cationic surfactants effectively remove perfluorooctanoic acid (PFOA) from water using foam flotation. Surfactants with alkyl chains similar in length to PFOA showed the highest removal efficiency, offering a fast and energy-efficient solution.
Area of Science:
- Environmental Chemistry
- Separation Science
- Water Treatment
Background:
- Perfluorooctanoic acid (PFOA) is a persistent environmental pollutant.
- Effective methods for PFOA separation and recovery from water are needed.
Purpose of the Study:
- To investigate the use of cationic surfactants in foam flotation for PFOA removal.
- To determine the optimal surfactant structure and conditions for efficient PFOA recovery.
Main Methods:
- Foam flotation process utilizing various cationic surfactants (OTAB, DTAB, CTAB, TBAB).
- Evaluation of PFOA removal efficiency based on surfactant type, alkyl chain length, ionic strength, and pH.
- Testing in actual wastewater under optimized conditions.
Main Results:
- PFOA removal efficiency followed the order: OTAB > DTAB > CTAB > TBAB, indicating higher affinity with similar alkyl chain lengths.
- Optimal removal achieved with 1.25 mM OTAB in 20 minutes in actual wastewater.
- Removal efficiency was less sensitive to pH but slightly decreased with increasing ionic strength.
Conclusions:
- Cationic surfactant-aided foam flotation is a highly efficient method for PFOA separation and recovery.
- The process is simple, fast, and energy-efficient compared to other methods.
- Surfactant structure, specifically alkyl chain length, is crucial for effective PFOA binding and removal.
Keywords:
Cationic surfactantEnergy yield value (G(50))Foam flotation processPerfluorooctanoic acid (PFOA)More Related Videos
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