Abstract
In recent years, new advanced oxidation processes based on the electrochemical technology, the so-called electrochemical advanced oxidation processes (EAOPs), have been developed for the prevention and remediation of environmental pollution, especially focusing on water streams. These methods are based on the electrochemical generation of a very powerful oxidizing agent, such as the hydroxyl radical (•OH) in solution, which is then able to destroy organics up to their mineralization. EAOPs include heterogeneous processes like anodic oxidation and photoelectrocatalysis methods, in which •OH are generated at the anode surface either electrochemically or photochemically, and homogeneous processes like electro-Fenton, photoelectro-Fenton, and sonoelectrolysis, in which •OH are produced in the bulk solution. This paper presents a general overview of the application of EAOPs on the removal of aqueous organic pollutants, first reviewing the most recent works and then looking to the future. A global perspective on the fundamentals and experimental setups is offered, and laboratory-scale and pilot-scale experiments are examined and discussed.
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- ACP:
-
3-Amino-6-chloropyridazine
- ADE:
-
Air diffusion electrode
- AMI:
-
3-Amino-5-methylisoxazole
- AO:
-
Anodic oxidation
- AOP:
-
Advanced oxidation process
- BDD:
-
Boron-doped diamond
- BZQ:
-
p-Benzoquinone
- CF:
-
Carbon felt
- CNT:
-
Carbon nanotube
- COD:
-
Chemical oxygen demand (mg of oxygen L−1)
- DSA:
-
Dimensionally stable anode
- e − :
-
Electron
- e − CB :
-
Electron in the conduction band
- E anod :
-
Anodic potential (V)
- EAOP:
-
Electrochemical advanced oxidation process
- E cat :
-
Cathodic potential (V)
- EF:
-
Electro-Fenton
- GC-MS:
-
Gas chromatography coupled to mass spectrometry
- h :
-
Planck constant (6.626 × 10−34 m2 kg/s)
- HPLC:
-
High-performance liquid chromatography
- h + VB :
-
Positively charged vacancy or hole in the valence band
- MMO:
-
Mixed metal oxides
- PEC:
-
Photoelectrocatalysis
- PEF:
-
Photoelectro-Fenton
- R:
-
Organic compound
- ROS:
-
Reactive oxygen species
- RVC:
-
Reticulated vitreous carbon
- SE:
-
Sonoelectrochemistry
- SPEF:
-
Solar photoelectro-Fenton
- TOC:
-
Total organic carbon (mg of carbon L−1)
- US:
-
Ultrasounds
- ))):
-
Ultrasounds
- λ :
-
Wavelength (nm)
- ν :
-
Frequency (Hz)
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Sirés, I., Brillas, E., Oturan, M.A. et al. Electrochemical advanced oxidation processes: today and tomorrow. A review. Environ Sci Pollut Res 21, 8336–8367 (2014). https://doi.org/10.1007/s11356-014-2783-1
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DOI: https://doi.org/10.1007/s11356-014-2783-1