| AOP | Advanced oxidation processes |
| HC | Hydrodynamic cavitation |
| IHC | Imping stream hydrodynamic cavitation |
| FO | Fenton oxidation |
| IS | Impinging stream |
| COD | Chemical oxygen demand |
| UV-Vis | Ultraviolet and visible spectrophotometry |
| GC–MS | Gas chromatography and mass spectrometry |
| UV254 | Absorbance of some organic compounds in water under UV light at 254 nm wave length |
| Vis380 | Absorbance of visible light at 380 nm |
| RSM | Response Surface Methodology |
| ANOVA | Analysis of Variance |
| 2-D | Two-dimensional |
| CCD | Central composite design |
| Co | Initial concentration of pollutants |
| Cf | Concentration of pollutant after treatment |
| OC | Operating costs |
| ROS | Reactive oxygen species |
| EPR | Electron paramagnetic resonance |
| 3D-EEM | Three-dimensional excitation-emission matrix spectroscopy |
| SOA | Synchronized oxidation–adsorption |
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