Biodegradability Combined processes Cyclic voltammetry Carbon felt electrode TiO2 Persulfate Tetracycline Ethanol Chemical oxidation Hydrophobic VOC Fermentation Electrochemical oxidation Fenton Ageing Water treatment Azo dyes Absorption Filtration Volatile organic compounds Biomass Biofiltration Azo dye Desalination Environment Electro-Fenton process Biological treatment Central composite design Mineralization Isotherms Adsorption DFT Activated sludge Metronidazole Fouling Continuous reactor Silicone oil Wastewater treatment Water Clofibric acid Kinetic Synergetic effect Antibiotics Mass transfer Graphite felt Ionic liquids Kinetic modeling Degradation Removal Modelling Air treatment Biogas Characterization H2S Biosorption Biodegradation Chemical scrubbing Advanced oxidation process Toluene Hydroxyl radicals Carbamazepine Sulfamethazine Nanofiltration Packing material Kinetics Fixed bed Heavy metals Cleaning Sorption Electroreduction Advanced oxidation processes Soil Organic solvent nanofiltration Magnetite Optimization Membrane Combined process Electro-Fenton Wastewater VOCs Microfiltration Isotherm Activated carbon Pesticides Ozone Photocatalysis Toxicity Mass-transfer Oxidation Electrocoagulation Response surface methodology Polyamide Ultrafiltration VOC Nanoparticles Methylene blue Dye Coupling process Hydrogen peroxide Modeling Dyes