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