Activated carbon Activated carbon treatment 2 Adsorption 2 Azo dyes Wastewater treatment 2 Activation agent 1 Activation time 1 Adsorption capacities 1 Adsorption kinetics and isotherm 1 Aromatic compounds 1 Batch reactors 1 Benzene 1 Biochar 1 Cationic and anionic dyes 1 Chemical activation 1 Chemicals removal (water treatment) 1 Corn grain 1 Crystalline materials 1 Crystalline porous materials 1 Deoxynivalenol 1 Dye removal 1 Dyes 1 Grain (agricultural product) 1 High specific surface area 1 Ion exchange 1 Metal organic framework 1 Methylene Blue 1 Molecular mass 1 Organic polymers 1 Organometallics 1