Adsorption 1 Adsorption isotherms 1 Adsorption reaction Batch adsorption experiments 1 Chitosan 1 Clay minerals 1 Langmuir isotherm models 1 Microwave irradiation 1 Microwave-enhanced synthesis 1 Montmorillonite 1 Montmorillonite composites 1 Pseudo second order kinetics 1 Stripping (dyes) 1 Sulfonated chitosans 1 Sulfonation 1 Thermodynamic studies 1 Wastewater and treatment 1 adsorption 1 dye 1 irradiation 1 montmorillonite 1 polymer 1 removal experiment 1 sulfonate 1 wastewater treatment 1