Adsorption 2 Chitosan 2 Microwave irradiation 2 Montmorillonite 2 Sulfonation 2 Wastewater and treatment ACTIVATED CARBON 1 ADSORBENTS 1 ADSORPTION PROPERTIES 1 Adsorption isotherms 1 Adsorption reaction 1 Batch adsorption experiments 1 CATIONIC DYE 1 COMPOSITE 1 Clay minerals 1 EFFICIENT ADSORPTION 1 HYDROGEL BEADS 1 Langmuir isotherm models 1 MICROSPHERES 1 Microwave-enhanced synthesis 1 Montmorillonite composites 1 NANOCOMPOSITES 1 ORANGE 1 Pseudo second order kinetics 1 Stripping (dyes) 1 Sulfonated chitosans 1 Thermodynamic studies 1 adsorption 1 dye 1 irradiation 1