Adsorption 1 Adsorption and desorptions 1 Adsorption characteristic 1 Detergent Detergents 1 Indosol Dark-blue GL 1 Initial concentration 1 Langmuir isotherm models 1 Langmuir model 1 Langmuir models 1 Rate constants 1 Unified approach 1 Unified approach model 1 Water Hyacinth 1 Water hyacinth roots powder 1 adsorption 1 aqueous solution 1 desorption 1 detergent 1 pH 1 reaction kinetics 1