Optimal conditions Biosorption 4 Biosorption capacity 4 Dyes 4 Full factorial design 4 Kinetics 4 Pseudo-second order model 4 Solutions 4 Thermodynamics 4 kinetics 4 thermodynamics 4 Acid concentrations 2 Acid pretreatment 2 Algae 2 Antiviral activities 2 Antiviral activity 2 Aromatic compounds 2 Article 2 Bio-ethanol production 2 Bioethanol 2 Biohazards 2 Biosorption process 2 Brunauer emmett tellers 2 Carbonate minerals 2 Carrageenans 2 Cationic dyes 2 Central composite designs 2 Chemical analysis 2 Degradation 2 Desirability function 2