STATISTICAL DESIGN OF EXPERIMENTS FOR OPTIMIZATION OF BATCH ADSORPTION CONDITIONS FOR REMOVAL OF REACTIVE RED 194 TEXTILE DYE FROM AQUEOUS EFFLUENTS |
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| Authors: | Betina Royer Natali F. Cardoso Tatiana Calvete Roy E. Bruns |
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| Affiliation: | 1. Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS) , Porto Alegre, Brazil;2. Institute of Chemistry, State University of Campinas (UNICAMP) , Campinas, Brazil |
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| Abstract: | Factorial and central composite design experiments were performed to maximize the percentage removal of hydrolyzed reactive red 194 (HRR) from a simulated textile effluent by using Brazilian pine fruit wastes. Solution pH, initial dye concentration, contact time, and adsorbent mass levels were systematically varied for both untreated and acid-treated wastes. Biosorbent dosage of 9.0 g L?1, pH of 2.0, and at least 7–8 h contact time resulted in 98% dye removal for the acid-treated wastes and 88% for the untreated wastes. Adsorption isotherms were determined for both materials at the optimized conditions, and the equilibrium data was better fitted to the Sips isotherm model. |
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| Keywords: | Biosorption Brazilian pine fruit wastes Factorial design Response surface design Simulated textile effluent |
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