1. Biosorption of acidic textile dyestuffs from aqueous solution by Paecilomyces sp. isolated from acidic mine drainage.
- Author
-
Çabuk A, Aytar P, Gedikli S, Özel YK, and Kocabıyık E
- Subjects
- Adsorption, Azo Compounds analysis, Azo Compounds isolation & purification, Biodegradation, Environmental, Biomass, Coloring Agents analysis, Hydrogen-Ion Concentration, Industrial Waste analysis, Mining, Paecilomyces isolation & purification, Solutions chemistry, Spectroscopy, Fourier Transform Infrared, Sulfuric Acid Esters analysis, Sulfuric Acid Esters isolation & purification, Temperature, Turkey, Wastewater analysis, Wastewater chemistry, Wastewater microbiology, Coloring Agents isolation & purification, Paecilomyces metabolism, Textiles
- Abstract
Removal of textile dyestuffs from aqueous solution by biosorption onto a dead fungal biomass isolated from acidic mine drainage in the Çanakkale Region of Turkey was investigated. The fungus was found to be a promising biosorbent and identified as Paecilomyces sp. The optimal conditions for bioremediation were as follows: pH, 2.0; initial dyestuff concentration, 50 mg l(-1) for Reactive Yellow 85 and Reactive Orange 12, and 75 mg l(-1) for Reactive Black 8; biomass dosage, 2 g l(-1) for Reactive Yellow 85, 3 g l(-1) for Reactive Orange 12, 4 g l(-1) for Reactive Black 8; temperature, 25 °C; and agitation rate, 100 rpm. Zeta potential measurements indicated an electrostatic interaction between the binding sites and dye anions. Fourier transform infrared spectroscopy showed that amine, hydroxyl, carbonyl, and amide bonds were involved in the dyestuff biosorption. A toxicity investigation was also carried out before and after the biosorption process. These results showed that the toxicities for the reactive dyestuffs in aqueous solutions after biosorption studies decreased. The Freundlich and Langmuir adsorption models were used for the mathematical description of the biosorption equilibrium, and isotherm constants were evaluated for each dyestuff. Equilibrium data of biosorption of RY85 and RO12 dyestuffs fitted well to both models at the studied concentration and temperature.
- Published
- 2013
- Full Text
- View/download PDF