Decolorization of Some Textile Dyes Using Phormidium sp. in Heterotrophıc Culture Conditions

Abstract

During the last decates, Cyanobacteria are promising potential bioresources candidates that have garnered attention because of their potential applications in biotechnology. In the present study, the decolorization of Dianix Blue CC, Benazol Black Zn and Dianix Yellow Brown CC with three different initial dye concentrations between 25, 50 and 100 mg/L, by the low-cost biosorbent Phormidium (Cyanobacteria) was investigated under heterotrophic conditions. The carbon source, incubation time, temperature, pH and agitation rate were 10 g/L glucose, 168 h, 40 oC, 8.5 and 60 rpm, respectively, for the optimum dye decolorization. Phormidium sp. showed high dye uptake, with maximum efficiency ranging from 20% to 40% (5.47 to 40.04 mgg-1) for Dianix Blue, 22% to 52% (5.95 to-52.32 mgg-1) for Benazol Black ZN and 20% to 68% (13.18 to-20.78 mgg-1) for Dianix Yellow Brown under heterotrophic conditions at all dye concentrations tested. The best color decolorization in terms of maximum efficiency was obtained 57% (57.76 mgg-1) for Dianix Blue, 74% (74.04 mgg-1) for Benazol Black at 100 mg/L and 77% (19.42 mgg-1) for Dianix Yellow Brown at 25 mg/L dye concentrations. The study reveals that the decolorization of dye process using Phormidium sp. offers an efficient, quit of charges and environmentally friendly biosorbent for the remediation of textile effluents.