title: Degradation and mineralization of azo dye reactive blue 222 by sequential Photo-Fenton's oxidation followed by aerobic biological treatment using white rot fungi.
abstract: A two stage sequential Photo-Fenton's oxidation followed by aerobic biological treatment using two white rot fungi P. ostreatus IBL-02 (PO) and P. chrysosporium IBL-03 (PC) was performed to check decolorization and to enhance mineralization of azo dye Reactive Blue 222 (RB222). In the first stage, selected dye was subjected to Photo-Fenton's oxidation with decolorization percentage ≈90 % which was further increased to 96.88 % and 95.23 % after aerobic treatment using two white rot fungi P. ostreatus IBL-02 (PO) and P. chrysosporium IBL-03 (PC), respectively. Mineralization efficiency was accessed by measuring the water quality assurance parameters like COD, TOC, TSS and Phenolics estimation. Reduction in COD, TOC, TSS and Phenolics were found to be 95.34 %, 90.11 %, 90.84 % and 92.22 %, respectively in two stage sequential processes. The degradation products were characterized by UV-visible and FTIR spectral techniques and their toxicity was measured. The results provide evidence that both fungal strains were able to oxidize and mineralize the selected azo dye into non-toxic metabolites.
authors.affiliation: Department of Applied Chemistry, Government College University, Faisalabad, 38000, Pakistan. saba_kirran@yahoo.com
authors.forename: Shumaila
authors.initials: S
authors.lastname: Kiran
authors.forename: Shaukat
authors.initials: S
authors.lastname: Ali
authors.forename: Muhammad
authors.initials: M
authors.lastname: Asgher
mesh_terms: D000332:Aerobiosis; D001391:Azo Compounds / Q000378:metabolism*; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D004396:Coloring Agents / Q000378:metabolism*; D006861:Hydrogen Peroxide / Q000378:metabolism*; D007501:Iron / Q000378:metabolism*; D008903:Minerals / Q000378:metabolism*; D010084:Oxidation-Reduction; D020075:Phanerochaete / Q000378:metabolism*; D010782:Photolysis; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; C045076:Fenton's reagent; D008903:Minerals; D006861:Hydrogen Peroxide; D007501:Iron