Degradation and detoxification of Navy Blue CBF dye by native bacterial communities: an environmental bioremedial approach

作者：Naseer Adil; Nosheen Sofia^*; Kiran Shumaila^*; Kamal Shagufta; Javaid Muhammad Asif; Mustafa Majid; Tahir Arifa

来源：Desalination and Water Treatment, 2016, 57(50): 24070-24082.

DOI：10.1080/19443994.2016.1138145

• Dye
• Decolorization
• Amendments
• COD
• TOC
• UV-visible spectral analysis
• FTIR

Twenty four bacterial strains having potential capability to decolorize and degrade textile dye Navy Blue CBF, were isolated from activated sludge samples; amassed from azo dye contaminated sites of a local textile Industry of Faisalabad. Out of these, three potent strains were selected owing to their great decolorization potential. Various parameters like dye concentration, pH, temperature, and incubation time period were optimized to develop maximum dye decolorization. The most suitable pH and temperature for selected bacterial strain were 6.0-7.5 and 30-35 degrees C, respectively, while dye concentration and incubation time were found to be 100ppm and 144 h, respectively. Against Navy Blue CBF dye, maximum decolorization activity obtained in this study was around 90% under the optimized conditions, using the dye as sole source of carbon and nitrogen. Effects of additional carbon (2-10mg/100mL) and nitrogen sources (2-10mg/100mL) on color removal potential were also evaluated. A decrease in decolorization potential of the bacterial strains with all the carbon sources (23-27% decolorization) and nitrogen sources (23-31% decolorization) was observed. Water quality parameters like total organic carbon (TOC) and chemical oxygen demand (COD) were measured before and after the microbial treatment of dye. Under optimum conditions, significant reduction in TOC and COD by three bacterial strains was noticed as compared to untreated ones. UV-vis and FTIR analyses were carried out before and after decolorization process which indicated the biodecolorization and biodegradation of Navy Blue CBF dye into nontoxic metabolites.

• 出版日期2016-10