naa a22 4500 510749410 CHVBK 20180411083059.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11270-013-1672-4 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1672-4 Sequential Microaerophilic-Oxic Phase Mineralization of Azo Dyes by a Monoculture of Pseudomonas Aeruginosa Strain AWF Isolated from Textile Wastewater [Elektronische Daten] [Maryam Hafshejani, Chimezie Ogugbue, Norhashimah Morad] A novel dye degrading bacterium capable of decolorizing and mineralizing four different dyes (Methyl red, Orange II, Direct red 80, and Direct blue 71) was isolated from textile industrial wastewater using the selective enrichment technique. The bacterium was identified as Pseudomonas aeruginosa. More than 80% decolorization of Direct red 80 was obtained under microaerophilic conditions in 48h, whereas only 10% color removal was obtained under oxic conditions at the same time. Subsequent aeration of the decolorized medium resulted in the mineralization of the metabolic intermediates generated after azo bond cleavage by P. aeruginosa as confirmed by total organic carbon content and high-performance liquid chromatography analyses. The degradation products were characterized by Fourier transform infrared spectrometer and nuclear magnetic resonance techniques whereas the biotoxicity profile of the samples were evaluated using the brine shrimp lethality test assay. Data from this study provide evidence of dye mineralization and detoxification by a monoculture of P. aeruginosa in successive microaerophilic/oxic stages. Springer Science+Business Media Dordrecht, 2013 Azo dyes nationallicence Decolorization nationallicence Mineralization nationallicence Pseudomonas aeruginosa nationallicence Biotoxicity nationallicence Microaerophilic nationallicence Hafshejani Maryam Environmental Division, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia aut Ogugbue Chimezie Environmental Division, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia aut Morad Norhashimah Environmental Division, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia aut Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-16 0049-6979 224:9<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1672-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1672-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hafshejani Maryam Environmental Division, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia aut NATIONALLICENCE 700 1- Ogugbue Chimezie Environmental Division, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia aut NATIONALLICENCE 700 1- Morad Norhashimah Environmental Division, School of Industrial Technology, Universiti Sains Malaysia, Penang, Malaysia aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-16 0049-6979 224:9<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer