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Biodegradation of Brown 706 Dye by Bacterial Strain Pseudomonas aeruginosa

Department of Microbiology, Abbottabad University of Science and Technology, Havelian 22010, Pakistan
Department of Biochemistry, University of Malakand, Chakdara Dir Lower 18800, Pakistan
Division of Applied Life Science (BK21 Plus), IALS, Gyeongsang National University, Jinju 52828, Korea
Institute of Chemistry, University of Tartu, 14a Ravila St., 50411 Tartu, Estonia
Authors to whom correspondence should be addressed.
Academic Editor: Chao Yang
Water 2021, 13(21), 2959;
Received: 9 October 2021 / Revised: 14 October 2021 / Accepted: 18 October 2021 / Published: 20 October 2021
(This article belongs to the Special Issue Water Treatment by Adsorption and Catalytic Methods)
Dyes are the most challenging pollutants for the aquatic environment that are not only toxic, but also interfering photosynthesis as light penetration into deep water is changed. A number of methods are used for the water reclamation, however, among them biological methods are preferably used due to their compatibility with nature. In the present research, 15 different bacterial strains were used to decolorize Brown 706 dye. Among the bacterial strains, Pseudomonas aeruginosa showed maximum decolorization activity; hence in the subsequent experiments Pseudomonas aeruginosa was used. First the decolorization activities were carried out under different physicochemical conditions to obtain the optimum decolorization benefits of the selected microorganism. The optimum conditions established were 37°C, pH of 7 and operation cycle time 72 h. In the subsequent experiment all optimum conditions were combined in a single experiment where 73.91% of decolorization efficiency was achieved. For the evaluation of metabolites formed after decolorization/degradation the aliquots containing bacteria were homogenized, filtered and then subjected to extraction. The extracted metabolites were then subjected to the silica gel column isolation. UV–Vis, FTIR, and NMR techniques were used to elucidate structures of the metabolites. Out of the collected metabolites only P-xylene was identified, which has been formed by cleavage of azo linkage by azo reductase enzyme of bacteria following the deamination and methylation of nitro substituted benzene ring. View Full-Text
Keywords: biodegradation; Brown 706 dye; Pseudomonas aeruginosa; textile wastewater biodegradation; Brown 706 dye; Pseudomonas aeruginosa; textile wastewater
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MDPI and ACS Style

Khan, A.U.; Rehman, M.U.; Zahoor, M.; Shah, A.B.; Zekker, I. Biodegradation of Brown 706 Dye by Bacterial Strain Pseudomonas aeruginosa. Water 2021, 13, 2959.

AMA Style

Khan AU, Rehman MU, Zahoor M, Shah AB, Zekker I. Biodegradation of Brown 706 Dye by Bacterial Strain Pseudomonas aeruginosa. Water. 2021; 13(21):2959.

Chicago/Turabian Style

Khan, Asad Ullah, Mujaddad Ur Rehman, Muhammad Zahoor, Abdul Bari Shah, and Ivar Zekker. 2021. "Biodegradation of Brown 706 Dye by Bacterial Strain Pseudomonas aeruginosa" Water 13, no. 21: 2959.

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