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Heavy Metal Tolerance Pattern of Textile Dye Degrading Native Bacteria: A Bioremediation Viewpoint


Tarequl Islam*, Md. Saifur Rahman and Md. Saddam Hussain

Background: Textile Industries are the major sector for social and economic perspective in Bangladesh that discharge huge number of dye stuff containing recalcitrant compounds, pigments and dye etc. into the water. Aim: The aim of this study is to isolate and identify the textile dye degrading bacteria from textile effluents and evaluation of their heavy metals resistant pattern. Methods and Materials: All the samples were collected from 8 distinct dye industry related places in Narayanganj District of Bangladesh. The isolated bacteria was characterized and identified by using cultural and biochemical techniques. The decolorization of dye was measured using spectrophotometer and the MIC of isolated bacteria against selected heavy metals’ salts was also determined by serial dilution method. Only 12 bacterial isolates of 6 species were isolated and identified based on Cultural and biochemical tests. One isolates of each species was selected for this study. Results: Pseudomonas spp. was the most effective decolorizers of textiles azo dyes than others bacterial species. All the isolates showed MIC against selected heavy metals ranging from 350-550 μg/ml where Bacillus spp., Micrococcus spp., and Pseudomonas spp. were found the most efficient heavy metal remover. Conclusion: These results signify that bacterial isolates that reside in industrial effluents could effectively be used in development of alternative and eco-friendly method for decolourization of textile dyes and removal of heavy metals from contaminated sites.

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Annals of Medical and Health Sciences Research The Annals of Medical and Health Sciences Research is a bi-monthly multidisciplinary medical journal.
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