Biosorption of Congo Red from aqueous solution by Bacillus weihenstephanensis RI12; effect of SPB1 biosurfactant addition on biodecolorization potency
| Autor: | Raouia Fendri, Dhouha Ghribi, Inès Mnif |
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| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Bacillus Bacillus subtilis Wastewater Waste Disposal Fluid Microbiology chemistry.chemical_compound Surface-Active Agents Adsorption Food science Coloring Agents Water Science and Technology Aqueous solution biology Biosorption Congo Red Bacillus weihenstephanensis Hydrogen-Ion Concentration biology.organism_classification Congo red Biodegradation Environmental chemistry Bacteria Water Pollutants Chemical |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 72(6) |
| ISSN: | 0273-1223 |
| Popis: | Bacillus weihenstephanensis RI12, isolated from hydrocarbon contaminated soil, was assessed for Congo Red bio-treatment potency. Results suggested the potential of this bacterium for use in effective treatment of Congo Red contaminated wastewaters under shaking conditions at acidic and neutral pH value. The strain could tolerate higher doses of dyes as it could decolorize up to 1,000 mg/l of Congo Red. When used as microbial surfactant to enhance Congo Red biodecolorization, Bacillus subtilis SPB1-derived lipopeptide accelerated the decolorization rate and maximized the decolorization efficiency at an optimal concentration of biosurfactant of about 0.075%. Studies ensured that Congo Red removal by this strain could be due to an adsorption phenomena. Germination potencies of tomato seeds using the treated dyes under different conditions showed the efficient biotreatment of the azo dye Congo Red especially with the addition of SPB1 biosurfactant. To conclude, the addition of SPB1 bioemulsifier reduced energy costs by reducing the effective decolorization period; the biosurfactant stimulated bacterial decolorization method may provide a highly efficient, inexpensive and time-saving procedure in the treatment of textile effluents. |
| Databáze: | OpenAIRE |
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