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标题：Biodecolourisation of Azo Dye Reactive Red 22 by Bacillus infantis strain AAA isolated from Seawater and Toxicity Assessment of Degraded Metabolites
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作者：K. V. Bhaskara Rao ; A. S. Arun Prasad
期刊名称：Nature, Environment and Pollution Technology
印刷版ISSN：0972-6268
出版年度：2014
卷号：13
期号：2
语种：English
出版社：Technoscience Publications
摘要：Decolorization and degradation of Azo dye Reactive Red-22 (RR-22) by a bacterial strain isolated frommarine seawater and identified as Bacillus infantis sp. AAA was assessed. Maximum decolorization(95%) of RR-22 (100 mg/L) was achieved at pH 9, 37°C and 3% salt concentration under staticconditions in 6h. Various environmental characteristics such as pH, temperature, salt concentrationand dye concentration were analysed to determine the optimum decolorization conditions. Decolorizationanalysis was carried out by UV-vis spectrophotometer. The FTIR spectra showed the absence of–N=N– in the degraded sample. The HPLC chromatogram showed the presence of multiple peaks atdifferent retention times conforming degradation. The phytotoxicity results exhibited the toxic nature ofRR-22 compared to the less toxicity of degraded metabolites on seeds of Vigna mungo and Vignaradiata showing 30% and 20% germination..