Eco-friendly biodegradation of a reactive textile dye Golden Yellow HER by Brevibacillus laterosporus MTCC 2298 |
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| Authors: | Sushama S. Gomare Dhawal P. Tamboli Anuradha N. Kagalkar Sanjay P. Govindwar |
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| Affiliation: | 1. Department of Biochemistry, Shivaji University, Kolhapur, 416004, India;2. Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, China;3. Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul, 04763, South Korea;4. Department of Physics, Shivaji University, Kolhapur, 410006, India;1. Department of Agriculture and Biotechnology, Wenzhou Vocational College of Science and Technology, 325006 Wenzhou, Zhejiang, PR China;2. College of Life Science, Zhejiang University, 310058 Hangzhou, Zhejiang Province, PR China;1. Environmental Microbiology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhavan 31, Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India;2. Department of Civil Engineering, Institute of Engineering and Technology, Lucknow, 226021, Uttar Pradesh, India |
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| Abstract: | Brevibacillus laterosporus MTCC 2298 showed 87% decolorization of Golden Yellow HER within 48 h under static condition at the concentration 50 mg l?1; however no significant change in the decolorization performance was observed under shaking condition. Decolorization performance was maximum (74%) at the pH 7.0 and 30 °C. TLC and HPLC analysis confirmed the biodegradation of Golden Yellow HER. Biodegradation pathway was proposed using GC–MS and FTIR spectral analysis. Mainly elected metabolites are the 2,5-Dichloro-4 (3-hydrazino-2-hydroxy cyclopentylamino-) dibenzene-sulfonic acid (peak 1, m/z = 526), 4-(3-hydrazino-2-hydroxy cyclopentylamino)-benzene-sulfonic acid (peak 2, m/z = 455), 4-(3-amino-2-hydroxy-cyclopentylamino)-benzene-sulfonic acid and 5-amino-cyclohex-3-ene-sulfonic acid (peak 3, m/z = 183). Phytotoxicity results suggested that degradation products of Golden Yellow HER are non-toxic to the common crops such as Sorghum vulgare and Phaseolus mungo. Also, degradation products are non-toxic to B. laterosporus as well as ecologically important bacteria like Pseudomonas aeruginosa and Azotobacter vinelandii. |
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