Pseudomonas sp. strain DY1 was newly isolated from soil with rotten wood and identified as a member of the genus Pseudomonas based on 16S rDNA and biochemical tests. Acid Black 172, a water soluble Cr-complex dye, was then selected as a model dye to investigate the decolorisation ability of the strain. It was observed that the growth of the strain was not inhibited by high dose of metal ions (10 mM), and efficient decolorisation was still observed when high concentrations of Fe2+, Fe3+ and Ca2+ existed. The optimal decolorising conditions obtained from Taguchi design were as follows: temperature 37˚C, pH 7.0, Fe3+ and proline concentrations of 7 mM and 3.0 g/L, respectively. Under the optimal conditions, 94.5% of Acid Black 172 (100 mg/L) could be decolorised by the strain in 24 h. The kinetics of the decolorisation best fitted the first order kinetic model (R2=0.981). Besides, the phytotoxicity study demonstrated a good detoxification by the strain. This work has a certain practical value in microbial decolorisation of textile wastewater.
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April 01 2011
Ecofriendly decolorisation of Cr-complex dye Acid Black 172 by a newly isolated Pseudomonas sp. strain DY1 Available to Purchase
Lin-Na Du;
Lin-Na Du
1College of Life Science Zhejiang University, 310058, Hangzhou, Zhejiang Province, China
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Sheng Wang;
Sheng Wang
1College of Life Science Zhejiang University, 310058, Hangzhou, Zhejiang Province, China
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Gang Li;
Gang Li
2Department of Agriculture and Biotechnology, Wenzhou Vocational College of Science and Technology, 325006 Wenzhou, Zhejiang Province, China
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Yu-Yi Yang;
Yu-Yi Yang
1College of Life Science Zhejiang University, 310058, Hangzhou, Zhejiang Province, China
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Xiao-Ming Jia;
Xiao-Ming Jia
1College of Life Science Zhejiang University, 310058, Hangzhou, Zhejiang Province, China
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Yu-Hua Zhao
1College of Life Science Zhejiang University, 310058, Hangzhou, Zhejiang Province, China
E-mail: [email protected]
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Water Sci Technol (2011) 63 (7): 1531–1538.
Citation
Lin-Na Du, Sheng Wang, Gang Li, Yu-Yi Yang, Xiao-Ming Jia, Yu-Hua Zhao; Ecofriendly decolorisation of Cr-complex dye Acid Black 172 by a newly isolated Pseudomonas sp. strain DY1. Water Sci Technol 1 April 2011; 63 (7): 1531–1538. doi: https://doi.org/10.2166/wst.2011.411
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