Results 141 to 150 of about 5,560 (186)

Bacterial Decolorization and Degradation of Azo Dyes

International Biodeterioration & Biodegradation, 2007
Color has always been a part of human life since long. All colorants, until the middle of nineteenth century, were of natural origin. Manufacturing of synthetic dyes started in 1856 and the first compound to be synthesized was aniline purple. By the beginning of the twenteeth century, synthetic dyes almost completely replaced natural compounds ...
Anjali Pandey, Poonam Singh, Leela Iyengar   +2 more
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The multihued palette of dye-decolorizing peroxidases

Archives of Biochemistry and Biophysics, 2015
Dye-decolorizing peroxidases (DyPs; EC 1.11.1.19) are heme enzymes that comprise a family of the dimeric α+β barrel structural superfamily of proteins. The first DyP, identified relatively recently in the fungus Bjerkandera adusta, was characterized for its ability to catalyze the decolorization of anthraquinone-based industrial dyes. These enzymes are
Rahul Singh, Lindsay D. Eltis
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Decolorization of azo dyes by Rhodobacter sphaeroides

Biotechnology Letters, 2003
Rhodobacter sphaeroides AS1.1737 decolorized more than 90% of several azo dyes (200 mg dyes l(-1)) in 24 h. The optimal culture conditions were: anaerobic illumination (1990 1x), peptone as carbon source, temperature 35-40 degrees C and pH 7-8. Intracellular crude enzyme from this strain had azoreductase activity, optimized temperature as 45-50 degrees
Zhi-yong, Song, Ji-ti, Zhou, Jing, Wang, Bin, Yan, Cui-hong, Du   +4 more
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Decolorization Of Textile Dye Solutions

Ozone: Science & Engineering, 1993
Results are presented on the use of ozone to decolorize textile dye solutions. The results describe the rates of reaction and the stoichiometry for the use of ozone to decolorize a simulated wastewater containing a bisazo acid dye (Acid Red 158). These rates of reaction are not sensitive to pH and are only mildly affected by temperature. The effects of
Julie Carrière, J. Peter Jones, Arthur D. Broadbent   +2 more
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Decolorization of an anthraquinone dye by the recombinant dye-decolorizing peroxidase (rDyP) immobilized on mesoporous materials

Journal of Molecular Catalysis B: Enzymatic, 2008
Abstract A recombinant dye-decolorizing peroxidase (rDyP) produced from Aspergillus oryzae is a novel peroxidase because of its unique tertiary structure. No conventional immobilization of rDyP has been successful. In this study, immobilization of rDyP was conducted using silica-based mesoporous materials, FSM-16 and AlSBA-15.
Mozaffar Shakeri, Makoto Shoda
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Decolorization of Azo Dyes in Bioelectrochemical Systems

Environmental Science & Technology, 2009
Azo dyes are ubiquitously used in the textile industry. These dyes need to be removed from the effluent prior to discharge to sewage due to their intense color and toxicity. In this study we investigated the use of a bioelectrochemical system (BES) to abioticlly cathodic decolorization of a model azo dye, Acid Orange 7 (AO7), where the process was ...
Mu, Yang, Rabaey, Korneel, Rozendal, Rene A., Yuan, Zhiguo, Keller, Jurg   +4 more
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Photocatalytic decolorization of wastewater dyes

Water Environment Research, 1994
ABSTRACT: 
The photocatalytic decolorization of municipal waste‐water contaminated with textile dyes was studied using a batch reactor. Degussa P25 titanium dioxide was used as the photocatalyst and proved to be effective for dye degradation when irradiated with UV light in the presence of air. In addition to removing the color from the wastewater, the
Robert J. Davis, John L. Gainer, Gilbert O'Neal, I‐Wen Wu   +3 more
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Enzymatic decolorization of sulfonphthalein dyes

Enzyme and Microbial Technology, 2005
Abstract The white rot fungus (WRF) Pleurotus ostreatus produced manganese peroxidase (MnP) and manganese-independent peroxidase (MIP) activities during solid state fermentation of wheat straw, a natural lignocellulosic substrate. Most of the sulfonphthalein (SP) dyes were decolorized by MnP at pH 4.0. The higher K m for meta -cresol purple (40 
R. Shrivastava, V. Christian, B.R.M. Vyas   +2 more
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Exploring new strains of dye-decolorizing bacteria

Journal of Bioscience and Bioengineering, 2012
This study unveiled a new strategy to explore new indigenous strains with excellent decolorization capabilities from freshwaters and seawaters. Two new bacterial decolorizers DX2b and SH7b, which have the capability to decolorize textile dyes, were isolated from Cross-Strait Taiwan and China. According to PCR-augmented 16S rRNA gene analyses for strain
Han, Jing-Long, Ng, I-Son, Wang, Yanni, Zheng, Xuesong, Chen, Wen-Ming, Hsueh, Chung-Chuan, Liu, Shi-Qi, Chen, Bor-Yann   +7 more
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Microbial Decolorization of Triphenylmethane Dyes

2014
Synthetic dyes belong to important class of organic compounds extensively used in textile, paper printing, color photography, leather, plastics, food, cosmetic, and pharmaceutical industries (Ali, Water Air Soil Poll 213:251–273, 2010; Rauf and Ashraf, Chem Eng J 209:520–530, 2012).
Anna Jasińska, Katarzyna Paraszkiewicz, Mirosława Słaba, Jerzy Długoński   +3 more
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