Reactive dyes and textile effluent decolorization by a mediator system of salt-tolerant laccase from Peniophora cinerea

Moreira, Sérgio; Milagres, Adriane M. F.; Mussatto, Solange I.

doi:10.1016/j.seppur.2014.08.017

Cited by 38 publications

(21 citation statements)

References 37 publications

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“…This showed that the random formation of phenolic radicals may be channelled into a concerted dimerization. Different reaction conditions may favour polymerization or substitution and cleavage reactions depending on the type of laccase and mediator. No H 2 O 2 or other co‐substrates (except oxygen) are required for the action of laccases, while peroxidases, as used previously, depend on H 2 O 2 by definition.…”

Section: Resultsmentioning

confidence: 99%

The taste enhancer divanillin: a review on sources and enzymatic generation

Krings

Esparan

Berger

2015

Flavour & Fragrance J

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Dehydrodivanillin, the symmetrical dimer of vanillin, is a taste enhancer which imparts pleasant impressions of creaminess to food. Found in vanilla pods in traces only, a co‐substrate independent dimerization of vanillin, conducted in a co‐solvent system to improve the solubility of vanillin, was developed using iso‐active fungal laccases from Meripilus giganteus, Agaricus bisporus and Funalia trogii. The yields were compared with a peroxidase from Marasmius scorodonius (MsP2) and the reference enzyme horseradish peroxidase (HRP), both supplied with hydrogen peroxide. Using laccase catalysis, the kinetically preferred reaction product, 5,5'‐dehydrodivanillin, rapidly reached saturation and precipitated in situ, thus shifting the reaction equilibrium to the product. Yields of > 95 % were obtained with the high‐redox‐potential laccase of Funalia trogii, while HRP gave 18 %. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

The taste enhancer divanillin: a review on sources and enzymatic generation

Krings

Esparan

Berger

2015

Flavour & Fragrance J

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“…Laccase oxidizes redox mediators and creates unstable radicals. In the case of HBT, putative N-OH radicals are generate (MOROZOVA et al, 2007;MOREIRA et al, 2014). These radicals act by mechanism different from enzymatic one, namely radical mechanism.…”

Section: Phenol Redmentioning

confidence: 99%

Effect Of Metal Ions On Triphenylmethane Dye Decolorization By Laccase From Trametes Versicolor

Chmelová¹,

Ondrejovič²

2015

Nova Biotechnologica Et Chimica

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The aim of this study was investigate the influence of different metal ions on laccase activity and triphenylmethane dye decolorization by laccase from white-rot fungus Trametes versicolor. Laccase activity was inhibited by monovalent ions (Li+, Na+, K+ and Ag+) but the presence of divalent ions increased laccase activity at the concentration of 10 mmol/l. The effect of metal ions on decolorization of triphenylmethane dyes with different structures namely Bromochlorophenol Blue, Bromophenol Blue, Bromocresol Blue and Phenol Red was tested. The presence of metal ions (Na+, K+, Mg2+, Ca2+, Ba2+, Mn2+, Zn2+) slightly decreased triphenylmethane dye decolorization by laccase from T. versicolor except Na+ and Mg2+, which caused the increase of decolorization for all tested dyes. Decolorization of selected dyes showed that the presence of low-molecular-weight compounds is necessary for effective decolorization. Hydroxybenzotriazole (HBT) is the most frequently used. Although HBT belongs to most frequently used redox mediator and generally increase decolorization efficiency, so its presence decreased decolorization percentage of Bromophenol Blue and Bromochlorophenol Blue, the influence of metal ions to dye decolorization by laccase has the similar course with or without presence of redox mediator HBT.

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“…It is well known that reactive dyes have low degree of fixation on the textile fabric [11]. For any type of dying process, usually surfactants, inorganic salts and alkalis are required during dyeing process in order to fix the dye into fibre under suitable alkaline conditions [12][13]. 25 industria textila 2019, vol.…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly route for dyeing of cotton fabric using three organic mordants in reactive dyes

et al. 2019

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The textile dyes and fixing agents that used in dyeing process are major contributor to environmental pollution. In the present study, three different organic mordants (Sodium Citrate, Ammonium Acetate, and Potassium Acetate) are used in exhaust dyeing as mordants. Effect of mordant concentrations is studied on fastness properties (color change, rubbing fastness & light fastness) of cotton dyed with reactive dyes using these organic mordants. Comparison of these mordants with conventional fixing agent (NaCl) is also studied in order to evaluate the difference between fastness properties of conventional and organic salts used in this study. We found that the color fastness properties of conventional and organic salts are comparable, better in case of sodium citrate. Similarly color depth on fabric after dyeing with organic as well as inorganic salts is measured using data color. Results confirm that higher values of K/S are obtained for organic salts by using lower organic salt concentration compared to conventional salt. Reduction in total dissolved solids (TDS) of dye effluents is obtained from 6% to 29% for three organic salts as compared to conventional salt.

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Reactive dyes and textile effluent decolorization by a mediator system of salt-tolerant laccase from Peniophora cinerea

Cited by 38 publications

References 37 publications

The taste enhancer divanillin: a review on sources and enzymatic generation

The taste enhancer divanillin: a review on sources and enzymatic generation

Effect Of Metal Ions On Triphenylmethane Dye Decolorization By Laccase From Trametes Versicolor

Eco-friendly route for dyeing of cotton fabric using three organic mordants in reactive dyes

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