Decolorisation of reactive dye wastewater and the effect of surfactants using laccase / Aiqin Hou in COLORATION TECHNOLOGY, Vol. 127, N° 3 (2011)  

[article]  inCOLORATION TECHNOLOGY > Vol. 127, N° 3 (2011) . - p. 200-204 Titre : Decolorisation of reactive dye wastewater and the effect of surfactants using laccase Type de document : texte imprimé Auteurs : Aiqin Hou, Auteur ; Xufang Zhang, Auteur Année de publication : 2011 Article en page(s) : p. 200-204 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs -- Biodégradation Eaux usées -- Epuration Laccases Les laccases (EC 1.10.3.2) appartiennent à une famille d'enzymes ayant pour cofacteur du cuivre. C'est une oxydase (oxydoréductase, EC 1) que l'on retrouve dans de nombreuses plantes, champignons et micro-organismes. Le cuivre est lié sur plusieurs sites de la protéine. On distingue trois types. Les types 2 et 3 sont appelés grappe tri-nucléaire. Le cuivre du type 1 est soluble dans l'eau. Le mercure déplace le cobalt complexé dans les laccases. Les complexants du cuivre peuvent le déplacer et le remplacer par du cobalt. Les cyanures complexent également le cuivre, mais dans ce cas il n'est pas possible de réinsérer du cobalt. Les laccases oxydent les dérivés phénoliques mais d'une façon ménagée qui transforme la lignine en monolignol. Surfactants Index. décimale : 667.3 Teinture et impression des tissus Résumé : Laccase (benzenediol, oxidoreducase; Enzyme Commission Number) is a multi-copper oxidase from biomass. Laccase enzyme recycling on molecular oxygen as an electron acceptor can be applied for the decolorisation of synthetic dyes. The decolorisation of 49 commercial reactive dyes using laccase was investigated. The effects of diverse structure surfactants on decolorisation are discussed. The absorption spectra of reactive dyes after a laccase biodegradable reaction were analysed. Reactive dyes based on anthraquinone and azo structures could be decolorised using the enzyme and their chemical structures broken. Reactive dyes based on an anthraquinone structure were easier to decolorise than those based on an azo structure. Surfactants could affect the decolorisation of dyes with an enzyme. The effect of nonionic surfactant on the decolorisation of anthraquinone dyes was the reverse. The cationic surfactant could improve the decolorisation rate of diazo dye. The effect of the anionic surfactant on dye decolorisation was small. Most commercial reactive dyes could be decolorised and biodegraded using a laccase enzyme under mild conditions. Laccase enzyme biotechnology has potential applications in the decolorisation of reactive dye wastewater. Note de contenu : EXPERIMENTAL : Materials - Determination of enzyme reaction conditions for reactive dyes, Lanasol Blue 3R and Cibacron Navy W-B - Effect of surfactants on decolorisation using laccase - Measurements of UV-visible spectra RESULTS AND DISCUSSION : Determination of enzyme reaction conditions for decolorisation - Effect of surfactants on enzyme decolorisation - Decolorisation properties of difference structure commercial reactive dyes DOI : 10.1111/j.1478-4408.2011.00299.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00299.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12199 [article]

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Degradation studies of CI Reactive Blue 19 on biodegraded cellulosic fabrics via liquid chromatography-photodiode array detection coupled to high resolution mass spectrometry / Nadia Sultana in COLORATION TECHNOLOGY, Vol. 135, N° 6 (12/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 6 (12/2019) . - p. 475-483 Titre : Degradation studies of CI Reactive Blue 19 on biodegraded cellulosic fabrics via liquid chromatography-photodiode array detection coupled to high resolution mass spectrometry Type de document : texte imprimé Auteurs : Nadia Sultana, Auteur ; Kelsey Williams, Auteur ; Mary Ankeny, Auteur ; Nelson R. Vinueza, Auteur Année de publication : 2019 Article en page(s) : p. 475-483 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie) Bleu (couleur) Colorants -- Analyse Colorants réactifs -- Biodégradation Colorants réactifs -- Détérioration Fibres cellulosiques Teinture -- Fibres textiles synthétiques Index. décimale : 667.2 Colorants et pigments Résumé : When textile substrates biodegrade in landfills, the fate of textile colorants is unknown, and potentially poses an ecotoxic threat. In this study, we developed a systematic analytical method to evaluate the biodegradation of reactive dyes, the most common class of dye applied to cotton fabrics. The cotton fabrics were dyed with CI Reactive Blue 19 and biodegraded in soil in a laboratory-controlled environment over intervals of 45 and 90 days. A dye isolation method using a low concentration of alkali (0.15% sodium hydroxide) was developed and applied (80°C for 1 hour) to isolate intact and degraded dye from the fabric samples. To quantify the intact dye isolated from the fabric samples, a quantification method was then developed using liquid chromatography-photodiode array detection. The quantification method provided excellent linearity (R2 = 0.9997 ± 0.0002), accuracy (% error = -2% ± 4), precision (% coefficient of variation = 2% ± 4) and sensitivity (lower limit of quantification = 0.4 ± 0.2 µg/mL) for concentrations ranging from 1 to 50 µg/mL. After validation, the method was applied and showed a reduction of dye in biodegraded samples (after 45 and 90 days) compared with undegraded control samples (0 days). To characterise the isolated dye degradation product, quadrupole time-of-flight tandem mass spectrometry was utilised. Analysis showed that the degradation product was formed by losing a -SO3- group from the intact hydrolysed form of the dye, creating a more hydrophobic degradation product compared with the intact hydrolysed form of dye. Note de contenu : - EXPERIMENTAL : Materials and reagents - Biodegradation of dyes fabric samples - Dye isolation method - Synthesis of hydrolysed dye standard - Quantitative monitoring of degradation - RESULTS AND DISCUSSION : Characterisation of synthesised hydrolysed dye standard - Analysis of undegraded control sample - Validation of quantification method - Quantification of dyes on biodegraded samples DOI : 10.1111/cote.12440 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12440 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33379 [article]

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Efficacy of parthenium hysterophorus waste biomass compared with activated charcoal for the removal of CI Reactive Red 239 textile dye from wastewater / Shreyas Bapat in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 3 (06/2021) . - p. 234-250 Titre : Efficacy of parthenium hysterophorus waste biomass compared with activated charcoal for the removal of CI Reactive Red 239 textile dye from wastewater Type de document : texte imprimé Auteurs : Shreyas Bapat, Auteur ; Dipika Jaspal, Auteur ; Arti Malviya, Auteur Année de publication : 2021 Article en page(s) : p. 234-250 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Caractérisation Colorants -- Elimination Colorants réactifs -- Biodégradation Déchets végétaux -- Recyclage Eaux usées -- Epuration Isotherme d'adsorption Thermodynamique Index. décimale : 667.2 Colorants et pigments Résumé : In the quest to find an eco-friendly, cost-effective and efficient alternative to expensive and non-biodegradable activated charcoal (AC), in the current study the potential of a weed, parthenium hysterophorus (PH), has been explored as a bio-adsorbent for purification of textile wastewater. Root, stem and leaves of PH weed have been used as bio-adsorbents in raw and surface-treated forms and compared with AC for removal of toxic textile dye CI Reactive Red 239 (Remazol Brilliant Red 3BS [RBR 3BS]) from wastewater. The surface treatment carried out using QAS (N-Cetyl-N,N,N–trimethylammonium bromide) in the current study is a novel way to enhance the dye adsorption capacity of raw adsorbents of PH. Characterisation tools like Fourier Transform–infrared spectroscopy, scanning electron microscopy, elemental analysis and potential of zero charge have been used to confirm the surface treatment. The impact of various process variables like pH, dosage of adsorbent, contact time, solution temperature and dye concentration have been studied. Isothermal, kinetic and thermodynamics modelling for adsorption data have been thoroughly investigated to ascertain the mechanism of adsorption. Statistical error functions like root mean square error, chi-square test, sum of absolute error and normalized standard deviation (NSD) have been used to validate the adsorption data. Results revealed that novel surface treatment significantly improved the dye adsorption capacity of raw PH adsorbents (ca. 15-16 times). Of all the weed bio-adsorbents, surface-treated PH stem showed the highest dye adsorption capacity (105 mg/g), which was 10-folds greater than commercial grade AC (10.4 mg/g at 27°C). For both adsorbents, surface-treated PH stem and AC, adsorption followed pseudo-second order kinetics, and the Langmuir isotherm was the best fit with film diffusion as a rate-controlling step. Thermodynamic parameters infer the spontaneous and exothermic nature of adsorption. Therefore, in the current study, surface-treated PH stem bio-adsorbent has been revealed as a superior alternative to AC for the removal of RBR 3BS dye from wastewater, opening a new gateway to the utilisation of waste weeds for the purpose of wastewater treatment. Note de contenu : - MATERIALS AND METHODS : Preparation of raw adsorbent material - Adsorbate - Initial experiments - Activation studies and proposed adsorption mechanism - Characterisation of untreated and treated adsorbents - Adsorption studies - System kinetics - Adsorption isotherms - Thermodynamics - Statistical error analysis - RESULTS AND DISCUSSION : Characterisation of untreated and treated adsorbents - Preliminary investigations - Impact of various physiochemical process variables for deciding the optimum adsorption parameters - Isothermal investigation - Kinetic modelling - Thermodynamics studies - Comparison of the obtained results with other PH adsorbents - Table 1 : Adsorption isotherm constants and statistical error parameters for the treated adsorbents under testing - Table 2 : Kinetic constants and statistical error parameters for the treated PH stem adsorbent and AC - Table 3 : Comparison of maximum adsorption capacity for experimental results and reported literature results DOI : https://doi.org/10.1111/cote.12526 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12526 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36090 [article]

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Identification and quantification of CI Reactive Blue 19 dye degradation product in soil / Chengcheng Fen in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 3 (06/2021) . - p. 251-258 Titre : Identification and quantification of CI Reactive Blue 19 dye degradation product in soil Type de document : texte imprimé Auteurs : Chengcheng Fen, Auteur ; Xinyi Sui, Auteur ; Mary Ankeny, Auteur ; Nelson R. Vinueza, Auteur Année de publication : 2021 Article en page(s) : p. 251-258 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie) Bleu (couleur) Caractérisation Colorants réactifs -- Biodégradation Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Essais (technologie) Extraction (chimie) Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Landfills are becoming the most common way to dispose textiles. The presence of different types of dyes and finishes on textiles fabrics can become an important source of pollution during the degradation process, due to the fact that these chemicals can leach to the soil. The biodegradation of dyes from dyed fabrics is not fully understood, and what can leach into the soil can be more toxic. In this study, cotton fabrics were dyed with CI Reactive Blue 19 (RB19) and biodegraded in soil in a laboratory-controlled environment for a 90-day time interval by using the ASTM D 5988-18 method. A modified QuEChERS (quick, easy, cheap, effective, rugged, and safe) extraction method, in combination with liquid chromatography-mass spectrometry (LC-MS) analysis, was applied to soil containing RB19 after the degradation process. An unknown degradation product, with a mass-to-charge ratio (m/z) of 393, found in the soil was characterised and confirmed, via high-resolution MS and tandem MS, to be CI Acid Blue 25 (AB25). To quantify the confirmed unknown product extracted from the degraded soil sample, a quantitation method was developed using high-performance liquid chromatography-diode array detector-mass spectrometry (HPLC-DAD-MS). The quantitation method provided excellent linearity (R2 = 0.9990 ± 0.0006), accuracy (mean percentage error = 5.17 ± 1.88), precision (mean percentage coefficient of variation = 4.73 ± 4.16), and sensitivity (lower limit of quantitation = 1.29 ± 0.47 µg/mL) for nine concentrations ranging from 0.5 to 40 µg/mL. Note de contenu : - EXPERIMENTAL : Materials and reagents - Product extraction via QuEChERS method - Detection and structural elucidation of RB19 degradation products - Quantification of standard AB25 spiked from blank soil - RESULTS AND DISCUSSION : Detection and structural elucidation of RB19 degradation products from soil - Quantification of standard AB25 dye solutions - Table 1 : The results of intra- and inter-day accuracy and precision of each concentration point of standard CI Acid Blue 25 (aB25) evaluated by liquid chromatography-diode array detector-mass spectrometry (LC-DAD-MS) method - Table 2 : Summary of validation parameters on standard CI Acid Blue 25 (AB25) quick, easy, cheap, effective, rugged, and safe (QuEChERS) quantification method DOI : https://doi.org/10.1111/cote.12527 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12527 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36091 [article]

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