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Removal by an adsorbent resin of non-ionic surfactants used in tannery processes / A. Rozzi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 6 (11-12/2000)
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Titre : Removal by an adsorbent resin of non-ionic surfactants used in tannery processes Type de document : texte imprimé Auteurs : A. Rozzi, Auteur ; M. Antonelli, Auteur ; C. Angeretti, Auteur ; R. Mantovani, Auteur ; E. Scaglia, Auteur Année de publication : 2000 Article en page(s) : p. 266-270 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Déchets industriels -- Elimination
Eaux usées -- Décontamination
Eaux usées -- Teneur en surfactants
SurfactantsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A new process to remove non-ionic surfactants from tannery wastewater, using a bed of adsorbent synthetic resin, has been investigated at laboratory and pilot scale.
A small pilot column (V=2 litres) has been tested at a tannery in Northern Italy. The wastewater was filtered on a sand-bed and then fed to the adsorbent resin. The column operated at very short nominal residence time, lower than 7 minutes.
Non-ionic surfactants were monitored in the column influent and effluent. Two regeneration procedures were tested : hot water with soda nd solvent extraction by acetone. Only the latter was quite successful and allowed a complete recovery of the absorbate. More basic experiments were carried out at laboratory scale using synthetic solutions made of tap water and a non-ionic surfactant industrial product to evaluate equilibrium isotherms and adsorption kinetics. A first approximation economical evaluation of the process was also carried out.
The experimental results indicate that the removal of non-ionic surfactants from industrial wastewater (tannery effluent) by adsorbent resin is feasible and economically competitive.Note de contenu : - MATERIALS AND METHODS : Wastewater - Synthetic solution - Adsorbent resin - Adsorption column - Kinetic tests and equilibrium iso therms
- RESULTS AND DISCUSSION : Adsorption tests on pilot column
- Batch regeneration with soda
- Batch regeneration with acetone
- Kinetic tests and equilibrium isotherms
- Cost evaluation
- Table 1 : Main characteristics of the tannery WWTP effluent
- Table 2 : Main characteristics of the RMO2O resin
- Table 3 : Main operating parameters of adsorbent column during the two cycles
- Table 4 : Characteristics of the eluate and wash water for NaOH regneration
- Table 5 : Main results of acetone regeneration procedure on two samples of resin
- Table 6 : Values of kinetic constants K for the two resin granulometry fractions and for 30mg/l Sandozine initial concentration and correlation coefficient R2En ligne : https://drive.google.com/file/d/1zo480kXIyIH5FbluBImWv715v-jI2_mw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40817
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 6 (11-12/2000) . - p. 266-270[article]Removal of aromatic amines and decolourisation of azo dye baths by electrochemical treatment / VÃctor López-Grimau in COLORATION TECHNOLOGY, Vol. 129, N° 4 (08/2013)
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Titre : Removal of aromatic amines and decolourisation of azo dye baths by electrochemical treatment Type de document : texte imprimé Auteurs : VÃctor López-Grimau, Auteur ; Miquel Riera-Torres, Auteur ; Montserrat López-Mesas, Auteur ; Carmen Gutiérrez-Bouzán, Auteur Année de publication : 2013 Article en page(s) : p. 267–273 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amines Une amine est un composé organique dérivé de l'ammoniac dont certains hydrogènes ont été remplacés par un groupement carboné. Si l'un des carbones liés à l'atome d'azote fait partie d'un groupement carbonyle, la molécule appartient à la famille des amides. Découvertes en 1849, par Wurtz les amines furent initialement appelées alcaloïdes artificiels.
On parle d'amine primaire, secondaire ou tertiaire selon que l'on a un, deux ou trois hydrogènes substitués.
Par exemple, la triméthylamine est une amine tertiaire, de formule N(CH3)3.
Typiquement, les amines sont obtenues par alkylation d'amines de rang inférieur. En alkylant l'ammoniac, on obtient des amines primaires, qui peuvent être alkylées en amines secondaires puis amines tertiaires. L'alkylation de ces dernières permet d'obtenir des sels d'ammonium quaternaire.
D'autre méthodes existent : 1. Les amines primaires peuvent être obtenues par réduction d'un groupement azoture, 2. Les amines peuvent aussi être obtenues par la réduction d'un amide, à l'aide d'un hydrure, 3. L'amination réductrice permet l'obtention d'amines substituées à partir de composés carbonylés (aldéhydes ou cétones), 4. Les amines primaires peuvent être obtenues par la réaction de Gabriel.
Bains de teinture -- Epuration
Colorants azoïques
Composés aromatiques
Décoloration
Eaux usées -- Décontamination
Eaux usées -- Epuration
Electrochimie
Extraction (chimie)Index. décimale : 667.3 Teinture et impression des tissus Résumé : The presence of aromatic amines in effluent from dyeing processes of the textile industry is an added problem to the high coloration typical of this type of effluent. The main objective of the present work was to eliminate these two problems simultaneously by electrochemical treatment using bath solutions containing three azo dyes. For the analysis of amines, a liquid–liquid extraction method was developed as an easier and faster alternative to the method described in the standards and widely used in analytical laboratories. Four amines (aniline, o-toluidine, 4-chloroaniline and 4-aminobiphenyl) were detected by GC-MS in the residual azo dye baths. A total amine concentration of between 2.5 and 1 ppm was detected, 4-aminobiphenyl being the main compound. Both residual colour and amines were removed by electrochemical treatment carried out at three current densities (3, 24 and 40 mA/cm2). At 24 mA/cm2, more than 90% of colour removal was achieved, and the total amine concentration was reduced to below 0.15 ppm. DOI : 10.1111/cote.12021 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12021/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19038
in COLORATION TECHNOLOGY > Vol. 129, N° 4 (08/2013) . - p. 267–273[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15394 - Périodique Bibliothèque principale Documentaires Disponible Removal of chromium (III) from tannery wastewaters with acidophilic fungi / Joana Lalueza in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 1 (01/2014)
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Titre : Removal of chromium (III) from tannery wastewaters with acidophilic fungi Type de document : texte imprimé Auteurs : Joana Lalueza, Auteur ; Rita Puig, Auteur ; Antoni Ruis, Auteur ; Elena MartÃ, Auteur ; Joan F. MartÃ, Auteur ; Núria RodrÃguez, Auteur ; Ricardo Amils, Auteur Année de publication : 2014 Article en page(s) : p. 14-24 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Bases (chimie)
Biotechnologie
Champignons et constituants
Chrome trivalent
Chrome trivalent -- Absorption
Eaux usées -- Décontamination
Eaux usées -- Epuration
Eaux usées -- Recyclage
pHIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Conventional methods for chromium removal from industrial effluents may be limited by technological or economical constraints, especially when they are applied to dilute metal solutions. Thus, biotechnological processes, which are efficient at low metal concentrations and require the use of fewer chemicals, may play an important role. The chromium recovery proposed here is based on the specific uptake of this metal by acidophilic fungi. Fifty acidophilic fungal isolates from the RÃo Tinto basin, an extreme acidic environment, were tested. Most of them were resistant to Cr(III) and Cr(VI) solutions at concentrations up to 10 mmol/L. The influence of different experimental conditions was evaluated (medium concentration, kinetics, requirement of induction etc.). Fungal isolate 143 was able to remove 63% of Cr(III) at 0.1 mmol/L, 74% at 1 mmol/L and 21% at 10 mmol/L. These are the best Cr(III)-fungal-uptake results at acidic pH described in the literature so far. It should be possible to use these acidophilic fungi, for example in tannery wastewater, as they can resist chromium concentrations and pH values found in these effluents (between 6.5-7.5 mmol/L Cr (III) and pH as low as 3-4). Note de contenu : - EXPERIMENTAL SECTION : Conservation of the fungal isolates - Procedure to test the resistance and uptake capacity of fungal isolates : Resistance - Uptake capacity.
- RESULTS AND DISCUSSION : Resistance to Cr(III) and Cr (VI) profile of 50 acidic fungal isolates - Characterization of tannery wastewater - Systematic screening of resistance and specific uptake of Cr(III) - Cr(III) uptake tests with fungal isolates 128 and 143 : Experiments with different concentration of Yepd growth media - ph variation over time - Uptake kinetics. - Comparison of Results with those describedin the literatureEn ligne : https://drive.google.com/file/d/1O9XZmB4lRuhBnsLjCVSdvhUVyMd7aZ5n/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20139
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 1 (01/2014) . - p. 14-24[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15863 - Périodique Bibliothèque principale Documentaires Disponible A rescue of colors from dye-wastewater / Saloana Santina Gomes Santos in L'ACTUALITE CHIMIQUE, N° 444-445 (10-11/2019)
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Titre : A rescue of colors from dye-wastewater : a rescue of colors from dye-wastewater Type de document : texte imprimé Auteurs : Saloana Santina Gomes Santos, Auteur ; Francisco Rodrigues, Auteur ; Maria Gardênnia Fonseca, Auteur Année de publication : 2019 Article en page(s) : p. 22-28 Note générale : Bibliogr. Langues : Français (fre) Catégories : Argile
Colorants -- Adsorption
Eaux usées -- Décontamination
Eaux usées -- Epuration
Eaux usées -- Recyclage
Eaux usées -- Teneur en colorants
Montmorillonite
Photostabilité
PigmentsIndex. décimale : 667.2 Colorants et pigments Résumé : Contaminants such as dyes unproperly discharged in the environment are a big problem to overcome. Some technologies have been developed and applied for dye-wastewater treatment before its disposal in the waterbodies. Among them, adsorption is highlighted and a plenty of adsorbents are proposed in the literature.
This paper presents some clay minerals-based adsorbents applied for the rescue of colors from dye-wastewater, and the development of new pigments for artworks as an alternative to reuse the dyed adsorbents.Note de contenu : - Dyestuffs and the color paradox
- How to remove color from dye-wastewater ?
- The adsorption approaches
- How to characterize the adsorbents ?
- Custom-made clay-based solids for dye removal
- What about the adsorbents after dye removal ? How to discharge them ?
- Dyed adsorbent as new pigments
- Towards new stable and environmentally friendly pigments
- Fig. 1 : Treatment methods for the removal of dyes from wastewater effluent
- Fig. 2 :Adsorption process with adsorbent regeneration step for dyed-water decoloring
- Fig. 3 : Main analytical techniques for characterization of adsorbents
- Fig. 4 : Effect of the time in the dye removal for KSF-montmorillonite C12NH3+ hybrid
- Fig. 5 : KSF-montmorillonite/chitosan beads as adsorbent for Remazol blue dye
- Fig. 6 : Color variation of the hybrids as a function of the exchanged cation
- Fig. 7 : Solid pigments based on alizerin and carminic acid adsorbed onto Al-pillared clay and Ti-pillared clay and oil paint formulations based on these pigments before and after light irradiation
- Fig. 8 : Color of the pigments before and after 400 h under light exposure. Representation ageing of pigments followed by color change observations
- Table 1 : Some classification dyes based on chemical structure
- Table 2 : Examples of clay and clay-based solids as adsorbents for Remazol blue dyePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33040
in L'ACTUALITE CHIMIQUE > N° 444-445 (10-11/2019) . - p. 22-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21257 - Périodique Bibliothèque principale Documentaires Disponible Study of the cytotoxicity of reactive dyeing effluent treated by Fenton oxidation / Chung-Hin Chui in COLORATION TECHNOLOGY, Vol. 129, N° 6 (12/2013)
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Titre : Study of the cytotoxicity of reactive dyeing effluent treated by Fenton oxidation Type de document : texte imprimé Auteurs : Chung-Hin Chui, Auteur ; Kun-Wai Man, Auteur ; Wai-Fung Tsang, Auteur ; Pik-Ling Lam, Auteur ; Kelvin Sze-Yin Leung, Auteur ; Wai-Yeung Wong, Auteur ; Chi-Wai Kan, Auteur ; Kim-Hung Lam, Auteur Année de publication : 2013 Article en page(s) : p. 398-402 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs -- Détérioration
Décoloration
Eaux usées -- Décontamination
Fenton, Réaction de
Oxydation
Tests cutanés
Tests de toxicité
Toxicologie cellulaireIndex. décimale : 667.3 Teinture et impression des tissus Résumé : Fenton oxidative wastewater treatment of CI Reactive Black 5 and CI Reactive Blue 19 effluent was performed after a simulated laboratory-scale dyeing process, and the cytotoxicity of the treated effluent was evaluated using human skin cell lines. Among the components for Fenton oxidation, the human skin cell results showed that iron(II)sulfate at 150 mm did not show any significant cytotoxic effect, while other components, such as Glauber's salt solution (20 g l−1; 14%), CI Reactive Black 5 (30 mg l−1; 24%), caustic soda (5 g l−1; 30%), CI Reactive Blue 19 (30 mg l−1; 32%), hydrogen peroxide (0.01 m) and soda ash (5 g l−1) showed cytotoxic potential; the reagent sodium sulfite (30 mm; 48%) exhibited the strongest cytotoxicity level. Fast decolorisation (>95%) was achieved within 10 min for CI Reactive Black 5, while for CI Reactive Blue 19 it took longer (1.5 h) to achieve the same decolorisation. Studies showed that decolorisation for both dyes followed second-order kinetics. In spite of the remarkable efficacy of the Fenton oxidation process in removing colour within a short period of time, the resulting treated wastewater (within a reaction time of 1.5 h) also showed cytotoxicity towards the human HaCaT skin keratinocyte cell line. This observation can be explained by the strong oxidant and intermediate species produced during the advanced oxidation process, and a treatment step using sodium sulfite and a prolonged residence time can help to reduce the cytotoxicity. Note de contenu : - EXPERIMENTAL : Reagents and instruments - Laboratory-scale dyeing process - Cytotoxicity tests - Study of decolorisation kinetics
- RESULTS AND DISCUSSION : Study of dye decolorisation kinetics - Cytotoxicity testsDOI : 10.1111/cote.12055 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12055/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19738
in COLORATION TECHNOLOGY > Vol. 129, N° 6 (12/2013) . - p. 398-402[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15730 - Périodique Bibliothèque principale Documentaires Disponible Tannery effluent problems / K. W. Pepper in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXI (Année 1966)
PermalinkTannery effluent treatment updates / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 62 (11-12/2023)
PermalinkTannery wastewater treatment : conventional and promising processes, an updated 20-year review / Jun Zhao in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
PermalinkThe three pot solution for chromium, tannins and solid waste : Recovery and reuse technique for spent semi-chrome liquor and chrome shavings / Subramanian Saravanabhavan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 5 (09-10/2004)
PermalinkTotal dissolved solids management (TDS) in tanneries / A. Sahasranaman in WORLD LEATHER, Vol. 14, N° 7 (11/2001)
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