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Immobilized micro-organism in mesoporous activated carbon for treatment of tannery waste water in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)
[article]
Titre : Immobilized micro-organism in mesoporous activated carbon for treatment of tannery waste water Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 472-480 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charbon actif
Eaux usées -- Recyclage
Matériaux mésoporeux
Recyclage (déchets, etc.)
TannageIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Chemo-Autotrophic Activated Carbon Oxidation (CAACO) system was used for the treatment of tannery waste water. It employs activated carbon-immobilised sulphate reducing bacteria for the removal of dissolved organics in wastewater under oxidizing environment. The wastewater characteristics such as COD (1689 mg/L), BOD (377 mg/L), sulphate (915 mg/L) and sulphide (184 mg/L) were applied at an hydraulic loading rate of 0.7376 m3/m3/day and surface loading rate of 0.2438 m3/m2/day to CAACO reactor at 30°C and at atmospheric pressure. The removal of COD, BOD, sulphide and sulphate was 87%, 96%, 100% and 40% respectively after 2 hours of oxidation. The oxidation of dissolved organics in wastewater was accomplished by passing air at flow rate 3 L/min and at pressure 0.5 kg/cm2 through CAACO reactor. The effect of variables COD loading, O2/COD, O2/(COD-BODL), COD/S2–, (COD-BODL)/S2– and [(COD-BODL)i–(COD-BODL)e]/S2– on rate and percentage removal of COD from tannery wastewater was determined. Note de contenu : - MATERIALS AND METHODS : Source of raw wastewater - Primary clarification - Anaerobic digester and sand filtration - Upflow anaerobic filter (UAF) - Sand filter - Chemo autotrophic activated carbon oxidation (CAACO) reactor - Isolation and identification of bacterial species - Immobilisation of the isolated species
- RESULTS AND DISCUSSION : Characteristics of wastewater - Upflow anaerobic reactor - Chemo autotrophic activated carbon oxidation (CAACO) reactorDOI : 10.3139/113.110219 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16534
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 472-480[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14334 - Périodique Bibliothèque principale Documentaires Disponible Investigation on treatment of tannery effluent through ozonation / Vasudevan Preethi in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 9 (09/2009)
[article]
Titre : Investigation on treatment of tannery effluent through ozonation Type de document : texte imprimé Auteurs : Vasudevan Preethi, Auteur ; K. Iyappan, Auteur ; N. Balasubramanian, Auteur ; C. Srinivasakannan, Auteur Année de publication : 2009 Article en page(s) : p. 302-307 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biodégradation
Cinétique chimique
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Eaux usées -- Epuration
Eaux usées -- Recyclage
OzonationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Experiments were conducted on treatment of leather effluent by ozonation covering wide range in operating conditions. The influence of parameters such as influent pH, ozone flow rate and initial effluent concentration on ozonation efficiency has been critically examined. A maximum of COD removal efficiency of 92% has been achieved under optimum operating conditions. The ozonation of leather effluent has been modeled using pseudo first order kinetics. It has been observed from the present investigation that the biodegradability index of the tannery effluent has increased from an initial value of 0.18 to 0.49 due to ozonation indicating favorable adaptation of the technique as primer for biochemical methods. En ligne : https://drive.google.com/file/d/1DBR_2hghY86GXUypvjjNjgaJSIuvMA5y/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17834
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 9 (09/2009) . - p. 302-307[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011556 - Périodique Bibliothèque principale Documentaires Disponible 011557 - Périodique Bibliothèque principale Documentaires Disponible Lower footprint by best available technologies / W. Scholz in LEATHER INTERNATIONAL, Vol. 214, N° 4826 (11-12/2012)
[article]
Titre : Lower footprint by best available technologies Type de document : texte imprimé Auteurs : W. Scholz, Auteur ; T. Huang, Auteur ; K. Hill, Auteur Année de publication : 2012 Article en page(s) : p. 46-48 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bioréacteurs
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Eaux usées -- Recyclage
Eaux usées -- Stations de traitements
Economies d'énergie
Efficacité énergétique
Gaz à effet de serre -- Réduction
Membranes (technologie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Measurements to reduce the carbon footprint have become increasingly important to improve the competitiveness of tanneries as well as improve the public perception. It is also useful to fulfil the requirements of new regulations such as the Chinese energy reduction plan for light industry of 20% by 2015.
W2O environment has implemented new technologies at Simona Tanning, which have been selected according to Best Available Technology (BAT) by reducing energy consumption and increasing the treatment efficiency and effluent quality. Simona Tanning is a pioneer implementing BAT for highly efficient tannery effluent treatment, generating lowest possible carbon emissions, and can be considered to operate the best performing tannery effluent treatment plant in China.Note de contenu : - Balancing
- Primary treatment using dissolved air flotation
- Biological treatment
- Membrane bioreactor (MBR) and reverse osmosis (RO)
- Sludge handling and drying
- Reed beds
- Fenton process
- Results
- Fig. 1 : Overview of treatment plant configuration
- Fig. 2 : Membrane bioreactor with submerged membranes
- Table 1 : Effluent treatment plant performance
- Table 2 : Energy performanceEn ligne : https://drive.google.com/file/d/1e4PbPg9xL60RJl5g7o67Z_JvCLuhY25j/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35472
in LEATHER INTERNATIONAL > Vol. 214, N° 4826 (11-12/2012) . - p. 46-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14409 - Périodique Bibliothèque principale Documentaires Disponible Natural sunlight assisted bentonite-ZnO mixed oxide catalyst for organic pollutant removal in leather post tanning wastewater with solar reactor / E. T. Deva Kumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 8 (08/2018)
[article]
Titre : Natural sunlight assisted bentonite-ZnO mixed oxide catalyst for organic pollutant removal in leather post tanning wastewater with solar reactor Type de document : texte imprimé Auteurs : E. T. Deva Kumar, Auteur ; Sathya Ramalingam, Auteur ; K. Thirumalai, Auteur ; Rathinam Aravindhan, Auteur ; M. Swaminathan, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2018 Article en page(s) : p. 241-247 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bentonite La bentonite est une argile colloïdale dont le nom vient de Fort Benton dans le Wyoming aux États-Unis. Connue aussi sous le terme de terre à foulon, elle peut être considérée comme une smectite, étant essentiellement constituée de montmorillonite (Na,Ca)0.33(Al,Mg)2Si4O10(OH)2·(H2O)n.(80 %) et d'argile ce qui explique sa capacité de rétention d'eau. On trouve également d'autres minéraux comme le quartz, le mica, le feldspath, la pyrite ou la calcite. Les gisements de bentonites sont d'origines volcanique et hydrothermale.
Elle possède diverses propriétés. Notamment, elle absorbe les protéines, réduit l’activité des enzymes. Les boues bentonitiques (recelant une fraction de bentonite) sont utilisées dans les travaux de terrassement, de parois moulées, du fait de leur capacité à laisser la place rapidement et facilement aux bétons coulés à leur place. Elles peuvent être ajoutées au compost.
Le numéro CAS de la bentonite est 1302-78-9.
Il existe deux types de bentonites :
La bentonite à base de sodium, qui augmente de volume lorsqu'elle est humide et qui peut absorber plusieurs fois sa masse en eau. Cette propriété est mise en valeur dans les mastics pour l'enfouissement de matières polluantes dans le sol. Elle est utilisée dans les puits de forage de pétrole et la recherche géothermique.
La bentonite à base de calcium (pascalite), qui ne possède pas ces propriétés de gonflement, a des applications parapharmaceutiques dont les résultats restent à prouver, notamment dans le domaine du système digestif. Des tribus indigènes d'Amérique du Sud, d'Afrique et d'Australie ont longtemps employé l'argile de bentonite pour cet usage.
En raison de ses fonctionnalités rhéologiques, la bentonite a un comportement thixotrope. Des petites quantités de bentonite en solution aqueuse forment un mélange visqueux, dont la viscosité baisse lorsque l'effort mécanique qui lui est appliqué augmente.
Catalyseurs
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Eaux usées -- Epuration
Eaux usées -- Recyclage
Oxyde de zinc
Photocatalyse
Polluants organiques -- DétériorationIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Organic pollutants in leather post tanning wastewater were degraded by the advanced oxidation process using semiconductive photocatalysis technique. A mixed oxide nanocatalyst Bentonite-ZnO was employed for the degradation process and the same has been prepared by hydrothermal method. The morphological and optical characteristics of the nanocatalyst was well characterized by using X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Diffuse Reflectance Spectroscopy (DRS) and Fluorescence Spectrophotometer studies. The diffraction peak of the mixed oxide catalyst confirms the formation of wurzite structure of ZnO with the incorporation of bentonite clay particles. The SEM image displayed the formation of nanosized particles with porous spherical texture. The optical band gap of the bare ZnO (3.3 eV) and Bentonite-ZnO (2.5eV) catalysts were measured by DRS studies. A comparative study of photoluminescence spectra of ZnO and Bentonite-ZnO showed the suppression of charge carrier recombination in case of Bentonite-ZnO than bare ZnO. Existence of suitable charge carriers and vectorial transportation between bentonite and ZnO makes Bentonite-ZnO as an appropriate catalyst for degradation of organic pollutants present in leather post tanning liquor. The semiconductive photocatalysis on leather tannery post tanning wastewater was carried out in a specially designed pilot scale solar light reactor with Bentonite-ZnO, the results are compared with bare ZnO catalyst, where the degradation property with mixed oxide catalyst Bentonite-ZnO is better than bare ZnO. The decrease in COD with Bentonite-ZnO nanocatalyst is found to be 35.3% for three hours of continuous reaction under solar light. Such percentage of COD reduction suggest to offer this nanocatalyst treatment as preliminary step for better performance of further treatment process. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of bentonite-ZnO mixed oxide catalyst - Photocatalytic treatment of post-tanning wastewater
- RESULTS AND DISCUSSION : X-ray diffraction studies - UV-visible reflectance spectroscopy - Photoluminescence study - Effect of pH on the activity - Photocatalytic degradation under solar lightEn ligne : https://drive.google.com/file/d/1lUVJXMxJA9QXQ1m_E5gKqxJXPuJIBnDn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30840
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 8 (08/2018) . - p. 241-247[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20115 - Périodique Bibliothèque principale Documentaires Disponible A new, highly potent 1,8-naphthalimide-based fluorescence turn-off chemosensor capable of detecting Cu(II) ions in real-world water samples / Chuang Li in COLORATION TECHNOLOGY, Vol. 134, N° 3 (06/2018)
[article]
Titre : A new, highly potent 1,8-naphthalimide-based fluorescence turn-off chemosensor capable of detecting Cu(II) ions in real-world water samples Type de document : texte imprimé Auteurs : Chuang Li, Auteur ; Xintong Han, Auteur ; Shanshan Mao, Auteur ; Stephen Opeyemi Aderinto, Auteur ; Xinkui Shi, Auteur ; Kesheng Shen, Auteur ; Huilu Wu, Auteur Année de publication : 2018 Article en page(s) : p. 230-239 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse quantitative (chimie)
Eaux usées -- Recyclage
Ions cuivre
Produits chimiques -- Détection
Récupération (Déchets, etc.)Index. décimale : 667.3 Teinture et impression des tissus Résumé : The synthesis of a new 1,8-naphthalimide-based fluorescence turn-off chemosensor for the effective detection of Cu(II) ions is reported. The chemosensor MAST was characterised by mp, Fourier Transform-infrared (FTIR), ultraviolet-visible (UV-vis), fluorescence, 1H-NMR and 13C-NMR spectroscopy, and mass spectrometry. After treatment with Cu(II) ions in coexistence with various competitive metal ions in a dimethylsulphoxide (DMSO)/4-2-hydroxyethyl)-1-piperazineethanesulphonic acid (HEPES) buffer solution (v/v, 1:1; pH 7.4), the chemosensor demonstrated high selectivity towards Cu(II) ions and a fluorescence quenching of 83.67% was observed. In addition, a good linear response for the chemosensor detecting Cu(II) ions was obtained over the concentration range 0.2–1 µm. The combined results of UV-vis and fluorescence titrations with the Job plot yielded a 1:1 stoichiometric interaction of the chemosensor with Cu(II) ions. The association constant and detection limit were calculated as 1.37 x 10-6 m-1 and 1.69 x 10-8 m, respectively. Based on results, the quenching response of MAST towards Cu(II) ions could be ascribed to the reverse-photoinduced electron transfer (PET) mechanism. Finally, the proposed chemosensor was applied to quantify Cu(II) ions in real-world water samples and excellent recovery rates of 98–105.8% were obtained. Note de contenu : - EXPERIMENTAL : Reagents and materials - Instrumentation - Procedures for spectroscopic measurements - Procedures for spectroscopic measurements - Synthesis - Synthesis of intermediate compound 2, 3 and 4 - Synthesis of the proposed chemosensor, MAST
- RESULTS AND DISCUSSION : Synthesis and characterisation - Investigation of the photophysical properties of MAST - Investigation of the effect of pH on the sensing properties of MAST - UV-vis and fluorescence titration of MAST towards Cu(II) ions - Spectroscopic assessment of MAST in the presence of various metal ions - Selectivity study of MAST for Cu(II) ions over competitive metal ions - Determination of the soichiometric ratio and binding constant - Determination of the detection limit of MAST - Propsed sensing mechanism - response time - Real-worl application of MAST for Cu(II) quantificationDOI : 10.1111/cote.12340 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12340 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30647
in COLORATION TECHNOLOGY > Vol. 134, N° 3 (06/2018) . - p. 230-239[article]Réservation
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