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Adsorption, biosorption and bioaccumulation used to remove chromium (III) from tanning wastewaters : A critical review / B. H. Hintermeyer in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 6 (11-12/2013)
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Titre : Adsorption, biosorption and bioaccumulation used to remove chromium (III) from tanning wastewaters : A critical review Type de document : texte imprimé Auteurs : B. H. Hintermeyer, Auteur ; E. L. Tavani, Auteur Année de publication : 2013 Article en page(s) : p. 231-237 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Adsorption
Bioaccumulation
Biosorption
Champignons microscopiques
Chrome trivalent
Déchets industriels -- Elimination
Eaux usées -- Décontamination
Eaux usées -- Epuration
Eaux usées -- Recyclage
Microorganismes
Séparation (technologie)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Processes of adsorption, biosorption and bioaccumulation were analyzed considering their ability to remove chromium(III). Already published studies that represent the actual state of knowledge were taken into account for this purpose. The review includes a detailed description of principal physicochemical properties of adsorbents, biosorbents and micro-organisms, pointing out those features that explain the mechanism by which the separation occurs. We noted an inadequate evaluation of the bearing species of the tanning agent with respect to treated solutions and that, not always the most adequate species was selected. In order to elucidate both aspects, the way in which the electrical charge and the size of studied complex ions affect the attraction force in adsorption/biosorption were examined. The consideration of such parameters proved that the electrical charge varies enormously from one substance to another and besides it prevails on the size. Accordingly, it was decided to focus attention only on treatments that were performed with tanning wastewater or with basic chromium(III) sulphate. Finally, the amounts of chromium(III) sequestered per gram of each adsorbent/biomaterial were compared. The largest uptake was 189.1mg/g, obtained with a Cr-resistant autochthonous fungus. Note de contenu : - Organic adsorbents
- Electric charge and size of chromium (III) bearing species
- Amount of chromium (III) retained by each adsorbentEn ligne : https://drive.google.com/file/d/1qmrD9Zv-_GzouZpxAndkHY9xXn5JrH_S/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20144
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Code-barres Cote Support Localisation Section Disponibilité 15837 - Périodique Bibliothèque principale Documentaires Disponible Adsorption isotherm and kinetics of tannic acid on to carbonized chrome tanned leather solid waste / Rubina Chaudhary in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 6 (06/2017)
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Titre : Adsorption isotherm and kinetics of tannic acid on to carbonized chrome tanned leather solid waste Type de document : texte imprimé Auteurs : Rubina Chaudhary, Auteur ; Anupama Pati, Auteur Année de publication : 2017 Article en page(s) : p. 198-206 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorbants et adsorbants
Carbonisation
Cinétique chimique
Cuirs et peaux -- Déchets
Déchets industriels -- Elimination
Isotherme d'adsorption
Solutions aqueuses (chimie)
TaninsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The disposal of chrome tanned leather shavings (CTLS) waste is a serious concern for the environment due to the presence of chromium. In this study, an attempt has been made to prepare adsorbent from CTLS through carbonization process. Carbonization of CTLS at temperature 600°C had provided surface area of 620 m2 g-1 and total pore volume of 0.49 cm3 g-1. The adsorption study is conducted by employing adsorbent prepared from CTLS on adsorbate tannic acid. The effects of various experimental parameters have been investigated using a batch adsorption technique to obtain information on treating wastewater containing tannic acid. The extent of tannic acid removal was studied by varying parameters such as pH, contact time, initial concentration of the tannic acid and amount of adsorbent. The removal efficiency of tannic acid in aqueous solution is found to be about 95%. The experimental equilibrium data for this system has been analyzed using the linearized forms of Langmuir and Freundlich isotherms. The Langmuir isotherm was found to provide the best theoretical correlation of the experimental data for the adsorption of tannic acid. The adsorption of tannic acid on adsorbent increased from 57 to 63 mg g-1, when the temperature was increased from 30 to 60°C. The adsorption was found to follow pseudo-second order kinetics. In short, this study provides a greener solution for CTLS and tannin containing wastewater. Note de contenu : - EXPERIMENTAL : Materials - Preparation of carbonized (CTLS) - Preparation of aqueous solution of tannic acid as adsorbent - Adsorption studies - Isotherm studies - Adsorption kinetics
- RESULTS AND DISCUSSION : Characteristics of adsorbent - Effect of pH, initial concentration and treatment period on the removal of tannic acid - Adsorption isotherms - Adsorption kineticsEn ligne : https://drive.google.com/file/d/1Lftyao8lb93ahjiuqGy0Rs24kz2_QTyL/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28690
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Code-barres Cote Support Localisation Section Disponibilité 19012 - Périodique Bibliothèque principale Documentaires Disponible Alternative treatments for footwear industry liquid effluents - Part 1 - Classical approach in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 3 (05-06/2002)
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Titre : Alternative treatments for footwear industry liquid effluents - Part 1 - Classical approach Type de document : texte imprimé Année de publication : 2002 Article en page(s) : p. 96-100 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Caractérisation
Charbon actif
Chaussures -- Industrie -- Aspect de l'environnement
Coagulation
Cuirs et peaux
Déchets industriels -- Elimination
Eaux usées -- Epuration
Eaux usées -- Recyclage
FloculationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The footwear industry generates small volumes of non-biodegradable liquid effluents from finishing operations which have a high organic load, mainly due to pigments, organic acids and organic solvents. In consequence, these effluents must be treated to accomplish regulatory requirements before discharge. One of the treatment alternatives is coagulation/flocculation, a well-known treatment for removing fine particles and colloids. Tests carried out using lime, aluminum sulphate, ferric chloride and ferric sulphate as coagulants gave chemical oxygen demand (COD) and 5-day biochemica1 oxygen demand (BOD5) removals over 80-90 %. However, despite this efficiency, some of the effluent characteristics are still higher than those imposed for discharge to surface waters, land or sewage systems. A polishing step using activated carbon adsorption is then required to permit the discharge to sewage systems, but the quantities of adsorbent required casts some doubt on the feasibility of the process. Note de contenu : - Characterisation of the effluents
- Coagulation/flocculation
- Activated carbon adsorption
- Table 1 : Characteristics of the effluents according to their residence time at the finishing system-
- Table 2 : Characteristics of the one-week-old sample B of effluent
- Table 3 : Jar tests with effluent sample B
- Table 4 : Selected conditions for coagulation/flocculation of A, B and C effluent samples
- Table 5 : Results of coagulation/flocculation on effluent A
- Table 6 : Results of coagulation/flocculation on effluent B
- Table 7 : Results of coagulation/flocculation on effluent C
- Table 8 : FeCl3 dose optimisation
- Table 9 : Results of coagulation/flocculation on effluent D
- Table 10 : Activated carbon treatment resultsEn ligne : https://drive.google.com/file/d/1_YusTO_2yqec69S27ZP60VA4rVk38bcV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39922
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 3 (05-06/2002) . - p. 96-100[article]An experimental study of the removal of sulphide in the aeration of fellmongery effluent / D. E. Rawlings in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59, N° 5 (09-10/1975)
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Titre : An experimental study of the removal of sulphide in the aeration of fellmongery effluent Type de document : texte imprimé Auteurs : D. E. Rawlings, Auteur ; D. R. Woods, Auteur ; Desmond R. Cooper, Auteur Année de publication : 1975 Article en page(s) : p. 143-148 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Catalyseurs métalliques
Déchets industriels -- Elimination
Eaux usées
Eaux usées -- Analyse
Eaux usées -- Décontamination
Manganèse
SulfuresIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Although it is accepted that micro-organisme are responsible for a large share of the effectiveness of biological treatment of waste waters, studies of the bacteria involved in the normal functioning of the process are relatively few in number. Furthermore, where these studies have been conducted, the bacteria in domestic sewage treatment have been the main subject of investi¬gation and industrial effluents largely neglected. Fell¬mongery and tannery effluents have characteristics which differ vastly from domestic sewage and it is therefore to be expected that conditions for effective biological treatment of these industrial effluents may also differ.
Fellmongery and tannery waste waters are complex mixtures of sulphide, bisulphide, calcium ions, dissolved albumin, mucoids, mucopolysaccharides, keratin, dis-solved and emulsified fats, soluble and insoluble organic and inorganic compounde. This results in an effluent with an oxygen demand (estimated as oxygen absorbed, OA, by the 4 h permanganate test) approximately 50-fold greater than domestic sewage. The high pH (11-13) and sulphide concentration (700-2000 mg/1) in particular have a detrimental effect on the efficient functioning of a biological treatment process.
Effluent activated sludge aeration pilot plants have been constructed at both a fellmongery and a tannery to determine the conditions under which effective effluent purification takes place. Preliminary investigations showed that if the high pH of the effluent is not reduced before aeration treatment, the sulphide is not effectively removed by aeration and the decrease in oxygen demand of the effluent is small. In contrast, if the pH of the effluent is reduced to pH + 9 with commercial sulphuric acid before aeration, the sulphide is readily removed by a short pre-aeration period and the oxygen demand of the effluent is greatly reduced by the subsequent activated sludge treatment process. However, the projected large volumes of sulphuric acid needed to neutralise the very large volumes of high pH effluent from an entire factory would make this neutralisation costly. A tannery or fellmongery can produce 180 kl (40,000 gal) or more of lime-sulphide effluent per day.
The addition of managanese in the form of the sulphate or chloride to lime-sulphide effluents has been used for several years as an alternative to the addition of sulphuric acid in a system of minimal mechanical aeration. Man-ganese acts as an oxidising catalyst in the removal of sulphide from these liquors. Berg, Miller, Pearce, Shuttle-worth and Williams-Wynn indicated that a level of 100 mg/1 manganese should be effective in removing the sulphide after 5-16 h aeration. Manganese has the added advantage in that it is less expensive than sulphuric acid.
Laboratory studies were undertaken to determine the role played by micro-organisms in the reduction of oxygen demand in lime-sulphide effluent excluding the reduction in oxygen demand due to the chemical effects of aeration, such as the removal of sulphide. The least amount of neutralisation necessary for the effluent treatment process to continue effectively and the effect of the addition of manganese catalyst on the effluent treatment process, in particular on the micro-organisms of the activated sludge were also investigated.
Note de contenu : - MATERIALS AND METHODS : Source of effluent - General experimental procedure - Laboratory aeration system - Preparation of activated sludge seed - Sterilisation of effluent - Effluent analysis techniques
- RESULTS AND DISCUSSION : The effect of effluent neutralisation before aeration on the effluent treatment process - The effect of manganese oxidising catalyst on the effluent treatment process
- Table 1 & 2 : The effect of manganese oxidising catalyst of the effluent treatment processPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34111
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Code-barres Cote Support Localisation Section Disponibilité 007103 - Périodique Bibliothèque principale Documentaires Disponible Assessment of properties and effect of heterogeneous cultures of aerobic micro-organisms in the bio technology of tannery wastewater / J. Kupec in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 4 (07-08/2001)
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Titre : Assessment of properties and effect of heterogeneous cultures of aerobic micro-organisms in the bio technology of tannery wastewater Type de document : texte imprimé Auteurs : J. Kupec, Auteur Année de publication : 2001 Article en page(s) : p. 137-139 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Biodégradation
Biopolymères
Biotechnologie
Boues résiduaires -- Analyse
Cuirs et peaux -- Déchets
Déchets industriels -- Elimination
Microorganismes
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The article presents a review of results we obtained during recent years in the field of assessing the properties and effect of activated sludge produced during treatment of tannery wastewaters by activation. The first part primarily mentions works concerning this biornass itself (composition. activity, sorption properties and others). The second then summarises results obtained when evaluating processes under way during the removal of specific substrates produced by tanning manufacture (e.g. proteins, tanning agents). The results can serve to choose alternatives capable of use in disposing of the significant pollution that tanning emits into the environment. Note de contenu : - Survey results : Elementary analysis - Biopolymers - Adsorbance - Buffer ability - Treatment of tanning materials - Enzyme activity - Respiration activity
- Biodegradation of proteins and polyphenolsEn ligne : https://drive.google.com/file/d/1wX_JgFPpBR5LXe7ouWq9uvYSuevSrClg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40245
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 4 (07-08/2001) . - p. 137-139[article]Aswan clay as sorbent for removal of Cr(III) and Cr(VI) from synthetic solution and tannery wastewater / O. A. Mohamed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 5 (09-10/2005)
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