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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 6 (11-12/2013) . - p. 231-237 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 adsorbent En ligne : https://drive.google.com/file/d/1qmrD9Zv-_GzouZpxAndkHY9xXn5JrH_S/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20144 [article]

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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)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 6 (06/2017) . - p. 198-206 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) Tanins Index. 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 kinetics En ligne : https://drive.google.com/file/d/1Lftyao8lb93ahjiuqGy0Rs24kz2_QTyL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28690 [article]

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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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 3 (05-06/2002) . - p. 96-100 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 Floculation Index. 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 results En ligne : https://drive.google.com/file/d/1_YusTO_2yqec69S27ZP60VA4rVk38bcV/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39922 [article]

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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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 4 (07-08/2001) . - p. 137-139 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 -- Déchets Index. 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 polyphenols En ligne : https://drive.google.com/file/d/1wX_JgFPpBR5LXe7ouWq9uvYSuevSrClg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40245 [article]

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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)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 89, N° 5 (09-10/2005) . - p. 204-209 Titre : Aswan clay as sorbent for removal of Cr(III) and Cr(VI) from synthetic solution and tannery wastewater Type de document : texte imprimé Auteurs : O. A. Mohamed, Auteur ; S. A. Sayed, Auteur ; H. S. Mohamady, Auteur ; N. H. El-Sayed, Auteur Année de publication : 2005 Article en page(s) : p. 204-209 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Adsorption Argile Caractérisation Chrome trivalent -- Absorption Déchets industriels -- Elimination Eaux usées -- Epuration Eaux usées -- Teneur en chrome trivalent Isotherme d'adsorption Tannage -- Déchets Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The sorption on Aswan clay of Cr(III) and Cr(VI) from synthetic solution and tannery wastewater has been studied. The clay has been characterized and used for the removal of chrome. The adsorption was studied as a function of pH, contact time, adsorbate concentration, loading, temperature and interfering ions. The equilibrium data fitted well with a Freundlich adsorption isotherm, where the Kf and n values are 2.08 - 4.6 for Cr(VI), 14.45 - 2.5 for Cr(III) and 8.31 - 2.4 for tannery wastewater. In our study we choose Aswan clay, which is low in cost, to aid the economy of the process. Adsorption studies indicated that chrome removal is 77% for CrVI, 90% for CrIII and 75% for a tannery wastewater. Note de contenu : - MATERIALS AND METHODS : Adsorbents - CHARACTERISTICS OF ASWAN CLAY : X-ray diffraction analysis - Adsorbates - Chemicals - Instrumentation - Methods - RESULTS AND DISCUSSION : Effect of pH - Effect of agitation time - Effect of adsorbent loading - Effect of adsorbate concentration - Effect of temperature - Effect of some anions on chromium (VI) removal - ADSORPTION ISOTHERMS En ligne : https://drive.google.com/file/d/1TtT-yFTYThWUEKw5oSLffFro0XdfeHyr/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39231 [article]

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Biochar : a possibility for solid waste disposal / W. Aitkenhead in LEATHER INTERNATIONAL, Vol. 215, N° 4827 (01-02/2013)  

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Biosorption of chromium from spent semi-chrome liquor : Part 1 - Effective pollution abatement using bacillus cerus / Saranya Kailasam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 11 (11/2021)  

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Biotechnological recovery of carbon fibers from fiber composites that are difficult to recycle / Evelyne Konopka in CHEMICAL FIBERS INTERNATIONAL, Vol. 72, N° 3 (09/2022)  

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Une bonne protection passe par une identification du risque / Grégory Brasseur in TRAVAIL & SECURITE, N° 711 (11/2010)

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Chemical treatment / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 40 (03-04/2020)  

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A cleaner Al2O3-ZrO2/MMT nanocomposite adsorbent based on Al-Zr tanning waste / E. Tao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 11 (11/2014)  

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Closed-loop processing : management in existing tanneries and new-builds designed for purpose / Richard Daniels in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 12 (12/2019)  

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Comparative study of four different flavonoid compounds-containing plant extracts functionalised waste wool for accelerating aqueous chromium(VI) reductive removal / Jiayu Gu in COLORATION TECHNOLOGY, Vol. 138, N° 1 (02/2022)  

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Cyclic dechroming process for chrome shavings by coordination substitution reaction and photocatalysis / Yuling Tang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 11 (11/2014)  

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Decolorisation of aqueous dye solutions by low-cost adsorbents : a review / Rashmi Sanghi in COLORATION TECHNOLOGY, Vol. 129, N° 2 (04/2013)  

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Detanning chromium leather waste / Abigail Clare in INTERNATIONAL LEATHER MAKER (ILM), N° 54 (07-08/2022)  

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Dye incorporated nanopolymers and their application to leather wastewater : a study of removal of Cr(III) ions in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 4 (07-08/2016)  

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Dye removal using hydrophobic polyvinylidene fluoride hollow fibre composite membrane by vacuum membrane distillation / Hongbin Li in COLORATION TECHNOLOGY, Vol. 135, N° 6 (12/2019)  

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Effect of co-combustion of tannery sludge and coal on the migration of Cr in the bottom ash / Jianfei Zhou in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 1 (01-02/2014)  

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Effect of leather chemicals on Cr(III) removal from post tanning wastewater / Yuling Tang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 3 (03/2018)  

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