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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Chromium(III) adsorption on smectite from a tanning wastewater / C. Volzone in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 5 (09-10/1995)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 79, N° 5 (09-10/1995) . - p. 148-152 Titre : Chromium(III) adsorption on smectite from a tanning wastewater Type de document : texte imprimé Auteurs : C. Volzone, Auteur ; E. L. Tavani, Auteur Année de publication : 1995 Article en page(s) : p. 148-152 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Adsorption of chromium(III) on a smectite from a tanning wastewater was studied. Similarly adsorptions of sodium, chloride and sulphate were analyzed. Tests were carried out with solutions with a chromium(III) content ranging between 0.62-31.20 mmole/1. The method used to develop this work covered the characterization of the solution and of the smectite before and after each test. Solutions were characterized by chemical analyses and by visible spectrophotometry. The original smectite and smectites after each adsorption test were characterized by chemical analyses, by X-ray diffraction, by scanning electron microscopy and by surface chemical analysis via an electron microprobe. The results allowed us to determine the principal physicochemical characteristics of the chromium(III) adsorption on smectite. Monomeric chromium(III° was detected in the tanning wastewater and in each of the solutions prepared from the original solution. Adsorptions of sodium, chloride and sulphate were negligible for tests performed with low concentration solutions. Such behaviour changed with the increase of the prepared solution concentrations. The maximum adsorptions determined were : 0.81 mmole of chromium(III)/g of smectite ; 0.30 mmole of sodium/g of smectite ; 0.30 mmole of chloride/g of smectite and 0.15 mmole of sulphate/g of smectite. Finally, the Langmuir equation was used in order to quantify the chromium(III) adsorption. En ligne : https://drive.google.com/file/d/1kCV_IxdXxJwuBYFxwyBOJGJcPMK30UwJ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8201 [article]

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Tannage with iron (III) chloride manufactured from titaniferous iron ores / E. L. Tavani in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 76, N° 4 (07-08/1992)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 76, N° 4 (07-08/1992) . - p. 128-131 Titre : Tannage with iron (III) chloride manufactured from titaniferous iron ores Type de document : texte imprimé Auteurs : E. L. Tavani, Auteur ; N. A. Lacour, Auteur Année de publication : 1992 Article en page(s) : p. 128-131 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Various aspects related to the manufacture, purity and tanning use of iron (III) chloride prepared from titaniferous iron ores were examined. The physical upgrading of the mineral was studied and the resulting concentrated fraction was digested with hydrochloric acid. Those cations which are dissolved together with the iron (III) thus, possibly altering the tanning quality of the prepared solution, were determined. Undesirable cations were eliminated by means of simple operations. The tanning properties of the prepared solution were evaluated by tanning tests. Characterization of the tanned leather was carried out by means of physicomechanical and chemical tests. In the process proposed, the (III) chloride was obtained as a minimum cost by-product of an extractive metallurgy process. En ligne : https://drive.google.com/file/d/1At9cXKhVVbXJ7h9dyMN48fOX7eWFSkHv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8607 [article]

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