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)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIX, N° 1 (01/2014) . - p. 14-24 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 Martí, Auteur ; Joan F. Martí, Auteur ; Núria Rodríguez, 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 pH Index. 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 Río 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 literature En ligne : https://drive.google.com/file/d/1O9XZmB4lRuhBnsLjCVSdvhUVyMd7aZ5n/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20139 [article]

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