Chromium leachatiblity from leather waste and eco-toxicity under environmental conditions / Peng Liang-Qiong in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 3 (03/2020)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 3 (03/2020) . - p. 87-95 Titre : Chromium leachatiblity from leather waste and eco-toxicity under environmental conditions Type de document : texte imprimé Auteurs : Peng Liang-Qiong, Auteur ; Long Wen-Jun, Auteur ; Li Yue, Auteur ; Wen-Hua Zhang, Auteur ; Bi Shi, Auteur Année de publication : 2020 Article en page(s) : p. 87-95 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Chimie analytique Chrome Cuir -- Déchets Ecotoxicologie Environnement -- Etudes d'impact Evaluation Lixiviation Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Chromium (III) is currently used in leather manufacture worldwide and the attention has been centered on the alleged environmental impact of chromium in leather waste. The effects of liquid-solid ratio, pH, contact time, rotational speed and temperature on the leachability of chromium from leather waste and the eco-toxicity were evaluated to investigate the ecological impact under environmental conditions. The characterization of leachate included the determination of total Cr and total organics (TOC), analysis of UV-visible absorption spectra, as well as the toxicity test with Photobacterium phosphoreum. The liquid-solid ratio, extractant pH, contact time and temperature significantly affected the leachability of chromium and toxicity of the leachate, whereas rotational speed slightly affected the leaching behavior when beyond 100 RPM. The toxicity of the leachate was related to both the amount of released substance which was mainly affected by contact time and liquid-solid ratio, and the species which was mainly affected by temperature and extractant pH. Finally, three samples from different tannery corresponding to leather waste were leached and characterized by total Cr, TOC and toxicity test under the environmental conditions of liquid-solid ratio 20:1(mL/g), pH 7.0, contact time 8 hours, rotational speed 100 RPM and temperature 25°C. These results contributed to the risk assessment of stacking field and waste management of chrome-containing leather. Note de contenu : - MATERIALS AND METHODS : Materials - Leaching experiments - Chromium analysis - Total organics analysis - UV-visible absorption spectra - Toxicological assays - RESULTS AND DISCUSSION : Release behavior of chromium and organics from leather waste - Effect of liquid/solid ratio - Effect of pH - Effect of contact time - Effect of rotational speed - Effect of temperature - TECHNOLOGICAL ASSAYS : Effect of liquid/solid ration - Effect of pH - Effect of contact time - Effect of rotational speed - Effect of temperature - Assessment of chrome-tanned leather wastes DOI : https://doi.org/10.34314/jalca.v115i03.1626 En ligne : https://drive.google.com/file/d/16PobO8GJAa-9BnwXcmCU7RA3a3jZ-kix/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33886 [article]

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