| Titre : |
An approach for the treatment of vegetable tan liquor containing hydrolysable tannins |
| Type de document : |
texte imprimé |
| Auteurs : |
A. Sharli, Auteur ; Balachandran Unni Nair, Auteur ; Jonnalagadda Raghava Rao, Auteur ; Balaraman Madhan, Auteur |
| Année de publication : |
2003 |
| Article en page(s) : |
p. 381-387 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
In recent times leather industry is looking at options for a tanning system especially based on the natural products such as vegetable tanning materials. Nevertheless there is also a clear shortcoming in the usage of vegetable tanning materials because of the high organic load in the effluent generated, which is difficult to degrade and hence leads to high biological or chemical oxygen demand. Hence, in this study, methods to treat the effluent liquor containing myrobalan, a widely used hydrolysable tannin have been explored to reduce the pollution load generated by the same. Two methods have been adopted for the treatment of the myrobalan liquor. The first method involves breaking down of vegetable tannins to simpler compounds by oxidative degradation using hydrogen peroxide. The second method involves the precipitation of vegetable tannins using zinc sulfate as the precipitant. A 28% reduction in the COD has been obtained for the effluent liquor treated with H2O2 in the presence of Zerolite-Iron catalyst at 50°C. Myrobalan liquor precipitated with zinc sulfate at a pH of 10 has resulted in the reduction of COD by 74%. Additional reduction in the COD has been obtained by adapting the precipitation followed by oxidative degradation method in the presence of Zerolite-Iron catalyst, which has resulted in the reduction of COD load by 96%. |
| En ligne : |
https://drive.google.com/file/d/1Mo8tKhLCzhOEqy3KmF-imU8IneHay7x8/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4152 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVIII, N° 10 (10/2003) . - p. 381-387
Aller sur edunet
Accueil
An approach for the treatment of vegetable tan liquor containing hydrolysable tannins in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 10 (10/2003)
