| Titre : |
Novel approach towards high exhaust chromium tanning - Part I : role of enzymes in the tanning process |
| Type de document : |
texte imprimé |
| Auteurs : |
R. Venba, Auteur ; Chandra Babu Narasimhan Kannan, Auteur ; Swarna Vinodh Kanth, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 401-411 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Stringent environmental regulations on the discharge of pollutants from various industries have prompted researchers to seek the development of eco-benign technologies and process innovations aimed at low-waste and high exhaust chrome tanning systems. However, an effective biotechnological solution for reducing chromium pollution that is cost effective, commercially adaptable high exhaustion chrome tanning process has not been explored. In the present investigation, an attempt has been made to bring about enzyme assisted chrome tanning process using acid protease. The effect of varying conditions of enzyme treatment on the exhaustion of the chrome tanning agent have been studied and the conditions optimized. Three different control chrome tanning systems have been chosen with and without float in the tanning process. In order to have a comparative study, chrome tanning at an offer of 6% and 8% basic chromium sulphate (BCS) in experimental processes has also been performed. It has been observed that the penetration and distribution of chromium is much better for enzyme assisted chrome tanning process at pH 4.5 compared to other systems. There is no surface deposition of chromium in the experimental leathers, although chrome tanning has been carried out at higher pH of 4.5. This has been substantiated through scanning electron microscopic analysis. Chromium exhaustion greater than 95% has been achieved in optimized enzyme assisted chrome tanning systems. The amount of chromium present in these leathers has been relatively higher compared to conventional chrome tanned leathers. The performance characteristics assessed by physical and tactile evaluation of the enzyme assisted leathers has been on par with conventional leathers. |
| En ligne : |
https://drive.google.com/file/d/16ylAk4UqoEkocabwiRiWInyAsONnQAnM/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3253 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIII, N° 12 (12/2008) . - p. 401-411
Aller sur edunet
Accueil
Novel approach towards high exhaust chromium tanning - Part I : role of enzymes in the tanning process in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 12 (12/2008)
