| Titre : |
Two stage leather dyeing - A novel approach to minimize the dye discharge in the effluent |
| Type de document : |
texte imprimé |
| Auteurs : |
N. Vedaraman, Auteur ; Chellappa Muralidharan, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 184-189 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Colorants acides
Cuirs et peaux -- Teinture
Procédés de fabrication
Teinture
|
| Tags : |
Cuir Teinture 'Méthode teinture' 'Processus 'Réutilisation 'Colorant acide' |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Large quantities of synthetic dyes are used in tanneries for coloring leathers. A significant portion of the dyes offered do not fix to the leather and the un-utilized dye is discharged in the effluent, which may be environmentally harmful as it may require a long time for degradation. Depending upon the wastewater treatment methods adopted, sometimes these dyes may generate several highly toxic compounds. These dyes, when discharged into water bodies or land, may also cause severe environmental and health problems. Up to 10% (weight/weight of leather) dye is used in the dyeing process of conventional leather making. There are several physiochemical methods reported for treatment of dyes in effluent, which mainly degrade and remove the dye in effluent and do not aim for recovery and reuse of dye. In the present study an attempt has been made to modify the dyeing process in such a way that minimum dye is discharged in the effluent. Most of the un-utilized dye is recovered and recycled or re-utilized in subsequent dyeing. The visual and instrumental examination of the dyed leathers with this modified dyeing method led to encouraging results. This approach has not only reduced the dye discharge after dyeing but also facilitated substantial reduction in dye input by reuse thereby providing economic benefit to the tanners. The study was carried out for a specific synthetic acid dye and should be also be easily extended to other class of dyes. |
| Note de contenu : |
- Leather dyeing
- Conventional dyeing
- Two stage equilibrium dyeing
- Two stage with 20 % excess dyeing to match shade
EXPERIMENTAL : Materials and methods - Neutralization - dyeing - Fatliquoring and fixing |
| En ligne : |
https://drive.google.com/file/d/1Z1Z3S_UVj4_A6saTpib-w7ceCDoFUx5E/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11717 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVI, N° 6 (06/2011) . - p. 184-189
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Two stage leather dyeing - A novel approach to minimize the dye discharge in the effluent in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 6 (06/2011)
