| Titre : |
Study of the chrome hexavalent content in commercial chromium salts |
| Type de document : |
texte imprimé |
| Auteurs : |
Anna Bacardit, Auteur ; Maria Gonzà lez, Auteur ; Teresa Mir, Auteur ; Ricard March, Auteur ; Jordi Corbera, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 14-18 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Sels de chrome -- Teneur en chrome hexavalent
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Three forms of chromium are used in industry: Cr(0), Cr(III) and Cr(VI). While chromium metal and Cr(III) ions are not considered toxic, hexavalent chromium is both toxic and carcinogenic.
In the leather sector, chromium (III) is used as a tanning agent; however, under specific conditions, chromium (VI) can be formed in the leather post-production.
Due to this reason, the objective of this work is to determine the possible hexavalent chromium content in four commercial basic chromium salts and the tendency of these salts to originate hexavalent chromium when applied to leather.
The chromium salts studied do not originate Cr(VI) when applied to hide under optimum working conditions. However, it is demonstrated that the appearance of chromium (VI) may be due to bad practices during the tanning and/or post-tanning processes. |
| Note de contenu : |
- Fig. 1 : Reaction between the crhome complexes and ionized carboxyl groups in the side chains of the collagen
- Table 1 : Tanning formulation
- Table 2 : Post-tanning formulation
- Table 3 : Chemical dtermination of chromium (VI) content in chemicals
- Table 4 : Chemical determination of chromium (VI) content according to ISO 19071
- Table 5 : Chemical determination of chromium (VI) content in leather
- Table 6 : Post-tanning formulation
- Table 7 : Chemical determination of chromium (VI) content in leather using modified formulations |
| En ligne : |
https://drive.google.com/file/d/1XPRssh-TUmmPi0XKYw5ofQih5xTRG6gN/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33538 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 1 (01-02/2020) . - p. 14-18
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