title: A Method for the Removal of Chromium from Tanned Leather Wastes.
abstract: The separation of Cr(III) from collagen in chromium-tanned leather (wet-blue) is achieved by a combination of the protein (collagen) stabilization (protective cross-linking) and a subsequent labilization of the Cr(III) species bound to the protein. During the separation collagen retains the tertiary triple helical and higher (fibril) structures. The model proposed for the protective cross-linking involves inter- rather than intramolecular bridging, that is, a supramolecular bridging. The process of chromium removal takes place in a restricted aqueous environment, and it can be characterized as semihomogeneous or semiheterogeneous.
authors.affiliation: a Institute of Physical Chemistry, N.C.S.R. "Demokritos," , Attiki , Greece.|b Chemistry Department , Stanford University , Stanford , California , USA.
authors.forename: Vassiliki G
authors.initials: VG
authors.lastname: Poulopoulou
authors.affiliation: c Laboratory of Inorganic Chemistry , University of Athens , Athens , Greece.
authors.forename: Dimitris
authors.initials: D
authors.lastname: Katakis
authors.affiliation: a Institute of Physical Chemistry, N.C.S.R. "Demokritos," , Attiki , Greece.
authors.forename: Ersi
authors.initials: E
authors.lastname: Vrachnou