Correlation between bulk- and surface chemistry of Cr-tanned leather and the release of Cr(III) and Cr(VI)
2014 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 280, 654-661 p.Article in journal (Refereed) Published
About 1-3% of the adult general population in Europe is allergic to chromium (Cr). The assessment of the potential release of Cr(III) and Cr(VI) from leather is hence important from a human health and environmental risk perspective. The Cr(VI) content in leather was recently restricted in the European Union. The aim of this study was to assess possible correlations between the bulk and surface chemistry of leather, released Cr(III) and Cr(VI), and capacities of co-released leather specific species to reduce and complex released Cr. Four differently tanned leathers were characterized by scanning electron microscopy with energy dispersive spectroscopy, X-ray photoelectron spectroscopy, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, and the diphenylcarbazide colorimetric method. Their characteristics were compared with results on Cr(III) and Cr(VI) release into artificial sweat (ASW, pH < 6.5) and phosphate buffer (PB, pH 7.5-8.0), measured by means of spectrophotometry and atomic absorption spectroscopy. Co-released leather-specific species were shown to reduce Cr(VI), both in ASW and in PB. Their reduction capacities correlated with findings of the surface content of Cr and of released Cr. Leather samples without this capacity, and with less aromatic surface groups visible by ATR-FTIR, revealed Cr(VI) both at the surface and in solution (PB).
Place, publisher, year, edition, pages
2014. Vol. 280, 654-661 p.
Chromium(VI), Chromium(III), Leather, Vegetable tanning, Speciation
Ecology Environmental Sciences
IdentifiersURN: urn:nbn:se:kth:diva-157224DOI: 10.1016/j.jhazmat.2014.08.061ISI: 000344428700076PubMedID: 25222930ScopusID: 2-s2.0-84908004696OAI: oai:DiVA.org:kth-157224DiVA: diva2:769800
FunderForte, Swedish Research Council for Health, Working Life and Welfare, 2013-0054
QC 201412092014-12-092014-12-082014-12-09Bibliographically approved