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Correlation between bulk- and surface chemistry of Cr-tanned leather and the release of Cr(III) and Cr(VI)
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science. Karolinska Institutet, Sweden.ORCID iD: 0000-0003-2145-3650
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.ORCID iD: 0000-0003-2206-0082
2014 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 280, p. 654-661Article in journal (Refereed) Published
Abstract [en]

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, p. 654-661
Keywords [en]
Chromium(VI), Chromium(III), Leather, Vegetable tanning, Speciation
National Category
Ecology Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-157224DOI: 10.1016/j.jhazmat.2014.08.061ISI: 000344428700076PubMedID: 25222930Scopus ID: 2-s2.0-84908004696OAI: oai:DiVA.org:kth-157224DiVA, id: diva2:769800
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2013-0054
Note

QC 20141209

Available from: 2014-12-09 Created: 2014-12-08 Last updated: 2022-06-23Bibliographically approved

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Hedberg, Yolanda S.Odnevall Wallinder, Inger

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