Synthesis of chromium-containing pigments from chromium recovered from leather waste

Waste Manag. 2002;22(7):761-72. doi: 10.1016/s0956-053x(01)00046-0.

Abstract

Cobalt-chromite green and chrome-tin pink pigments have been prepared from chromium extracted from leather shavings produced as a waste product of the leather-tanning industry. The alkaline agent (NaOH, CaO, MgO, NH4OH) used in the extraction process influences the nature of the final product. The effect of the NH4OH:CaO ratio on the final product in the case of cobalt-chromite green was examined. The pigments obtained were characterized by FT-IR and X-ray diffraction (XRD). Colour measurements were compared with those recorded from materials prepared from pure Cr2O3. The leaching of Cr(VI) from the materials was examined by UV spectroscopy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chromium / chemistry
  • Chromium / isolation & purification*
  • Chromium Compounds / chemistry
  • Chromium Compounds / isolation & purification*
  • Coloring Agents / chemistry
  • Coloring Agents / isolation & purification*
  • Conservation of Natural Resources*
  • Industrial Waste*
  • Spectroscopy, Fourier Transform Infrared
  • X-Ray Diffraction

Substances

  • Chromium Compounds
  • Coloring Agents
  • Industrial Waste
  • Chromium