Berry, F.J.; Costantini, N. and Smart, L.E.
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Chromium was extracted from leather shavings by treatment with a protease enzyme using either CaO, NaOH, MgO or NH4(OH) as alkaline agents during the treatment. The pigments known as chrome-tin pink and cobalt-chromite green and of composition CaSnSiO5.xCr2O3 and Cr2CoO4 respectively, were synthesized using chromium obtained from the enzyme digested leather shavings. The phase evolution and characterization of the materials has been performed by powder X-ray diffraction, FT-IR, and UV measurements. Colour measurements showed the chrome-tin pink to be identical to that made from pure Cr2O3. The cobalt-chromite green showed a gradation of colour as a function of firing temperature and on the type and amount of alkaline agent used during the extraction of chromium.
|Item Type:||Journal Article|
|Extra Information:||URL takes the user to the main page--Not directly to article.|
|Academic Unit/Department:||Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
|Depositing User:||Lesley Smart|
|Date Deposited:||17 Jul 2006|
|Last Modified:||04 Oct 2016 09:47|
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