Use of Calcined Tannery Sludge Containing Chromium Compounds in Soda-Lime Glass Fabrication

Abstract:

Tanning industries generates large quantities of solid wastes containing chromium compounds with characteristics of high-polluting and hazardous conditions. However, these wastes are a potential source of chromium which could be used by the glass and ceramic enamels industries. In this study the properties of a calcined tannery sludge containing chromium compounds was investigated in order to evaluate the potential of using this powder as a suitable and cheap green colorant for the glass manufacturing. X-ray diffraction (XRD), chemical (XRF) and thermal (DTA/TG) analyses were used to determine the physical and chemical characteristics of tannery sludge. Colorimetric method using diphenylcarbazide were conducted to determinate the Cr (VI) concentration in the samples. Soda-lime glass containing calcined tannery sludge was prepared by melting at 1550°C. The results showed that the calcined tannery sludge has a favorable behavior to be used as an alternative source of chromium for the glass manufacturing.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 1541-1546
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.1541
• Online since: August 2012
• Authors: M.M. Chambi, Samuel Marcio Toffoli
• Keywords: Chromium, Glass, Solid Waste, Tannery Sludge

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DOI: 10.1002/9781444319354