Indian Journal of Science and Technology

Abstract

Objectives: Heavy metal contaminated land is increasingly becoming an important environmental, health, economic, and planning issue in the World. The unplanned disposal of heavy metal containing wastes, has resulted in a multi fold increase in environmental issues. Around 2.2 Lakhs tons of Chromium Ore Processing Residue(COPR) is left untreated at Ranipet SIPCOT Industrial complex. Solidification technique is proposed for the safe disposal of COPR in this study. Methods/ Analysis: Solidification process curtails migration of contaminants from the Cr(VI) bearing waste and reduces the toxicity of Cr(VI). In the present study ceramic composite are used as binding material. Mixture of COPR and ceramic composite in different ratios are verified at 1000 & 1200 0 C. The resultant composite has more strength and are bound like solid matrix, thereby avoid leaching of metal ions trapped in the middle. Findings: It is observed that more than 98% fixation is possible at specific composition. Leaching ability at 1200 0 C is very low than it observed for 10000 C. Compressibility strength also depends upon the temperature. Composition of the composite influences compressibility test. Novelty /Improvement: The vitrified composite of COPR and ceramic at 1200o C has acceptable non leachable character with porcelain tiles of appearance. It may be used in construction activity.

Keywords: Ceramic Solidification, Chromium(VI), Chromium Ore Processing Residue, Leaching ability