India is one of the largest producers of chromium ore and salts, which are used worldwide as tanning agents. Following ore processing, extensive chromium slag is generated requiring disposal. Chromium ore slag can include commonly existing species of chromium including trivalent chromium (Cr(III)), hexavalent chromium (Cr(VI)), and elemental chromium (Cr). Although the adverse health effects of trivalent chromium are still widely debated, it is readily oxidized to the water-soluble and carcinogenic hexavalent chromium, which can contaminate surface and groundwater (US EPA 1998).