Wastewaters from several industries, including electroplating and leather tanning, are enriched with chromium (Cr). This heavy metal exist as Cr(VI) and Cr (III) in aqueous systems, and Cr(VI) is about 200x more toxic than Cr(III). Adsorption is one of the methods for the removal of chromium from wastewaters. However, except granular activated carbon (GAC), the existing commercial adsorbents are ineffective for Cr(VI) removal, though highly effective for Cr(III).
Low-cost alternative adsorbent for treatment of Cr(VI) - rich wastewaters.