The hexavalent chromate compounds are of great industrial
importance and are produced, among other sources, by smelting
and roasting during the extraction process of chromium. A controllable
source of chromium is wastewater from the chrome-plating
and metal finishing industries, textile plants, and tanneries [1]. The
major effect from ingestion of high levels of Cr(VI) is acute tubular
and glomerular damage. Evidence of kidney damage fromlower
level chronic exposure is equivocal [2]. However, Cr(VI) is corrosive
and causes chronic ulceration and perforation of the nasal septum,
as well as chronic ulceration of other skin surfaces. Occupational
exposure of Cr(VI) may be a cause of asthma [3] and exposure
to chromium, particularly in chrome production and the chrome
pigment industries, is associated with cancer of the respiratory
tract [4]. The mechanism of Cr(VI) carcinogenicity in the lung is
believed to be its reduction to Cr(III) and generation of reactive
intermediates. The maximum acceptable limit for total chromium
in drinkingwater recommended by theWorld Health Organization
is 0.05mgL−1 [5].