Abstract:Valence speciation and use of toxicology and exposure data that is specific to hexavalent chromium [Cr(VI)] are critical for accurate risk assessment of Cr(VI) exposures in all scenarios. Because trivalent chromium [Cr(III)] is naturally occurring and predominates in most environmental media, measures of total chromium alone cannot be used to characterize risk. Also, the toxicity and environmental fate of the two valences differ importantly. While Cr(III) is of very low toxicity and bioavailability, Cr(VI) is … Show more
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