alexa Photochemical reduction of hexavalent chromium in glycerol-containing solutions.
Toxicology

Toxicology

Journal of Environmental & Analytical Toxicology

Author(s): Yurkow EJ, Hong J, Min S, Wang S

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Abstract Hexavalent chromium [Cr(VI)] in the form of potassium dichromate was photochemically reduced to trivalent chromium [Cr(III)] in aqueous solutions containing glycerol. This reaction occurred rapidly during irradiation with either unfiltered sunlight or a UVA-emitting light source. Photochemical reduction of Cr(VI) was pH-dependent and did not occur in dilute solutions of sodium hydroxide. In acidified solutions, the reduction occurred at elevated rates and at lower concentrations of glycerol. This reaction was found to be dependent on the unsubstituted alcohol groups of glycerol since alpha-phosphoglycerol and beta-phosphoglycerol did not support the photochemical reduction of Cr(VI). These findings suggest that glycerol or related polyols can be used for the remediation of hexavalent (toxic) chromium at contaminated environmental sites.
This article was published in Environ Pollut and referenced in Journal of Environmental & Analytical Toxicology

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