Comparative Cytotoxic Effects of Hexavalent and Trivalent Chromium Compounds on Cultured Cells

Removal of Trivalent and Hexavalent Chromium by Seaweed Biosorbent

Protonated or Ca-form Sargassum seaweed biomass bound up to 40 mg/g of Cr(III) by ion exchange at pH 4. An ion-exchange model assuming that the only species taken up by the biomass was Cr(OH)2+ successfully fitted the experimental biosorption data for Cr(III). The maximum uptake of Cr(VI) by protonated Sargassum biomass at pH 2 was explained by simultaneous anion exchange and Cr(VI) to Cr(III) ...

Comparative toxicity of trivalent and hexavalent chromium V: Enzymatic alterations in rat liver and kidneys.

The effect of trivalent and hexavalent chromium compounds on the activities of selective hepatic drug metabolising enzymes and renal enzymes, in relation to the duration of exposure and tissue concentration of the metal in rats, was investigated to evaluate their potential toxicity. The activity of hepatic aniline hydroxylase decreased more markedly than that of amino N-demethylase on treatment...

comparative studies on the bioremediation of hexavalent and trivalent chromium using citrobacter freundii: part i-effect of parameters controlling biosorption

the potential of citrobacter freundii, a gram negative bacteria for the remediation of hexavalentchromium (cr(vi)) and trivalent chromium (cr(iii)) from aqueous solutions was investigated. bioremediationof cr(vi) involved both biosorption and bioreduction processes, as compared to only biosorption processobserved with respect to cr(iii) bioremediation. in the case of cr(vi) bioremediation studi...

Pollution Prevention Technology Profile Trivalent Chromium Replacements for Hexavalent Chromium Plating

Particulate and soluble hexavalent chromium are cytotoxic and genotoxic to Steller sea lion lung cells.

Hexavalent chromium is an environmental contaminant. Within the environment, marine waters are a common site for hexavalent chromium deposition. We have recently reported significantly high levels of chromium in skin tissue from North Atlantic right whales. These findings demonstrate that marine species are being exposed to chromium. It is possible that such exposures may be playing a role in p...