Adsorption of Cr(VI) by Nanosized Rutile under the Action of UV Radiation

the properties of nanosized sorbents prepared by high-energy milling from microcrystalline powder of titanium dioxide of rutile modification have been studied. It was established that milling to an average crystallite size of similar to 30 nm and ultraviolet illumination significantly improved the sorption properties of rutile with respect to chromium compared with those of the starting material and the ability of Cr(VI) to be reduced to Cr(III) in its presence. The maximum removal of Cr(VI) from aqueous solutions with a concentration of 50 mg/L was achieved under UV illumination in an acetate buffer medium at pH 4-5 and a content of ground rutile of 16.7 g/L. A mechanism of adsorption was proposed.

Automated summary

The properties of nanosized sorbents prepared by high-energy milling from microcrystalline powder of rutile modification were studied. The results showed that milling to an average crystallite size of 30 nm and ultraviolet illumination significantly improved the sorption properties of rutile for chromium and its ability to be reduced. The maximum removal of Cr(VI) from aqueous solutions was achieved under UV illumination in an acetate buffer medium at pH 4-5 and a content of ground rutile of 16.7 g/L. A mechanism for adsorption was proposed.