Chromium Isotopes and the Fate of Hexavalent Chromium in the Environment
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- 15 March 2002
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 295 (5562) , 2060-2062
- https://doi.org/10.1126/science.1068368
Abstract
Measurements of chromium (Cr) stable-isotope fractionation in laboratory experiments and natural waters show that lighter isotopes reacted preferentially during Cr(VI) reduction by magnetite and sediments. The 53 Cr/ 52 Cr ratio of the product was 3.4 ± 0.1 per mil less than that of the reactant. 53 Cr/ 52 Cr shifts in water samples indicate the extent of reduction, a critical process that renders toxic Cr(VI) in the environment immobile and less toxic.Keywords
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