Chromium isotopes and the fate of hexavalent chromium in the environment

被引：398

作者：

Ellis, AS

Johnson, TM

Bullen, TD

机构：

[1] Univ Illinois, Dept Geol, Urbana, IL 61801 USA

[2] US Geol Survey, Div Water Resources, Menlo Pk, CA 94025 USA

来源：

SCIENCE | 2002年 / 295卷 / 5562期

关键词：

D O I：

10.1126/science.1068368

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 Cr-53/Cr-52 ratio of the product was 3.4 +/- 0.1 per mil less than that of the reactant. Cr-53/Cr-52 shifts in water samples indicate the extent of reduction, a critical process that renders toxic Cr(VI) in the environment immobile and less toxic.

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页码：2060 / 2062

页数：3

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