| 稳定同位素53Cr在地下水污染研究中的应用 |
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| 关键词:chromium 53Cr/52Cr groundwater pollution |
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| The Application of Stable Chromium Isotope 53Cr to the Study of Groundwater Pollution |
| Chromium, a common pollutant in surface water and groundwater, is widely used in electroplating, leather tanning, and corrosion protection.Under the oxidizing condition, Cr is highly soluble and mobile in the forms of chromater (CrO2-4)and bichro-mate (HCrO2-4)of Cr(Ⅵ)anions.Cr(Ⅵ)is a suspicious carcinogen. Under the reduction condition, Cr(Ⅵ)may convert to Cr(Ⅲ), which is insoluble, strongly adsorbed on the solid surface, and lexx toxic. Thereduction of Cr(Ⅵ)results in Cr stable-isotope fractionation. The analyses of Cr(Ⅵ) in the roundwater show enrichment of the heavy isotopes relative to plating baths.Cr(Ⅵ) redution has preferentially removed lighter isotopes from the groundwater. Stable Cr isotope ratios can thus serve as indicatios of the extent of Cr(Ⅵ)reduction in groundwater. Eq.1 was used to determine the reduction extents of two groundwater samples MV-9 and. MV, which tumed out to be 12.31% and 68%, respectively. |
| GAO Yongjuan,MA Teng,LIU Cunfu,CAI Hesheng.2005.The Application of Stable Chromium Isotope 53Cr to the Study of Groundwater Pollution[J].Acta Geoscientica Sinica,26(z1):296-298. |
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