Mandiwana Khakhathi L, Resane Tabby, Panichev Nikolay, Ngobeni Prince
Department of Chemistry, Tshwane University of Technology, Private Bag X31, Rosslyn 0200, South Africa.
J Hazard Mater. 2006 Sep 21;137(2):1241-5. doi: 10.1016/j.jhazmat.2006.04.015. Epub 2006 Apr 25.
The impact of a chromium smelter on pollution was evaluated by determining Cr(VI) in topsoil, grass and tree bark by electrothermal atomic absorption spectrometry (ETAAS). It was found that bark reflected the levels of air pollution better than soil and grass due to its high accumulative ability of Cr(VI). The tree bark was contaminated with Cr(VI) by a factor of 9 than in soil. It is therefore suggested that the bark be used as an indicator of air pollution for long-term exposure. The concentration of Cr(VI) in the bark was always a fraction of the total concentration of Cr and ranges between 1.6 and 3%. The method used in the preparation of samples was validated by the analysis of certified reference materials.
通过电热原子吸收光谱法（ETAAS）测定表层土壤、草和树皮中的六价铬，评估了一家铬冶炼厂对污染的影响。研究发现，由于树皮对六价铬具有较高的累积能力，其比土壤和草更能反映空气污染水平。树皮中六价铬的污染程度比土壤高9倍。因此，建议将树皮用作长期暴露空气污染的指标。树皮中六价铬的浓度始终是铬总浓度的一小部分，范围在1.6%至3%之间。通过对有证标准物质的分析验证了样品制备中使用的方法。
