通过化学萃取和X射线光谱法测定碱性氧气转炉飞灰中的锌形态
Determination of zinc speciation in basic oxygen furnace flying dust by chemical extractions and X-ray spectroscopy.
作者信息
Sammut M L, Rose J, Masion A, Fiani E, Depoux M, Ziebel A, Hazemann J L, Proux O, Borschneck D, Noack Y
机构信息
CEREGE, Aix-Marseille Université, CNRS, CDF, IRD Europôle Méditerranéen de l'Arbois, BP 80, Aix en Provence, France.
出版信息
Chemosphere. 2008 Feb;70(11):1945-51. doi: 10.1016/j.chemosphere.2007.09.063. Epub 2007 Dec 4.
There is a growing concern regarding the environmental and public health risks associated with airborne particulate matter (PM). The basic oxygen furnace is one of the most important atmospheric dust sources of the steel manufacturing process. It emits dust enriched in heavy metal such as Zn, which is assumed to contribute to the toxic potential of atmospheric PM. Dust collected before and after the filtration system was analyzed to determine Zn speciation. To this end, a variety of analytical tools were used and a sequential extraction protocol has been specifically developed for iron and steel dust. The Zn speciation results obtained by EXAFS and sequential extraction were in excellent agreement. Before filtration, the speciation of Zn in BOF was 43% ZnFe(2)O(4), 23% ZnCO(3) and 16% ZnO. The same species were detected after filtration with different proportions. BOF dust after filtration contains more soluble Zn phases which may play a role in the toxic effects of the emissions.
人们越来越关注与空气中颗粒物（PM）相关的环境和公共健康风险。碱性氧气转炉是钢铁制造过程中最重要的大气粉尘源之一。它排放出富含锌等重金属的粉尘，据推测这会增加大气颗粒物的潜在毒性。对过滤系统前后收集的粉尘进行分析以确定锌的形态。为此，使用了多种分析工具，并专门开发了一种用于钢铁粉尘的连续提取方案。通过扩展X射线吸收精细结构（EXAFS）和连续提取获得的锌形态结果高度一致。过滤前，转炉中锌的形态为43%的铁酸锌（ZnFe₂O₄）、23%的碳酸锌（ZnCO₃）和16%的氧化锌（ZnO）。过滤后检测到相同的物种，但比例不同。过滤后的转炉粉尘含有更多可溶的锌相，这可能在排放物的毒性作用中起作用。
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