Mineral phases of weathered and recent electric arc furnace dust.
Mineral phases of weathered and recent electric arc furnace dust.
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DOI：
10.1016/j.jhazmat.2007.10.041
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发表时间：
2008-06
影响因子：
13.6
通讯作者：
Fernanda Machado Martins;J. M. dos Reis Neto;Carlos Jorge da Cunha
中科院分区：
文献类型：
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作者：
Fernanda Machado Martins;J. M. dos Reis Neto;Carlos Jorge da Cunha
采用X射线荧光光谱（XFA）、粉末X射线衍射（XRD）、热重分析（TG）、扫描电子显微镜（SEM）、能谱仪（EDS）和傅里叶变换红外光谱（FTIR）对巴西南部钢铁工业产生的电弧炉粉尘（EAFD）进行了表征。一个定量相组成模型，占观察到的数据和形成的物理化学条件，假设为每种材料。一个湿糊状样品是从填埋场的最低部分收集的，对应于风化材料，而另一个样品是从填埋场的顶部收集的，对应于最近生产的材料。两种样品中存在的主要阳离子是铁、锌和铅，以及少量的锰、钙和硅。在两种材料中确定的主要矿物相为磁铁矿、菱锰矿和锌矿。最近的样品有硅铁矿，而风化样品有水白铅矿和水锌矿。
A weathered and a recent sample of electric arc furnace dust (EAFD), generated in a southern Brazilian steel industry, were characterized by X-ray fluorescence spectroscopy (XFA), powder X-ray diffraction (XRD), thermogravimetric analysis (TG), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) probe and Fourier transform infrared spectroscopy (FTIR). A quantitative phase composition model, that accounts for the observed data and for the physico-chemical conditions of formation, was postulated for each material. One sample, in the form of a wet paste, was collected from the lowest part of a landfill and corresponds to a weathered material whereas the other sample was collected from the top portion of the landfill and corresponds to a recently produced material. The dominant cations present in both samples are iron, zinc and lead with minor amounts of manganese, calcium and silicon. The dominant mineralogical phases identified in both materials are Magnetite, Franklinite and Zincite. The recent sample has Laurionite whereas the weathered sample has Hydrocerussite and Hydrozincite.