The stability of iron phases presently used for disposal from metallurgical systems—A review
The stability of iron phases presently used for disposal from metallurgical systems—A review
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DOI：
10.1016/s0892-6875(00)00078-9
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发表时间：
2000-08
影响因子：
4.8
通讯作者：
N. Welham;K. Malatt;S. Vukcevic
中科院分区：
文献类型：
--
作者：
N. Welham;K. Malatt;S. Vukcevic
目前阶段用于处置铁和砷的废物，黄钾铁矾和臭葱石，从热力学的角度进行审查，使用严格的评估数据。对于臭葱石，它被证明，在文献中报道的溶解度的差异是由于不同的结晶度的起始阶段。给出臭葱石和黄钾铁矾的溶解度与pH和活性的等值线图，表明在pH 4-7时达到最小溶解度。然而，两个相都不稳定转化为针铁矿，臭葱石仅在pH 4以下稳定，黄钾铁矾在pH 7以下稳定。这些阶段的处置的实用性和影响进行了讨论，并为未来的处置方案提出了建议。
The current phases used for the disposal of iron and arsenical wastes, jarosite and scorodite, are examined from a thermodynamic viewpoint using critically assessed data. For scorodite, it is demonstrated that the differences in the solubility reported in the literature are due to starting phases of differing crystallinity. Contour plots of solubility vs pH and activity are presented for both scorodite and jarosite and show that the minimum solubility is achieved for pH 4–7. However, neither phase is stable towards transformation to goethite with scorodite only stable below pH 4 and jarosite below pH 7. The practicalities and implications of the disposal of these phases is discussed and recommendations for future disposal options are made.