The neutralization treatment of acid mine drainage involves the oxidation of Fe(II), but little is known about the effects of co-existing minerals on the oxidation and hydrolysis of Fe(II) to iron oxides. Here we investigated the transformation of fresh and heated Fe(II) oxidation coprecipitates, which were synthesized in the presence and the absence of five co-existing minerals (montmorillonite, kaolin, quartz (SiO₂)_, aluminium oxide (Al₂O₃) and calcium carbonate (CaCO₃)). In the FeSO₄ system with montmorillonite or kaolin, the formation of lepidocrocite was inhibited with the increase of clay mineral contents. In the same system, heated coprecipitates of montmorillonite were mainly comprised of amorphous ferrihydrite and its transformation was retarded by the excess montmorillonite. In the FeCl₂ system with SiO₂, Al₂O₃ or CaCO₃, akaganeite formation was inhibited with the increase in the corresponding mineral contents. In the same system, goethite formation was blocked by either CaCO₃ or Al₂O₃ and the growth of lepidocrocite was inhibited by CaCO₃ or SiO₂. However, magnetite formation was enhanced by addition of CaCO₃. These findings are important for predicting products of abiotic Fe(II) oxidation during the neutralization of acid mine drainage and for better understanding the transformation of amorphous iron oxides in the complicated environmental matrix.

酸性矿山排水的中和处理涉及Fe(II)的氧化，但共存矿物对Fe(II)氧化水解为氧化铁的影响知之甚少。在这里，我们研究了新鲜和加热的 Fe(II) 氧化共沉淀物的转化，它们是在存在和不存在五种共存矿物（蒙脱石、高岭土、石英 (SiO ₂ ) _、氧化铝 (Al ₂ O ₃ ) 的情况下合成的）和碳酸钙 (CaCO ₃ ))。在 FeSO ₄与蒙脱石或高岭土的体系，随着粘土矿物含量的增加，纤铁矿的形成受到抑制。在同一体系中，蒙脱石的加热共沉淀物主要由无定形水铁矿组成，过量的蒙脱石阻碍了其转变。在含有SiO ₂、Al ₂ O ₃或CaCO _{3的FeCl 2}体系中，随着相应矿物含量的增加，赤金石的形成受到抑制。在同一系统中，CaCO ₃或Al ₂ O _{3阻碍针铁矿的形成，CaCO 3}或SiO ₂抑制纤铁矿的生长. 然而，通过添加CaCO ₃增强了磁铁矿的形成。这些发现对于预测酸性矿山排水中和过程中的非生物 Fe(II) 氧化产物以及更好地理解无定形氧化铁在复杂环境基质中的转化具有重要意义。