Abstract As hazardous materials, jarosite residues pose severe challenge to the environment due to the presence of coexistent metals. Although acid washing conducted in the industrial process could recover acid extractable metals, a significant amount of strongly surface-bound, entrapped, and lattice-incorporated metals in jarosite residues could not be extracted easily. Fe(II) has received increasing attention for its effect on triggering the release of elements, as well as the transformation of Fe minerals. This study, for the first time, aims to simulate acid washing to assess the acid extractable metals (Zn, Pb, and Cu) in an actual jarosite residue with and without Fe(II)-induced transformation. Metals (i.e., Zn, Pb, and Cu) showed enhanced acid extractability in the process of 2nd acid washing after Fe(II)-induced natrojarosite transformation to goethite, especially for Pb and Cu, the highest concentrations of which were 17 and 7-time than before the transformation, respectively. In addition, it has also been found that metals have different behaviors during Fe(II)-induced transformation and acid washing, possibly due to their different speciation in jarosite residue. This room-temperature and impurity-free strategy of Fe(II)-induced transformation has the potential for jarosite residues treatment and metal recovery.

中文翻译：

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Fe(II) 诱导锌湿法冶金产生的黄钾铁矾残渣的转化：对酸洗过程中金属行为的影响

摘要 作为有害物质，黄钾铁矾由于与金属共存，对环境构成了严峻挑战。尽管在工业过程中进行的酸洗可以回收酸可提取的金属，但黄钾铁矾残留物中大量的强表面结合、截留和晶格结合的金属无法轻易提取。Fe(II) 因其在触发元素释放以及 Fe 矿物转化方面的作用而受到越来越多的关注。本研究首次旨在模拟酸洗，以评估具有和不具有 Fe(II) 诱导转化的实际黄钾铁矾残渣中的酸可萃取金属（Zn、Pb 和 Cu）。金属（即锌、铅、在 Fe(II) 诱导的钠黄钾铁矿转变为针铁矿后的第二次酸洗过程中，Pb 和 Cu) 显示出增强的酸提取性，尤其是 Pb 和 Cu，其最高浓度分别是转变前的 17 倍和 7 倍。此外，还发现金属在 Fe(II) 诱导的转化和酸洗过程中具有不同的行为，这可能是由于它们在黄钾铁矾残渣中的形态不同。这种 Fe(II) 诱导转变的室温和无杂质策略具有处理黄钾铁矾残渣和回收金属的潜力。还发现金属在 Fe(II) 诱导的转化和酸洗过程中具有不同的行为，这可能是由于它们在黄钾铁矾残渣中的不同形态。这种 Fe(II) 诱导转变的室温和无杂质策略具有处理黄钾铁矾残渣和回收金属的潜力。还发现金属在 Fe(II) 诱导的转化和酸洗过程中具有不同的行为，这可能是由于它们在黄钾铁矾残渣中的不同形态。这种 Fe(II) 诱导转变的室温和无杂质策略具有处理黄钾铁矾残渣和回收金属的潜力。