An iodine-iodide system was investigated as an alternative lixiviant for HNO₃ for leaching precious metals from the end-of-life c-Si photovoltaic (PV) cell. A series of batch experiments were conducted for the optimization of leaching kinetics and thermodynamic equilibrium followed by a life cycle assessment (LCA) using data from the experiments. The results showed that more than 95% of Ag and Al leached out within the first 5 min. The optimum conditions for equilibrium leaching were as follows: solid to liquid ratio of 1:10 for Ag (1:9 ml for Al), and I₂ concentration of 0.35 M for Ag (0.3 M for Al), with I^- concentration of 0.7 M. In addition, selective leaching of Ag could also be accomplished by adjusting the reaction pH to 9.6%, and 93% of reproducibility was achieved via the rejuvenation of the exhausted leaching solution, which can benefit the subsequent recovery process. The leaching efficiency of iodine-iodide system was nearly comparable to that of HNO₃, and the environmental impacts of the two cycle of continuous process with rejuvenation of the iodine leaching solution can be effectively reduced especially in the acidification & eutrophication, respiratory effect, and mineral extraction categories with subsequent exclusion of the additional neutralization process.

研究了一种碘碘化物体系，作为HNO ₃的另一种浸滤剂，用于从寿命终止的c-Si光伏（PV）电池中浸出贵金属。进行了一系列分批实验，以优化浸出动力学和热力学平衡，然后使用实验数据进行生命周期评估（LCA）。结果表明，在开始的5分钟内，有超过95％的Ag和Al浸出。为平衡浸出的最佳条件如下：固体至1:10为银液比（1：9毫升Al）和我₂为银（0.3M为Al）的浓度的0.35M的，与I ^-浓度为0.7M。另外，还可通过将反应pH调节至9.6％来进行银的选择性浸出，并且通过使浸出的浸出液再生，可实现93％的重现性，这将有利于后续的回收过程。碘-碘化物体系的浸出效率几乎与HNO ₃相当，并且可以有效地减少连续过程的两个循环伴随着碘浸出溶液的再生对环境的影响，尤其是在酸化和富营养化，呼吸作用和矿物提取类别，随后不包括其他中和过程。