The precious metals enriched residue of copper anode slime (PM-CAS) obtained from our previous study, creates favorable conditions for recycling resource. In this study, a green and economical process for resource recovery from PM-CAS is proposed. Results showed that 99.70% Ag and 98.65% Pd were successfully leached in 10 min by HNO₃-citric acid under optimized conditions with 99.81% Au retained in the residue. The reason could be the boosting effects came from the phase transition of PM-CAS and the enhanced leaching driving force by coupling HNO₃ and citric acid. It was found that NaCl precipitation with glucose reduction could recover 99.99% Ag with a purity of 99.99% from the leachate under preferred conditions. Meanwhile, 99.90% Pd could be easily recovered from the Ag-separated solution by the previously recycled Cu powder (RCu). In addition, 98.16% Au was recovered from the Au-retained residue by 1.0 mol/L HCl and 8.0 g/L KClO₃ leaching and RCu reduction. Comparably, the process could achieve the total recovery efficiencies of 99.69% Ag, 98.55% Pd, and 97.97% Au with cheaper and lower concentration reagents and RCu, which was promising to obtain a net profit of about $250,857/ton of PM-CAS. Therefore, the proposed process could be a potential choice for green and economical resource recovery from PM-CAS.

从我们之前的研究中获得的富贵金属铜阳极泥残渣（PM-CAS），为资源循环利用创造了有利条件。在本研究中，提出了一种绿色经济的 PM-CAS 资源回收工艺。结果表明，在优化的条件下，HNO ₃ -柠檬酸在10 min内成功浸出99.70%的Ag和98.65%的Pd，残渣中保留了99.81%的Au。原因可能是 PM-CAS 的相变和耦合 HNO _{3增强的浸出驱动力的促进作用}和柠檬酸。结果表明，在优选的条件下，葡萄糖还原的 NaCl 沉淀可以从渗滤液中回收 99.99% 纯度为 99.99% 的 Ag。同时，通过先前回收的铜粉（RCu）可以很容易地从银分离溶液中回收 99.90% 的钯。此外，通过 1.0 mol/L HCl 和 8.0 g/L KClO ₃浸出和 RCu 还原，从保留 Au 的残渣中回收了 98.16% Au。相比之下，该工艺可以实现99.69% Ag、98.55% Pd和97.97% Au的总回收率，并且使用更便宜和更低浓度的试剂和RCu，有望获得约250,857美元/吨PM-CAS的净利润。因此，所提出的工艺可能是从 PM-CAS 中进行绿色和经济资源回收的潜在选择。