Most known for its medicinal anti-osporotic properties, the ranelate ion exhibits an exceptional performance in reacting with gold(III) ions, generating stable gold nanoparticles (AuNP@Ran). The reaction proceeds rapidly at room temperature, under green, mild conditions. The AuNP@Ran nanoparticles are relatively inert in aqueous solution, and exhibit zeta potentials of about −50 mV at pH 6. This fact has been explored in this work for interacting with positively charged magnetite nanoparticles, leading to a novel magnetic nanohydrometallurgy method for the extraction of gold. The process has been investigated in detail, by monitoring the extraction and constructing the adsorption isotherms, using electronic and Raman spectroscopy. The nature of the nanoparticles association has been elucidated by exploring the SERS effect. The proposed method is able to extract even trace amounts of gold from aqueous solution. For its simplicity and safety, it can be a green alternative to most conventional gold extraction processes, without using harmful and toxic reagents, such as mercury and cyanide ions.

雷尼酸离子以其药用抗渗透特性而闻名，它在与金 (III) 离子反应时表现出卓越的性能，可生成稳定的金纳米粒子 (AuNP@Ran)。该反应在室温、绿色、温和的条件下迅速进行。AuNP@Ran 纳米粒子在水溶液中相对惰性，在 pH 值为 6 时表现出约 -50 mV 的 zeta 电位。在这项工作中已经探索了这一事实，用于与带正电的磁铁矿纳米粒子相互作用，从而产生了一种新的磁性纳米湿法冶金方法黄金的提取。通过使用电子和拉曼光谱监测萃取和构建吸附等温线，对该过程进行了详细研究。已经通过探索 SERS 效应阐明了纳米粒子缔合的性质。所提出的方法能够从水溶液中提取甚至痕量的金。由于其简单性和安全性，它可以成为大多数传统黄金提取工艺的绿色替代品，无需使用有害和有毒的试剂，例如汞和氰化物离子。