Ding Rui, Chen Shenghuang, Chen Mohan, Lu Jitao, Zhang Xiaomei
School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.
University of California Irvine, California, United States.
J Colloid Interface Sci. 2026 Jan;701:138702. doi: 10.1016/j.jcis.2025.138702. Epub 2025 Aug 16.
Developing advanced functional adsorbents capable of selectively recovering gold from electronic waste (e-waste) and enriching trace amounts of gold from seawater is a critical technical imperative for advancing a sustainable economy. In this study, a cationic pyridine porphyrin-based porous organic polymer (Pyd-PPOPs-Br) was rationally designed and presented via a one-pot bottom-up approach by integrating cationic pyridine-based building blocks with pyrrole. The incorporation of positively charged pyridine sites and redox-active porphyrin rings conferred Pyd-PPOPs-Br with an ultrahigh gold recovery capacity of 3.79 g/g, along with exceptional efficacy in concentrating trace and ultra-trace gold from both deionized water and seawater matrices. The exceptional adsorption performance of Pyd-PPOPs-Br was elucidated through comprehensive characterization and density functional theory (DFT) calculations. In practical validation, the material selectively sequestered 99.98 % of Au (III) ions from simulated e-waste leachates. Furthermore, a laboratory-scale fixed-bed adsorption device packed with Pyd-PPOPs-Br demonstrated comparable separation efficiency, highlighting its strong potential for scalable and long-term operation. This study establishes a foundational strategy for precious metal recovery using ion-framed porous organic polymers (POPs) and offers valuable design insights for developing functionally tailored adsorbents to address challenges in resource sustainability.
开发能够从电子垃圾（电子废弃物）中选择性回收金并从海水中富集痕量金的先进功能吸附剂，是推动可持续经济发展的一项关键技术需求。在本研究中，通过将基于阳离子吡啶的结构单元与吡咯整合，采用一锅法自下而上的方法合理设计并制备了一种基于阳离子吡啶卟啉的多孔有机聚合物（Pyd-PPOPs-Br）。带正电荷的吡啶位点和具有氧化还原活性的卟啉环的引入，赋予了Pyd-PPOPs-Br高达3.79 g/g的超高金回收能力，以及从去离子水和海水基质中富集痕量和超痕量金的卓越效能。通过全面表征和密度泛函理论（DFT）计算阐明了Pyd-PPOPs-Br优异的吸附性能。在实际验证中，该材料从模拟电子垃圾浸出液中选择性地螯合了99.98%的Au（III）离子。此外，填充有Pyd-PPOPs-Br的实验室规模固定床吸附装置表现出相当的分离效率，突出了其在可扩展和长期运行方面的强大潜力。本研究确立了使用离子框架多孔有机聚合物（POPs）进行贵金属回收的基础策略，并为开发功能定制吸附剂以应对资源可持续性挑战提供了有价值的设计见解。
