ABSTRACT The rapid consumption of electronic products has led to a significant accumulation of electronic waste (e‐waste) that contains a considerable amount of gold (Au). Recovery of Au from e‐waste is significant for the potential sustainability of industry and society. Porous organic polymers (POPs) recently show promising applications in Au recovery; most of them are designed as neutral structures. Here, we report an ion‐enriched POP (PiP‐1) through the polycondensation of the ionic guanidine‐based and imidazole‐based building blocks. Attributed to its highly charged frameworks, PiP‐1 displays ultrahigh Au adsorption capacity of 1530.9 mg g −1 , with excellent selectivity and recyclability. Moreover, PiP‐1 also shows promising selective capture ability toward Au 3+ ions in the actual CPU leaching solution test. Our work illustrates that developing high ion‐density frameworks could be an efficient strategy to enhance the Au adsorption performance, and ionic POPs hold great potentials as gold adsorbents from actual e‐waste.
Zhang et al. (Fri,) studied this question.