A facile one-pot synthesis of ionic liquid@porous organic frameworks for rapid high-capacity removal of heavy metal ions, pesticides and aflatoxin from two non-food bioactive products

Without inert gas protection and extra assistance by energy field, a green, facile, and catalyst-free strategy to synthesize ionic liquid@porous organic frameworks (IL@POFs) with high efficiency was developed for the first time. Besides, they have high specific surface area, stability and sustainability. As the brutal facts, many industrial crops are easily polluted and then cause safety risks. Among above IL@POFs, 1-butyl-3-methylimidazolium proline salt@porous organic framework ([C 4 mim][ L -pro]@POF) exhibits rapid removal performance for typical heavy metal ions from Poria cocos (removing 100% Pb 2+ within 5 min; 207.47 mg/g for Pb 2+ and 62.85 mg/g for Cu 2+ ). The separation mechanisms are coordination, accompanied by ion exchange and electrostatic interaction. Moreover, 1-butyl-3-methylimidazolium hexafluorophosphate@porous organic framework ([C 4 mim][PF 6 ]@POF) could remove 85% triazophos and 93% aflatoxin B 1 (AFB 1 ) effectively from Radices trichosanthis within 5 min, and multiple intermolecular interactions contribute to its adsorption capacity and selectivity. Above sorbents can be reused after effective elution. The proposed strategy not only provides valuable reference for the high-efficient synthesis of IL@POFs but also opens up a new pathway to recycling contaminated industrial crops.