Covalent Organic\nFramework Packed Nanoporous Membrane\nfor Continuous Removal of Bisphenol A from Agricultural Irrigation\nWastewater

BPA, a typical endocrine disruptor, poses a significant\nthreat\nto the growth of crops and thereby jeopardizes sustainable agriculture\nproducts and human health. In this work, a water-stabilized imine\ncovalent organic framework (TpBD-COF) packed nanochannel membrane\nwas constructed. The TpBD-COF membrane achieves high selective removal\nof BPA attributed to the subdivision of the pores by the filled COF,\nwhich further reduces the porous size and effectively eliminates the\ndistance barrier between the selective sites of TpBD-COF membranes\nand BPA. The selective removal ratio of BPA was 5.79 times higher\nthan that of the bare membrane, while the removal capacity reached\n6.78 nM cm<sup>–2</sup> min<sup>–1</sup>. It can eliminate\nBPA from irrigation wastewater and ensure crop growth. The application\nof COF-filled nanoporous membrane provides not only a size-matching\nstrategy for the development of specific continuous removal of BPA\nbut also a theoretical reference for membrane removal of other organic\npollutants in agricultural irrigation water environment.