Polyethyleneimine-integrated composite sorbents for emerging pollutants remediation in water: Cross-linking strategy and tailored affinity

The removal and enrichment of pollutants in industrial wastewater using efficient adsorption processes have been a hot scientific topic in the field of environmental chemistry and green chemistry. Compared with the progress in the design, synthesis, and performance of polyethyleneimine-modified adsorbent materials at home and abroad, there are few reviews on how to modify polyethyleneimine (PEI) in adsorbent materials through functional group reactions. Therefore, this review attempts to provide a systematic review of how PEI can prepare adsorbent materials by functional group reaction and the adsorption mechanism of inorganic metal ions, phosphates, and dyes in wastewater by PEI. On this basis, future research directions of adsorbent materials are prepared by PEI prospects.