Co-Fe PBAs were synthesized via co-precipitation and doped into a base membrane using phase inversion technology.Subsequently,a multifunctional nanofiltration membrane was prepared through interfacial polymerization for efficient Cs+ removal.Experimental results indicated that when the doping amount of Co-Fe PBAs was 60 mg,the prepared PBAs/PAN-P membrane exhibited excellent performance,with an adsorption capacity of approximately 254.33 mg/m2.The adsorption process conformed to the pseudo-second-order kinetic model and the Langmuir isothermal adsorption model,indicating that the adsorption was primarily chemical and featured monolayer adsorption.Moreover,the nanofiltration membrane prepared with the PBAs/PAN-P membrane as the base had a Cs+ rejection rate of 87.35% and water flux of 36.51 L/(m2·h·bar),significantly outperforming PAN-P NF membrane and commercial PSf NF membrane.
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