Abstract
A polymer-based nanofiber membrane with a high specific surface area, high porosity and abundant adsorption sites is demonstrated for selective trapping of radionuclides. The Prussian blue (PB)/poly(methyl methacrylate) (PMMA) nanofiber composites were successfully prepared through a one-step, single-nozzle electrospinning method. Various analytical techniques were used to examine the physical and chemical properties of PB nanoparticles and electrospun nanofibers. It is possible to enhance binding affinity and selectivity to radionuclide targets by incorporation of the PB nanoparticles into the polymer matrix. It is noteworthy that the maximum 133Cs adsorption capacity of hte PB/PMMA nanofiber filter is approximately 28 times higher than that of bulk PB, and the removal efficiency is measured to be 95% at 1 ppm of 133Cs. In addition, adsorption kinetics shows that the PB/PMMA nanofiber has a homogenous surface for adsorption, and all sites on the surface have equal adsorption energies in terms of ion-exchange between cyano groups of the introduced PB nanoparticles and radionuclides.
Highlights
Nuclear power plants have generated large quantities of highly radioactive materials due to the deterioration of nuclear facilities and unpredictable accidents [1,2]
The amorphous Prussian blue (PB) nanoparticles could be spontaneously formed via a chemical reaction in aqueous solutions
Adsorption of radioactive radionuclides was achievable by several specific interactions such physical ardadsoiorpactitoivne, crhaedmioincaulciloidne-esxwchaasnagceh, iaenvdabinletebrayctsieovnewrailthspbeocuifincd iwntaetrear.ctions such physical adsoTrpotivoenr,ifcyhethmeicPaBl inoann-oexpcahratincglee,foarnmdaitnitoenr,aactisocnanwniitnhgbeoluecntdrownamteirc.roscopy (SEM) image isToshvoewrifnyitnheFiPgBurnean1oap
Summary
Nuclear power plants have generated large quantities of highly radioactive materials due to the deterioration of nuclear facilities and unpredictable accidents [1,2]. It is still challenging to develop a new technology that can prevent the spread of radioactive contaminants from nuclear power plants. There have been studies on adsorbent materials using the PB nanoparticles for control over the radioactive caesium. A new web-type composite filter that can effectively adsorb radioactive contaminants was fabricated by using the electrospinning method. A synergy effect is anticipated by combining the high specific surface area of the nanofibers with PB nanoparticles possessing an excellent adsorption performance. The feasibility of filter reuse was demonstrated in the recycling system
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