Adsorption and diffusion of cesium ions in zirconium(IV) iodomolybdate exchanger

A highly hydrophilic water-insoluble nanofiber composite as an efficient and easily-handleable adsorbent for the rapid adsorption of cesium from radioactive wastewater

“…8). 40 The results confirm the higher activity of the present c-PBNPs/PVA composite nanofibers towards the adsorption of radioactive Cs 75 from the wastewater. From the value of Cs adsorption rate, it was calculated that 1 g of c-PBNPs/PVA composite is enough to remove ~8 mg of Cs from the wastewater.…”

“…From the value of Cs adsorption rate, it was calculated that 1 g of c-PBNPs/PVA composite is enough to remove ~8 mg of Cs from the wastewater. Although the value is not higher when compared to the previous reports [9,10,[40][41][42][43][44], the proposed composite material has shown a faster Cs adsorption 80 rate in addition to the other advantages such as easy-handling and separation. There are three possible reasons for the higher activity of this newly developed c-PBNPs/PVA composite nanofibers: (1) higher surface area and the three dimensional structure of the cPBNPs/PVA composite nanofibers web, (2) higher hydrophilic 85 nature of the composite and (3) water-insoluble property of the cPBNPs/PVA composite nanofibers.…”

“…First, a 1.2 g of PVA (12 wt%) was dissolved in 10 mL of distilled water and the solution mixture was stirred at 80°C for 3 h. After cooling to 27°C, a 24 wt% of PBNPs (based on the wt% of PVA solution) was mixed into the resultant PVA 35 solution (12 wt%) and stirred at 27°C for 24 h. Finally, a 12.5 wt% of GA (based on the wt% of PVA) was mixed into the above resultant mixture (PVA/PBNPs solution) to obtain a homogeneous PVA/PBNPs/GA solution. The resultant PVA/PBNPs/GA solution was used as an electrospinning solution 40 for the preparation of nanofiber composite.…”

“…3 3 ) is also known as Prussian blue (PB), often used as an efficient adsorbent for the removal of radioactive Cs from the wastewater. 5,6 Very recently, the Japanese National Institute of Advanced Industrial Science and Technology (AIST) 40 has developed PB nanoparticles (PBNPs) with the particle size of 10-20 nm. 7 Interestingly, due to the high specific surface area, the PBNPs has showed an excellent adsorption efficiency of Cs (about 100%).…”

“…27 Similarly, the FT-IR spectrum of the samples exhibited a peak at 2110 cm -1 attributed to the -C≡N stretching in the formed [FeII-CN-FeIII] structure, which indicates the presence of PBNPs. 28 Apart from the 35 characteristic absorption band, there are two significant changes in the FT-IR peaks (-OH and -C-O-C-) obviously confirm the cross-linking of PVA with GA. 29 In the FI-IR spectrum of cPBNPs/PVA composites nanofibers, the intensity of the adsorption peak at 3300 cm -1 (-OH stretching) decreased and 40 simultaneously the adsorption peak at 1150-1085 cm -1 (-C-O-Cstretching) increased when compared with that of the uncrosslinked nanocomposite nanofibers (PVA/PBNPs/GA). These results confirm that the -OH groups in the PVA and the -CHO groups in GA typically reacted to form an acetal groups or ether 45 linkages during the cross-linking process (Fig.…”