The study of mechanism of cesium sorption by modified aluminosilicates

Воронина, А. В.; Orlov, P. A.; Mashkovtsev, Maxim A.; Семенищев, В. С.

doi:10.1063/1.5055185

Cited by 2 publications

(1 citation statement)

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“…Moreover, the determination coefficient R 2 of the Freundlich adsorption model was the closest to 1, indicating that the adsorption of cesium ions by MPBNs was the most consistent with the Freundlich adsorption model. It was proven that the adsorption process of cesium ions by MPBNs belonged to multilayer adsorption and there were different adsorption sites, which indicated a heterogeneous adsorption process [37]. Moreover, the results indicated that MPBNs with nanostructures have a good affinity for cesium ions, and the adsorption process of cesium ions is favorable (0 < 1/n = 0.7085 < 1), being easier to carry out.…”

Section: Adsorption Isotherms Of Mpbnsmentioning

confidence: 97%

Separation and Removal of Radionuclide Cesium from Water by Biodegradable Magnetic Prussian Blue Nanospheres

Feng

Cao

et al. 2022

Processes

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As the main component of radioactive wastewater, the cesium ion has seriously endangered the environment and human health. Prussian blue nanoparticles (PB NPs) are used as adsorbents for the purification of cesium-containing wastewater because of their ability to selectively adsorb cesium ions. In this work, novel magnetic Prussian blue nanospheres (MPBNs) were developed from polylactic acid nanospheres as a carrier, loaded with Fe3O4 nanoparticles (Fe3O4 NPs) inside and PB NPs outside for the removal of cesium ions with the help of magnetic separation. Meanwhile, the effects on the adsorption efficiency of MPBNs, such as pH, time, temperature and initial concentration of cesium ion solution, were studied. The adsorption isotherms, kinetic models and adsorption thermodynamics were investigated to research the absorption mechanism. The results showed that MPBNs were spherical with a rough surface, and their particle size, iron content and saturation magnetization were 268.2 ± 1.4 nm, 40.01% and 41.71 emu/g, which can be recovered by magnetic separation. At 293 K, MPBNs could reduce the cesium ion solution from 40 mg/L to 4.8 mg/L, and its cesium ion removal rate and adsorption capacity were 82.46% and 16.49 mg/g, respectively. The optimum pH of MPBNs for cesium ion adsorption was 5~9, the adsorption equilibrium time was 60 min, and the maximum adsorption capacity was 17.03 mg/g. In addition, MPBNs were separated rapidly by an external magnetic field, and the adsorption process was an endothermic reaction. The adsorption isotherm and kinetics of MPBNs were in accordance with the Freundlich model and quasi-second-order fitting model, respectively, and the adsorption process of MPBNs was controlled by the diffusion step in particles. Notably, these MPBNs could be effectively separated from water by a magnetic field, facilitating engineering applications in cesium-containing wastewater.

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Section: Adsorption Isotherms Of Mpbnsmentioning

confidence: 97%