![]() ![]() Compared with the olivine phase, the maricite phase (M-NMP) is thermodynamically stable. NaMnPO4 (NMP), as a typical NASICON structural material, has two different phases: maricite and olivine. The unit structure composed of angle sharing MO 6 octahedra and PO 4 tetrahedra form a 3D framework with migration channels for easy release of Na +. The composition of NASICON material can be denoted as Na xM y(XO 4) 3, where M is the transition metals (such as V, Fe, Mn, etc.), and X is S, P, Si, As. Recently, sodium superionic conductor (NASICON)-structured phosphates have been widely studied because of their fast Na + diffusion rate and good structural stability. ![]() Therefore, the development of new techniques and materials for the fast and effective removal of 90Sr from waste water is vital and urgent. However, these adsorbents exhibit low selectivity and long equilibrium adsorption times when adsorbing 90Sr from wastewater, thus making them unsuitable for removing 90Sr from wastewater. Commercially available conventional adsorbents, such as zeolites, resins, activated carbon, and minerals, have been used to remove 90Sr. Among these purification methods, adsorption has attracted considerable scholarly attention owing to its low cost, simple operation, less susceptibility to secondary contamination, superior adsorption capacity, and selectivity for systems with low concentrations of the target ions. To date, a variety of technologies, including adsorption, filtration, membrane separation, ion exchange resin, and chemical precipitation methods, have been used to capture 90Sr from contaminated nuclear wastewater. Thus, the study of the efficient removal of 90Sr in a water solution environment system is crucial. In addition, 90Sr can be easily absorbed by the human body and remains in bones, which can eventually lead to bone cancer and leukemia. ![]() 90Sr is the product of 235U nuclear fission, and it is considered one of the most dangerous radionuclides owing to its long half-life, high fission yield, and high solubility in solution. With the increasing demand for energy in modern society, nuclear energy has become one of the most important nonrenewable energy worldwide. In this research, we investigated the feasibility of ultrafast strontium capture by sodium superionic conductor structured phosphates and explained the ultrafast strontium adsorption mechanism of NASICON materials through XPS. At higher concentrations of other competing ions (Na, K, Ca, Mg, and Cs), the adsorbent exhibited higher selectivity towards Sr 2+.TEM, XPS, and XRD analyses revealed that ion exchange was the main mechanism for the ultrafast adsorption of Sr 2+. The adsorption process was spontaneous, endothermic, and feasible. Especially the equilibrium time of 2 min for strontium absorption by and a maximum theoretical adsorption capacity of 361.36 mg/g. showed efficient and rapid removal of strontium ions in adsorption kinetics, isothermal adsorption, solution pH, and interfering ions concentration tests. In this study, a mesoporous composite phase sodium superionic conductor ( ) was synthesized by the droplet template method, and the rapid capture of Sr 2+ from wastewater was achieved by constructing a nano-heterogeneous interface to increase the ion diffusion rate. It is easily absorbed by the human body, thus greatly threatening the environment and the human body. Strontium, the main component of radioactive nuclear wastewater, is characterized by a high fission yield and an extended half-life. ![]()
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