Rapid removal of radioactive cesium by polyacrylonitrile nanofibers containing Prussian blue.

Title Rapid removal of radioactive cesium by polyacrylonitrile nanofibers containing Prussian blue.
Authors H. Kim; M. Kim; W. Lee; S. Kim
Journal J Hazard Mater
DOI 10.1016/j.jhazmat.2017.12.050
Abstract

After the Fukushima Daiichi Nuclear Power Plant disaster in Japan in 2011, the demand drastically increased for efficient technology for the removal of radioactive cesium. Prussian blue (PB) nanoparticles have shown excellent adsorption ability toward Cs. In this study, we synthesized PB nanoparticles incorporated polyacrylonitrile nanofiber (PB/PAN). PB/PAN has the porous structure of nanofibers, with diameters of several hundred nanometers. PB nanoparticles can be incorporated successfully into the PAN matrix without any change to their intrinsic crystallinity and structure. The mesoporous structure of PB/PAN and the incorporation of PB nanoparticles led to an increase in the Brunauer-Emmett-Teller surface area and pore volume. In addition, PB/PAN exhibited excellent wettability with water. With simple filtering for the removal of radioactive cesium, PB/PAN showed high removal efficiency (87?±?3%) within 10?s for 10?mL of 137Cs solution (1000?Bq?L-1). In addition, the 137Cs removal by PB/PAN showed high removal efficiency (70?±?2%, after 1?h), even in the actual seawater medium (1000?Bq?L-1 of 137Cs). Therefore, PB-incorporated PAN nanofibers can be considered useful in the practical application of Cs removal from radioactive wastewater.

Citation H. Kim; M. Kim; W. Lee; S. Kim.Rapid removal of radioactive cesium by polyacrylonitrile nanofibers containing Prussian blue.. J Hazard Mater. 2017;347:106113. doi:10.1016/j.jhazmat.2017.12.050

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Cesium

See more Cesium products. Cesium (or Caesium) (atomic symbol: Ce, atomic number: 55) is a Block S, Group 1, Period 6 element with an atomic weight of 132.9054519. The number of electrons in each of Cesium's shells is 2, 8, 18, 18, 8, 1 and its electron configuration is [Xe]6s1. Cesium Bohr ModelThe cesium atom has a radius of 265 pm and a Van der Waals radius of 343 pm. Cesium is a member of the alkali group of metals. It is one of three metals that occur as a liquid at room temperature, the others being mercury and gallium. Elemental CesiumCesium's main commercial source is pollucite ore; however, it is also found in beryl, avogadrite, pezzottaite, and londonite. Cesium was discovered by Robert Bunsen and Gustav Kirchhoff in 1860 and first isolated by Carl Setterberg in 1882. In its elemental form, cesium has a silvery gold appearance. The word Cesium originates from the Latin word "caesius," meaning "sky blue," which refers to the vibrant blue lines in its spectrum.

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