Potential application of a nanocomposite:HCNFe@polymer for effective removal of Cs (I) from nuclear waste |
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| Affiliation: | 1. Nuclear Fuel Cycle Research School, Nuclear Science & Technology Research Institute, P.O. Box 14155-1339, Tehran, Iran;2. Department of Chemical Engineering, Faculty of Engineering, University of Tehran, P.O. Box 11365-4563, Tehran, Iran;1. Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui, 230031, China;2. University of Science and Technology of China, Hefei, Anhui, 230027, China;1. Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl 796004 (India);2. Department of Health and Environment, Kwandong University, Gangneung 210-701 (Korea);3. Department of Environmental Engineering, Kwangwoon University, Seoul 139-701 (Korea);1. Actinide Chemistry Group, Japan Atomic Energy Agency (SPring-8), Hyogo 679-5148, Japan;2. Laser Processing Research Group, Japan Atomic Energy Agency (JAEA), Tokai-mura, Ibaraki-ken 319-1195, Japan;1. Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, 305-8565, Japan;2. Tokyo Power Technology Ltd., 2-3-6 Ohnodai, Chiba, 267-0056, Japan;3. Japan Vilene Company, Ltd., 7 Kitatone, Koga, 306-0213, Japan |
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| Abstract: | This study highlights new opportunities for the preparation of Cobalt Hexacyanoferrate(CoHCNF)@poly aniline nanocomposite as an adsorbent to efficiently remove Cs (I) ions from water. A chemical co-precipitation method was utilized to prepare CoHCNFe@poly aniline nanocomposite nanostructure. The TEM and SEM images of the product showed that it consists of semi-spherical particles with sizes ranging from 50 to 500 nm. Experimental parameters affecting Cs (I) sorption such as pH, adsorbent dosage, contact time, initial concentration of metal ion and temperature were studied. The maximum adsorption capacity (q) for cesium ions obtained from the Langmuir model at room temperature and 60 °C were 92.12 and 181.81 mg g−1 respectively. It is clear that this adsorbent has effective removal properties for adsorption of Cs(I) from radioactive waste compared with other adsorbents.The kinetic data were analyzed by the pseudo-first-order and the pseudo-second-order kinetic models; consequently, the pseudo-second-order model was the best to describe the adsorption of Cs (I) ions. The equilibrium data were fitted to the three isotherm models: Freundlich, Langmuir and Dubinin–Radushkevich (D–R), and as a result the Langmuir model produced the best fit for the experimental data. Thermodynamic parameters showed that the adsorption of Cs (I) ions onto the nanocomposite was endothermic and spontaneous. The mechanism of Cs (I) ions sorption was discussed. |
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| Keywords: | Nanocomposite Cesium (I) Hexacyanoferrates Polyaniline Sorption Adsorption |
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