Synergistically strengthened 3D micro-scavenger cage adsorbent for selective removal of radioactive cesium
Autor: | Yuvaraj Haldorai, Go Woon Lee, Changhyun Roh, Krishnan Giribabu, Sung Chan Jang, Sung-Min Kang, Yun Suk Huh, Young-Kyu Han, Moon Seop Hyun, Young-Chul Lee |
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Rok vydání: | 2016 |
Předmět: |
inorganic chemicals
Prussian blue Multidisciplinary Aqueous solution Chemistry Inorganic chemistry Composite number chemistry.chemical_element Langmuir adsorption model 02 engineering and technology Microporous material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Article 0104 chemical sciences symbols.namesake chemistry.chemical_compound Adsorption Caesium symbols 0210 nano-technology Selectivity |
Zdroj: | Scientific Reports |
ISSN: | 2045-2322 |
Popis: | A novel microporous three-dimensional pomegranate-like micro-scavenger cage (P-MSC) composite has been synthesized by immobilization of iron phyllosilicates clay onto a Prussian blue (PB)/alginate matrix and tested for the removal of radioactive cesium from aqueous solution. Experimental results show that the adsorption capacity increases with increasing the inactive cesium concentration from 1 ppm to 30 ppm, which may be attributed to greater number of adsorption sites and further increase in the inactive cesium concentration has no effect. The P-MSC composite exhibit maximum adsorption capacity of 108.06 mg of inactive cesium per gram of adsorbent. The adsorption isotherm is better fitted to the Freundlich model than the Langmuir model. In addition, kinetics studies show that the adsorption process is consistent with a pseudo second-order model. Furthermore, at equilibrium, the composite has an outstanding adsorption capacity of 99.24% for the radioactive cesium from aqueous solution. This may be ascribed to the fact that the AIP clay played a substantial role in protecting PB release from the P-MSC composite by cross-linking with alginate to improve the mechanical stability. Excellent adsorption capacity, easy separation, and good selectivity make the adsorbent suitable for the removal of radioactive cesium from seawater around nuclear plants and/or after nuclear accidents. |
Databáze: | OpenAIRE |
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