https://scholars.lib.ntu.edu.tw/handle/123456789/598159
標題: | Shape stable poly(vinyl alcohol) hydrogels with immobilized metal hexacyanoferrates for cesium removal from waters | 作者: | Wang P.-H Chang Y.-R Chen M.-L Lo Y.-K Lee D.-J. DUU-JONG LEE |
關鍵字: | Adsorption;Cesium;Isotherm;Metal hexacynoferrate;PVA;adsorption;cesium;isotherm;pollutant removal;sulfate;transition element;ferric ion;ferrocyanide;polyvinyl alcohol;human;hydrogel;water pollutant;Ferric Compounds;Ferrocyanides;Humans;Hydrogels;Polyvinyl Alcohol;Water Pollutants, Chemical | 公開日期: | 2022 | 卷: | 29 | 期: | 9 | 起(迄)頁: | 12427-12433 | 來源出版物: | Environmental Science and Pollution Research | 摘要: | The metal hexacyanoferrates with transition metal ions to replace ferric ions in the face center cubic structure of Prussian blue (PB) crystals are candidate adsorbents for radioactive cesium ions in waters. This study for the first time synthesized the shape stable poly(vinyl alcohol) (PVA) hydrogels with immobilized metal hexacynoferrate (PB analogue) that can be stored at dry and can efficiently adsorb cesium ions from waters after rewetting. A total of eight PB analogue particles in two families M3[Fe(III)(CN)6]2 (MFe(III)) or M4[Fe(II)(CN)6]2 (MFe(II)) with M=Zn, Ni, Cu, or Co were synthesized and were immobilized in the PVA hydrogels following boric acid and sulfate crosslinking. The produced PVA-PB analogue hydrogels are all stable in shape after dry and rewet, and the rewet hydrogels can adsorb cesium ions from waters at much higher rates. As predicted by the diffusion-reaction model, the apparent reaction constants for cesium ion adsorption are 4.2×10?4 1/s, 3.4×10?4 1/s, 3.9×10?4 1/s, 4.1×10?4 1/s, 4.1×10?4 1/s, 3.8×10?4 1/s, 1.1×10?3 1/s, and 9.6×10?4 1/s, for ZnFe(III), ZnFe(II), NiFe(III), NiFe(II), CuFe(III), CuFe(II), CoFe(III), and CoFe(II), respectively. The corresponding maximum adsorption capacities based on Langmuir isotherm model at 25 °C are 232.6 mg/g, 389.0 mg/g, 193.9 mg/g, 256.8 mg/g, 388.2 mg/g, 395.1 mg/g, 297.3 mg/g, and 391.2 mg/g, respectively. The use of PVA-CoFe(III) is the candidate for enhanced Cs removal from waters comparing the use of other PB analogues as adsorbent. ? 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108237654&doi=10.1007%2fs11356-021-14937-9&partnerID=40&md5=b9b368d6c515dccd5b0f9e4de635f23e https://scholars.lib.ntu.edu.tw/handle/123456789/598159 |
ISSN: | 09441344 | DOI: | 10.1007/s11356-021-14937-9 |
顯示於: | 化學工程學系 |
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