Jayaprakasam Selvakumar, Kumari Anshul, Padala A. Nishad, Bhaskarapillai Anupkumar, Subramanian Srinivasan, Nethapakkam R. Jawahar, Appadurai L. Rufus, Jayantha K. Gayen, Tulasi V. Krishna Mohan
{"title":"基于 Ce(OH)4 的纳米晶材料:用于高碱性放射性废液的钌选择性吸附剂","authors":"Jayaprakasam Selvakumar, Kumari Anshul, Padala A. Nishad, Bhaskarapillai Anupkumar, Subramanian Srinivasan, Nethapakkam R. Jawahar, Appadurai L. Rufus, Jayantha K. Gayen, Tulasi V. Krishna Mohan","doi":"10.1515/ract-2023-0194","DOIUrl":null,"url":null,"abstract":"Cerium hydroxide, Ce(OH)<jats:sub>4</jats:sub> (Ce), has been synthesised and assessed as a Ru-selective adsorbent for treating alkaline radioactive liquid waste. Infrared spectroscopy, thermal analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy investigations confirmed the successful formation of nanocrystalline Ce from Ce(NO<jats:sub>3</jats:sub>)<jats:sub>3</jats:sub>·6H<jats:sub>2</jats:sub>O. Selective removal of <jats:sup>106</jats:sup>Ru from the ion-exchange effluent of intermediate-level liquid waste (ILW) by Ce was assessed using a high-pure germanium (HPGe) gamma-ray spectrometer. The calculated average distribution coefficient (<jats:italic>k</jats:italic> <jats:sub>D</jats:sub>) was ∼200 mL/g. The percentage removal of <jats:sup>106</jats:sup>Ru using Ce by varying time, [<jats:sup>106</jats:sup>Ru] and [Ce] was calculated. The adsorption of <jats:sup>106</jats:sup>Ru on Ce follows pseudo-second-order and Freundlich isotherms. The calculated <jats:italic>Q</jats:italic> <jats:sub>max</jats:sub> was 93,584 Bq/g. Accelerated leaching studies of the Ru-laden Ce cement product were carried out and found suitable for transport and disposal. Further, Ce-Polyether sulphone (Ce-PES) and Ce-Chitosan (CeC) composites were prepared and assessed for their Ru-uptake capacity for engineering scale application.","PeriodicalId":21167,"journal":{"name":"Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Nanocrystalline Ce(OH)4-based materials: ruthenium selective adsorbent for highly alkaline radioactive liquid waste\",\"authors\":\"Jayaprakasam Selvakumar, Kumari Anshul, Padala A. Nishad, Bhaskarapillai Anupkumar, Subramanian Srinivasan, Nethapakkam R. Jawahar, Appadurai L. Rufus, Jayantha K. Gayen, Tulasi V. Krishna Mohan\",\"doi\":\"10.1515/ract-2023-0194\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Cerium hydroxide, Ce(OH)<jats:sub>4</jats:sub> (Ce), has been synthesised and assessed as a Ru-selective adsorbent for treating alkaline radioactive liquid waste. Infrared spectroscopy, thermal analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy investigations confirmed the successful formation of nanocrystalline Ce from Ce(NO<jats:sub>3</jats:sub>)<jats:sub>3</jats:sub>·6H<jats:sub>2</jats:sub>O. Selective removal of <jats:sup>106</jats:sup>Ru from the ion-exchange effluent of intermediate-level liquid waste (ILW) by Ce was assessed using a high-pure germanium (HPGe) gamma-ray spectrometer. The calculated average distribution coefficient (<jats:italic>k</jats:italic> <jats:sub>D</jats:sub>) was ∼200 mL/g. The percentage removal of <jats:sup>106</jats:sup>Ru using Ce by varying time, [<jats:sup>106</jats:sup>Ru] and [Ce] was calculated. The adsorption of <jats:sup>106</jats:sup>Ru on Ce follows pseudo-second-order and Freundlich isotherms. The calculated <jats:italic>Q</jats:italic> <jats:sub>max</jats:sub> was 93,584 Bq/g. Accelerated leaching studies of the Ru-laden Ce cement product were carried out and found suitable for transport and disposal. Further, Ce-Polyether sulphone (Ce-PES) and Ce-Chitosan (CeC) composites were prepared and assessed for their Ru-uptake capacity for engineering scale application.\",\"PeriodicalId\":21167,\"journal\":{\"name\":\"Radiochimica Acta\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2024-02-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Radiochimica Acta\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1515/ract-2023-0194\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiochimica Acta","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1515/ract-2023-0194","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
摘要
氢氧化铈(Ce(OH)4 (Ce))已被合成并评估为一种处理碱性放射性液体废物的 Ru 选择性吸附剂。红外光谱、热分析、扫描电子显微镜和能量色散 X 射线光谱研究证实,Ce(NO3)3-6H2O 成功地形成了纳米晶 Ce。使用高纯锗(HPGe)伽马射线光谱仪评估了 Ce 从中级液体废物(ILW)离子交换流出物中选择性去除 106Ru 的情况。计算得出的平均分布系数(k D)为 200 mL/g。通过改变时间、[106Ru]和[Ce],计算了利用 Ce 去除 106Ru 的百分比。106Ru 在 Ce 上的吸附遵循伪二阶和 Freundlich 等温线。计算得出的最大 Q 值为 93,584 Bq/g。对含有 Ru 的 Ce 水泥产品进行了加速沥滤研究,发现其适合运输和处置。此外,还制备了 Ce 聚醚砜(Ce-PES)和 Ce 壳聚糖(CeC)复合材料,并对其在工程规模应用中的 Ru 吸收能力进行了评估。
Cerium hydroxide, Ce(OH)4 (Ce), has been synthesised and assessed as a Ru-selective adsorbent for treating alkaline radioactive liquid waste. Infrared spectroscopy, thermal analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy investigations confirmed the successful formation of nanocrystalline Ce from Ce(NO3)3·6H2O. Selective removal of 106Ru from the ion-exchange effluent of intermediate-level liquid waste (ILW) by Ce was assessed using a high-pure germanium (HPGe) gamma-ray spectrometer. The calculated average distribution coefficient (kD) was ∼200 mL/g. The percentage removal of 106Ru using Ce by varying time, [106Ru] and [Ce] was calculated. The adsorption of 106Ru on Ce follows pseudo-second-order and Freundlich isotherms. The calculated Qmax was 93,584 Bq/g. Accelerated leaching studies of the Ru-laden Ce cement product were carried out and found suitable for transport and disposal. Further, Ce-Polyether sulphone (Ce-PES) and Ce-Chitosan (CeC) composites were prepared and assessed for their Ru-uptake capacity for engineering scale application.