Yilong Hua , Xue Meng , Guodong Zhao , Mi Li , Xiaoyan Wu , Xiaowen Zhang , Qing Liu , Tao Cai , Jianping Yang , Wei-xian Zhang , Nan Hu
{"title":"硫修饰Fe0纳米颗粒固定化铀:U(VI)捕获动力学及长期稳定性评价","authors":"Yilong Hua , Xue Meng , Guodong Zhao , Mi Li , Xiaoyan Wu , Xiaowen Zhang , Qing Liu , Tao Cai , Jianping Yang , Wei-xian Zhang , Nan Hu","doi":"10.1016/j.jhazmat.2025.138093","DOIUrl":null,"url":null,"abstract":"<div><div>The modification of nanoscale zero-valent iron (nZVI) by loading or incorporating sulfur into the iron crystal lattice can augment their efficacy in the removal of hydrophobic contaminants from wastewater. Nevertheless, the reactivity of sulfur-embedded nZVI (SnZVI) in immobilizing hydrophilic uranyl ions and the long-term stability of the sequestered uranium has received little attention. This study employed Na<sub>2</sub>S<sub>2</sub>O<sub>4</sub> to modify the nZVI with different S/Fe molar ratios (0.1 and 0.3), following one-step and two-step approaches to create SnZVI-1 and SnZVI-2, respectively. Both experimental and theoretical calculation results revealed that the U(VI) ions exhibited low affinity for the surface of SnZVI. Additionally, the hindered electron transfer between the electron donors of SnZVI and U(VI) led to a diminished U(VI) reduction efficiency for SnZVI-1 (50.71%~67.74%) and SnZVI-2 (68.03%~86.89%), inferior to that of nZVI (78.63%~90.78%). Consequently, the uranium detachment ratios of SnZVI (0.04%~0.85%) during the 210-day stability assessment were higher compared to those of nZVI (0.04%~0.34%). Hence, this study offered novel insights into how sulfur affected the adsorptive and redox properties of nZVI for U(VI) immobilization through solid and aqueous samples analyses, complemented by theoretical calculations. The findings are instrumental in designing SnZVI for effective and environmentally sound treatment of uranium-contaminated radioactive wastewater.</div></div>","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"492 ","pages":"Article 138093"},"PeriodicalIF":11.3000,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Uranium Immobilization via Sulfur-Modified Fe0 Nanoparticles: U(VI) Trapping Kinetics and Long-Term Stability Evaluation\",\"authors\":\"Yilong Hua , Xue Meng , Guodong Zhao , Mi Li , Xiaoyan Wu , Xiaowen Zhang , Qing Liu , Tao Cai , Jianping Yang , Wei-xian Zhang , Nan Hu\",\"doi\":\"10.1016/j.jhazmat.2025.138093\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The modification of nanoscale zero-valent iron (nZVI) by loading or incorporating sulfur into the iron crystal lattice can augment their efficacy in the removal of hydrophobic contaminants from wastewater. Nevertheless, the reactivity of sulfur-embedded nZVI (SnZVI) in immobilizing hydrophilic uranyl ions and the long-term stability of the sequestered uranium has received little attention. This study employed Na<sub>2</sub>S<sub>2</sub>O<sub>4</sub> to modify the nZVI with different S/Fe molar ratios (0.1 and 0.3), following one-step and two-step approaches to create SnZVI-1 and SnZVI-2, respectively. Both experimental and theoretical calculation results revealed that the U(VI) ions exhibited low affinity for the surface of SnZVI. Additionally, the hindered electron transfer between the electron donors of SnZVI and U(VI) led to a diminished U(VI) reduction efficiency for SnZVI-1 (50.71%~67.74%) and SnZVI-2 (68.03%~86.89%), inferior to that of nZVI (78.63%~90.78%). Consequently, the uranium detachment ratios of SnZVI (0.04%~0.85%) during the 210-day stability assessment were higher compared to those of nZVI (0.04%~0.34%). Hence, this study offered novel insights into how sulfur affected the adsorptive and redox properties of nZVI for U(VI) immobilization through solid and aqueous samples analyses, complemented by theoretical calculations. The findings are instrumental in designing SnZVI for effective and environmentally sound treatment of uranium-contaminated radioactive wastewater.</div></div>\",\"PeriodicalId\":361,\"journal\":{\"name\":\"Journal of Hazardous Materials\",\"volume\":\"492 \",\"pages\":\"Article 138093\"},\"PeriodicalIF\":11.3000,\"publicationDate\":\"2025-04-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Hazardous Materials\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0304389425010088\",\"RegionNum\":1,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Hazardous Materials","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304389425010088","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
Uranium Immobilization via Sulfur-Modified Fe0 Nanoparticles: U(VI) Trapping Kinetics and Long-Term Stability Evaluation
The modification of nanoscale zero-valent iron (nZVI) by loading or incorporating sulfur into the iron crystal lattice can augment their efficacy in the removal of hydrophobic contaminants from wastewater. Nevertheless, the reactivity of sulfur-embedded nZVI (SnZVI) in immobilizing hydrophilic uranyl ions and the long-term stability of the sequestered uranium has received little attention. This study employed Na2S2O4 to modify the nZVI with different S/Fe molar ratios (0.1 and 0.3), following one-step and two-step approaches to create SnZVI-1 and SnZVI-2, respectively. Both experimental and theoretical calculation results revealed that the U(VI) ions exhibited low affinity for the surface of SnZVI. Additionally, the hindered electron transfer between the electron donors of SnZVI and U(VI) led to a diminished U(VI) reduction efficiency for SnZVI-1 (50.71%~67.74%) and SnZVI-2 (68.03%~86.89%), inferior to that of nZVI (78.63%~90.78%). Consequently, the uranium detachment ratios of SnZVI (0.04%~0.85%) during the 210-day stability assessment were higher compared to those of nZVI (0.04%~0.34%). Hence, this study offered novel insights into how sulfur affected the adsorptive and redox properties of nZVI for U(VI) immobilization through solid and aqueous samples analyses, complemented by theoretical calculations. The findings are instrumental in designing SnZVI for effective and environmentally sound treatment of uranium-contaminated radioactive wastewater.
期刊介绍:
The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.