Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Yongchuan Wu,Jitao Chen,Zhongmin Liu,Ping Na,Zhibin Zhang
Removing trace radioactive 137 Cs from aquatic system is still a challenge. Herein, Zirconium Titanium Phosphate (ZTP) was prepared and utilized for Cs removal from seawater. The structure and morphology of ZTP were systematically characterized. ZTP exhibited typical feature of tetravalent metal acid, and the surface was pocked with abundant hydroxyl groups which can reacted with H 2 O to form exchangeable protons. Bench-scale to pilot-scale adsorption was carried out to assess Cs removal capacity and rate. ZTP showed a good adsorption performance for Cs + especially at trace concentration (500 ppb) and the removal rate in deionized water and seawater were 98.8 % and 83.9 %, respectively. Radioactive experiments were conducted to test the selective removal of 137 Cs + and the removal rates reached 98.3 %. Slurry-bed adsorption device was designed and used as the pilot-scale equipment. The removal rate was as high as 92.7 % after 12 cycles, indicated that ZTP is one of the promising adsorbents in industrial application. Pyridine adsorption IR spectra indicated that surface of ZTP was riddled with Brønsted and Lewis acid sites, and the protons at the Brønsted acid site exchanged with Cs + . This work will provide reference for the treatment of large-scale Cs-contaminated wastewater.
研究领域:
环境科学
·
放射化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 16
·9644-9654
·
IF 4.22
Ma Jiang,Fang Zhiwei,Yang Xiaoyong,Wang Bo,Luo Fen,Zhao Xiaoli,Wang Xiaofen,Yang Yushan
Ceramic matrix containing zirconolite, hollandite, and perovskite phases is proposed as a potential host for HLW immobilization. Hollandite phase principally immobilizes Cs, while perovskite phase mainly immobilizes Sr. In this study, hollandite–perovskite composite ceramics are considered as a specialized waste form for immobilizing the separated Cs and Sr from HLW streams and synthesized by a solid-state reaction method at 1300 °C for 5 h. The phase compositions of the synthesized composites were characterized by XRD and BSE. The XRD results indicated that the as-prepared ceramics are composed of tetragonal hollandite Ba 0.8 Cs 0.4 Al 2 Ti 6 O 16 , cubic perovskite SrTiO 3 , alongside a lesser amount of TiO 2 . The BSE—EDX results confirm that Cs partitions into the hollandite matrix, while Sr incorporates into perovskite host with homogenous distribution. In addition, aqueous durability testing was carried out using the MCC-1 static leach test method. The normalized release rates of Cs and Sr in HP-3 sample (i.e., 75 wt% Ba 0.8 Cs 0.4 Al 2 Ti 6 O 16 + 25 wt% SrTiO 3 ) were < 10 −2 g·m −2 ·d −1 after 42 days, exhibiting excellent chemical durability. These results indicate that the hollandite–perovskite ceramic matrix could be considered as a customized host matrix for immobilization of the separated Cs and Sr from HLW streams.
研究领域:
材料科学
·
核废料管理
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Yushan Yang,Xiaofen Wang,Shunzhong Luo,Xiaoyong Yang,Jiang Ma
[Cs x Ba y ][(Al 3+ ,Ti 3+ ) 2 y + x Ti 4+ 8-2 y - x ]O 16 (0.4 ≤ x , y ≤ 0.8) ceramics were synthesized to investigate the substitution effects of Ba 2+ for Cs + on the stability of hollandite-ceramic waste forms. It was found that the substitution of Ba 2+ for Cs + in the (Cs,Ba)-hollandite system does not cause substantial variation in the crystallographic phase and microstructure. The normalized release rates of Cs and Ba at 90 °C in deionized water were < 0.005 g m −2 d −1 after 28 days. These results indicate that hollandite ceramics are an ideal host for permanent radioactive caesium disposal.
研究领域:
材料科学
·
核废料管理
✓ 已验证
DOI
高影响因子
Nanoscale Advances
·
2023
·Vol. 5
·期 20
·5661-5670
·
IF 4.7
Tingyu Xue,Fang Liu,Bin Lu,Qingrong Dong,Bin Zhao,Tianqing Chen,Kun Zhang,Jianguo Li,Jiangfeng Du
Radioactive cesium (Cs) is a significant concern due to its role as a major byproduct of nuclear fission and its potential for radioactive contamination. Internal contamination with radioactive Cs is characterized by immoderate production of reactive oxygen species (ROS), resulting in severe radiation damage. Therefore, the development of therapeutic strategies should focus on enhancing the excretion of radioactive Cs and reducing radiation-induced oxidative damage. However, current therapeutic drugs like Prussian blue (PB) have limited efficacy in addressing these issues. In this study, we present Cu3[Fe(CN)6]2 (CuFe) nanoparticles, a Prussian blue analog (PBA), which can not only efficiently sequester Cs but also exhibit resistance against radiation damage. The results of the adsorption studies demonstrate that CuFe outperforms PB in terms of adsorption performance. Further mechanistic investigations indicate that the increased adsorption capacity of CuFe may be attributed to the presence of additional defects resulting from the [Fe(CN)6] missing linkers. Moreover, CuFe mimics the functions of catalase (CAT) and superoxide dismutase (SOD) by effectively eliminating O2˙− and H2O2 while scavenging ˙OH, thereby mitigating ROS induced by radiative Cs. Importantly, in vivo study confirms the efficient Cs decorporation capability of CuFe. The fecal cumulative excretion rate of CuFe reaches 69.5%, which is 1.45 times higher than that of PB (48.8%). These findings demonstrate that CuFe exhibits excellent Cs removal performance and ROS scavenging ability, making it an attractive candidate for the treatment of Cs contamination.
研究领域:
药理学
·
放射医学
·
纳米医学
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DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Tang Jun-Hao,Jia Shao-Qing,Liu Jia-Ting,Yang Lu,Sun Hai-Yan,Feng Mei-Ling,Huang Xiao-Ying
Highly selective capture of radiocesium is an urgent need for environmental radioactive contamination remediation and spent fuel disposal. Herein, a strategy is proposed for construction of “inorganic ion-imprinted adsorbents” with ion recognition-separation capabilities, and a metal sulfide Cs 2.33 Ga 2.33 Sn 1.67 S 8 ·H 2 O (FJSM-CGTS) with “imprinting effect” on Cs + is prepared. We show that the K + activation product of FJSM-CGTS, Cs 0.51 K 1.82 Ga 2.33 Sn 1.67 S 8 ·H 2 O (FJMS-KCGTS), can reach adsorption equilibrium for Cs + within 5 min, with a maximum adsorption capacity of 246.65 mg·g −1 . FJMS-KCGTS overcomes the hindrance of Cs + adsorption by competing ions and realizes highly selective capture of Cs + in complex environments. It shows successful cleanup for actual 137 Cs-liquid-wastes generated during industrial production with removal rates of over 99%. Ion-exchange column filled with FJMS-KCGTS can efficiently treat 540 mL Cs + -containing solutions (31.995 mg·L −1 ) and generates only 0.12 mL of solid waste, which enables waste solution volume reduction. Single-crystal structural analysis and density functional theory calculations are used to visualize the “ion-imprinting” process and confirm that the “imprinting effect” originates from the spatially confined effect of the framework. This work clearly reveals radiocesium capture mechanism and structure-function relationships that could inspire the development of efficient inorganic adsorbents for selective recognition and separation of key radionuclides.
研究领域:
环境科学
·
材料科学
·
核化学
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Sun Hai-Yan,Chen Zhi-Hua,Hu Bing,Tang Jun-Hao,Yang Lu,Guo Yan-Ling,Yao Yue-Xin,Feng Mei-Ling,Huang Xiao-Ying
Selective separation of 137 Cs is significant for the sustainable development of nuclear energy and environmental protection, due to its strong radioactivity and long half-life. However, selective capture of 137 Cs + from radioactive liquid waste is challenging due to strong coulomb interactions between the adsorbents and high-valency metal ions. Herein, we propose a strategy to resolve this issue and achieve specific Cs + ion recognition and separation by modulating the stacking modes of layered perovskites. We demonstrate that among niobate-based perovskites, A LaNb 2 O 7 ( A = Cs, H, K, and Li), HLaNb 2 O 7 shows an outstanding selectivity for Cs + even in the presence of a large amount of competing M n+ ions ( M n+ = K + , Ca 2+ , Mg 2+ , Sr 2+ , Eu 3+ , and Zr 4+ ) owing to its suitable void fraction and space shape, brought by the stacking mode of layers. The Cs + capture mechanism is directly elucidated at molecular level by single-crystal structural analyses and density functional theory calculations. This work not only provides key insights in the design and property optimization of perovskite-type materials for radiocesium separation, but also paves the way for the development of efficient inorganic materials for radionuclides remediation.
研究领域:
材料科学
·
环境科学
·
核能技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Na Yang,Xu Guo,Jing Yu,Qi Liu,Jingyuan Liu,Jiahui Zhu,Rongrong Chen,Jun Wang
The rational use of solar energy to achieve photothermal conversion is an attractive strategy to promote the efficient removal of radioactive Cs + and Sr 2+ from nuclear wastewater. Herein, a photothermal adsorbent of composite aerogel with three-dimensional porous structure is fabricated by integrating prussian blue analogues (PBAs) and straw biochar into the chitosan (CS) and waste leather scrap hydrolysate (WLSH) aerogel matrix (CS/WLSH/C/PBAs). The local heating effect generated by CS/WLSH/C/PBAs aerogel induce to generate steam, accelerating the enrichment of Cs + and Sr 2+ in the solution, which increase their interaction with the CS/WLSH/C/PBAs and improves their adsorption rates and capacities. Under simulated sunlight, the adsorption equilibrium times for Cs + and Sr 2+ by CS/WLSH/C/PBAs are shortened from 5 h in the dark condition to 2 h, with maximum adsorption capacities of 156.0 and 95.1 mg/g for Cs + and Sr 2+ , respectively. Meanwhile, the CS/WLSH/C/PBAs aerogel also exhibits excellent reusability. Notably, the Cs + and Sr 2+ still can be efficiently removed in simulated seawater. Encouragingly, the CS/WLSH/C/PBAs aerogel also exhibits excellent adsorption properties for dyes and oils. This work provides insights for the design of multifunctional and efficient composite adsorbents, and paving a promising way for enhancing the adsorption of Cs + and Sr 2+ through solar energy.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·Vol. 334
·期 7
·4977-4989
·
IF 1.6
Yang Man,Wang Yi,Gao Xin,Ma Chuanyi,Li Zhanguo,Lin Xiaoyan
In this study, a series of iron-based Prussian Blue Analogues (PBAs) were synthesised using 137 Cs as the model radioactive contaminant. The influence of various nitrogen-ligand metal species on the cesium adsorption performance was systematically examined through controlled experiments. Subsequently, an innovative composite hydrogel was engineered via a single-step polymerisation methodology, integrating guar gum (GG), borax, glycerol, and optimised PBA adsorbents. This approach capitalised on synergistic interactions between borate crosslinking, hydrogen bonding networks, and cesium-selective coordination sites, yielding a mechanically robust hydrogel with exceptional structural integrity and decontamination capabilities, while maintaining rapid manufacturing potential. The hydrogel exhibited unprecedented efficiency in removing cesium contaminants from heterogeneous surfaces, achieving removal efficiencies of 99.64% (glass), 99.50% (stainless steel), 99.62% (rubber), 99.27% (lacquered board), and 88.37% (cement), thereby demonstrating consistent performance across diverse substrate chemistries and surface topographies. Comprehensive mechanistic analysis revealed the dual functionality of the hydrogel coating: physical entrapment through viscoelastic adhesion and chemoselective ion capture via PBA coordination. These findings provide critical insights into surface-bound radionuclide remediation strategies, positioning this technology as a transformative solution for practical radioactive decommissioning operations and environmental remediation initiatives. Graphical abstract
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 9
·3967-3976
·
IF 9.931
Yu-Jie Gao,Mei-Ling Feng,Bo Zhang,Zhao-Feng Wu,Ying Song,Xiao-Ying Huang
It is of vital importance to capture 137Cs+ and 90Sr2+ from solutions for radionuclide remediation due to their hazardous nature and long half-life. Although metal organic framework (MOF) materials have been greatly developed, the studies of their application in the capture of radioactive cations remain rare. Especially, the capture mechanism has not been clarified. Here, we present a new In-MOF material with the potential for remediation of radioactive Cs+ and Sr2+ ions by ion exchange, namely, [Me2NH2][In(TDC)2]·1.5DMA·1.5H2O (FJSM-InMOF; H2TDC = 2,5-thiophenedicarboxylic acid and DMA = N,N′-dimethylacetamide). It possesses an anionic framework of [In(TDC)2]nn− charge balanced by dimethylammonium cations. It could be easily synthesized via a one-pot solvothermal route. Remarkably, it showed excellent β and α radiation-resistances, high exchange capacities (qCsm = 198.63 mg g−1; qSrm = 43.83 mg g−1), impressive selectivity (KCsd = 7.50 × 104 mL g−1; KSrd = 9.49 × 105 mL g−1), high ion-exchange efficiency (RSr = 99.89%; RCs = 99.63%) and the ability of convenient elution with low cost. In particular, the ion exchange mechanism was illuminated by an unprecedented observation of the single-crystal to single-crystal structural transformation in the Cs+-exchange process. This work paves the way to develop highly efficient and environmentally friendly MOFs for the selective capture of radionuclides.
研究领域:
环境科学
·
材料科学
·
核化学与放射化学
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产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2016
·
IF 9.407
Huajun Yang,Min Luo,Li Luo,Hongxiang Wang,Dandan Hu,Jian Lin,Xiang Wang,Yanlong Wang,Shuao Wang,Xianhui Bu,Pingyun Feng,Tao Wu
The safe use of nuclear energy requires the development of advanced adsorbent technology to address environment damage from nuclear waste or accidental release of radionuclides. Recently developed amine-directed chalcogenide frameworks have intrinsic advantages as ion-exchange materials to capture radionuclides, because their exceptionally negative framework charge can lead to high cation-uptake capacity and their 3-D multidimensional intersecting channel promotes rapid ion diffusion and offer a unique kinetic advantage. Prior to this work, however, such advantages could not be realized because organic cations in the as-synthesized materials are sluggish during ion exchange. Here we report an ingenious approach on the activation of amine-directed zeolitic chalcogenides through a stepwise ion-exchange strategy and their use in cesium adsorption. The activated porous chalcogenide exhibits highly enhanced cesium uptake compared to the pristine form and is comparable to the best metal chalcogenide sorbents so far. Further ion-exchange experiments in the presence of competing ions confirm the high selectivity for cesium ions. Excellent removal performance has also been observed in real water samples, highlighting the importance of stepwise ion exchange strategy to activate amine-directed chalcogenide framework for 137Cs+ removal.
研究领域:
核科学
·
材料科学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Mai Yuzhen,Chen Jie,Jiang Fuliang,Zhang Junfeng,Xie Yupeng
Radioactive cesium represents a substantial risk to both human health and environmental safety due to its persistent and hazardous nature. Simultaneously, large quantities of coal fly ash (CFA) are produced annually without sufficient resource utilization. In this study, a combination of microwave sintering technology and CFA was utilized to fabricate pollucite [CsAlSi 2 O 6 ] ceramic designed to immobilize radioactive cesium. The CsAlSi 2 O 6 ceramic derive from CFA with > 98% cesium retention was achieved via microwave sintering at 850 °C for 30 min, which was ~ 300 °C lower and ~ 11% cesium retention rate higher that those of reported Cs-bearing hollandite. The influence of Cs 2 CO 3 content and sintering temperature on the phase evolution of the sintered samples were systematically examined. The chemical durability of the sintered forms was further assessed. The results indicated that the Cs(I) elements were uniformly distributed within the sintered matrix. Furthermore, the maximum solid solubility of Cs 2 CO 3 in the sintered forms was found to be 39 wt% at 850 °C. Notably, the solidified samples exhibited exceptional chemical durability, with normalized leaching rate of Cs + ions (LR Cs ) maintaining consistently low (~ 1.0 × 10 –6 g m −2 d −1 ) after 42 days. This study provides a valuable reference for the potential resource utilization of CFA in the stable solidification of radioactive cesium via microwave sintering, offering a promising strategy for future application.
研究领域:
核废物管理
·
材料科学
·
环境修复
·
微波处理技术
·
陶瓷材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Chi Ma,Wenlei Fan,Wei Qin,Yafei Guo,Lichun Ma,Nelson Belzile,Tianlong Deng
Although efficient removal of Cs from wastewater is of great importance because of the nuclear energy sustainable development and public health, removing cesium is challenging for the high concentrations of sodium and potassium ions coexist. In this work, we synthesized the first novel bismuth-doped layered tin sulfide (KBS) and applied it to the efficient green adsorption of liquid cesium resources. KBS could reach the adsorption equilibrium for Cs + within only 2 min with a theoretical adsorption capacity of 425.55 mg/g. Furthermore, the adsorption performance remained reliable after 10 cycles of use. The structure and properties of KBS were explained at the molecular level by DFT calculations, and the calculated results were in sound agreement with the experimental data. Meanwhile, in this study, the material was reinforced and shaped by the electrostatic interaction of Zein and sodium alginate hydrogel, and finally, Zein@SA/KBS spherical composite adsorbent was obtained. The problem of the difficult recovery of adsorbent and the secondary contamination was solved. The adsorption performance of Zein@SA/KBS on Cs + was better than most composite adsorbents and showed reliable stability. Therefore, the new microspherical adsorbent (Zein@SA/KBS) has great potential for industrial application in removing radioactive cesium from wastewater.
研究领域:
环境科学
·
材料科学
·
核工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）