JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2015
·Vol. 30
·期 6
·1179-1183
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IF 0.399
Zhang Kuibao,Wen Guanjun,Yin Dan,Zhang Haibin
TiO 2 was employed as the waste form for disposal of simulated nuclide Sr. Preparation of Sr bearing rutile was explored under different sintering temperatures and Sr contents. The optimal treatment temperature was confirmed as 1 300 °C for the incorporation of SrO in rutile TiO 2 . Perovskite type SrTiO 3 was prepared as the resultant product. The limited containment capacity of SrO in rutile was speculated to be 56.5wt%. As the SrO content increases, the as-synthesized sample exhibits more porosity because SrTiO 3 phase demonstrates higher density than rutile and SrO. The 28 day normalized leaching rate (LRi) of Sr and Ti will decrease congruously as the SrO incorporation increases. The LR Sr value is lower than 0.1 g·m -2 ·d -1 , which is about 3 orders of magnitude higher than the LR Ti value.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 48
·19299-19310
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IF 4.177
Caixia Li,Lei Wu,Lixi Chen,Xiangyang Yuan,Yimin Cai,Wen Feng,Ning Liu,Yi Ren,Arijit Sengupta,Mallekav S. Murali,Prasanta K. Mohapatra,Guohong Tao,Huaqiang Zeng,Songdong Ding,Lihua Yuan
Actinide partitioning is considered as one of the most challenging issues in nuclear waste remediation. Herein, we unravel a novel extraction mode pertinent to the competitive host–guest interactions for highly efficient actinide extraction. The host–guest recognition event involves binding of a room temperature ionic liquid (RTIL), 1-n-octyl-3 methylimidazolium bis(trifluoromethane)sulfonamide (C8mimNTf2), as both the guest and the solvent by the hosts pillar[5]arene-based diglycolamides (P5DGAs) and the subsequent displacement of the guest by a metal ion. This two-step process suggests a unique competitive ion-mediated displacement mechanism for the metal ion partitioning in the extraction process. The supramolecular extraction system is evaluated for its extraction abilities towards actinide ions such as UO22+, PuO22+, Pu4+, Am3+, and fission product elements such as Eu3+, Sr2+, Cs+. The results demonstrate the exceedingly high distribution ratios and favorable separation of Am3+ and Pu4+ in nitric acid media. All the three P5DGAs form 1 : 1 complexes with Am3+. Time resolved laser fluorescence spectroscopic (TRLFS) studies reveal a strong complexation involving no inner-sphere water molecules in the Eu3+–P5DGA complexes when C8mimNTf2 is used as the diluent. With high efficiency in the extraction of actinides and a quantitative back extraction outcome, the RTIL-based solvent systems containing pillar[5]arene-DGA ligands developed in this work hold potential as promising candidates for nuclear waste remediation in a more sustainable fashion.
研究领域:
化学
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环境科学
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核化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Juan Tong,Yuankun Liu,Lipeng Han,Binliang Li,Beijia Chang,Xiaoqing Gao,Tonghuan Liu,Junqiang Yang,Keliang Shi,Xiaolin Hou
Due to the complex type of coexisting ions, remarkable acidity, and high radioactivity, efficient and sustainable methods for the removal of pertechnetate (99TcO4–) from acidic nuclear waste streams have attracted much attention. Herein, a porous highly polymeric zwitterionic resin (PDVBVIM1.5SO3) was synthesized by installing sulfobetaine zwitterionic units in the polymeric imidazole resin to achieve the purpose of balancing the hydrophilicity and hydrophobicity of the resin structure and improving the reaction kinetics and ion selectivity of the resin at the same time for perrhenate (ReO4–)/99TcO4– removal from acidic solutions. The results demonstrate that PDVBVIM1.5SO3 exhibits fast adsorption kinetics, superior adsorption capacity, and excellent selectivity in the presence of a variety of 1000-fold competing anions. The rapid elimination of ReO4– can be achieved even in 1 mol L–1 HNO3. Importantly, when subject to acid soaking, calcination procedure, and high doses of ionizing radiation, PDVBVIM1.5SO3 maintained its structural integrity and outstanding performance. Additionally, PDVBVIM1.5SO3 displayed outstanding adsorption efficiency toward a simulated Hanford low-activity waste stream with ReO4–. This work demonstrates that achieving a balance between hydrophobicity and hydrophilicity in an exchange resin is of great significance for enhancing the selection and removal of TcO4–/ReO4–, and PDVBVIM1.5SO3 resin could be an excellent acid nuclear waste-adsorbing material candidate.
研究领域:
化学工程
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环境科学
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核科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Wanjun Mu,Qianghong Yu,Xingliang Li,Hongyuan Wei,Yuan Jian
Efficient, irreversible capture of radioactive strontium and cesium from aqueous media remains a serious task for nuclear waste disposal and environmental protection. To address this task, an effective sorbent based on magnetic composites coated with the synthetic porous exchanger WO 3 was prepared by a facile method and characterized in detail. XRD analysis indicated that the WO 3 coating did not change the phase of the Fe 3 O 4 core, and TEM imaging further showed that Fe 3 O 4 @WO 3 particles were successfully obtained with nearly uniform size. A batch of experiments was carried out to investigate the efficiency of Fe 3 O 4 @WO 3 in removing Sr 2+ and Cs + under various environmental conditions. Experimental results showed that Fe 3 O 4 @WO 3 has higher adsorption capacity for Sr 2+ and Cs + in acidic aqueous solution in comparison to the previous literature. The theoretical maximum adsorption capacities of Fe 3 O 4 @WO 3 for Sr 2+ and Cs + are 44.178 and 53.175 mg g −1 , respectively, as modeled by Langmuir isotherms. The adsorption process is fast and reaches equilibrium within 3 h, which is attributed to the good dispersion of WO 3 on the surface of Fe 3 O 4 and provided much more adsorption sites. Other than Ca 2+ and K + , coexisting electrolyte ions had no significant competition effects on the removal of Sr 2+ and Cs + by Fe 3 O 4 @WO 3 . In addition, the Fe 3 O 4 @WO 3 adsorbent remains stable in acidic solutions and may be repeatedly used 5 times without any noticeable loss in adsorption capacity; the used adsorbents can be easily separated from the aqueous solution using a magnetic method. The advantages of being nontoxic, highly stable, and resistant to acid, as well as having high adsorption capacity for Sr 2+ and Cs + , indicate that Fe 3 O 4 @WO 3 has significant potential for real radioactive wastewater treatment.
研究领域:
化学工程
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环境科学
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核能技术
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 329
·期 1
·475-484
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IF 1.371
Jiao Caishan,Hou Chenxi,Zhang Meng,Chao Nan,Gao Yang,Li Yaorui
Solidification of radioactive waste containing strontium is a significant procedure in the nuclear waste treatment and disposal. In this research, structure evolution and leaching stability characteristics of aluminum phosphate binder matrix doped with different SrO contents are characterized. The results indicate that the change of SrO content leads to phase transformation of solidified samples. The significance of this research is that aluminum phosphate binder solidified system presents a high load capacity for SrO (SrO content of 50 wt%) as well as good leaching stability (normalized leaching rate 1.01 × 10 −4 g m −2 d −1 after 42 days) for solidified sample.
研究领域:
材料科学
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环境科学
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核工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Guilin Wei,Xiaoyan Shu,Mingfen Wen,Yuexiang Lu,Tao Duan,Shunzhang Chen,Hexi Tang,Jing Chen,Faqin Dong,Yi Xie,Yang He,Xirui Lu
Nuclear waste generated from the nuclear industry should be safely treated because of its harmful effects on the environment and humans. In this study, the mechanism of the as-prepared Gd 2 Zr 2 O 7 for nuclear waste immobilization was investigated as an example in the simulation of waste immobilization under spark plasma sintering (SPS) conditions. The solid solubility limit of the waste in the sintered matrices was 45 mol% at 1725 °C and 1800 °C. The phase transformation from fluorite to pyrochlore could be detected owing to the increase in the ionic radius ratio when the waste was immobilized in the matrix structure. A high sintering temperature promotes transformation by increasing the orderliness of the matrix structure and destroying the crystalline structures to form an amorphous structure, results in a decrease in structural orderliness. Moreover, the leaching rates of Nd, at approximately 3.5 × 10 −8 g·m −2 ·d −1 at 42 d, demonstrated high chemical stability in the matrices doping with 45 mol% simulated nuclear waste. A mechanism is proposed in this study for treating radioactive waste using Gd 2 Zr 2 O 7 ceramic under SPS conditions.
研究领域:
材料科学
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环境科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 34
·2401775
·
IF 18.5
Qingyun Zhang,Feng Luo
Fabricating efficient adsorbent for the removal of nuclear waste is of vital importance from the viewpoint of both environmental protection and resource reclamation. Published research has yielded several adsorbents; however, these reported materials do not possess a high removal performance for different types of nuclear waste. In this work, it is shown for the first time the synthesis of a boron-functionalized covalent organic framework (COF) and its ionic borate counterpart. These boron-functionalized COFs are found to show large potential for handling various nuclear wastes, including alkaline nuclear wastewater, uranium-containing nuclear wastewater, and I 2 nuclear off-gas. The developed COF has a record NaOH uptake of 2 g g −1 , an ultrahigh uranium extraction ability of 1.77 g g −1 , and an ultrahigh I 2 capture capacity of 9.4 g g −1 . Moreover, the materials have low cost and are reusable, and thus have significant potential for handling nuclear wastes.
研究领域:
环境科学
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材料科学
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核能工程
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Sheng-Zhe Zhao,Rui-Dong Shi,Guo-Tao Xiang,Yong-Da Hu,Jin-Ju Chen
The system of photocatalytic fuel cells (PFC) emerges as a significant innovation within the realm of energy conversion technologies, harnessing the potential of organic waste to produce electrical energy. In this study, we propose a novel approach for simultaneous electricity production and pollutant removal using a PFC system, which consists of Bi 2 O 3 /TiO 2 heterojunction nanotubes modified by g-C 3 N 4 as photoanode materials. The g-C 3 N 4 /Bi 2 O 3 /TiO 2 (CBT) heterostructure possesses a large specific surface area, improved visible light absorption, and enhanced photogenerated carrier separation capability. The morphology, composition, crystal structure, and optical properties of the synthesized CTB were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and UV–Vis diffuse reflectance spectroscopy (DRS). Using tetracycline hydrochloride as the target pollutant, the photocatalytic degradation performance of the CBT heterostructure is 3.2 times higher than that of pure TiO 2 nanotubes. Furthermore, the PFC system consisting of CBT as photoanode has a significant improvement in pollutant degradation and current output when compared with the PFC with pure TiO 2 . This study presents a cost-effective approach for organic waste treatment and simultaneous electricity production.
研究领域:
环境科学
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能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 12
·5363-5370
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IF 3.591
Yalin Huang,Wei Li,Yuwei Xu,Mu Ding,Jie Ding,Yun Zhang,Yuanhua Wang,Shanyong Chen,Yongdong Jin,Chuanqin Xia
The efficient capture of radioiodine from the waste of nuclear industries is a growing priority for the safe development of nuclear energy. However, because the iodine adsorption rate of previously reported adsorbents is very slow, they are inadequate for use in an actual emergency such as radioiodine leakage in a nuclear accident. Herein, a nitrogen-rich covalent triazine–piperazine-based porous polymer (n-CTP) was successfully synthesized via a mild one-step solvothermal route. The large pore size and abundant N-heterocyclic groups (with a nitrogen content as high as 39.69%) of n-CTP are beneficial for the diffusion and adsorption of I2, and they have the ability to decrease the adsorption time. The ability of n-CTP to adsorb iodine vapor was examined, and the results show that n-CTP possesses a faster adsorption rate (1.58 g g−1 h−1) than most iodine-capturing covalent organic polymers (COPs), excellent iodine uptake capacity (4.19 g g−1), satisfactory selectivity, and can be reused for at least three cycles without a significant loss of iodine uptake. FT-IR and Raman analyses revealed that the mechanism of iodine capture is attributed to the charge transfer interactions between n-CTP and the guest iodine. In addition, n-CTP also exhibits high iodine capture capacity (2.88 g g−1) and fast adsorption rate in iodine solutions. Thus, n-CTP has the potential to be applied to the rapid removal and enrichment of radioiodine in spent fuel reprocessing and has the ability to prevent environmental contamination in the case of nuclear accidents.
研究领域:
材料科学
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环境科学
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核能技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Dingyang Chen,Zhaoli Liu,Shuying Li,Xiaofei Jing,Yuyang Tian,Wei Hu,Fengchao Cui,Rui Zhao,Guangshan Zhu
Developing cationic adsorbents for efficient radioactive pertechnetate ( 99 TcO 4 − ) removal from water is of great significance in both nuclear fuel management and nuclear-related environmental treatment fields. However, tremendous efforts should be taken to improve the comprehensive performance of the adsorbent materials. Herein, novel cationic electrospun nanofibers were synthesized via the blending electrospinning from the branched polyethylenimine based solution and the following quaternization reaction by benzyl bromide. Consequently, abundant specific anion traps with hydrophobic microenvironment were constructed on the fibers. The obtained fiber adsorbents were systematically investigated to remove perrhenate (ReO 4 − ) ions (the nonradioactive surrogate for TcO 4 − ), which exhibit satisfying adsorption performance in several aspects: high adsorption capacity (943 mg g −1 ), fast kinetics (30 min), good removal depth (distribution coefficient = 1.1 × 10 6 mL g −1 ), large dynamic column adsorption volume (1540 bed volume), and excellent ReO 4 − capture from solution with high ionic strength or acidity/alkalinity. The adsorption performance surpassed all macroscopic shapeable adsorbents and many powdery advanced porous materials, owing to their abundant adsorption sites, tailored anion traps and macroscopic fibrous structures. Overall, this work gives a useful insight into designing novel adsorbents for effective TcO 4 − /ReO 4 − capture.
研究领域:
材料科学
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环境科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
·
IF 13.6
Yang Liu,Feng-Qi Shi,Xin Hao,Meng-Yu Li,Lin Cheng,Cheng Wang,Kai-Yao Wang
Efficient adsorption of radioactive 137 Cs + and 60 Co 2+ and their decay products 137 Ba 2+ and 60 Ni 2+ bears significance for hazard elimination in case of nuclear emergency, which relies on the adsorption rate enhancement that takes advantages of compositional and structural optimization. Herein, we report a zinc-doped selenidostannate constructed from T2-supertetrahedral clusters, namely K 3.4 (CH 3 NH 3 ) 0.45 (NH 4 ) 0.15 Zn 2 Sn 3 Se 10 ·3.4 H 2 O ( ZnSnSe‐1K ). The soft Se and micro-porosity synergistically endow this material with a binding affinity to Cs + , Ba 2+ , Co 2+ , and Ni 2+ ions and ultrafast kinetics with R > 97.6% in 2–60 min. In particular, ZnSnSe‐1K can remove 99.34% of Cs + in 2 min ( K d Cs > 1.5 × 10 5 mL g −1 ), contributing to a record rate constant k 2 of 9.240 g mg −1 min −1 that surpasses all metal chalcogenide adsorbents. ZnSnSe‐1K exhibits good acid/base tolerance (pH = 0–12), and the adsorption capacities at neutral are 253.61 ± 9.15, 108.94 ± 25.32, 45.76 ± 14.19 and 38.49 ± 2.99 mg g −1 for Cs + , Ba 2+ , Co 2+ , and Ni 2+ , respectively. The adsorption performances resist well co-existing cations and anions, and the removal rates can keep above or close to 90% even in sea water. ZnSnSe‐1K is employed in continuous column and membrane filtration, both of which shows excellent elimination efficiency ( R > 99%) for mixed Cs + , Ba 2+ , Co 2+ , and Ni 2+ . Especially, the membrane with an ultrathin (70 µm) ZnSnSe‐1K layer can remove 97–100% Cs + in suction filtration with a short contact time of 0.33 s. Combined with the simple synthesis, facile elution and great irradiation resistance, ZnSnSe‐1K emerges as a selenide adsorbent candidate for use in environmental remediation especially that involving nuclear waste disposal .
研究领域:
材料科学
·
环境科学
·
放射性废物管理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hanqin Weng,Peng Zhang,Zifang Guo,Geng Chen,Wanglai Shen,Jialiang Chen,Xing Zhao,Mingzhang Lin
Radioactive Tc-99 released by nuclear accidents threatens the environment and human health due to its long half-life and strong transportability. A combined strategy synergizing topological construction and chemical modification was proposed for the synthesis of high-performance adsorbents for Re as an analogue to Tc. On the one hand, hierarchically mesoporous SiO2 with a fibrous structure (F-SiO2), a peculiar topology integrating wrinkled open mesopores around 12 nm and on-wall mesopores around 3 nm, was adopted as the substrate of adsorbents. The larger mesopores can act as the superhighway for mass transfer, while the abundant smaller mesopores provide numerous adsorption sites. On the other hand, a series of dicationic pyridine (DCP) derivative groups (−Py+CnH2nN+Me3) were designed to functionalize F-SiO2 for improving the adsorption performance toward ReO4– anions, the dominating form of Re in aqueous solution. Density functional theory (DFT) calculation combined with batch adsorption experiments revealed that the ReO4– adsorption on −Py+C5H10N+Me3 was the most favorable when the length of the spacer between the two positively charged N atoms ranged from 2 to 7 carbons (n = 2–7). However, −Py+C5H10N+Me3 exhibited a much slower adsorption rate than −Py+C2H4N+Me3. The stronger interaction between ReO4– and −Py+C5H10N+Me3 suppresses the adsorbate diffusion. The two positive charges of −Py+C5H10N+Me3 may be perpendicularly distributed, sterically hindering ReO4– transport in smaller mesopores. The longer and flexible carbon chains may be aggregated to form the hydrophobic region, repulsing the hydrated ReO4– anions. Therefore, the efficient and ultrafast Re adsorption was achieved by synergizing the unique topology of F-SiO2 and functionalization by −Py+C2H4N+Me3 with a shorter spacer and weaker affinity ReO4–. The detailed investigation demonstrated that −Py+C2H4N+Me3 possessed exothermic adsorption nature, adequate radiation-resistance, and excellent reusability. Meanwhile, −Py+C5H10N+Me3 exhibited stronger salinity tolerance and higher selectivity. The DCP groups are promising in decontamination of radioactive Tc, as they can meet specific requirements by manipulating the length of spacers.
研究领域:
环境科学
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材料科学
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放射化学
✓ 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）