JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2022
·Vol. 331
·期 4
·1645-1658
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IF 1.754
Zhang Rui,Hou Wei,Wang Hongqiang,Hu Eming,Lei Zhiwu,Hu Fang,Zhou Wen,Wang Qingliang
The oxidation efficiency and leaching rate of ozone micro-nano bubbles (OMNBs) on UO 2 and sandstone uranium ore were explored and evaluated through a batch oxidation experiment of sandstone uranium ore and a continuous flow oxidation experiment of UO 2 . OMNBs can accelerate the rate of oxidative leaching. Oxidation mainly relies on ozone oxidation. Oxidation of sandstone uranium ore by OMNBs was feasible, and OMNBs may solve current problems encountered in production practice. The continuous flow experiment verified the feasibility of the large-scale experiment and provided a new method for CO 2 + O 2 ISL of uranium under normal pressure in the future.
研究领域:
化学工程
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环境科学
·
矿业工程
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 328
·期 3
·991-1000
·
IF 1.371
Cai Jialing,Feng Jiahui,Li Jiahui,Feng Yu,Liu Fuping,He Feifang,Yu Haoqi,Zhang Zimin,Hu Yanqin,Hua Rong
This paper characterized the microstructure and physical properties of the scale from a uranium mine in Xinjiang by SEM, XRD and FT-IR. Based on the orthogonal experiment design, the formula of HClO 4 : EDTA: (NaF + HNO 3 ) = 4:1:5 is selected. The results show that the scale remover has the functions of dissolution, lattice damage and dispersion. The selected collaborative scale removal method can effectively remove the scale in the uranium mining process and has certain application value.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2022
·
IF 6.556
Heng Yan,Xuemei Liu,Fan Zhang,Kaiqiang Ma,Xuepeng Shao,Fengcheng Wu,Jun Han,Wenting Bu,Chuting Yang,Liangbin Li,Sheng Hu
U, Sr, Pb, Nd, and Hf isotope ratios can provide basic and important information of nuclear materials. We established a simple and efficient column chemistry method using nano-NaBiO 3, as both oxidizer and adsorbent, to completely separate Ce from rare earth elements (REEs). This new method exhibited a high decontamination (Ce/Nd < 10 −5 ) ability and was easy to conducted, thereby providing clear advantages compared to traditional liquid–liquid and solid phase micro-extraction techniques. Additionally, a rapid four-column separation procedure, based on Sr, TUR, Ln resins and nano-NaBiO 3 , was developed to isolate U, Sr, Pb, Nd, and Hf in ore samples. The entire procedure could be completed in 4–5 hrs. The robustness of the proposed method was demonstrated by analyzing the 235 U/ 238 U, 87 Sr/ 86 Sr, 206 Pb/ 204 Pb, 207 Pb/ 204 Pb, 208 Pb/ 204 Pb, 142 Nd/ 144 Nd, 143 Nd/ 144 Nd, and 176 Hf/ 177 Hf isotopic ratios of two certified reference materials (CRMs). The analytical results obtained using this method showed good agreement with previously published data. The feasibility of this method was extended to the determination of isotope ratios in uranium ores . The results obtained from the two samples with different regions indicated that they have different isotopic ratios information. These findings indicate the potential for the use of this new method in nuclear forensic science.
研究领域:
化学
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核科学
·
地球化学
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产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Zhengxing Jiang,Hua Li,Rui Ai,Yuequan Deng,Yi He
Artificial enzyme mimics are more stable and cost-effective than bioenzymes, but they usually lack substrate recognition function. Here, we report that uranyl (UO22+) features efficient artificial peroxidase activity with a high specificity and can catalyze the oxidation of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium (ABTS) by H2O2 to yield green ABTS radical (ABTS•+), whereas other common substrates such as 3,3′-diaminobenzidine (DAB), 3,3′,5,5′-tetramethylbenzidine (TMB), o-phenylenediamine (OPD), and dopamine (DA) are not oxidized. The high specificity of UO22+ peroxidase mimic is ascribed to the electrostatic-driven coordination interaction between ABTS anion and UO22+ cation, and the orthorhombic metastudtite from the reaction between H2O2 and UO22+ rather than reactive radicals is identified as the key intermediate, which accounts for ABTS oxidation. On the basis of the UO22+ peroxidase mimic, a facile, low-cost, and reliable colorimetric assay is fabricated. The resulting colorimetric assay displays a good analytical performance for UO22+ detection in a linear range of 10–100 μM, along with a limit of detection of 0.5 μM. Further, the present colorimetric assay has a good selectivity toward UO22+ over common metal ions, which is applied for determination of UO22+ in natural water samples with satisfactory recovery results.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yun-Han Mao,Qun-Yan Wu,Yu-Qian Zhong,Jian-Hui Lan,Hong-Bin Qi,Wei Jin,Zhi-Wei Huang,Kong-Qiu Hu,Wei-Qun Shi,Lei Mei
To mitigate ecological and public health threats of radionuclides, functional metal–organic frameworks (MOFs) can serve as ideal platforms for separation of radionuclides, but bioderived MOFs with low-cost, environmentally friendly organic blocks are still desiring. In this work, a new kind of bioderived ellagic acid (EA)-based thorium-organic framework materials is proposed for the first time. It is demonstrated that Th-EA with π–π stacking interactions for supporting the robust framework possesses excellent structural stability in aqueous solutions at pH 2–11 and achieves a maximum adsorption capacity of 229.1 mg·g −1 at pH 5 for uranyl ion through an ion-exchange process. Notably, such a bioderived material can serve a photocatalyst to produce a large amount of hydrogen peroxide (H 2 O 2 ) (≈170.2 µmol·g −1 ·h −1 ) from water and oxygen under visible light irradiation, which is able to greatly improve the uranyl removal rate to 96.2% by transforming adsorbed uranyl into the insoluble studtite phase. Furthermore, Th-EA can also serve as both excellent adsorbents and photocatalysts to achieve high-efficiency and selective removal of uranium from radio-contaminated tailing groundwater. This work demonstrates the feasibility of bioderived MOF materials for enhanced nuclide separation and will inspire the development of more low-cost, environment-friendly functional materials.
研究领域:
环境科学
·
材料化学
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放射化学
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光催化
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核废料管理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）