SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhuoya Hao,Jiacheng Zhang,Qin Peng,Xuefeng Tian,Jun Zhang,Jiayi Ai,Qiqi Jia,Yihui Yuan,Ning Wang
The increasing global reliance on nuclear energy highlights the critical need for uranium recovery from nuclear wastewater. However, due to the harsh environment of concentrated acid and nuclear radiation, the development of new adsorbent for uranium recovery from nuclear wastewater is highly needed. The bacterial spore has been reported to exhibit high tolerance to these harsh environments and contain functional components with reliable uranium binding ability, while there is still no report on the use of bacterial spore for uranium recovery from nuclear wastewater. Herein, the potential of the bacterial spore for being used in uranium recovery was analyzed for the first time. The result shows that the bacterial spore realizes a high uranium adsorption capacity of 245 mg g −1 in uranium-containing aqueous environment. With a low dosage of 0.1 g L −1 , the bacterial spore achieves a high uranium removal performance of 99.03 % in simulated nuclear wastewater. Additionally, when the concentration of HNO 3 reached 12 M, the adsorption capacity can still reach 156 mg g −1 after 24 h of treatment, proving its high tolerance to concentrated acid. Moreover, after being irradiated by γ-ray with the radiation dosage of 500 kGy, the bacterial spore retains 95.94 % of the uranium adsorption capacity, indicating its high resistance to nuclear radiation. These findings indicate that the bacterial spore would be a highly potential adsorbent for the recovery of uranium from nuclear wastewater with concentrated acid and nuclear radiation.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2024
·
IF 5.1
Jiading Wang,Shaoyun Guo,Xianlong Zhang
High-energy radiation could accelerate the deterioration of polymer properties, greatly increase the risk of equipment failure, and reduce the polymer’s service life. Inhibition of macromolecular chemical changes in polymers is the core design concept for conventional radiation resistance. Herein, we report a novel strategy that turns the radiation reaction into a repair effect for the self-reconnection of broken chains, thereby improving the radiation resistance of polyurethane (PU) concretely; the polybutadiene (PB) segments are evenly introduced into the PU with poly(propylene glycol) (PG) to prepare the PU containing PB and PG segments (PBG-PU). During irradiation, the radical addition coupling reactions of PB segments in PBG-PU allow the broken molecular chain of PBG-PU to be reconnected, thus continually repairing the radiation damage on PBG-PU. Therefore, the PBG-PU elastomers still maintain about 70% strength with minimal alterations in creep properties and recovery rates after 300 KGy radiation, while the ordinary PU elastomers have completely lost their original properties. The combination of the self-reconnection strategy and the modification method of the hard segment can even boost radiation resistance of PU to more than three times, showing excellent radiation stability. The self-reconnection strategy can also be used to increase the stability of the ultrastructure in material during high-dose gamma ray irradiation, showing great adjustability. This novel strategy demonstrates enormous potential in achieving the long-term application of polymers in nuclear industry, space mission, and radiation medicine fields.
研究领域:
材料科学
·
辐射生物学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Hao He,Qiang Liu,Shui-Dong Zhang,Hong-Bing Chen
In this study, polyimide (PI)/carbon fiber (CF) aerogel was fabricated via a freeze-drying method. The introduction of CF endows PI aerogels with good dimensional stability in the thermal imidization process. The resulting aerogel possesses excellent mechanical property (as high as 58.45 MPa) and good hydrophobic property (contact angle above 120°). The PI/CF aerogel also has very good radiation resistance, with a compressive modulus of 50.45 MPa even after 10 MGy irradiation, which is 86.53% of the initial modulus. These characteristics make the PI/CF aerogel very suitable for applications in radiation environment. Subsequently, a carbon aerogel with high temperature resistance and good mechanical properties was obtained by carbonization of the PI/CF aerogel. Its comprehensive property is comparable to traditional porous carbon-bonded carbon fiber composites.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2018
·
IF 14.357
Mei-Ling Feng,Debajit Sarma,Yu-Jie Gao,Xing-Hui Qi,Wei-An Li,Xiao-Ying Huang,Mercouri G. Kanatzidis
Unconventional ion exchangers can achieve efficient removal of [UO2]2+, Cs+, and Sr2+ ions from complex aqueous solutions and are of great interest for environmental remediation. We report two new gallium thioantimonates, [Me2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-1) and [Et2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-2), which present excellent ion exchange properties for [UO2]2+, Cs+, and Sr2+ ions. They exhibit high ion exchange capacities for [UO2]2+, Cs+, and Sr2+ ions (qmU = 196 mg/g, qmCs = 164 mg/g, and qmSr = 80 mg/g for FJSM-GAS-1, qmU = 144 mg/g for FJSM-GAS-2) and short equilibrium times for [UO2]2+ ion exchange (5 min for FJSM-GAS-1 and 15 min for FJSM-GAS-2, respectively). Both compounds display active ion exchange with [UO2]2+ in the pH range of 2.9–10.5. Moreover, the sulfide compounds could maintain high distribution coefficients KdU even in the presence of excess Na+, Ca2+, and HCO3–. The distribution coefficient KdU of 6.06 × 106 mL/g exhibited by FJSM-GAS-1 is the highest among the reported U adsorbents. The [UO2]2+-laden products can be recycled by conveniently eluting the uranium with a low-cost method. These advantages combined with facile synthesis, as well as β and γ radiation resistance, make FJSM-GAS-1 and FJSM-GAS-2 promising for selective separations in nuclear waste remediation.
研究领域:
环境科学
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材料科学
·
核化学
✓ 已验证
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2021
·
IF 5.03
Limin Jiao,Yi Wang,Zhihao Wu,Hang Shen,Hanqin Weng,Hongbing Chen,Wei Huang,Mozhen Wang,Xuewu Ge,Mingzhang Lin
Improving the radiation resistance of epoxy resin (EP) is pivotal for the reliability of equipment and the safety of facilities in the nuclear industry. Hexagonal boron nitride ( h -BN) is attractive in the preparation of radiation-resistant materials due to its good radiation stability and neutron shielding capability. In this work, h -BN/EP composites with enhanced radiation resistance were fabricated by solution blending. The tensile strength and thermal properties of the composites after γ-ray and neutron irradiation were investigated. The results showed that the addition of h -BN improved the mechanical property and the glassy transition temperature of the resin. The presence of low-level h -BN was favorable to enhance the radiation resistance of EP. As for composites with the 0.05% mass percentage of h -BN, the absorbed dose required to decrease relative tensile strength by 50% was about 300 kGy, which was higher than that of neat EP. The intrinsic mechanism of radiation resistance was attributed to the oxygen barrier effect as investigated by XPS and EPR. Then, benefiting from the absorbing neutrons capability of boron atoms, an addition of 0.55% h -BN to the EP resin could reduce the neutron transmittance of the resin by 5.6%. This study demonstrates that the blending with h -BN can increase the radiation-resistant property of EP resin, meanwhile augmenting the neutron shielding ability.
研究领域:
材料科学
·
核工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Surface Investigation
·
2023
·Vol. 17
·期 1
·202-207
·
IF 0.4
Iurina V. I.,Dudin A. N.,Neshchimenko V. V.,Mikhailov M. M.
Abstract The effect of a fluence of electrons with an energy of 30 keV in the range of (1–7) × 10 16 cm –2 on the concentration of color centers in micron-sized hollow particles of aluminum oxide is studied in comparison with bulk Al 2 O 3 microparticles. The analysis is carried out in situ according to diffuse reflection spectra in the range from 250 to 2500 nm. The radiation resistance of the studied microspheres is estimated relative to Al 2 O 3 microparticles from analysis of the difference spectra of diffuse reflection obtained by subtracting the spectra after irradiation from the spectra of nonirradiated samples. Changes in the difference spectra of diffuse reflection of aluminum-oxide microparticles and microspheres show that with an increase in the electron fluence, the induced absorption increases throughout the entire spectrum. It is established that the radiation resistance of aluminum-oxide microspheres to the action of electrons with an energy of 30 keV at a fluence of (1–7) × 10 16 cm –2 is greater than the radiation resistance of Al 2 O 3 microparticles. An increase in the radiation resistance of hollow aluminum-oxide particles is due to a low concentration of radiation-induced defects in the anion sublattice.
研究领域:
材料科学
·
辐射物理学
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Hang Shen,Zhihao Wu,Yifan Li,Xiangyi Du,Ruiyang Dou,Qiang Liu,Bowen Dai,Mingzhang Lin,Wei Huang,Hongbing Chen
With the widespread use of nuclear science and technology, slowing down the aging of polymers in a radiation environment has become a matter of great concern. In this work, cerium dioxide (CeO 2 ) and CeO 2 encapsulated with dopamine (PDA@CeO 2 ) were selected as special fillers to prepare the silicone rubber (SR) composites, and their radiation resistance were investigated by comparing the mechanical properties and thermal performance before and after irradiation. The interfacial bridge formed by PDA results in a greater elongation at break for PDA@CeO 2 /SR5.0 (770.0 ± 33.6 %) than for CeO 2 /SR (686.0 ± 15.0 %). After irradiation with γ-rays, the retention of elongation at break of both CeO 2 /SR0.1 and PDA@CeO 2 /SR0.1 were larger than SR. Furthermore, PDA@CeO 2 /SR0.1 showed an impressive retention of 90.5 ± 2.7 % of the tensile strength retention after exposure to an absorbed dose of 200 kGy. The disparity in crosslink density prior to and following irradiation indicated that both CeO 2 and PDA@CeO 2 were efficacious in reducing radiation crosslinking within the SR. An electron paramagnetic resonance spectrometer and an ultraviolet lamp (UV-EPR) were used to observe in real time the free radical scavenging ability of CeO 2 and PDA@CeO 2 inside the SR. These results indicated that CeO 2 and PDA@CeO 2 was expected to prevent further chain reactions in silicone rubber by scavenging free radicals generated in SR, thus improving the radiation resistance of SR.
研究领域:
材料科学
·
辐射生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2023
·
IF 3.6
Chenyu Tang,Teliang Lu,Haishan Shi,Jiandong Ye
The anti-washout ability of calcium phosphate cement (CPC) determines the effectiveness of CPC in clinical application. The γ-ray irradiation method often used in the sterilization process of CPC products is easy to degrade some commonly polymer anti-washout agent, which greatly reduces its anti-washout performance. Artemisia sphaerocephala Krasch gum (ASKG) has the potential of radiation resistance and anti-washout, but no one has considered its performance as anti-washout agent of CPC and mechanism of radiation resistance and anti-washout so far. In this study, we report the effect of γ-ray on ASKG and the effectiveness of ASKG for enhancing of radiation resistance and anti-washout ability of CPC, the physical, chemical properties and in vitro cell behaviors of ASKG-CPCs were also investigated. The results showed that addition of ASKG before and after irradiation could significantly enhanced the anti-washout performance of CPC, which is differ from conventional anti-washout agents. Meanwhile, ASKG-CPCs had an excellent injectable property and biocompatibility, and low content of irradiated ASKG could promote bone differentiation well. We anticipate that the radiation-resistant and anti-washout ASKG-CPCs have potential application prospect in orthopaedic surgery.
研究领域:
生物医学工程
·
材料科学
·
骨科手术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF INORGANIC BIOCHEMISTRY
·
2025
·
IF 3.2
Hao Wang,Guozhu Ren,Yue Xu,Ruiping Deng,Rui Wang,Liang Zhou
In this work, novel erbium complex with anticancer activity against radiation resistant lung adenocarcinoma cells was obtained and demonstrated. Firstly, stronger inhibitory effect of Er 3+ on non-small cell lung cancer (NSCLC) cells and NSCLC- radiation resistant (RR) cells was experimentally confirmed. Then, by selecting highly biocompatible porphyrins as ligands, a novel erbium complex tetraphenylporphyrin erbium acetylacetonate (Er(acac)TPP) was synthesized and purified. Compared with Cisplatin, notably, Er(acac)TPP exhibits relatively higher inhibitory efficiency on NSCLC-RR cells. Moreover, the toxicities of Er(acac)TPP to normal cells are much lower than that of cancer cells. Subsequently, cell expansion, increased apoptosis, a decline in mitochondrial membrane potential (MMP), an accumulation of intracellular reactive oxygen species (ROS), increased Caspase-9 protein level and G2/M arrest were seen. These data all pointed to Er(acac)TPP as a possible candidate for more research and development as a chemotherapeutic drug.
研究领域:
肿瘤学
·
药理学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Lei Yan,Qiang Wang,Chengcheng Xia,Wei Hou,Tao Han,Cheng Li,Kunzhi Chen,Kexin Chen,Lihua Dong
The skin is the largest organ of the human body, which can protect the tissues and organs in the body. However, the skin suffers damage and interference because of the effects of radiation, leading to roughness, inflammation and loss of elasticity. Here, a bio-based composite hydrogel with excellent radiation resistance and biocompatibility was successfully constructed by introducing graphene into polyvinyl alcohol. The skin exhibited less damage and no inflammation after 16 days radiation because of the protective effect of the hydrogel. The experimental results showed that the hydrogel could effectively protect cells from radiation damage, increase the cell survival rate by 70 %, and significantly accelerate the wound healing process, with a wound closure rate of 84 % within 16 days. Meanwhile, the graphene-doping PVA hydrogels reduces the number of skin cell death after radiation and promotes growth rates of cells. The hydrogels possess sensitivity and responsivity due to the conductivity, and monitor a variety of movement and electromyographic signals. Therefore, graphene-doping PVA hydrogels provide a convenient way to protect the skin, which are expected to achieve applications in radiation therapy, electronic skin, and wearable devices in the future.
研究领域:
生物医学工程
·
材料科学
·
皮肤病学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Ceramics
·
2017
·Vol. 7
·期 1
·41-49
·
IF 1.198
Peng Le,Zhang Kuibao,He Zongsheng,Yin Dan,Xue Jiali,Xu Chen,Zhang Haibin
In this research, Zr-doped Gd 2 Ti 2 O 7 pyrochlores, with the composition of Gd 2 (Ti 1- x Zr
x
) 2 O 7 , were firstly synthesized by self-propagating high-temperature synthesis plus quick pressing (SHS/QP) using CuO as the oxidant and Ti as the reductant. To improve the radiation resistance of titanate–pyrochlore, up to 35 at% Zr was incorporated to substitute the Ti site of Gd 2 Ti 2 O 7 pyrochlore (Gd 2 (Ti 0.75 Zr 0.35 ) 2 O 7 ). XRD and SEM microstructural characterizations showed the formation of a composite ceramic with the major pyrochlore phase and the minor Cu phase. The generated temperature of samples decreased from 1702 to 1011°C with increasing Zr content. The effects of sintering temperature and pressure time on phase composition and microstructure were systematically studied. Besides, the influence of thermal transmission on the whole combustion process was also explored. The pyrochlore-based waste form possessed high bulk density of 6.25 g/cm 3 and Vickers hardness of 10.81 GPa. The MCC-1 leaching test showed the normalized elemental leaching rates (42 d) of Cu, Gd, and Zr are 1.27×10 -2 , 1.33×10 -3 , and 8.44×10 -7 g·m -2 ·d -1 , respectively.
研究领域:
材料科学
·
核废料管理
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2021
·
IF 5.458
Dejun Zeng,Liyong Yuan,Pengcheng Zhang,Lin Wang,Zijie Li,Youqun Wang,Yunhai Liu,Weiqun Shi
HKUST-1@CMC (HK@CMC) composites that show good acid and alkali resistance and radiation resistance were successfully synthesized by introducing carboxymethyl cellulose (CMC) onto the surface of HKUST-1 using a foaming strategy. For the first time, the composites were explored as efficient adsorbents for U(VI) trapping from aqueous solution, with encouraging results of large adsorption capacity, fast adsorption kinetics, and desirable selectivity toward U(VI) over a series of competing ions. More importantly, a hybrid derivative film was successfully prepared for the dynamic adsorption of U(VI). The results show that ∼90% U(VI) can be removed when 45 mg L −1 U(VI) was passed through the film one time, and the removal percentage is still more than 80% even after four adsorption-desorption cycles, ranking one of the most practical U(VI) scavengers. This work offers new clues for application of the Metal-organic-framework-based materials in the separation of radionuclides from wastewater.
研究领域:
材料科学
·
环境科学
·
核化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）