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Search for Solar Boosted Dark Matter Particles at the PandaX-4T Experiment

Physical Review Letters 2025年第16期134卷 161003-161003页

作者： Guofang Shen Zihao Bo Wei Chen Xun Chen Yunhua Chen Zhaokan Cheng Xiangyi Cui Yingjie Fan Deqing Fang Zhixing Gao Lisheng Geng Karl Giboni Xunan Guo Xuyuan Guo Zichao Guo Chencheng Han Ke Han Changda He Jinrong He Di Huang Houqi Huang Junting Huang Ruquan Hou Yu Hou Xiangdong Ji Xiangpan Ji Yonglin Ju Chenxiang Li Jiafu Li Mingchuan Li Shuaijie Li Tao Li Zhiyuan Li Qing Lin Jianglai Liu Congcong Lu Xiaoying Lu Lingyin Luo Yunyang Luo Wenbo Ma Yugang Ma Yajun Mao Yue Meng Xuyang Ning Binyu Pang Ningchun Qi Zhicheng Qian Xiangxiang Ren Dong Shan Xiaofeng Shang Xiyuan Shao Manbin Shen Wenliang Sun Yi Tao Anqing Wang Guanbo Wang Hao Wang Jiamin Wang Lei Wang Meng Wang Qiuhong Wang Shaobo Wang Siguang Wang Wei Wang Xiuli Wang Xu Wang Zhou Wang Yuehuan Wei Weihao Wu Yuan Wu Mengjiao Xiao Xiang Xiao Kaizhi Xiong Yifan Xu Shunyu Yao Binbin Yan Xiyu Yan Yong Yang Peihua Ye Chunxu Yu Ying Yuan Zhe Yuan Youhui Yun Xinning Zeng Minzhen Zhang Peng Zhang Shibo Zhang Shu Zhang Tao Zhang Wei Zhang Yang Zhang Yingxin Zhang Yuanyuan Zhang Li Zhao Jifang Zhou Jiaxu Zhou Jiayi Zhou Ning Zhou Xiaopeng Zhou Yubo Zhou Zhizhen Zhou Haipeng An Haoming Nie School of Physics Beihang University Beijing 102206 China School of Physics and Astronomy Shanghai Jiao Tong University Key Laboratory for Particle Astrophysics and Cosmology (MoE) Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai 200240 China New Cornerstone Science Laboratory Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai 201210 China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213 China Jinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan Province China Yalong River Hydropower Development Company Ltd. 288 Shuanglin Road Chengdu 610051 China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen University Zhuhai 519082 China Department of Physics Yantai University Yantai 264005 China Key Laboratory of Nuclear Physics and Ion-beam Application (MoE) Institute of Modern Physics Fudan University Shanghai 200433 China Peng Huanwu Collaborative Center for Research and Education Beihang University Beijing 100191 China International Research Center for Nuclei and Particles in the Cosmos and Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang University Beijing 100191 China Southern Center for Nuclear-Science Theory (SCNT) Institute of Modern Physics Chinese Academy of Sciences Huizhou 516000 China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong University Shanghai 200240 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Physics University of Maryland College Park Maryland 20742 USA School of Physics Nankai University Tianjin 300071 China School of Physics Sun Yat-Sen University Guangzhou 510275 China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei 230026 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China Research Center for Particle Science and Technology

We present a novel constraint on light dark matter utilizing 1.54 metric ton/year of data acquired from the PandaX-4T dual-phase xenon time projection chamber. This constraint is derived through detecting electronic recoil signals resulting from the interaction with solar-enhanced dark matter flux. Low-mass dark matter particles, lighter than a few MeV/c2, can scatter with the thermal electrons in the Sun. Consequently, with higher kinetic energy, the boosted dark matter component becomes detectable via contact scattering with xenon electrons, resulting in a few keV energy deposition that exceeds the threshold of PandaX-4T. We calculate the expected recoil energy in PandaX-4T considering the Sun’s acceleration with heavy mediators and the detection capabilities of the xenon detector. The first experimental search results using the xenon detector yield the most stringent upper limits cross section of 3.51×10−39 cm2 at 0.08 MeV/c2 for a solar boosted dark matter mass ranging from 0.02 to 10 MeV/c2, achieving a 23-fold improvement compared with earlier experimental studies.

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Fault diagnosis study for nuclear power plants under imbalanced fault sample datasets based on deep learning

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Annals of nuclear Energy 2025年 223卷

作者： Zhanguo Ma Jing Cui Jing Zhang Liang Zhang Wenhao Jia Long Tian School of Automation Harbin University of Science and Technology 150080 Harbin Heilongjiang China Fundamental Science on Nuclear Safety and Simulation Technology Laboratory College of Nuclear Science and Technology Harbin Engineering University 150001 Harbin Heilongjiang China CNNC China Nuclear Power Engineering Co. Ltd 100840 Beijing China NO.703 Research Institute of China State Shipbuilding Company Limited 150078 Harbin Heilongjiang China

The safety of nuclear power plants is crucial, and the situation awareness of the power plant is significantly important for the plant operation during which the fault diagnosis technology plays a key role for the plant state monitoring. Operation of the nuclear power plant is predominantly in a normal state, resulting in a scarcity of fault data. This scarcity leads to imbalanced training data, posing a challenge to the accuracy of fault diagnosis models. This study proposed a fault diagnosis framework that integrates Self-Attention Time-Series Generative Adversarial Networks (SATimeGAN) to augment the training datasets and Convolutional Neural Network-Bidirectional Long Short-Term Memory networks (CNN-BiLSTM) to diagnose the faults, aimed at addressing the data imbalance issue and improving the diagnostic accuracy. Experimental results demonstrate preferable performance of the model in nuclear power plant fault diagnosis, especially in handling imbalance sample fault datasets, compared to traditional CNN, LSTM, and BiLSTM models.

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Structure, corrosion resistance and nanomechanical properties of CoCrFeNiX (X=Nb,Mo,B,Si) high entropy alloys

arXiv

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arXiv 2025年

作者： Babilas, Rafal Bicz, Jakub Radoń, Adrian Kądziolka-Gawel, Mariola Lukowiec, Dariusz Matus, Krzysztof Wyszkowska, Edyta Kurpaska, Lukasz Rudomilova, Darya Mlynarek-Żak, Katarzyna Department of Engineering Materials and Biomaterials Silesian University of Technology Konarskiego 18a St. Gliwice44-100 Poland Lukasiewicz Research Network – Institute of Non-Ferrous Metals Sowińskiego 5 St. Gliwice44-100 Poland Institute of Physics University of Silesia in Katowice 75 Pulku Piechoty 1 Chorzów41-500 Poland Materials Research Laboratory Silesian University of Technology Konarskiego 18a St. Gliwice44-100 Poland National Centre for Nuclear Research NOMATEN CoE MAB+ Andrzeja Soltana 7 St. Świerk Otwock05-400 Poland Technopark Kralupy University of Chemistry and Technology Prague Prague166 28 Czech Republic Department of Engineering Processes Automation and Integrated Manufacturing Systems Silesian University of Technology Konarskiego 18a St. Gliwice44-100 Poland

In this work, the four high entropy CoCrFeNiX alloys (X=Mo,Nb,B,Si) were prepared by induction melting to comparatively analyse their structure, nanomechanical properties, and corrosion resistance in the chloride ion environment. The CoCrFeNiNb and CoCrFeNiMo alloys are composed of FCC solid solution and intermetallic phases (TM)2Nb and Cr-Mo-TM. In the case of the CoCrFeNiB alloy, a complex phase structure was revealed, consisting of FCC solid solution and three types of borides. In turn, the addition of Si substantially altered the phase composition of the CoCrFeNi alloy, resulting in the formation of two intermetallic phases. The corrosion behaviour of the alloys was studied in 3.5 and 5% NaCl solutions. The highest corrosion resistance in both solutions used characterize the CoCrFeNiSi alloy, showing the lowest corrosion current density and the most positive corrosion potential values. For measurements in 5% NaCl solution, icorr and Ecorr were equal to 0.24 μA/cm2 and -0.136 V. Currently, the least favourable corrosion parameters were recorded for the CoCrFeNiMo alloy. The results of EIS measurements confirmed the high protective abilities of passive film formed on the CoCrFeNiSi alloy surface. The highest strength properties were shown by the alloys with the addition of metalloids. For the CoCrFeNiSi alloy, the highest nanohardness value was obtained (above 15 GPa), while the CoCrFeNiB showed the highest Young modulus (above 275 GPa). © 2025, CC BY.

关键词： Sodium chloride

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Performance Calibration Study of the Payload Onboard the SVOM Satellite

Performance Calibration Study of the Payload Onboard the SVO...

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International Conference on Electronic Measurement and Instruments, ICEMI

作者： Tao Yu Siming Guo Jiang He Xing Wen Zheng Jiang Xiaoyu Qie Jinjie Wu The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China Division of Ionizing Radiation Metrology National Institute of Metrology (NIM) Beijing China Key Laboratory of Particle Astrophysics Institute of High Energy Physics Beijing China School of Science Hebei University of Science and Technology Shijiazhuang China

ISBN: (纸本)9781665444927

The ground-based calibration of the spectrometer onboard the astronomical satellite is extremely basic and important for the payload to complete the detection missions and achieve the scientific goals. With an excellent determination of the responsive relationship such as energy-channel relation, energy resolution, detection efficiency, and the non-uniformity of the detector, the observational data in orbit of the payload can be analyzed effectively and reasonably. The research has implemented the calibration campaign of a NaI(Tl) detector named GRD05, which is the main detector of the gamma-ray monitor (GRM) onboard the Space-based multiband astronomical Variable Objects Monitor(SVOM) satellite, utilizing a single-crystal monochromatic hard X-ray beam with the range of 15–40 keV. According to the data analysis results, the energy response and detection efficiency of the GRD05 are in good agreement with the expected output by Monte Carlo simulations.

关键词： Satellites Monte Carlo methods Instruments Energy resolution Linearity Detectors Orbits

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Study on the Performance of SY-01 Satellite Gamma-Ray Detector

Study on the Performance of SY-01 Satellite Gamma-Ray Detect...

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International Conference on Electronic Measurement and Instruments, ICEMI

作者： Xiaoyu Qie Siming Guo Jiang He Zheng Jiang Tao Yu Xing Wen Shiwei Ren Zhenghua An Jinjie Wu School of Science Hebei University of Science and Technology Shijiazhuang China Division of Ionizing Radiation Metrology National Institute of Metrology(NIM) Beijing China Key Laboratory of Particle Astrophysics Institute of High Energy Physics Beijing China The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (纸本)9781665444927

The New Space technology Test Satellite (SY-01) is scheduled to carry out its first flight with a Chinese aerospace rocket, carrying multiple payloads to carry out space scientific exploration missions. SY-01 can carry multiple payloads to carry out space exploration missions. Among them, the High Energy Burst Researcher (HEBS) is one of the important payloads on the satellite. It will monitor the high-energy electromagnetic counterparts of gravitational wave events throughout the day and discover large samples of gamma-ray bursts. This paper mainly introduces the ground test experiment of the HEBS payload gamma-ray detector (GRD) and studies energy resolution and energy linearity in the range of (38–80)keV. The test results show that the GRD has good performance in the low-energy region, which can meet the requirements of monitoring gravitational wave gamma-ray bursts on-orbit.

关键词： Satellites Gamma-ray bursts Space missions Energy resolution Linearity Gravitational waves Detectors

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N-Isobutylphenothiazine as a Reversible and Stable Catholyte in Non-Aqueous Organic Redox Flow Batteries

SSRN

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SSRN 2023年

作者： Tegegne, Belay Getahun Kabtamu, Daniel Manaye Ou, Yun-Ting Chen, Guan-Cheng Huang, Zih-Jhong Hsu, Ning-Yih Ku, Hung-Hsien Wang, Yao-Ming Wang, Chen-Hao Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei106335 Taiwan Department of Chemistry Debre Berhan University Po.Box: 445 Debre Berhan Ethiopia Chemistry Division Institute of Nuclear Energy Research Atomic Energy Council Executive Yuan Taoyuan325207 Taiwan Industrial Upgrading of Science and Technology Metal Industries Research & Development Centre Kaohsiung811160 Taiwan Research Center National Cheng Kung University Tainan701401 Taiwan Center of Automation and Control National Taiwan University of Science and Technology Taipei106335 Taiwan

Nonaqueous organic redox flow batteries (NAORFBs) are the focus of current research because redox-active organic materials can be synthesized from abundant elements, and nonaqueous electrolytes offer higher open circuit voltage (OCV). The development of NAORFBs requires stable redox active materials in neutral forms and radical ions. N-substituted phenothiazines are organic catholytes with high electrochemical reversibility and stability. In this study, N-isobutylphenothiazine (iBuPT) was successfully synthesized in a single step from inexpensive precursors of 10H-phenothiazine and 1-bromo-2-methylpropane and used as catholyte material for NAORFB. iBuPT, a member of the N-substituted phenothiazine family, has a half-wave redox potential of 0.432 V, higher than most N-substituted phenothiazines. When iBuPT is coupled with anolyte 2,1,3-benzothiadiazole (BTD) with a half-wave potential of -1.82 V, the OCV value reaches 2.25 V. The half-wave potential of phenothiazine increases by 115 mV when an isobutyl group replaces the N-hydrogen, and the stability of the radical cation formed during electrochemical oxidation improves. The steric hindrance can be used to tune redox potential and stability. The stability of the iBuPT radical cation is attributed to the steric shielding and resonance stabilization provided by the one isobutyl group and two phenyl rings attached to the redox-active center, N, from which electron transfer occurs. iBuPT is a promising catholyte candidate for NAORFBs. © 2023, The Authors. All rights reserved.

关键词： Open circuit voltage

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Wide wall liquid film thickness distribution in narrow rectangular geometry for annular flow

引用

Annals of nuclear Energy 2025年 220卷

作者： Ju, Peng Xu, Xinhai Qi, Zhengqian Qu, Yi Jiang, Baixuan Li, Peize Hibiki, Takashi School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen Xili University Town Shenzhen518055 China CGN-HIT Advanced Nuclear and New Energy Research Institute China Department of Mechanical Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong

Annular flow in narrow rectangular geometries is critical for high-efficiency heat transfer systems, yet existing models—primarily developed for circular pipes—fail to capture the two-dimensional film thickness distribution inherent to asymmetric channels. This study addresses this gap by proposing a novel methodology that adapts conventional one-dimensional film thickness models to rectangular geometries through geometric and hydrodynamic considerations. Three characteristic lengths (hydraulic diameter, center-to-wall distance, and narrow gap) and two velocity profiles (1/7th power law turbulence and pressure-drop-derived phase separation) are systematically integrated into six methodologies to predict wide-wall film thickness. Validated against experimental data from a 200 mm × 10 mm rectangular channel, the results demonstrate that Method 6—combining hydraulic diameter and pressure-drop-derived superficial liquid velocity—achieves better accuracy by accounting for gas-core dominance at the channel center and confinement effects. While the framework reliably predicts wide-wall film thinning, challenges persist near the narrow wall due to flow regime transitions. This work advances the theoretical foundation for annular flow modeling in non-circular geometries, offering critical insights for enhancing thermal–hydraulic safety in nuclear reactors, compact heat exchangers, and high-power electronics cooling systems. © 2025 Elsevier Ltd

关键词： Electronic cooling

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Search for Double Beta Decay of 136Xe to the 0+1 Excited State of 136Ba with PandaX-4T

arXiv

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arXiv 2025年

作者： Luo, Lingyin Bo, Zihao Chen, Wei Chen, Xun Chen, Yunhua Cheng, Zhaokan Cui, Xiangyi Fan, Yingjie Fang, Deqing Gao, Zhixing Geng, Lisheng Giboni, Karl Guo, Xunan Guo, Xuyuan Guo, Zichao Han, Chencheng Han, Ke He, Changda He, Jinrong Huang, Di Huang, Houqi Huang, Junting Hou, Ruquan Hou, Yu Ji, Xiangdong Ji, Xiangpan Ju, Yonglin Li, Chenxiang Li, Tao Li, Jiafu Li, Mingchuan Li, Shuaijie Li, Zhiyuan Lin, Qing Liu, Jianglai Lu, Congcong Lu, Xiaoying Luo, Yunyang Ma, Wenbo Ma, Yugang Mao, Yajun Meng, Yue Ning, Xuyang Pang, Binyu Qi, Ningchun Qian, Zhicheng Ren, Xiangxiang Shan, Dong Shang, Xiaofeng Shao, Xiyuan Shen, Guofang Shen, Manbin Sun, Wenliang Tao, Yi Wang, Anqing Wang, Guanbo Wang, Hao Wang, Jiamin Wang, Lei Wang, Meng Wang, Qiuhong Wang, Shaobo Wang, Siguang Wang, Wei Wang, Xiuli Wang, Xu Wang, Zhou Wei, Yuehuan Wu, Weihao Wu, Yuan Xiao, Mengjiao Xiao, Xiang Xiong, Kaizhi Xu, Yifan Yao, Shunyu Yan, Binbin Yan, Xiyu Yang, Yong Ye, Peihua Yu, Chunxu Yuan, Ying Yuan, Zhe Yun, Youhui Zeng, Xinning Zhang, Minzhen Zhang, Peng Zhang, Shibo Zhang, Shu Zhang, Tao Zhang, Wei Zhang, Yang Zhang, Yingxin Zhang, Yuanyuan Zhao, Li Zhou, Jifang Zhou, Jiaxu Zhou, Ning Zhou, Xiaopeng Zhou, Yubo Zhou, Zhizhen New Cornerstone Science Laboratory Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai201210 China State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing100871 China Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai200240 China Jinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan Province China Yalong River Hydropower Development Company Ltd. 288 Shuanglin Road Chengdu610051 China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen University Zhuhai519082 China Department of Physics Yantai University Yantai264005 China Institute of Modern Physics Fudan University Shanghai200433 China School of Physics Beihang University Beijing102206 China Peng Huanwu Collaborative Center for Research and Education Beihang University Beijing100191 China International Research Center for Nuclei and Particles in the Cosmos Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang University Beijing100191 China Institute of Modern Physics Chinese Academy of Sciences Huizhou516000 China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong University Shanghai200240 China Shanghai Jiao Tong University Sichuan Research Institute Chengdu610213 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China Department of Physics University of Maryland College ParkMD20742 United States School of Physics Nankai University Tianjin300071 China School of Physics Sun Yat-Sen University Guangzhou510275 China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei230026 China Department of Modern Physics University of Science and Technology of China Hefei230026 China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary Science Shandong University Shandong Qingdao266237 China Key Laboratory o

We perform a search of double beta decay of 136Xe to the excited state, 0+1 , of 136Ba (2νββ-0+1 ), using the dual-phase xenon detector of PandaX-4T with the first 94.9-day commissioning data. The multi-site events are reconstructed up to the MeV energy scale, which helps to improve the background model significantly. The background contribution from the stainless steel platform outside PandaX-4T cryostat is evaluated for the first time. No significant evidence for 2νββ-0+1 is observed, resulting in a lower limit on half-life of 7.5×1022 yr at the 90% confidence level. This is the first experimental limit on such a rare decay in a natural xenon-based detector. © 2025, CC BY.

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The complementary role of carbon dioxide removal: A catalyst for advancing the COP28 pledges towards the 1.5 °C Paris Agreement target

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Science of the Total Environment 2024年 947卷 174302页

作者： Acen, Caroline Bamisile, Olusola Cai, Dongsheng Ukwuoma, Chiagoziem C. Obiora, Sandra Huang, Qi Uzun Ozsahin, Dilber Adun, Humphrey College of Nuclear Science and Automation Engineering Sichuan Industrial Internet Intelligent Monitoring and Application Research Center Chengdu University of Technology Sichuan Chengdu China Centre for Environmental Policy Imperial College London United Kingdom Leeds Business School Leeds Beckett University LeedsLS1 3HE United Kingdom Electrical Engineering Department Southwest University of Science and Technology Sichuan Maiyang China Department of Medical Diagnostic Imaging College of Health Science University of Sharjah Sharjah United Arab Emirates Research Institute for Medical and Health Sciences University of Sharjah Sharjah United Arab Emirates Operational Research Centre in Healthcare Near East University TRNC Nicosia Mersin 1099138 Turkey Energy and Environmental Science Division University of Dundee Scotland United Kingdom

As the imperative to address climate change becomes more pressing, there is an increasing focus on limiting global temperature increase to 1.5 °C by the end of the century relative to pre-industrial levels. During the recent Conference of Parties (COP28), nations committed to tripling renewable energy generation to a minimum of 11,000 GW by 2030 and increasing the global annual energy efficiency from 2 % to 4 % annually until 2030. Additionally, the Food and Agricultural Organization (FAO) introduced a roadmap to transition the Agri-food system from a net emitter to a carbon sink. The role of carbon dioxide removal (CDR) is important;first to accelerate the near-term reduction in net emissions, counterbalance residual emissions at the point of net-zero by mid-century, and sustain large net negative emissions beyond mid-century to return warming to safe levels after decades of temporal overshoot. This paper assesses the impact of the COP 28 agreements, alongside the complementary role of CDR on emission levels, energy structure, land use, and global warming temperature. The findings indicate that implementing the COP28 pledges and FAO roadmap leads to a warming temperature of 2 °C, falling short of the ambitious 1.5 °C temperature limit. Likewise, more stringent actions on transitioning away from fossil plants is a high-priority mitigation action which drives significant emissions reduction. The modelled result shows that Agricultural soil carbon and biochar contribute 47–58 % share of the total CDR deployed in the stylized scenarios. In conclusion, CDR can expedite climate goals but must complement emission reduction efforts;hence, the transition away from fossil fuels should prompt the development of detailed roadmaps. Also, more global efforts should be placed on nature-based CDR methods, as they offer diverse co-benefits. © 2024 Elsevier B.V.

关键词： Global warming

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Adsorption behavior and mechanism of U(VI) on cetyltrimethylammonium bromide-modified bentonite-MOF composite

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Journal of Solid State Chemistry 2025年 349卷

作者： Xun Li Xuanying Lu Bingtao Gui Cheng Wang Jun Liu Liang Lu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen University Zhuhai 519082 PR China Chengdu University of Technology College of Nuclear Technology and Automation Engineering Dongsanlu Erxianqiao Chengdu 610059 Sichuan PR China United Laboratory of Frontier Radiotherapy Technology of Sun Yat-sen University & Chinese Academy of Sciences Ion Medical Technology Co. Ltd. Guangzhou 510030 PR China Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province (Chengdu University of Technology) 1# Dongsanlu Erxianqiao Chengdu 610059 Sichuan PR China

Seawater uranium extraction is a key technology for environmental sustainability with significant potential applications. For the first time, this work synthesized a CTAB/Bent-MOF808 with strong stability, abundant coordination functional groups, and low cost, and assessed its adsorption effectiveness for U (VI) in carbonate solutions. The study explores how pH, contact time, uranium concentration, temperature, carbonate, halide salts, phosphorus, and Ca/Mg ions influence uranium adsorption, with a focus on mechanistic insights through characterization and modeling. Under optimal conditions (temperature of 25 °C, pH 8.0, with a sodium bicarbonate concentration of 2 mmol L −1 and a U(VI) concentration of 50 mg L −1 ), which are similar to the real seawater environment, CTAB/Bent-MOF808 demonstrated superior uranium adsorption performance compared to MOF808 and CTAB/Bent in U(VI)–CO 3 solutions. Under high initial pH, NaHCO 3 , Ca/Mg ions, and halide ion concentrations, the complex's uranium adsorption capacity and removal rate are reduced due to competitive adsorption between ions, as well as increased electrostatic repulsion on the surface. The sorption process was identified as monolayer homogeneous chemical adsorption process by analyzing it with quasi second order kinetic models and Langmuir isotherm models. The inhibitory effect of halide ions is as follows: I − > F − > Br − > Cl − . XPS suggested that the complexation of bromide anion with –COOH and electrostatic attraction could be crucial processes for uranium adsorption. This study offers theoretical insights into uranium extraction from natural uranium-bearing waters and highlights the expanded potential of MOF-based adsorbents in this process, enhancing both efficiency and application scope.

关键词： Adsorption CTAB/bent-MOF808 MOFs Seawater U(VI) complexes ions

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