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Biochar-supported nano-scale zerovalent iron activated persulfate for remediation of aromatic hydrocarbon-contaminated soil:an in-situ pilot-scale study

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Biochar 2022年第1期4卷 122-133页

作者： Yu Zeng Tai Li Yingzhi Ding Guodong Fang Xiaolei Wang Bo Ye Liqiang Ge Juan Gao Yujun Wang Dongmei Zhou Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China School of Environmental and Safety Engineering Changzhou UniversityChangzhou 213164China School of Earth and Environment Anhui University of Science and TechnologyHuainan 232001People’s Republic of China Geological Survey of Jiangsu Province Nanjing 210018People’s Republic of China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023People’s Republic of China

Biochar supported nano-scale zerovalent iron(nZVI/BC)for persulfate(PS)activation has been studied extensively for the degradation of pollutants on the lab scale,but it was rarely applied in practical soil remediation in the *** this research,we developed a facile ball-milling method for the mass production of nZVI/BC,which was successfully applied to activate persulfate for the remediation of organic polluted soil on an in-situ pilot ***-situ high-pressure injection device was developed to inject nZVI/BC suspension and PS solution into the soil with a depth of 0-70 *** removal efficiency of target pollutants such as 2-ethylnitrobenzene(ENB,1.47-1.56 mg/kg),biphenyl(BP,0.19-0.21 mg/kg),4-(methylsulfonyl)toluene(MST,0.32-0.43 mg/kg),and 4-phenylphenol(PP,1.70-2.46 mg/kg)at different soil depths was 99.7%,99.1%,99.9%and 99.7%,respectively,after 360 days of *** application of nZVI/BC significantly increased the degradation rates of contaminants by 11-322%,ascribed to its relatively higher efficiency of free radical generation than that of control *** addition,it was found that nZVI/BC-PS inhibited soil urease and sucrase enzyme activities by 1-61%within 55 days due to the oxidative stress for microbes induced by free radicals,while these inhibition effects disappeared with remediation time prolonged(>127 days).Our research provides a useful implementation case of remediation with nZVI/BC-PS activation and verifies its feasibility in practical contaminated soil remediation.

关键词： Persulfate Biochar Nanoscale zerovalent iron Pilot-scale Enzyme activities

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Janus C-Pan/Ph Membranes for Simulated Shale Gas Wastewater (Sgw) Treatment in Membrane Distillation: Integrating Surface Property and Catalytic Degradation for Anti-Fouling

SSRN

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SSRN 2023年

作者： Xu, Chao Xu, Shihong Song, Jialing Jiang, Nan Yan, Mengying Li, Jun Huang, Manhong Key Laboratory of Science & Technology of Eco-Textile Ministry of Education College of Environmental Science and Engineering Donghua University Shanghai201620 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai201620 China

Membrane distillation (MD) is considered to be an effective method to treat shale gas wastewater (SGW). However, membrane fouling has become big obstacle for this process. To alleviate membrane fouling, a novel dual-layer nanofibrous catalytic membrane (C-PAN/PH) contains a hydrophilic polyacrylonitrile (PAN) layer with Co-TPML nano-catalysts, and hydrophobic poly (vinylidene fluoride-hexafluoropropylene) (PH) layer was fabricated through electrospinning. Owning to surface hydration and peroxymonosulfate (PMS) activation of this novel membrane, feed solution containing kerosene or aniline could be effectively treated. Results showed water flux of C-PAN/PH membrane was 38% higher than that of PH membrane, which was due to higher temperature distribution in hydrophilic layer. C-PAN/PH membrane also exhibited stable flux for 10 h in dealing with 3000 mg/L oil/water emulsion due to hydration capability and small adhesion free energy of hydrophilic layer. Further, C-PAN/PH could remove>92% of the aniline within 2 min, and electron paramagnetic resonance (EPR) analyze indicated reactive species (•OH and SO4•-) play primary role in degradation process. Density functional theory (DFT) simulation suggests that PMS was strongly adsorbed on Co with adsorption energy of -3.77 eV. This study aims to design a novel MD-specific membrane for SGW treatment. © 2023, The Authors. All rights reserved.

关键词： Wastewater treatment

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The DNA damage and regulatory strategy in hematopoietic stem cells after irradiation exposure:Progress and challenges

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Radiation Medicine and Protection 2024年第1期5卷 16-23页

作者： Yanying Liu Naicheng Chen Fang Chen Hao Zeng Lijing Yang Junping Wang Mengjia Hu State Key Laboratory of Trauma Burns and Combined InjuryInstitute of Combined InjuryChongqing Engineering Research Center for NanomedicineCollege of Preventive MedicineThird Military Medical University(Army Medical University)Chongqing 400038China 31612 Unit of PLA Fujian 350200China Chinese PLA Center for Disease Control and Prevention Beijing 100071China

The hematopoietic system is susceptible to ionizing radiation(IR),which can cause acute hematopoietic failure or long-term *** the most primitive cells of the hematopoietic hierarchy,hematopoietic stem cells(HSCs)maintain lifelong hematopoietic homeostasis and promote hematopoietic regeneration during *** studies have shown that nuclear and mitochondrial genomes are the main targets of radiation injury in *** importantly,the damage of DNA may trigger a series of biological responses that largely determine HSC fate following IR *** some essential pathways and factors involved in DNA injury and damage in HSCs have been revealed,a comprehensive understanding of the biological effects of radiation on HSCs still needs to be *** review focuses on recent insights into the molecular mechanisms underlying DNA damage and repair in HSCs after *** summarize corresponding regulatory measures,which may provide a reference for further research in this field.

关键词： Ionizing radiation Hematopoietic stem cell DNA double-strand break DNA damage response DNA damage repair

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Research on Intelligent Identification and Quantitative Detection of Gas Leakage in Open Space

Research on Intelligent Identification and Quantitative Dete...

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第33届中国控制与决策会议

作者： Liang Zhu Anshan Xiao Xiaoming Chi Guolong Wang Mingjun Li Shaohua Gao Ming Ma He Zhang Shengjie Zhu Ming Jiang State Key Laboratory of Safety and Control for Chemicals SINOPEC Research Institute of Safety Engineering

Leakage is accident,leakage is *** accurate detection of gas leakage in open space will help enterprises to detect the leakage as early as possible,reducing the loss and impact of safety and environmental ***,this paper introduces the current situation of gas leakage detection technology in the open space,and the principle of quantum cascade lasers detection technology,comparing the different technologies of open path Fourier transform infrared spectrometry,solar occultation flux,tunable diode laser absorption spectroscopy,optic gas image and so ***,according to the technical advantages of open path quantum cascade lasers,combined with the characterization analysis of gas type,a three-layer neural network intelligent recognition model is designed by taking the specific wavelength spectrum absorption detection value as the input and the material type as the output,2480 groups of sample data were used to train and verify the detection *** results show that the accuracy rate of leakage gas identification is more than 98%,and the quantitative detection error is less than 8%.Finally,the paper describes an open space application test based on an unmanned aerial vehicle platform,with a horizontal distance of 150 meters and a vertical height of 30 meters,which provides a new method for rapid identification and quantitative detection of gas leakage in open space.

关键词： Open Space Gas Leakage Quantum Cascade Laser Intelligent Identification Quantitative Detection

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Photo-Reductive Decomposition and Defluorination of Perfluorooctane Sulfonate (Pfos) in UV/Iodide System

SSRN

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SSRN 2022年

作者： Chu, Liquan Zhang, Chaojie Chen, Pei Zhou, Qi Zhou, Xuefei Zhang, Yalie State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Perfluorooctane sulfonate (PFOS) is a typical perfluorinated compound, and the presence of sulfonic groups makes it more difficult to decompose compared with other perfluorinated compounds. In this study, ultraviolet photolysis of iodide (UV/KI) was conducted to generate hydrated electrons for the decomposition of PFOS, the key factors affecting the decomposition efficiency were investigated and the possible decomposition pathways were speculated. The results implied that the UV/KI system can effectively promote the decomposition and defluorination of PFOS. When PFOS concentration was 0.03 mmol L-1 and KI was 0.3 mmol L-1, the decomposition and defluorination efficiency of PFOS at pH 10 reached 99.5% and 94.8% after 12 hours of reaction, respectively. With the increase of KI concentration from 0.1 to 0.5 mmol L-1, the decomposition and defluorination efficiency of PFOS increased, but further increase of KI will lead to the decrease of the decomposition performance. Weak and strong alkaline conditions were more favorable for PFOS decomposition in comparison to acid conditions. Compared with UV/Sulfite system, our system can be conducted under lower concentration of eaq- source chemicals and wider range of pH. Kinetic analysis implied that the decomposition of PFOS followed the pseudo first-order model with a reaction rate constant of 1.004 h-1, which was higher than those for most decomposition processes for PFOS. Intermediate products analysis and mass balance indicated there were three decomposition pathways of PFOS, namely, sulfonic group removal, H/F exchange and C-C bond dissociation. © 2022, The Authors. All rights reserved.

关键词： Rate constants

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A Novel Visual Perception Framework for Unmanned Aerial Vehicles: Challenges and Approaches

A Novel Visual Perception Framework for Unmanned Aerial Vehi...

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2021 China Automation Congress, CAC 2021

作者： Li, Xuan Duan, Haibin Mo, Hong Wang, Fei-Yue Department of Mathematics and Theories Peng Cheng Laboratory Shenzhen518055 China The State Key Laboratory of Virtual Reality Technology and Systems School of Automation Science and Electrical Engineering Beihang University Beijing100083 China The School of Electrical and Information Engineering Changsha University of Science and Technology Changsha410114 China The State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing100190 China

ISBN: (纸本)9781665426473

Change detection (CD) is an important preprocessing process in visual perception. Due to the difficulties of collection and labeling images in water scnens, the design and validation of the change detection algorithm is more difficult than expected. In this paper, we present a novel visual perception framework based on parallel vision for unmanned aerial vehicle (UAV). The visual perception framework consists of artificial scenes, computational experiments and parallel execution. In artificial scenes, we construct a water scene and automatically generated pixel-level image annotation. Next, computational experiments are carried out on different domain dataset. The experiment results show that: 1) mixed images effectively improve the performance of change detection model;2) domain shift problems still greatly affect the algorithm performance. © 2021 IEEE

关键词： Change detection

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Fungal-derived selenium nanoparticles and their potential applications in electroless silver coatings for preventing pin-tract infections

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Regenerative Biomaterials 2022年第1期9卷 41-51页

作者： Xinjin Liang Shuai Zhang Geoffrey Michael Gadd John McGrath David W.Rooney Qi Zhao The Bryden Centre School of Chemical and Chemistry EngineeringQueen’s University BelfastUniveristy RoadBelfast BT71NNUK Geomicrobiology Group School of Life SciencesUniversity of DundeeDow StreetDundee DD15EHUK School of Pharmacy Queen’s University BelfastLisburn RoadBelfast BT97BLUK State Key Laboratory of Heavy Oil Processing Beijing Key Laboratory of Oil and Gas Pollution ControlCollege of Chemical Engineering and EnvironmentChina University of Petroleum18 Fuxue RoadChangping DistrictBeijing 102249China School of Biological Sciences Queen’s University BelfastChlorine GardensBelfast BT95DLUK School of Chemistry and Chemical Engineering Queen’s University BelfastStranmillis RoadBelfast BT95AGUK School of Science and Engineering University of DundeeNethergateDundee DD14HNUK

Pin-tract infections(PTIs)are a common complication of external fixation of fractures and current strategies for preventing PTIs have proven to be *** advances show that the use of anti-infection coatings with local antibacterial activity may solve this *** has been considered as a promising anti-infection agent owing to its antibacterial and antibiofilm *** this study,selenium nanoparticles(SeNPs)were synthesized via a cost-effective fungi-mediated biorecovery approach and demonstrated excellent stability and *** investigate their anti-infection potential,the SeNPs were doped in silver coatings through an electroless plating process and the silver–selenium(Ag–Se)coatings were tested for antibacterial and antibiofilm properties against Staphylococcus aureus F1557 and Escherichia coli WT F1693 as well as corrosion resistance in simulated body *** was found that the Ag–Se coating significantly inhibited *** growth and biofilm formation on the surface,reducing 81.2%and 59.7%of viable bacterial adhesion when compared with Ag and Ag–PTFE-coated surfaces after 3 *** Ag–Se coating also exhibited improved corrosion resistance compared with the Ag coating,leading to a controlled release of Ag^(+),which in turn reduced the risk of cytotoxicity against *** results suggest that the fungal-derived SeNPs may have potential in use as implant coatings to prevent PTIs.

关键词： infection coating silver selenium fungi

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Soft-Landing Dynamics of a Type of Four-Legged Space Lander

SSRN

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SSRN 2024年

作者： Shi, Tengfei Shi, Tengfei Yang, Yinping Zhang, Zhijuan Liu, Cuicui Liu, Caishan Ma, Daolin Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and Aerospace Engineering Southwest Jiaotong University Chengdu610031 China State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Beijing100871 China Institute of Dynamics and Control College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing100871 China China Academy of Space Technology Beijing100094 China School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai200240 China Key Laboratory of Marine Intelligent Equipment and System Ministry of Education Shanghai200240 China

Analyzing the landing dynamics response is essential for enhancing the success rate of surface explorations on Mars, the moon, or asteroids. This paper develops a comprehensive dynamics model for a space lander equipped with four sets of buffer legs, each consisting of a primary strut, two secondary struts, and a footpad, during its soft landing process. The degrees of freedom of the main body and the footpads are defined as generalized coordinates to describe the motion of the space lander. The compression force of the buffer struts is obtained by interpolating real experimental data, and the contact force between the footpad and the ground is calculated using Archimedes law for granular media. Then, the dynamical model for the lander in terms of minimal degrees of freedom can be constructed by applying the Lagrange equations of the second kind. The proposed dynamics model is validated by the experiments of a single-legged lander vertical touchdown and a four-legged lander free touchdown. Moreover, histories of buffer force, acceleration of the main body, and other key physical quantities are computed to investigate the landing process. This highly efficient and accurate dynamics model provides a method to perform extensive simulations to design and optimize a soft landing process. © 2024, The Authors. All rights reserved.

关键词： Landing

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Wind Speed Data Repairing Method Based on Bidirectional Prediction

Wind Speed Data Repairing Method Based on Bidirectional Pred...

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2021 IEEE International Conference on Power Electronics, Computer Applications, ICPECA 2021

作者： Shen, Xincheng Qu, Yi Huang, Shaoxiong Li, Zhi Zhang, Kaifeng Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Nanjing China State Grid Anhui Electric Power Co. Ltd Department of Dispatch Center Hefei China

ISBN: (纸本)9781728190037

In order to repair the lost data in distributed wind power system, this paper puts forward a wind speed data repairing model based on a new bidirectional prediction method. This model consists of two one-way prediction models. In each prediction model, the original wind speed data are decomposed into several intrinsic mode functions (IMFs) and a residue signal by ensemble empirical mode decomposition (EEMD) method. Then the Savitzky-Golay (SG) filter is used to reduce noise for high-frequency IMFs. Next the long short-term memory (LSTM) model and autoregressive integrated moving average (ARIMA) model are combined to predict low-frequency IMFs and the noise reduction results respectively. At the end, all those forecast results are added and form a one-way result. By weighted average of two one -way results, the repairing result is calculated. The experimental results from multiple prediction cases show that this method can get more accurate results. © 2021 IEEE.

关键词： Empirical mode decomposition

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Exploring Token-Level Augmentation in Vision Transformer for Semi-Supervised Semantic Segmentation

arXiv

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arXiv 2025年

作者： Zhang, Dengke Tang, Quan Liu, Fagui Mei, Haiqing Chen, C.L. Philip The School of Computer Science and Engineering South China University of Technology Guangzhou510006 China The Department of New Network Pengcheng Laboratory Shenzhen518000 China The China Tobacco Guangdong Industrial Corporation Guangzhou510385 China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing100080 China

Semi-supervised semantic segmentation has witnessed remarkable advancements in recent years. However, existing algorithms are based on convolutional neural networks and directly applying them to Vision Transformers poses certain limitations due to conceptual disparities. To this end, we propose TokenMix, a data augmentation technique specifically designed for semi-supervised semantic segmentation with Vision Transformers. TokenMix aligns well with the global attention mechanism by mixing images at the token level, enhancing learning capability for contextual information among image patches. We further incorporate image augmentation and feature augmentation to promote the diversity of augmentation. Moreover, to enhance consistency regularization, we propose a dual-branch framework where each branch applies image and feature augmentation to the input image. We conduct extensive experiments across multiple benchmark datasets, including Pascal VOC 2012, Cityscapes, and COCO. Results suggest that the proposed method outperforms state-of-the-art algorithms with notably observed accuracy improvement, especially under limited fine annotations. Copyright © 2025, The Authors. All rights reserved.

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