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SSRN 2023年

作者： Xu, Chenglong Chen, Chu Xing, Wen Herrera-Viedma, Enrique College of Intelligent Systems Science and Engineering Harbin Engineering University Harbin150001 China Qingdao Innovation and Development Center Harbin Engineering University Qingdao266000 China Shenyang SIASUN Robot & Automation Co. LTD Shenyang110168 China Andalusian Research Institute of Data Science and Computational Intelligence Department of Computer Science and AI University of Granada Granada18071 Spain

Depth estimation plays an important role in 3D visual perception, autonomous vehicles, and near-field optical detection. At present, there are mainly learning-based methods and traditional geometric constraint reasoning based methods. However, most learning-based methods have poor cross-domain generalization, the accuracy will be greatly reduced when tested on new scenes. Although the traditional geometric methods have strong scene adaptability, they have more marginal noise in depth discontinuity areas, and require a large amount of memory at a high bandwidth. In order to solve the above problems, we present a disparity confidence propagation and edge smoothing framework, which combines robust semantic mask with tree diffusion model. Compared with those of state-of-the-art fast geometric constraint based methods and learning-based methods, the proposed method has a great improvement in cross-domain adaptability and efficiency. Experiments on multiple data sets verify the effectiveness of the method, and a good balance is achieved between generalization and accuracy. © 2023, The Authors. All rights reserved.

关键词： Semantics

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Targeting Phosphorus Transformation to Hydroxyapatite Through Sewage Sludge Pyrolysis Boosted by Quicklime Toward Phosphorus Fertilizer Alternative with Toxic Metals Compromised

SSRN

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SSRN 2023年

作者： Tang, Siqi Liang, Jiaming Xu, Xuming Jin, Yongsheng Xuan, Weiwei Li, Ouyang Fang, Le Li, Zhenshan College of Environmental Sciences and Engineering Key Laboratory of Water and Sediment Sciences Ministry of Education Peking University Beijing100871 China College of Bioscience and Resources Environment Beijing University of Agriculture Beijing102208 China School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing100083 China Research and Development Center for Watershed Environmental Eco-Engineering Beijing Normal University Zhuhai519087 China

Advancing pyrolysis practice for phosphorus (P) recovery and recycling from sewage sludge arouses intensive research interests due to the forthcoming threat of global P sustainability. However, how to both in situ manipulate P targeted transformation to a designed form and accommodate downstream use while compromise adverse impacts of concomitant toxic metals (TMs) challenges the worldwide initiative of P reclamation from sewage sludge. Here, we propose a P targeted transformation to hydroxyapatite (P2tHAP) technique to bridge the discrepancy of P recovery and subsequent use. Through manipulating calcium-to-P molar ratio (Ca/P) of sludge feedstock by calcium oxide, the sludge P can be targetedly transformed to HAP during pyrolysis, a bioavailable form delivered as sewage sludge char-derived phosphorus fertilizer (SCPF) alternative. The P supply competency of the SCPF for Ca/P below or above 1.67 with a risk abatement of TMs was comparable to conventional P fertilizer, while the Ca/P = 1.67 was prone to the occurrence of sludge ash sintering, detrimental to the HAP formation. The lowered bioavailability of TMs was orchestrated by the root-secreted oxalic acid, due to the triggered phosphate starvation response. The random forest analysis indicated the driving force in the evolution of rhizobacterial communities, dominantly arising from those TMs after the SCPF application. Thermodynamic and kinetic calculations validated that HAP with the stable molar Gibbs energy gHAP (~ -7.29×103 kJ/mol) underpinned the progress of P2tHAP during sludge pyrolysis. The outcome prospects to propel the integrative design of an innovative reclamation of P-rich wastes and simultaneous compromise of concomitant contaminants. © 2023, The Authors. All rights reserved.

关键词： Hydroxyapatite

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Reconciled estimation of Antarctic ice sheet mass balance and contribution to global sea level change from 1996 to 2021

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Science China Earth Sciences 2024年第11期67卷 3562-3578页

作者： Rongxing LI Guojun LI Gang HAI Huan XIE Yuan CHENG Wei CHEN Xiangbin CUI Minghu DING Chunchun GAO Tong HAO Changqing KE Chuanjin LI Jin LI Yan LIU Jiangjun RAN Jiawen REN Qiang SHEN Yunzhong SHEN Hongling SHI Songyun WANG Zemin WANG Jingang ZHAN Baojun ZHANG Min ZHONG Chunxia ZHOU Center for Spatial Information Science and Sustainable Development Applications Tongji UniversityShanghai 200092China College of Surveying and Geo-informatics Tongji UniversityShanghai 200092China Institute for the Conservation of Cultural Heritage School of Cultural Heritage and Information ManagementShanghai UniversityShanghai 200444China College of Resource Environment and Tourism Hubei University of Arts and ScienceXiangyang 441053China Polar Research Institute of China Shanghai 200136China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China College of Geodesy and Geomatics Shandong University of Science and TechnologyQingdao 266590China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China State Key Laboratory of Remote Sensing Science Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Geodesy and Earth’s Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China Center for Space Research University of Texas at AustinAustin TX 78759USA Chinese Antarctic Center of Surveying and Mapping Wuhan UniversityWuhan 430079China School of Geospatial Engineering and Science Sun Yat-sen UniversityZhuhai 519082China

The Antarctic Ice Sheet(AIS)has been losing ice mass and contributing to global sea level rise(GSLR).Given its mass that is enough to cause~58 m of GSLR,accurate estimation of mass balance trend is critical for AIS mass loss monitoring and sea level rise ***,we present an improved approach to reconciled solutions of mass balance in AIS and its regions from multiple contributing solutions using the input-out,altimetric,and gravimetric *** comparison to previous methods,such as IMBIE 2018,this approach utilizes an adaptive data aggregation window to handle the heterogeneity of the contributing solutions,including the number of solutions,temporal distributions,uncertainties,and estimation *** improved the regression-based method by using a two-step procedure that establishes ensembled solutions within each method(input-output,altimetry,or gravimetry)and then estimates the method-independent reconciled *** the first time,16contributing solutions from 8 Chinese institutions are used to estimate the reconciled mass balance of AIS and its regions from1996 to *** results show that AIS has lost a total ice mass of~3213±253 Gt during the period,an equivalent of~8.9±0.7 mm of *** is a sustained mass loss acceleration since 2006,from 88.1±3.6 Gt yr^(-1)during 1996–2005 to 130.7±8.4 Gt yr^(-1)during 2006–2013 and further to 157.0±9.0 Gt yr^(-1)during 2014–*** mass loss signal in the West Antarctica and Antarctic Peninsula is dominant and clearly presented in the reconciled estimation and contributing solutions,regardless of estimation methods used and fluctuation of surface mass *** and challenges remain in mass balance estimation in East *** reconciled estimation approach can be extended and applied for improved mass balance estimation in the Greenland Ice Sheet and mountain glacier regions.

关键词： Antarctic Ice Sheet Ice mass loss acceleration Sea level rise Reconciled estimation

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Detecting neutrinos from supernova bursts in PandaX-4T

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Chinese Physics C 2024年第7期48卷 14-21页

作者：庞彬宇阿布都沙拉木·阿布都克力木薄子豪陈葳谌勋程晨成兆侃崔祥仪樊英杰方德清符长波付孟婷耿立升 Karl Giboni 顾琳慧郭绪元韩晨成韩柯何昶达何金荣黄迪黄彦霖黄俊挺黄周侯汝全侯钰季向东巨永林李晨翔李家富李名川李帅杰李涛林箐刘江来陆聪聪芦晓盈罗棱尹罗云阳马文博马余刚冒亚军孟月宁旭阳祁宁春钱志成任祥祥 Nasir Shaheed 尚晓凤邵熙元申国防司琳孙文良谈安迪陶奕王安庆王萌王秋红王少博王思广王为王秀丽王舟魏月环武蒙蒙邬维浩夏经铠肖梦姣肖翔谢鹏伟燕斌斌颜玺雨杨继军杨勇姚玉坤喻纯旭袁影苑哲鑫宁张丹张敏桢张鹏张世博张澍张涛张洋张瀛心张园园赵力郑其斌周济芳周宁周小朋周永周钰博 New Cornerstone Science Laboratory Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai200240China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237ShandongChina Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237ShandongChina School of Physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai519082China Department of Physics Yantai UniversityYantai 264005China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Peking UniversityBeijing 100871China School of Physics Beihang UniversityBeijing 102206China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Physics University of MarylandCollege ParkMaryland 20742USA State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China School of Physics Nankai UniversityTian

Neutrinos from core-collapse supernovae are essential for understanding neutrino physics and stellar ***-phase xenon dark matter detectors can be used to track explosions of galactic supernovae by detecting neutrinos through coherent elastic neutrino-nucleus *** this study,a variation of progenitor masses and explosion models are assumed to predict neutrino fluxes and spectra,which result in the number of expected neutrino events ranging from 6.6 to 13.7 at a distance of 10 kpc over a 10-s duration with negligible backgrounds at *** specialized triggering alarms for monitoring supernova burst neutrinos are *** efficiency of detecting supernova explosions at various distances in the Milky Way is *** alarms will be implemented in the real-time supernova monitoring system at PandaX-4T in the near future,which will provide supernova early warnings for the astronomical community.

关键词： core-collapse supernovae neutrinos liquid xenon detectors supernova early warnings

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Topological inverse band theory in waveguide quantum electrodynamics

arXiv

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arXiv 2023年

作者： Ke, Yongguan Huang, Jiaxuan Liu, Wenjie Kivshar, Yuri Lee, Chaohong Institute of Quantum Precision Measurement State Key Laboratory of Radio Frequency Heterogeneous Integration Shenzhen University Shenzhen518060 China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Zhuhai519082 China Shenzhen518045 China Nonlinear Physics Center Research School of Physics Australian National University CanberraACT2601 Australia Qingdao Innovation and Development Center Harbin Engineering University Qingdao266000 China

Topological phases play a crucial role in the fundamental physics of light-matter interaction and emerging applications of quantum technologies. However, the topological band theory of waveguide QED systems is known to break down, because the energy bands become disconnected. Here, we introduce a concept of the inverse energy band and explore analytically topological scattering in a waveguide with an array of quantum emitters. We uncover a rich structure of topological phase transitions, symmetric scale-free localization, completely flat bands, and the corresponding dark Wannier states. Although bulk-edge correspondence is partially broken because of radiative decay, we prove analytically that the scale-free localized states are distributed in a single inverse energy band in the topological phase and in two inverse bands in the trivial phase. Surprisingly, the winding number of the scattering textures depends on both the topological phase of inverse subradiant band and the odevity of the cell number. Our work uncovers the field of the topological inverse bands, and it brings a novel vision to topological phases in light-matter interactions. © 2023, CC BY.

关键词： Waveguides

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A Framework to Quantitatively Assess the Influence of Lulc on Coastal Wetland Hydrological Connectivity from a Landscape Resistance Perspective

SSRN

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SSRN 2023年

作者： Man, Ying Du, Jizeng Lian, Zhongmin Wang, Qing Cui, Baoshan School of Environment Beijing Normal University State Key Joint Laboratory of Environmental Simulation and Pollution Control Beijing100875 China Yellow River Estuary Wetland Ecosystem Observation and Research Station Ministry of Education Shandong257500 China College of Ecology Lanzhou University Lanzhou730000 China Research and Development Center for Watershed Environmental Eco-Engineering Beijing Normal University Zhuhai519087 China

Land use and land cover (LULC) change is one of the dominant factors contributing to coastal wetland degradation and loss. Most studies focused on LULC changes or their influence on specific ecosystem components. However, LULC's influence on the hydrological connectivity of coastal wetlands has yet to be studied, especially in quantitatively assessing the influence on spatial and temporal scales. This study aimed to understand how LULC affected hydrological connectivity in the coastal wetlands in the Yellow River Delta (YRD), China, from 1985 to 2020. A framework from a landscape resistance perspective was used to evaluate the LULC's influence. LULCs were converted into a series of resistance surfaces whose values represent the degree to which LULC facilitated or restricted hydrological connectivity. The hydrological connectivity of coastal wetlands was based on the hydrological distance between key hydrological nodes in each tidal creek. LULC's influence was evaluated by parameterizing the resistance surfaces using observed hydrological connectivity. The results showed that most resistance surfaces are related to human activity (90.9%). The critical time of LULC's influence on hydrological connectivity was 1985‒1990 (offshore water with a resistance value of 1.000 and tidal flat, 0.922) and 2010‒2015 (mariculture, 0.915), and the critical areas were Zone II (tidal flat, 0.993), Zone VI (river, 0.739), and Zone I (grass, 0.728). This study provided a framework to identify and evaluate the influence of LULC on hydrological connectivity. It could guide the management of LULC in coastal areas to mitigate the adverse effects on hydrological connectivity. © 2023, The Authors. All rights reserved.

关键词： Land use

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Urban constructed wetlands: Assessing ecosystem services and disservices for safe, resilient, and sustainable cities

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Frontiers of engineering Management 2023年第4期10卷 582-596页

作者： Aamir Mehmood SHAH Gengyuan LIU Yu CHEN Qing YANG Ningyu YAN Feni AGOSTINHO Cecilia MVBALMEIDA Biagio FGIANNETTI State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China Beijing Engineering Research Center for Watershed Environmental Restoration&Integrated Ecological Regulation Beijing 100875China Advanced Interdisciplinary Institute of Environment and Ecology Beijing Normal UniversityZhuhai 519087China Key Laboratory for City Environmental Safety and Green Development of the Ministry of Education Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou510006China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou511458China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing100875China Programa de Pós-graduação em Engenharia de Produção Laboratório de Produção e Meio AmbienteUniversidade Paulista(UNIP)São Paulo04026-002Brazil

Climate change and rapid urbanization are pressing environmental and social concerns, with approximately 56% of the global population living in urban areas. This number is expected to rise to 68% by 2050, leading to the expansion of cities and encroachment upon natural areas, including wetlands, causing their degradation and fragmentation. To mitigate these challenges, green and blue infrastructures (GBIs), such as constructed wetlands, have been proposed to emulate and replace the functions of natural wetlands. This study evaluates the potential of eight constructed wetlands near Beijing, China, focusing on their ecosystem services (ESs), cost savings related to human health, growing/maintenance expenses, and disservices using an emergy-based assessment procedure. The results indicate that all constructed wetlands effectively purify wastewater, reducing nutrient concentrations (e.g., total nitrogen, total phosphorus, and total suspended solids). Among the studied wetlands, the integrated vertical subsurface flow constructed wetland (CW-4) demonstrates the highest wastewater purification capability (1.63E+14 sej/m^(2)/yr) compared to other types (6.78E+13 and 2.08E+13 sej/m^(2)/yr). Additionally, constructed wetlands contribute to flood mitigation, groundwater recharge, wildlife habitat protection, and carbon sequestration, resembling the functions of natural wetlands. However, the implementation of constructed wetlands in cities is not without challenges, including greenhouse gas emissions, green waste management, mosquito issues, and disturbances in the surrounding urban areas, negatively impacting residents. The ternary phase diagram reveals that all constructed wetlands provide more benefits than costs and impacts. CW-4 shows the highest benefit-cost ratio, reaching 50%, while free water surface constructed wetland (CW-3) exhibits the lowest benefits (approximately 38%), higher impacts (approximately 25%), and lower costs (approximately 37%) compared to other we

关键词： constructed wetland emergy ecosystem services disservices ternary diagram

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An Interactive Annotation Method Based on Incremental Learning

An Interactive Annotation Method Based on Incremental Learni...

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Image Processing, Computer Vision and Machine Learning (ICICML), International Conference on

作者： Xiusheng Duan Guohua Sun Jingya Cao Yuyang Zhang Jingchao Yang Duyu Han Department of Artificial Intelligence and Big Data Hebei Polytechnic Institute Shijiazhuang China Intelligent Application Technology Research and Development Center Hebei Provincial University Road Traffic Perception Shijiazhuang China School of Mechanical Engineering Shijiazhuang Tiedao University Shijiazhuang China Faculty of Robot Science and Engineering Northeastern University Shenyang China Hebei Jiaotong Vocational and Technical College Shijiazhuang China

In recent years, military science and technology has been developed rapidly, and new equipments has been equipped in the army. Augmented Reality (AR) technology provides the possibility to solve the problem of equipments operation training. But in the training process, One of the essential technologies is how to location and identify the operation keys. Obviously, the sample set of equipments operation keys is the basis of key recognition, and a certain scale of sample set is an indispensable element to ensure the performance of the recognition model. On the basis of manually establishing a small sample set, this paper puts forward a mechanism based on interactive automatic sample labeling and sample set expanding, the target recognition model was updated by incremental learning method at the same time.

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Searching for neutrinoless double-beta decay of 136Xe with PandaX-4T

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Science Bulletin 2025年第11期70卷 1779-1785页

作者： Zhang, Shu 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, Jiafu Li, Mingchuan Li, Shuaijie Li, Tao Li, Zhiyuan Lin, Qing Liu, Jianglai Lu, Congcong Lu, Xiaoying Luo, Lingyin 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, Tao Zhang, Wei Zhang, Yang Zhang, Yingxin Zhang, Yuanyuan Zhao, Li Zhou, Jifang Zhou, Jiaxu Zhou, Jiayi Zhou, Ning Zhou, Xiaopeng Zhou, Yubo Zhou, Zhizhen New Cornerstone Science Laboratory Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai201210 China School of Physics Sun Yat-sen University Guangzhou510275 China School of Physics and Astronomy Shanghai Jiao Tong University Key Laboratory for Particle Astrophysics and Cosmology Ministry of Education Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai200240 China Shanghai Jiao Tong University Sichuan Research Institute Chengdu610213 China Jinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan Province Xichang615000 China Yalong River Hydropower Development Company Chengdu610051 China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen University Zhuhai519082 China Department of Physics Yantai University Yantai264005 China Key Laboratory of Nuclear Physics and Ion-beam Application Ministry of Education 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 Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang University Beijing102206 China Southern Center for Nuclear-Science Theory Institute of Modern Physics Chinese Academy of Sciences Huizhou516000 China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong University Shanghai200240 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China Department of Physics University of Maryland College Park Maryland20742 United States School of Physics Nankai University Tianjin300071 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 Sci

We report the search for neutrinoless double-beta decay of 136Xe from the PandaX-4T experiment with a 3.7-tonne natural xenon target. The data reconstruction and the background modeling are optimized in the MeV energy region. A blind analysis is performed with data from the commissioning run and the first science run. No significant excess of signal over the background is observed. A lower limit on the half-life of 136Xe neutrinoless double-beta decay is established to be 2.1×1024 yr at the 90% confidence level, with a 136Xe exposure of 44.6 kg⋅yr. Our result represents the most stringent constraint from a natural xenon detector to date. © 2025 Science China Press

关键词： Majorana neutrino Natural xenon detector Neutrinoless double-beta decay

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Interface engineering of Laminated Redox-Copolymers for Electrochemical Remediation of Perfluoroalkyl Substances

SSRN

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SSRN 2024年

作者： Yang, Wenjian Lai, Yangyu Yang, Kui Zhou, Yang Duan, Xiaoguang Cai, Yanpeng Ma, Jinxing Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Key Laboratory for City Cluster Environmental Safety and Green Development the Ministry of Education School of Ecology Environment and Resources Guangdong University of Technology Guangzhou510006 China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological Engineering Guangdong University of Technology Guangzhou510006 China School of Environmental Science and Engineering Guangdong University of Technology Guangzhou510006 China Advanced Interdisciplinary Institute of Environment and Ecology Beijing Normal University Zhuhai519087 China School of Chemical Engineering The University of Adelaide AdelaideSA5005 Australia

Redox polymers now show promise for selective removal of perfluoroalkyl substances from a complex aqueous matrix at high energy efficiency and no secondary pollution. However, self-agglomeration of redox polymers is a dominating barrier to constructing a low-cost, stable system in practical applications. Herein, we introduce polymer interface engineering strategy to enhance the activity of amine functionalities and nitrous oxide radicals in copolymers composed of 4-methacryloyloxy-2,2,6,6-tetramethylpiperidin-1-oxyl and 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine. The grafted laminated redox polymer on multi-walled carbon nanotubes (termed MWCNT-g-P(TMPMA-co-TMA)) via free-radical polymerization demonstrated 19.1-59.9% increase in the electrosorption capacity for perfluorooctanoic acid (PFOA) (>230 mg g-1) and sustainable regeneration efficiency at ~80%. The core-shell structure of MWCNT-g-P(TMPMA-co-TMA) with a laminated redox polymer layer of ~5 nm processed a low charge transfer resistance, which is expected to contribute to the enhanced capture performance and stability. An integrated system consisting of a MWCNT-g-P(TMPMA-co-TMA) electrosorption electrode and a boron-doped diamond electrode can efficiently separate and degrade trace-concentration PFOA from industrial wastewater at high mineralization efficiency. This work provides insight into the design and optimization of redox active materials for water purification and beyond. © 2024, The Authors. All rights reserved.

关键词： Free radical polymerization

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