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Sustainable Generation of Sulfate Radicals and Decontamination of Micropollutants via Sequential Electrochemistry

engineering 2023年第11期30卷 144-152页

作者： Wentian Zheng Shijie You Yuan Yao Nanqi Ren Bin Ding Fang Li Yanbiao Liu College of Environmental Science and Engineering Donghua UniversityShanghai 201620China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150080China Innovation Center for Textile Science and Technology College of TextilesDonghua UniversityShanghai 200051China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

The removal of emerging micropollutants in the aquatic environment remains a global *** routes are often chemically,energetically,and operationally intensive,which decreases their sustainability during ***,we develop an advanced chemical-free strategy for micropollutants decontamination that is solely based on sequential electrochemistry involving ubiquitous sulfate anions in natural and engineered *** can be achieved via a chain reaction initiated by electrocatalytic anodic sulfate(SO_(4)^(2-))oxidation to produce persulfate(S_(2)O_(8)^(2-))and followed by a cathodic persulfate reduction to produce sulfate radicals(SO_(4)^(·-)).These SO_(4)^(·-)are powerful reactive species that enable the unselective degradation of micropollutants and yield SO_(4)^(2-)again in the treated *** proposed flow-through electrochemical system achieves the efficient degradation(100.0%)and total organic carbon removal(65.0%)of aniline under optimized conditions with a single-pass *** also reveal the effectiveness of the proposed system for the degradation of a wide array of emerging micropollutants over a broad pH range and in complex *** work provides the first proof-ofconcept demonstration using ubiquitous sulfate for micropollutants decontamination,making water purification more sustainable and more economical.

关键词： Advanced oxidation Chain reaction Sulfate radical Micropollutants Sequential electrochemistry

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Wastewater treatment meets artificial photosynthesis:Solar to green fuel production,water remediation and carbon emission reduction

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Frontiers of environmental Science & engineering 2022年第4期16卷 157-160页

作者： Zhida Li Lu Lu State Key Laboratory of Urban Water Resource and Environment School of Civil and Environmental EngineeringHarbin Institute of TechnologyShenzhen 518055China

Current wastewater treatment(WWT)is energy-intensive and leads to vast CO_(2) *** pledge of“double carbon”target encourages a paradigm shift from fossil fiiels use to renewable energy harvesting during *** this context,hybrid microbial photoelectrochemical(MPEC)system integrating microbial electrochemical WWT with artificial photosynthesis(APS)emerges as a promising approach to tackle water-energy-carbon challenges ***,we emphasized the significance to implement energy recovery during WWT for achieving the carbon neutrality ***,we elucidated the working principle of MPEC and its advantages compared with conventional APS,and discussed its potential in fulfilling energy self-sustaining WWT,carbon capture and solar fuel ***,we provided a strategy to judge the carbon profit by analysis of energy and carbon fluxes in a MPEC using several common organics in ***,MPEC provides an alternative of WWT approach to assist carbon-neutral goal,and simultaneously achieves solar harvesting,conversion and storage.

关键词： Wastewater treatment Artificial photosynthesis Microbial photoelectrochemical(MPEC)system Carbon neutral Renewable energy

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Novel process for facile preparation of mesoporous silica-based materials with controllable pore structure from coal fly ash Author links open overlay panel

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Particuology 2024年第8期91卷 128-137页

作者： Jian-ming Gao Zhen Li Shujia Ma Yuanyuan Zhang Fangqin Cheng Institute of Resources and Environment Engineering State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste ResourcesShanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related WastesShanxi UniversityTaiyuan 030006China

Extraction of silica from fly ash to produce mesoporous silica materials is one of the most important utilization *** silica could not be synthesized on a large-scale by conventional sol-gel *** this paper,facile preparation of mesoporous silica with controllable pore structure from fly ash by the template-free process via two steps of mineral phase transformation and selective acid etching was *** influence of crystalline structure and acid etching degree on structure of as-synthesized mesoporous silica materials was revealed,as well as mechanism of crystalline structure transformation and pore structure *** results show that mullite and quartz could be transformed into acid-soluble kaliophilite when fly ash reacted with K_(2)CO_(3)at temperature of 800-1100℃.The hexagonal kaliophilite would be transformed into orthorhombic KAlSiO_(4)-O1 phase when the temperature is controlled at 1100℃.Mesoporous silica with specific surface area of 475.93 m^(2)/g and 642.57 m^(2)/g could be synthesized from activated fly ash with kaliophilite and KAlSiO_(4)-O1 phase crystalline *** controlling the degree of acid etching,mesoporous silica materials with different pore structures can be *** paper provides a cost-effective and large-scale process for the preparation of mesoporous silica materials with controllable pore structure from solid waste fly ash.

关键词： Fly ash Mesoporous silica Crystal transformation Acid etching Controllable pore structure

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Vibration response and safety control for blasting vibration of the existing tunnel with defects

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Underground Space 2024年第2期15卷 76-89页

作者： Junying Xia Bo Wang Xinxin Guo Zhuoxiong Xie Key Laboratory of Transportation Tunnel Engineering Ministry of EducationSouthwest Jiaotong UniversityChengdu 610031China College of Environment and Civil Engineering Chengdu University of TechnologyChengdu 610059China Guangdong Communication Planning&Design Institute Group Co. LtdGuangzhou 510507China

Current studies on blasting construction of small clear-distance tunnels have not considered the impact of existing tunnel lining defects when establishing safety *** paper offers a series of study results based on the blasting project of a new tunnel adjacent to the existing defect Xinling tunnel to thoroughly examine the dynamic response,safety control standards,and measures of the existing defect ***,structural models were developed to investigate the influence of the presence or absence of specific defects(like lining cracks and cavities behind the lining)on the dynamic response of the current tunnel lining to identify the most unfavorable defect ***,establish safety control standards for intact linings and those with the most unfavorable ***,two types of control measures,single safe charge and reasonable delay time,were studied based on the established safety control *** particular,the most adverse position of cracks was the wall facing the explosion,the rise in depth was more unfavorable for vibration response,and the impact of the longitudinal crack was restricted to the vicinity of the *** the vault was the most adverse cavity position,the rise in cavity area was more damaging,and the influence range varied with longitudinal cavity ***,the impact of cracks was mainly evident in the amplification effect of stress at the crack *** contrast,cavities had varied degrees of amplification effects on the vibration velocity and stress response and a relatively extensive influence *** control research was conducted,when the tunnel was intact,with a right wall crack,a vault cavity,and both vault cavity and crack for this project,the peak particle velocity(PPV)of the safety control standard for vibration velocity was 13,10,13,and 8 cm/s,respectively,and the respective single safe charge could be adjusted at 64,53,37,and 25 ***,the presence of different defects had a relati

关键词： Existing tunnel Defect Blasting construction Vibration response Control standards and measures

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Investigation of Losses in the Integrated Charger by Using Variable Flux Reluctance Machine

Investigation of Losses in the Integrated Charger by Using V...

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2024 IEEE International Conference on Electrical Energy Conversion Systems and Control, IEECSC 2024

作者： Zang, Libin Hou, Weijie Li, Yuehua Du, Jingze Liu, Xu School of Mechanical Engineering Tianjin University Tianjin300350 China Tianjin Institute of Aerospace Mechanical and Electrical Equipment Tianjin Key Laboratory of Microgravity and Hypogravity Environment Simulation Technology Tianjin300301 China Hebei University of Technology State Key Lab of Reliability and Intelligence of Electrical Equipment Tianjin China

ISBN: (纸本)9798350389357

In order to reduce the cost and size of the on-board charger, it is proposed by using the integrated charger, which uses the multi-functional motor driver system for the battery charging. In this paper, an isolated integrated charger based on variable flux reluctance machine (VFRM) is investigated in terms of losses, since high efficiency is required for the integrated battery charger. Thus, in the paper the loss of the multi-functional VFRM at different frequencies with/without load will be investigated. Moreover, the losses in the converter are analyzed so as to explore the overall efficiency of the charging system, which can help to maximize the overall efficiency. For verification, a 12/10 VFRM was built and tested. It shows that at switch frequency of 20kHz, the overall loss of the integrated charging system is lowest. © 2024 IEEE.

关键词： Charging stations

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Simulation analysis on microscopic discharge characteristics of the bipolar corona of a floating conductor

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Plasma Science and technology 2023年第8期25卷 54-73页

作者：杨冬阳陈坚段泽民肖登明金之俭 Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240People's Republic of China Aviation Key Laboratory of Science and Technology on High Intensity Electromagnetic Environment Protection Anhui Province Key Laboratory of Aircraft Lightning ProtectionHefei 230031People's Republic of China

A floating conductor exhibits a bipolar corona phenomenon with microscopic discharge characteristics that are still *** this study,a plasma simulation model of the bipolar corona with 108 chemical reaction equations is established by combining hydrodynamics and plasma chemical *** evolution characteristics of electrons,positive ions,negative ions and neutral particles,as well as the distribution characteristics of space charges are analyzed,and the evolutionary flow of microscopic particles is *** results indicate that the positive end of the bipolar corona initiates discharge before the negative end,but the plasma chemistry at the negative end is more *** electron generation rate can reach 1240 mol(m^(3) s)^(-1),and the dissipation rate can reach 34 mol(m^(3) s)^(-1).The positive ion swarm is dominated by O_(4)^(+),and the maximum generation rate can reach 440 mol((m^(3) s)^(-1).The negative ion swarm is mainly O_(2) and O_(4).The O_(2) content is approximately 1.5-3 times that of O_(4),and the maximum reaction rate can reach 51 mol(m^(3) s)^(-1).The final destination of neutral particles is an accumulation in the form of O_(3) and NO,and the amount of O3 produced is approximately 4-6 times that of *** positive end of the bipolar corona is dominated by positive space charges,which continue to develop and spread outwards in the form of a pulse *** negative end exhibits a space charge distribution structure of concentrated positive charges and diffused negative *** validity of the microscopic simulation analysis is verified by the macroscopic discharge phenomenon.

关键词： bipolar corona evolution process floating conductor microscopic discharge characteristics space charge distribution

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Indoor air particles in research vessel from Shanghai to Antarctic: Characteristics, influencing factors, and potential controlling pathway

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Journal of environmental Sciences 2023年第4期126卷 784-793页

作者： Xudong Wu Fange Yue Jiancheng Wang Xiawei Yu Hongwei Liu Weihua Gu Mingming Han Juan Li Zhouqing Xie Anhui Key Laboratory of Polar Environment and Global Change Department of Environmental Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Department of Anesthesiology the First Affiliated Hospital of University of Science and Technology of ChinaHefei 230001China Center for Excellence in Urban Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Despite millions of seafarers and passengers staying on ships each year, few studies have been conducted on the indoor air quality inside ship hulls. In this study, we investigated the levels and size distribution of indoor particulate matter during two cruises of the research vessel “Xuelong” from Shanghai to Antarctica. The results showed that the particle size less than 2.5 μm(PM_(2.5)), and particle size less than 10 μm(PM_(10)) concentrations in different rooms of the ship widely varied. We observed high particulate matter(PM) levels in some of the rooms. The mass concentration distribution was dominated by 1–4 μm particles, which may have been caused by the hygroscopic growth of fine particles. The dominant factors influencing PM concentrations were indoor temperature, relative humidity, and human activity. We quantified contributions of these factors to the levels of indoor particles using a generalized additive model. In clean rooms, the levels of indoor particles were controlled by temperature and relative humidity, whereas in polluted rooms, the levels of indoor particles were mainly influenced by temperature and human activity, which implied that controlling temperature and human activity would efficiently reduce the levels of indoor particles.

关键词： Indoor air Ship Influencing factor Generalized additive model(GAM) Quantification Controlling pathway

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Controllable and tunable plasma photonic crystals through a combination of photonic crystal and dielectric barrier discharge patterns

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Plasma Science and technology 2023年第8期25卷 74-86页

作者：郭丽婷潘宇扬于广林王朝阳高匡雅范伟丽董丽芳 Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240People's Republic of China Aviation Key Laboratory of Science and Technology on High Intensity Electromagnetic Environment Protection Anhui Province Key Laboratory of Aircraft Lightning ProtectionHefei 230031People's Republic of China

We report five types of patterns with square symmetry,including three novel types obtained by inserting a specially designed grid photonic crystal(PC)into a dielectric barrier discharge *** are studied using an intensified charge-coupled device camera and photomultiplier *** three novel types of patterns are a square pattern with one structure,a square superlattice pattern with four sublattices and a(1/4)K_(grid)(K_(grid)is the basic wave vector of the grid),and another square pattern with a complex inversion discharge *** the application viewpoint,the five types of patterns can be used as plasma photonic crystals(PPCs).Their band diagrams under a transverse-magnetic wave simulated by the finite element method show that there are a large number of band *** with the original PC with only a unidirectional band gap,the five types of PPCs have tunable and omnidirectional band gaps,which is very important in controlling the propagation of electromagnetic waves in the mm-wave *** experimental results enrich the pattern types in the dielectric barrier discharge system and provide a method for obtaining PPCs with symmetry controllability and bandgap tunability.

关键词： dielectric barrier discharge plasma photonic crystal patterns electromagnetic waves

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The preparation, microstructure, and performance of MoAlB-Si ceramic sintered from combustion-synthesized powder

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Ceramics International 2025年第16期51卷 21800-21809页

作者： Yu, Wanjun Ding, Qizhang Li, Xiangming Zhang, Enliang Han, Wenbo Zheng, Yongting Qi, Yushi School of Environment and Materials Engineering Yantai University Yantai264005 China School of Materials Science and Engineering Harbin Institute of Technology Weihai264209 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin150080 China

To streamline the preparation process and improve the performance of the MoAlB phase, the technical potential of an ultra-fast combustion synthesis followed by hot pressing to prepare the MoAlB–Si ceramic was investigated. During the combustion process, the Si atoms occupied the Al positions, which forms a Mo(Al,Si)B solid solution phase. Si doping resulted in the effective grain refinement of the hot-pressed MoAlB-Si ceramic. The grain-refined and solid-solution-strengthened MoAlB-Si ceramic exhibits excellent mechanical properties with a compressive strength of 2.63 GPa, flexural strength of 650 MPa, fracture toughness of 7.26 MPa m1/2, and Vickers hardness of 13.32 GPa. At elevated temperatures, a newly formed oxidation-derived dense and continuous layer on the surface prevents the inward diffusion of oxygen and the volatilisation of oxidation products, indicating good oxidation resistance of the MoAlB-Si ceramic. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Compressive strength

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The Interaction Between Internal Solitary Waves and Submarine Canyons

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Journal of Marine environmental engineering 2024年第2期11卷 129-139页

作者： Tian, Zhuangcai Huang, Jinjian Song, Lei Zhang, Mingwei Jia, Yonggang Yue, Jianhua State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology Xuzhou221116 China Yunlong Lake Laboratory of Deep Underground Science and Engineering Xuzhou221116 China Research Center for Deep Ocean Science and Underwater Engineering China University of Mining and Technology Xuzhou221116 China Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of China Qingdao266100 China School of Resources and Geosciences China University of Mining and Technology Xuzhou221116 China

Internal solitary waves (ISWs) occur in stratified seawater and are characterized by substantial amplitudes and short periods. ISWs engender significant interactions between seawater and seafloor topography. They resuspend seabed sediments in various ways, and the submarine canyon acts as a main channel for transporting the suspended sediments from the shallow sea to the deep sea. Among the seas worldwide where ISWs are prevalent, the South China Sea exhibits the largest amplitude of ISWs, and the ISWs directly interact with the seafloor topography near the Dongsha area in the northern South China Sea. Through the analysis of the water profile and high-resolution multi-beam detection data in the vicinity of the Dongsha area, it was found that the submarine canyon exerts a great impact on the sediment resuspension and the bottom nepheloid layer formation induced by ISWs. The observation results show that the concentration of suspended particulate matter within the submarine canyon is remarkably higher than that outside the canyon. The concentration at the bottom of the canyon can reach twice that of the outside regions, forming a vast bottom nepheloid layer. In addition, with the presence of the submarine canyon, the suspended matter carried by the ISWs accumulates in the water column above the canyon, leading to a higher concentration above the canyon. ISWs not only could influence the submarine canyons, but also interacted with it. This interaction enhanced the resuspension and transport of seafloor sediments along submarine canyons and trenches. This study deepens the understanding of the effect of ISWs on sediment resuspension in submarine canyons. © 2024 Old City Publishing, Inc.

关键词： Topography

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