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Efficient removal of tetracycline by H_(2)O_(2) activated with iron-doped biochar: Performance, mechanism, and degradation pathways

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Chinese Chemical Letters 2022年第4期33卷 2105-2110页

作者： Xiang Li Yan Jia Jiajia Zhang Yang Qin Yijia Wu Minghua Zhou Jianhui Sun School of Environment Henan Normal UniversityKey Laboratory of Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Key Laboratory for Environmental Pollution ControlInternational Joint Laboratory on Key Techniques in Water TreatmentHenan ProvinceHenan Engineering Laboratory of Environmental Functional Materials and Pollution ControlXinxiang 453007China Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationTianjin Key Laboratory of Environmental Technology for Complex Trans-Media PollutionTianjin Advanced Water Treatment Technology International Joint Research CenterCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China

In this study,novel iron-doped biochar(Fe-BC) was produced using a simple method,and it was used as an H_(2)O_(2)activator for tetracycline(TC) ***,iron loading can improve the separation performance and reactivity of biochar(BC).In the Fe-BC/H_(2)O_(2)system,92% of the TC was removed within 30 min with the apparent rate constant(k_(obs)) of 0.155 min^(-1),which was 23.85 times that in the case of the BC/H_(2)O_(2)system(0.0065 min^(-1)).The effects of the H_(2)O_(2) and Fe-BC dosage,initial pH,and TC concentration on the TC removal were *** radical quenching and electron paramagnetic resonance(EPR) measurements demonstrated that the removal of TC using the Fe-BC/H_(2)O_(2)process involved both radical(^(*)OH and O_(2)^(-)) and non-radical pathways(^(1)O_(2) and electron transfer).In addition,the performance of the catalyst was also affected by the persistent free radicals(PFRs) and defective sites on the ***,the degradation pathways of TC were proposed according to the intermediate products detected by LC-MS and the ecotoxicity of intermediates was ***,the Fe-BC/H_(2)O_(2)showed high resistance to inorganic anions and natural organic matter in aquatic ***,Fe-BC is expected to be an economic and highly efficient heterogeneous Fenton catalyst for removing the organic contaminants in wastewater.

关键词： Fe-BC Fenton-like Tetracycline Removal mechanisms Degradation pathways

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Improving the activity of electrochemical reduction of CO_(2) to C_(1) products by oxidation derived copper catalyst

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Materials Reports(Energy) 2023年第1期3卷 107-114,I0004页

作者： Lingxue Diao Yingda Liu Feifei Chen Hong Pan David Perez de Lara Hui Liu Yahui Cheng Feng Luo Department of Electronic Science and Engineering and Tianjin Key Laboratory of Process Control and Green Technology for Pharmaceutical Industry Nankai UniversityTianjin300350China Department of Basic Science Tianjin Agricultural UniversityTianjin300392China IMDEA Nanosci Faraday 9Ciudad Univ CantoblancoMadrid28049Spain Tianjin Key Lab for Rare Earth Materials and Applications Center for Rare Earth and Inorganic Functional MaterialsSchool of Materials Science and EngineeringNankai UniversityTianjin300350China

Cu-based electrocatalysts have become the focus in the field of electrochemical CO_(2) reduction reaction(ECO_(2) RR)due to their ability to produce multicarbon ***,the research on generating single carbon products with higher economic feasibility via ECO_(2) RR based on Cu-based electrocatalysts is rather rare,and the roles of the surface architecture and oxides of the electrocatalysts have not been explained *** this work,a two-step method including thermal oxidation and electroreduction is proposed to introduce Cuþinto pure Cu foil to form Cu_(2)O/Cu *** regulating the surface composition and morphology of the electrocatalyst in this way,the activity of ECO 2 RR to C_(1) products has been greatly *** Faradaic efficiency of carbon products of the Cu_(2)O/Cu electrode reaches 84%at?0.7 V *** with good selectivity for HCOOH and *** current density of Cu_(2)O/Cu electrode reaches-12.21 mA cm^(2) at-0.8 V ***,which is much higher than that of the Cu foil electrode(?0.09 mA cm?2).In-situ Raman characterization shows that Cuþin Cu_(2)O/Cu electrode could inhibit hydrogen generation and promote ECO_(2) RR by stabilizing the adsorption of CO_(2).

关键词： Cu-based electrocatalyst Electroreduction of CO_(2) In-situ Raman spectra C_(1)product

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Gas Evolution Monitoring in Lithium Batteries Based on Nonlinear Ultrasound Technique

Gas Evolution Monitoring in Lithium Batteries Based on Nonli...

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第43届中国控制会议

作者： Shihao Liu Yong Bao Chao Tan Tianjin Key Laboratory of Process Measurement and Control School of Electrical and Information Engineering Tianjin University

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

Recently,there has been renewed interest in gas evolution monitoring in Lithium *** gas evolution monitoring helps to gain insight information for safety,efficiency,and the degradation of the *** to the advantage of low cost,efficiency,and high sensitivity to material changes,various ultrasound-based techniques have been developed for gas evolution ***,these ultrasonic monitoring techniques,using travel-time or waveform amplitude measurement,cannot resolve small gas volume changes below the dead volume for early *** this paper,a novel gas evolution monitoring method based on the nonlinear ultrasound theory has been *** the use of high-intensity ultrasound excitation,the second harmonic amplitude,generated due to ultrasound nonlinear effect,can be used to detect the presence of *** simulation has been conducted to validate the performance of the proposed nonlinear ultrasonic gas evolution monitoring *** indicate that the nonlinear ultrasonic method has a higher spatial resolution for gas evolution detection in lithium batteries.

关键词： Lithium Battery Nonlinear Ultrasonic Gas Evolution

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Gas-liquid two-phase flow measurement based on frequency domain electromagnetic method

Gas-liquid two-phase flow measurement based on frequency dom...

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第43届中国控制会议

作者： Shuting Yan Chao Tan Yixuan Chen Guanghui Liang Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical and Information EngineeringTianjin University

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

It is possible to accurately predict oil production and locate oil through high-precision measurements of gas-liquid two-phase flow water content and *** measurements are essential for automating the management of oil recovery,monitoring the distribution status of oil and gas fields,and creating focused mining *** gas-liquid twophase flow parameters are found by monitoring changes in the induced eddy currents in the observed *** is accomplished by using the frequency domain electromagnetic method of gas-liquid two-phase flow parameter detection technology,which is based on the principle of electromagnetic ***,by examining the detection mechanism and features of the frequency-domain electromagnetic method,the viability of the method for detecting gas-liquid two-phase flow is theoretically confirmed with regard to the application of frequency-domain electromagnetism in medical brain ***,COMSOL multiphysics field simulation software is used to establish the gas-liquid two-phase flow model in the parallel coil detection *** analysis is conducted under the umbrella of frequency-domain electromagnetic research,and the simulation results of the electromagnetic induction method for high conductivity gas-liquid two-phase flow detection have a high measurement *** proving the viability of the frequency-domain electromagnetic method's gas-liquid two-phase flow parameter detection ***,the HF2LI lock-in amplifier handles the excitation and demodulation of the electromagnetic sensor parallel to the pipeline,which is intended to detect the gas-liquid two-phase flow within the *** is consistent with the theoretical derivation and the simulation analysis' s conclusion.

关键词： eddy current testing method gas-liquid two-phase flow moisture content conductivity

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Image Reconstruction for Electrical Resistance Tomography Using Convolutional Neural Network and Visual Geometry Group

Image Reconstruction for Electrical Resistance Tomography Us...

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第43届中国控制会议

作者： Jikun Ren Chao Tan Guanghui Liang Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical and Information EngineeringTianjin University

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

Electrical resistance tomography(ERT) is a process visualization *** has the advantages of non-radiation,non-invasiveness and fast response,and has been widely *** reconstruction of ERT faces the challenges of nonlinearity and ill-posedness of inverse problem,which makes the traditional image reconstruction algorithms suffer from low resolution and poor reconstruction *** improve the image reconstruction accuracy of ERT,a novel deep learning method using convolutional neural network(CNN) and visual geometry group(VGG) is *** network structure is based on CNN,and the convolution group adopts the convolution stacking method in the VGG model,and uses batch normalization and dropout strategies to improve network *** with the traditional image reconstruction methods and CNN network,simulation and experimental results show that the proposed CNN-VGG method has higher image reconstruction accuracy.

关键词： Electrical resistance tomography image reconstruction convolutional neural network visual geometry group

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Study on Liquid Film Characteristics of Supersonic Separator Based on Conductance Sensor Array

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IEEE Transactions on Instrumentation and Measurement 2025年 74卷

作者： Ding, Hongbing Ji, Chao Wang, Shiwei Sun, Hongjun Tianjin University Tianjin Key Laboratory of Process Measurement and Control School of Electrical and Information Engineering Tianjin300072 China

Supersonic separator is a promising technology for natural gas dehydration, and understanding the liquid film movement characteristics within the separator can significantly enhance separation efficiency. A 16×16 electrode-pair conductance sensor array was designed to conduct liquid film measurement in the expansion section of supersonic separator under different back pressure ratio and inlet liquid content. The results revealed that the fluctuations in liquid film thickness and the average energy decay rates were strongly influenced by the operating conditions, providing a real-time flow pattern monitoring approach based on frequency-domain energy. To further analyze liquid film characteristics, a liquid film thickness image reconstruction method based on time fusion and sensitivity matrix (TF-SM) was innovatively proposed. Compared to bicubic interpolation, TF-SM reduced the normalized mean square error (NMSE) from a maximum of 53.41% to 21.77%. The spatial velocity distribution of liquid film in different flow patterns was established using cross-correlation algorithm between reconstructed images, and the velocity fluctuations under different operating conditions were analyzed. Results showed that velocity fluctuations intensified as inlet liquid content increased and back pressure ratio decreased, with the mean absolute percentage error (MAPE) of velocity differences ranging from 0.4% to 8.7%. © 1963-2012 IEEE.

关键词： Separators

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Boron promoted Fe^(3+)/peracetic acid process for sulfamethazine degradation:Efficiency,role of boron,and identification of the reactive species

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Journal of Environmental Sciences 2024年第1期135卷 72-85页

作者： Yanhong Zhang Guangbing Liu Yuzhu Xue Lichun Fu Yawei Qian Minhui Hou Xiang Li Chen Ling Ying Zhang Yuwei Pan Jiangsu Provincial Key Laboratory of Environmental Engineering Jiangsu Provincial Academy of Environmental ScienceNanjing 210036China College of Biology and the Environment Nanjing Forestry UniversityNanjing 210037China School of Iron and Steel Soochow UniversitySuzhou 215000China School of the Environment Nanjing UniversityNanjing 210023China SUMEC Complete Equipment&Engineering Co. LTD.Nanjing 211500China Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China School of Environment Key Laboratory for Yellow River and Huai River Water Environmental and Pollution ControlMinistry of EducationHenan Key Laboratory for Environmental Pollution ControlHenan Normal UniversityXinxiang 453007China

In this work,boron(B)was used to promote Fe^(3+)/peracetic acid(Fe^(3+)/PAA)for the degradation of sulfamethazine(SMT).An SMT degradation efficiency of 9.1%was observed in the Fe^(3+)/PAA system over 60 min,which was significantly increased to 99.3%in the B/Fe^(3+)/PAA system over 10 *** B/Fe^(3+)/PAA process also exhibited superior resistance to natural substances,excellent adaptability to different harmful substances,and good removal of antibiotics in natural fresh water *** mechanism of action of boron for Fe^(3+)reduction was determined using scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),Fourier transform infrared(FT-IR)spectroscopy,density functional theory(DFT)calculations,and electrochemical *** dominant role of^(·)OH was confirmed using quenching experiments,electron spin resonance(EPR)spectroscopy,and quantitative *** radicals(R-O^(·))and Fe(IV)also significantly contribute to the removal of *** calculations on the reaction between Fe^(2+)and the PAA were conducted to further determine the contribution from ^(·)OH,R-O^(·),and Fe(IV)from the perspective of thermodynamics and the reaction *** boron dosages,Fe^(3+)dosages,and initial pH values were also investigated in the B/Fe^(3+)/PAA system to study their effect of SMT removal and the production of the reactive ***(IV)production determined the k_(R-O·+Fe(IV))value suggesting that Fe(IV)may play a more important role than R-O^(·).A comparison of the results with other processes has also proved that the procedure described in this study(B/Fe^(3+)/PAA)is an effective method for the degradation of antibiotics.

关键词： Boron Peracetic acid Sulfamethazine DFT Reactive species

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The significance of resource recycling for coking wastewater treatment:based on environmental and economic life cycle assessment

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Green Chemical Engineering 2024年第1期5卷 50-59页

作者： Di Zhang He Zhao Wenfang Gao Yuxing Sheng Hongbin Cao Institute of Process Engineering Innovation Academy for Green ManufactureChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China Chemistry&Chemical Engineering Data Center Chinese Academy of SciencesBeijing100190China Tianjin Key Laboratory of Clean Energy and Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China

The sustainability of the coking industry is supported by reasonable production profit and environmental quality *** traditional measures substantially increased the related costs for enterprises to reach *** paper aims to develop a comprehensive cost combined environmental impact assessment method that is necessary for the analysis of wastewater treatment *** three coking wastewater treatment processes in China were *** showed that eutrophication dominantly contributed to the overall environmental *** effluent quality could significantly reduce the total environmental *** terms of an economic perspective,the price of raw materials was the main factor that affected the operating cost of comprehensive *** on subsystem analysis,the pretreatment stage accounted for the majority of environmental and cost burdens,respectively reaching 64%-78%and 64%-86%.Optimizing the pretreatment process by enhancing the efficiency of high concentration raw material recovery and substituting toxic raw materials for extractant could reduce the environmental impact and economic cost by 43.8%and 57%,respectively,which was an effective way to improve the potential performance of coking wastewater treatment plants(WWTPs).

关键词： Life cycle assessment Environmental impact Economic evaluation Coking wastewater treatment Resource recycling Comprehensive benefits

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Interface Curvature Measurement of Liquid Film Based on SLIF

Interface Curvature Measurement of Liquid Film Based on SLIF

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IEEE Instrumentation and Measurement Technology Conference

作者： Jinshun Liu Ting Xue Songlin Li Tianjin Key Laboratory of Process Measurement and Control College of Electrical and Information Engineering Tianjin University Tianjin China

ISBN: (数字)9798350380903

ISBN: (纸本)9798350380910

Interface curvature is essential for characterizing the morphology of liquid film at a deeper level. However, few researches have been conducted to investigate the interface curvature feature. In this paper, a scanning laser-induced fluorescence (SLIF) measuring system is introduced to perform the 3-D measurement of liquid film, and the principle of laser scanning is illustrated. Subsequently, slice image processing, contour interpolation and the volume rendering methods are utilized sequentially to reconstruct the 3-D liquid film. Moreover, the point cloud extraction and the curved surface fitting are carried out to calculate the normal vector and the coefficients in fundamental forms I and II. Furthermore, the interface curvature of 3-D liquid film is measured. The axial distributions of the principal curvatures under the different circumferential locations are investigated, and the results show that the extreme bending of liquid film interface is different under the different positions. Then, the joint probability density of principal curvatures is analyzed. The distribution range of minimum curvature is linearly related to the maximum curvature and decreases with the increase of liquid flow rate. In addition, the frequency distribution characteristics of mean curvature and Gaussian curvature are discussed, and the correlation to the circumferential liquid film thickness is also analyzed to study the bending characteristics of liquid film interface. Finally, the joint probability density of mean curvature and Gaussian curvature under the different flow conditions is further investigated. The results display that the shape of most interface waves is similar to spherical cup-shaped, and the bending degree decreases as the liquid flow rate increases. These experimental results are helpful to investigate the 3-D interface morphology of liquid film more deeply.

关键词： Point cloud compression Surface reconstruction Liquids Morphology Surface morphology Bending Fluorescence

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Fuzzy-Model-Based Finite Frequency Fault Detection Filtering Design for Two-Dimensional Nonlinear Systems

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IEEE/CAA Journal of Automatica Sinica 2024年第10期11卷 2099-2110页

作者： Meng Wang Huaicheng Yan Jianbin Qiu Wenqiang Ji Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationSchool of Information Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Research Institute of Intelligent Control and Systems School of AstronauticsHarbin Institute of TechnologyHarbin 150080China School of Artificial Intelligence Hebei University of TechnologyTianjin 300401China IEEE

This article studies the fault detection filtering design problem for Roesser type two-dimensional(2-D)nonlinear systems described by uncertain 2-D Takagi-Sugeno(T-S)fuzzy ***,fuzzy Lyapunov functions are constructed and the 2-D Fourier transform is exploited,based on which a finite frequency fault detection filtering design method is proposed such that a residual signal is generated with robustness to external disturbances and sensitivity to *** has been shown that the utilization of available frequency spectrum information of faults and disturbances makes the proposed filtering design method more general and less conservative compared with a conventional nonfrequency based filtering design ***,with the proposed evaluation function and its threshold,a novel mixed finite frequency H_(∞)/H_(-)fault detection algorithm is developed,based on which the fault can be immediately detected once the evaluation function exceeds the ***,it is verified with simulation studies that the proposed method is effective and less conservative than conventional non-frequency and/or common Lyapunov function based filtering design methods.

关键词： Fault diagnosis finite frequency specifications mixed H_(∞)/H_(-)performance two-dimensional nonlinear systems

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