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New Sight into the Enhanced Ozonation of Malodorous Compounds by Cu(Ii): Inhibiting the Formation of Free Radicals to Promote Ozone Utilization

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SSRN 2022年

作者： Lin, Xiaoqing Ma, Canming Wu, Deli State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Metal-enhanced ozonation can greatly improve the decay of organic matter;however, whether this method benefits the decay of malodorous compounds or not and the possible mechanism are not well understood. In this study, nine typical malodorous compounds were selected to reveal that Cu(II)-enhanced ozonation can greatly promote the decay of fatty amines because of the direct ozone oxidation, which was enhanced to promote ozone utilization. Moreover, trace Cu(II) can amplify the observed rate constants of dimethylamine and trimethylamine for 48.9% and 155.7%, respectively and Cu(II) dosage was the determining factor using response surface methodology to investigate the interactions between initial pH, Cu(II) dosage and ozone dosage. These results demonstrated that the formation of •OH and O2•– was inhibited rather than promoted, which was quite different from some previously reported Cu(II)-enhanced ozonation counterparts. Moreover, the enhanced effect of trace Cu(II) was exhibited in both single and complex malodorous compounds. The conversion pathway of nitrogen and sulfur elements was clarified, with the targeted mineralization of nitrogen of nitrogen-containing malodorous compounds into NO3-N and the odor characteristics of sulfur-containing malodorous compounds disappeared. These findings provided new insight for utilizing metal ions to enhance the direct ozone oxidation capacity of malodorous compounds. © 2022, The Authors. All rights reserved.

关键词： Ozone

Chronic exposure to 3,6-dichlorocarbazole exacerbates non-alcoholic fatty liver disease in zebrafish by disrupting lipid metabolism and inducing special lipid biomarker accumulation

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Chemosphere 2024年 352卷 141442页

作者： Hou, Cunchuang Huang, Mengyao Wang, Pingping Zhang, Qiaoyun Wang, Guowei Gao, Shixiang School of Environmental Ecology and Biological Engineering Key Laboratory for Green Chemical Process of Ministry of Education Wuhan Institute of Technology Wuhan 430205 China Department of Human Microbiome & Implantology & Orthodontics School and Hospital of Stomatology Cheeloo College of Medicine Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration Jinan 250012 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210093 China

Most previous studies have focused primarily on the adverse effects of environmental chemicals on organisms of good healthy. Although global prevalence of non-alcoholic fatty liver disease (NAFLD) has reached approximately 25%, the impact of environmentally persistent organic chemicals on organisms with NAFLD is substantially unknown. Polyhalogenated carbazoles (PHCZs) as emerging contaminants have been frequently detected in the environment and organisms. In this study, we investigated the impact of the most frequently detected PHCZs, 3,6-dichlorocarbazole (36-CCZ), on zebrafish with high-fat diet (HFD)-induced NAFLD. After 4 weeks exposure to environmentally relevant concentrations of 36-CCZ (0.16–0.45 μg/L), the accumulation of lipid in zebrafish liver dramatically increased, and the transcription of genes involved in lipid synthesis, transport and oxidation was significantly upregulated, demonstrating that 36-CCZ had exacerbated the NAFLD in zebrafish. Lipidomic analysis indicated that 36-CCZ had significantly affected liver lipid metabolic pathways, mainly including glycerolipids and glycerophospholipids. Additionally, fifteen lipids were identified as potential lipid biomarkers for 36-CCZ exacerbation of NAFLD, including diacylglycerols (DGs), triglycerides (TGs), phosphatidylcholines (PCs), phosphatidylethanolamines (PEs), phosphatidic acid (PA), and phosphatidylinositol (PI). These findings demonstrate that long-term exposure to 36-CCZ can promote the progression of NAFLD, which will contribute to raising awareness of the health risks of PHCZs. © 2024 Elsevier Ltd

关键词： Adverse effects Histological analysis Lipidomic analysis Persistent organic pollutants Polyhalogenated carbazoles

Enhancing the Separation Performance of the Resulting Pa-Tfc Nanofiltration Membrane by Modulating Interfacial Polymerization with Nanobubbles: Regulation Technology and Mechanism

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SSRN 2022年

作者： Bai, Chengling Li, Ping Gao, Xuerui Li, Pan Gu, Zhengyang Yu, Shuili 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

Due to the low flux and unsatisfactory selective separation performance, the wider application of the nanofiltration membranes in reclamation of wastewater is limited. Therefore, breaking through the permeation-selectivity trade-off of polyamide thin film composite (PA-TFC) nanofiltration membranes remains a challenging problem. Herein, a strategy for preparing PA TFC NF membranes with enhanced performance by using nanobubbles (NBs) to control PIP moleculars diffusion is first introduced. The negatively charged NBs are confined to the aqueous phase side after the initial nanofilm is formed, which reduces the further diffusion of PIP monomers to the reaction zone by electrostatic interaction;thus, then smoother, thinner, and looser PA layers, with enhanced permeabilities, are formed. The restricted diffusion of PIP monomers also makes more acyl chloride groups, which can be hydrolyzed into carboxyl groups, being left in the PA layer. Therefore, an enhanced negatively charged surface is achieved, which endows the membrane with a higher separation potential. Compared with the control PA-TFC membranes, the NB3-PA-TFC membrane increases the rejection rate of Na 2 SO 4 from 91.67% to 97.78%, the pure water flux from 16.6 L·m 2 ·h -1 ·bar -1 to 24.0 L·m 2 ·h -1 ·bar -1 , and the Cl - /SO 4 2- selective separation factor ( S ) from 35.17 to 135.58. This study develops a novel type of well-behaved NF membranes, which are suitable to be produced in industry, and it extends the application scope of nanobubble technology. © 2022, The Authors. All rights reserved.

关键词： Monomers

Highly Efficient Removal of Cr(Vi) from Electroplating Wastewater by Ferrous/Ferric Hydroxide Complexes: From laboratory to Pilot-Scale Study

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SSRN 2022年

作者： Lin, Xiaoqing Xu, Longqian Zhao, Zhenyu Liu, Shanshan Zhang, Jiaming Wu, Deli State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Low electron transfer efficiency and cumbersome processes are widely known to negatively affect the application of iron-based materials in the treatment of electroplating wastewater. In this study, ferrous/ferric hydroxide complex (FHC) was successfully synthesized to greatly improve the efficiency of electron transfer for Cr(VI) removal;meanwhile, the effect of the anionic interlayer and the possible removal mechanism were well investigated. We revealed that sulfate interlayer can greatly promote Cr(VI) removal of FHC by 10.4% and 29.0% compared to chloride interlayer and carbonate interlayer, respectively. It was innovatively discovered that the inhibitory of complexing agents (in the order of EDTA > CA > NTA > TA > OA) was closely associated with the amount of -OH and/or -COOH. In comparison to dissolved Fe(II), almost no effect of the initial pH value was found due to the buffering effect of the surface -OH. These results were different from some previously reported Cr(VI) removal of Fe(II)-containing minerals. Based on the characterization and batch experiments, the electrostatic attraction of surface -OH to Cr(VI), accompanied by simultaneous reduction by surface structural Fe(II), was responsible for the rapid reaction within the first 2 min and then co-precipitation to the formation of CrOOH and FeCr 2 O 4 . The chemical cost (1.12 $ m -3 ) and the sludge yield (29.14 kg m -3 ) were reduced by 71.3% and 54.1%, respectively, in the pilot-scale experiments using the FHC process compared to the NaHSO 3 process. These findings provided new insight for utilizing the anionic interlayer to improve the activity of FHC to remediate Cr(VI)-containing electroplating wastewater. © 2022, The Authors. All rights reserved.

关键词： Iron compounds

A Highly Efficient Method for Analysis Cefadroxil Antibiotic Hydrolysis Based on Electrochemical Fingerprints

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SSRN 2022年

作者： Zhu, Xiaoyu Zhang, Huirong Zhai, Yongxin Wang, Ying State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 China

Understanding antibiotic hydrolysis rates are important for predicting their environmental persistence as biologically active contaminants. In this study, hydrolysis rates and Arrhenius constants were determined as a function of pH and temperature for cefadroxil antibiotics by the electrochemical method. Hydrolysis rate and half-life were studied as a function of temperature (5, 25, and 45°C), and pH (1, 3, 5, 7, 9, and 11). The antibiotics were hydrolyzed under ambient conditions (pH 7 and 25 °C);half-live was 11 d by electrochemical method. Base-catalyzed hydrolysis rates were significantly greater than acid-catalyzed and neutral pH hydrolysis rates. Hydrolysis rates increased 2.6- to 3.3-fold for a 10 °C increase in temperature. Meanwhile, the hydrolysis product was also determined by the electrochemical approach and the potential degradation pathway was proposed based on mass spectrometry results. The results of this research demonstrate that degradation of β-lactam antibiotics will likely occur over several weeks in most surface waters and over several days in more alkaline systems. Our research shows a new method that under typical environmental conditions (pH and temperature) β -lactam antibiotics are hydrolytically stable with a long half-life;they thus contribute to the ongoing assessment of their environmental fate. © 2022, The Authors. All rights reserved.

关键词： Antibiotics

Optimal Trajectory Planning and Tracking for Autonomous Vehicles Considering Chassis Nonlinearities

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Optimal Trajectory Planning and Tracking for Autonomous Vehi...

2021 China Automation Congress, CAC 2021

作者： Zhang, Yuxiang Lyu, Jidong Wang, Jinkun Gao, Bingzhao Wang, Yuhai The State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China The Advanced Technology Department of SAIC Motor Shanghai China Clean Energy Automotive Engineering Center Tongji University Shanghai China

ISBN: (纸本)9781665426473

This paper proposes a new type of local trajectory planning method for autonomous vehicles. In this frame, a lane-change or lane-keeping operation passed by the upper module is performed. Then, the trajectory planning algorithm can directly optimize the control sequences and obtain a feasible trajectory considering chassis nonlinearities and obstacles avoidance. A more accurate nonlinear model that considers the chassis' nonlinearity based on the traditional linear bicycle model is realized using a cubic polynomial of slip angle to fit the magic formula. Constraint conditions are designed based on the traffic environment to avoid obstacles. With a more precise model, the control sequences can be used as feedforward control and accompany with fine feedback control to receive a good motion control performance even in a high-speed situation. Furthermore, different time-steps of the control variables are used to reduce the number of solving variables to decrease calculation time. Simulation results verify the effectiveness of the proposed method and the accuracy of the proposed nonlinear vehicle model. © 2021 IEEE

关键词： Chassis

Contribution of root respiration to total soil respiration during non-growing season in mine reclaimed soil with different covering-soil thicknesses

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International Journal of Coal Science & Technology 2021年第5期8卷 1130-1137页

作者： Min Chen Xiaoyang Chen Zhiyong Hu Tingyu Fan Shiwen Zhang Ying Liu State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines(Anhui University of Science and Technology) Huainan 232001AnhuiChina School of Earth and Environment Anhui University of Science and TechnologyHuainan 232001AnhuiChina Anhui Engineering Laboratory for Comprehensive Utilization of Water and Soil Resources&Ecological Protection in Mining Area with High Groundwater Level Huainan 232001AnhuiChina

An accurate assessment of root respiration in mine reclaimed soil is important for effectively evaluating mining area *** study investigated dynamic changes in root respiration and the contribution of root respiration to total soil respiration(R_(r)/R_(t) ratio)during the non-growing season in mine reclaimed soil,with different covering-soil *** to the covering-soil thicknesses,the study area was divided into four sites:10-25 cm(site A),25-45 cm(site B),45-55 cm(site C),and 55-65 cm(site D).From November 2017 to April 2018(except February in 2018),the soil respiration,root respiration,temperature at 5 cm,water content,and root biomass were *** results show that soil temperature and root respiration exhibited similar diurnal and monthly *** root respiration is strongly influenced by soil temperature during the non-growing season,with an exponential and positive relationship(P<0.001).Root respiration varies with the covering-soil thickness and is greatest with a covering-soil thickness of 25-45 *** R_(r)/R_(t) ratio also exhibits monthly *** the non-growing season,the mean value of the R_(r)/R_(t) ratio is 51.15%in mine reclaimed *** study indicates that root respiration is the primary source of soil respiration and is an important factor for estimating the potential emission of soil CO_(2) from mine reclaimed soil at the regional scale.

关键词： Root respiration Soil respiration Soil temperature Soil water content Root biomass

Experimental Study on Thermal Runaway Propagation Characteristics of Ncm811 Lithium-Ion Batteries with Different Socs Induced by Dual Heat Sources

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SSRN 2023年

作者： Zhou, Gang Yang, Siqi Liu, Yang Wang, Junling Bian, Yinghui Yu, Hao Zhang, Qi Li, Yuying Niu, Chenxi College of Safety and Environmental Engineering Shandong University of Science and Technology Qingdao266590 China State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing100081 China State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province The Ministry of Science and Technology Shandong University of Science and Technology Qingdao266590 China Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control College of Safety Science and Engineering Nanjing Tech University Nanjing211816 China College of Energy Storage Technology Shandong University of Science and Technology Qingdao266590 China

Thermal runaway propagation (TRP) of lithium-ion batteries (LIBs) is one of the important causes of safety accidents in new energy vehicles. In order to investigate the theoretical system of TRP of NCM811 Li(Ni0.8 Co0.1Mn0.1)O2 cell (group) under dual heat sources, an experimental platform of coupled thermal abuse stimulation was built to study the TRP and combustion behavior of NCM cells in different states-of-charge (SOC). The results show that the time to reach thermal runaway (TR) of LIB under dual thermal source is shortened by 952.3s on average, and the possibility of TRP of the cell module is greatly enhanced. With the increase of SOC from 25% to 100%, the TR trigger time of NCM cell is shortened from 2773s to 2311s, the TR trigger temperature is reduced from 263.7°C to 175.7°C. The TRP of the NCM cell module under dual heat sources induction can occur at different SOCs, and the TRP duration increases from 57s at 25%SOC to 174s at 100% SOC. In addition, the cell eruption and combustion behaviors induced by dual heat sources become more intense with the increase of SOC, the cell mass loss rate also increases rapidly with the increase of eruption and combustion behaviors. © 2023, The Authors. All rights reserved.

关键词： Lithium-ion batteries

Analysis of the electromechanical coupling characteristics of piezoelectric semiconductor PN junction shell structures

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Applied Mathematics and Mechanics(English Edition) 2025年第6期 1167-1186页

作者： Tiqing WANG Feng ZHU Peng LI Zelin XU Tingfeng MA I.KUZNETSOVA Zhenghua QIAN State Key Laboratory of Mechanics and Control for Aerospace Structures College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics College of General Aviation and Flight Nanjing University of Aeronautics and Astronautics Shenzhen Research Institute Nanjing University of Aeronautics and Astronautics Key Laboratory of Impact and Safety Engineering Ministry of EducationNingbo University Kotel'nikov Institute of Radio Engineering and Electronics of RAS

Based on the nonlinear drift-diffusion(NLDD) model, the coupled behavior between the mechanical and electrical fields in piezoelectric semiconductor(PS) PN junctions under two typical loading conditions is investigated. The governing equations for the general shell structure of the PS PN junction are derived within the framework of virtual work principles and charge continuity conditions. The distributions of the electromechanical coupling field are obtained by the Fourier series expansion and the differential quadrature method(DQM), and the nonlinearity is addressed with the iterative method. Several numerical examples are presented to investigate the effects of mechanical loading on the charge carrier transport characteristics. It is found that the barrier height of the heterojunction can be effectively modulated by mechanical loading. Furthermore,a nonlinearity index is introduced to quantify the influence of nonlinearity in the *** is noted that, when the concentration difference between the two sides is considerable,the nonlinear results differ significantly from the linear results, thereby necessitating the adoption of the NLDD model.

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