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Self-powered temperature-changing system driven by wind energy

Microsystems & Nanoengineering 2024年第5期10卷 171-180页

作者： Jiayu Li Boxun Liu Mingyang Li Yahui Li Wangyang Ding Guanlin Liu Jun Luo Nan Chen Lingyu Wan Wenjuan Wei Center on Nanoenergy Research Institute of Science and Technology for Carbon Peak&NeutralityGuangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of Physical Science&TechnologyGuangxi UniversityNanning 530004China Department of Chemistry and the Tsinghua Center for Frontier Polymer Research Tsinghua UniversityBeijing 100084PR China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Department of Micro/Nano Electronics School of Electronic Information and Electrical EngineeringShanghai Jjao Tong UniversityShanghai 200240PR China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materialsand School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China

Research on outdoor,mobile,and self-powered temperature-control devices has always been highly *** devices can reduce energy consumption for cooling and heating,and they have broad market *** this basis,a rotary disc-shaped triboelectric nanogenerator(TENG)with a maximum open-circuit voltage of 6913 V,a maximum short-circuit current of 85μA,and a maximum transferred charge of 1.3μC was *** synthesized a ferroelectric ceramic composed of 0.15PbTiO_(3)-0.85PbSc_(o.5)Ta_(o.5)O_(3)(0.15PT-0.85PST),which exhibited excellent electrothermal effects at room *** quenching,the electrothermal effect(A Tmax)and energy harvesting properties of the device were 1.574 K and 0.542 J/cm3,***,for the frst time,we proposed a self-powered temperature quantification control system with a rotary disc-shaped *** device effectively harnessed wind and water energy,in addition to other types of *** system consisted of energy collecting cups,a rotating disc-shaped FEP-rabbit fur TENG,a circuit management module,and a ferroelectric ceramic chip *** the circuit management module,the system converted external wind energy into a high-voltage electric field at the two ends of the 0.15PT-0.85PST ceramic chip to fully stimulate the electrothermal *** a speed of 200 rpm,the temperature change in the insulated cup within 276 s was 0.49 K,and the volume of the insulated cup was 300 times greater than that of the 0.15PT-0.85PST ceramic *** with the results reported in previous work,the cooling and heating times were both reduced by 31%,and the temperature changes for both cooling and heating increased by 81%.Moreover,the heating and cooling temperatures of the device optimized on this basis were increased to 1.19K and 0.93 K,*** great improvement in the temperature variation performance confrmed the great potential of the device for *** research could serve as a reference for reduci

关键词： ceramic shaped ferroelectric

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Retrofitting low-performance units to abate sewer overflow pollution based on mathematical model and Sobol algorithm

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Journal of Hydrodynamics 2023年第4期35卷 770-781页

作者： Zhi-chao Zhao Xiao-min Huang Hai-long Yin Jun-bo Wen Xiao-wei Fu Changjiang Institute of Survey PlanningDesign and ResearchWuhan430010China Key Laboratory of Yangtze River Water Environment Ministry of EducationTongji UniversityShanghai200092China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai200092China Hubei Provincial Engineering Research Center for Comprehensive Water Environment Treatment in the Yangtze River Basin Wuhan430010China Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water ResourcesShanghai200092China

Optimal retrofit of low-performance units(LPUs)is promising to abate overflow pollutant mass loading of sewer systems during *** study presents a combination of mathematical model and Sobol algorithm to help identify LPUs of sewer systems and design retrofitting ***,the solution to minimize the overflow pollutant mass loading from sewers systems can be efficiently *** developed method was demonstrated at a catchment served by one wastewater treatment plant in the Chaohu City,Anhui Province of China,with five pumping stations and a total sewer length of 58.3 *** the catchment,there are three rivers and a small lake to receive overflows from the sewer *** them,one river that was mostly polluted was selected as the object of overflow pollution abatement during wet weather *** identifying the LPUs of the sewer system and developing retrofitting strategies using Sobol sequence,the mitigation of overflow pollution during wet weather period was *** show that the mass loading of chemical oxygen demand(COD)discharged into the target river could be reduced by 40.6%,by implementing optimal retrofit strategy of LPUs,i.e.,increasing the conveyance capacities of two pumping stations by 2.5–3.2 times and augmenting the diameters of 12 sewers by 1.25–1.29 *** further coordinate the abatement of overflow pollution and retrofit investment,Sobol sensitivity analysis was conducted to screen the dominant LPUs to update the optimal retrofit *** applying the updated strategy,the overflow COD mass loading per overflow event was close to that of non-updated strategy,while the retrofitting length of sewers was reduced by 40%.Therefore,on the basis of the presented method,decision-makers can flexibly develop retrofitting strategies of sewer system to abate overflow pollution during wet weathers in a cost-effective way.

关键词： Urban sewer system low-performance units Sobol sensitivity analysis sewer overflow optimal retrofit strategy

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Advanced capacitive deionization for ion selective separation: Insights into mechanism over a functional classification

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Chemosphere 2024年 346卷 140601页

作者： Sun, Xiaoqi Hao, Zewei Zhou, Xuefei Chen, Jiabin Zhang, Yalei State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Due to the diversity and variability of harmful ions in polluted water bodies, the selective removal and separation for specific ions is of great significance in water purification and resource processes. Capacitive deionization (CDI), an emerging desalination technology, shows great potential to selectively remove harmful ionic pollutants and further recover valuable ions because of the simple operation and low energy consumption. Researchers have done a lot of work to investigate ion selectivity utilizing CDI, including both theoretical and experimental studies. Nevertheless, in the investigation of selective mechanisms, phenomena where carbon materials exhibit entirely opposite selectivity require further analysis. Furthermore, there is a need to summarize the specific chemical reaction mechanisms, including the formation of hydrogen bonds, complexation reactions, and ligand exchanges, within selective electrodes, which have not been thoroughly examined in detail previously. In order to fill these gaps, in this review, we summarized the recent progress of CDI technologies for ion selective separation, and explored the selective separation mechanism of CDI from three aspects: selective physical adsorption, specific chemical reaction, and the utilization of selective barriers. Additionally, this review analyzes in detail the formation process of chemical bonds and ion conversion pathways when ions interact with electrode materials. Finally, some significant development prospects and challenges were offered for the future selective CDI systems. We believe the review will provide new insights for researchers in the field of ion selective separation. © 2023 Elsevier Ltd

关键词： Ions

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Peroxidase-like activity of widely-used commercial inorganic pigments induces oxidative stress and antibiotic degradation: Implications for health risks

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Science of the Total Environment 2025年 958卷 177979页

作者： He, Kexin Sun, Chenxi Yang, Shuxue Liu, Huiting Fu, Heyun Qu, Xiaolei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu 210023 China School of Environmental and Chemical Engineering Shenyang Ligong University Liaoning 110159 China

Inorganic pigments, which often contain significant amounts of nanoparticles, are crucial chemicals for human life. They are produced in massive quantities and widely used in consumer products, food, and pharmaceuticals. Herein, we reported that a variety of commonly used commercial inorganic pigments possess peroxidase-like activity, catalyzing hydrogen peroxide (H2O2) decomposition into reactive oxygen species, primarily hydroxyl radical ([rad]OH) and superoxide radical anion (O2[rad]−). The catalytic activity of inorganic pigments exhibits saturation kinetics as described by the Michaelis-Menten model, with optimal pH and temperature conditions that can be found in the human body. The enzyme-mimicking activity is strongly correlated with the formation of [rad]OH (R2 = 0.98), indicating the radical-mediated reaction pathway. The peroxidase-like activity of inorganic pigments can induce significant oxidative stress at health-relevant H2O2 concentrations (3–30 μM), as demonstrated by the ascorbic acid assay. Additionally, the peroxidase-like activity of inorganic pigments is able to mediate the oxidation of tetracycline, with oxidation rate constants positively correlated with the pigments' peroxidase-like activity. The discovery of peroxidase-like activity of commercial inorganic pigments sheds light on the reported oxidative stress exerted by these pigments and has important implications for the health risk assessment of inorganic food and pharmaceutical colorants, as well as colored consumer products. © 2024 Elsevier B.V.

关键词： Aspartame

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N-doping offering higher photodegradation performance of dissolved black carbon for organic pollutants: experimental and theoretical studies

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第4期25卷 340-356页

作者： Yong GUO Mengxia CHEN Ting CHEN Ying GUO Zixuan XU Guowei XU Soukthakhane SINSONESACK Keophoungeun KANMANY Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationCollege of EnvironmentHohai UniversityNanjing 210093China Key Laboratory of Environmental Engineering of Jiangsu Province Jiangsu Provincial Academy of Environmental ScienceNanjing 210036China State Key Laboratory of Pollution Control and Resource Reuse Nanjing UniversityNanjing 210023China Central Environmental Laboratory Natural Resources and Environment Research InstituteMinistry of Natural Resources and EnvironmentVientiane 999012Laos

We investigated the influence mechanism of N-doping for dissolved black carbon(DBC)photodegradation of organic *** degradation performance of N-doped dissolved black carbon(NDBC)for tetracycline(TC)(71%)is better than that for methylene blue(MB)(28%)under *** levels are both better than DBC degradation performances for TC(68%)and MB(18%)under *** species quenching experiments suggest that h and-O,are the main reactive species for NDBC photodegraded TC,while-OH and h*are the main reactive species for NDBC photodegraded MB.-OH is not observed during DBC photodegradation of *** is likely because N-doping increases valence-band(VB)energy from 1.55 eV in DBC to 2.04 eV in NDBC;the latter is strong enough to oxidize water to ***,N-doping increases the DBC band gap of 2.29 to 2.62 eV in NDBC,resulting in a higher separation efficiency of photo-generated electrons-holes in NDBC than in *** these factors give NDBC stronger photodegradation performance for TC and MB than ***-performance liquid chromatography-mass spectrometry(HPLC-MS)characterization and toxicity evaluation with the quantitative structure-activity relationship(QSAR)method suggest that TC photodegradation intermediates produced by NDBC have less aromatic structure and are less toxic than those produced by *** adopted a theoretical approach to clarify the relationship between the surface groups of NDBC and the photoactive species *** results add to the understanding of the photochemical behavior of NDBC.

关键词： Dissolved black carbon(DBC) N-doping Organic pollutants Band gap Photodegradation

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Fe-Mofs Nanosheets for Photo-Fenton Degradation of Carbamazepine

SSRN

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SSRN 2024年

作者： Sun, Siyu Hu, Youyou Li, Zhengkui State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Nanjing210023 China School of the Environment Nanjing University Nanjing210023 China

Iron-based metal-organic framework (Fe-MOF) nanosheets have potential as functional components for photocatalysis. Prospectively, employing Fe-MOF nanosheets as photocatalysts would notably improve the efficiency of photogenerated carrier separation. However, achieving efficient synthesis of Fe-MOF nanosheets remains a challenging task. Here we present a bottom-up synthesis strategy for producing two-dimensional Fe-MOF nanosheets (TFMN) of micrometer lateral dimensions and nanometer thickness. The application of TFMN in the photo-Fenton degradation of carbamazepine (CBZ) demonstrates remarkable CBZ degradation performance and excellent efficiency across a wide range of pH values. The transfer direction of electrons and state density are further calculated by density functional theory. Mechanism analysis reveals that h+, ·OH, and ·O2- are identified as the predominant active species contributing to the catalytic oxidation process in the Vis/TFMN/H2O2 system. © 2024, The Authors. All rights reserved.

关键词： Nanosheets

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Releases of Microplastics and Chemicals from Nonwoven Polyester Fabric-Based Polyurethane Synthetic Leather by Photoaging

SSRN

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SSRN 2023年

作者： Shi, Yanqi Huang, Hexinyue Zheng, Lezhou Tian, Yechao Gong, Zhimin Wang, Jiahao Li, Wentao Gao, Shixiang State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210093 China

The nonwoven PET fabrics are chemically, mechanically and thermally treated fiber aggregate without weaving, knitting or braiding, which could be used as a base to make polyurethane (PU) synthetic leather through a series of processing. Our research systematically compared the photoaging behaviors of pure non-woven PET base fabric (NPET-P) and PU synthetic leather (nonwoven PET-base fabrics with PU coating, NPET-U), and their possibilities for microplastic fibers (MPFs) generation and chemical transformation in water. NPET-U was found at a higher oxidation degree with higher O/C ratios and more distinct changes in chemical structures but a slower degradation speed with postponed MPFs release than NPET-P. Different spinning ways of fabrics partly affected the resistance of MPFs release, but the difference between nonwoven and interlocked fabrics was within an order of magnitude. And sunlight aging of fabrics for 365 days approximately equaled 91.9-100.6 hours in the laboratory, which indicated the lab accelerated experiments to simulate natural sunlight aging was extraordinarily intense. Furthermore, elemental concentrations in original fabrics and the leachate of 360 h light aged fabrics were characterized using the inductively coupled plasma optical emission spectrometer (ICP-OES) and analyzed by principal component analysis (PCA). The organic components of the leachate were separated according to their molecular weight with the changes of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and the UV response over aging time. UV stimulation aggravated the role of plastic polymers as disinfection by-product (DBP) precursors. Nevertheless, NPET-U had similar formation potentials of nitrogen-containing DBPs with NPET-P, even though it could produce more nitrogen-contained chemicals. The discussion lucubrated the potential risks of the production of MPFs and chemical release in the leachate with regard to combined plastic pollution. © 2023, The Authors.

关键词： Weaving

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Comparative study of the effects of different surface-coated silver nanoparticles on thyroid disruption and bioaccumulation in zebrafish early life

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Chemosphere 2024年 360卷 142422页

作者： Cao, Huihui Guo, Yinping Ma, Chaofan Wang, Yang Jing, Yuan Chen, Xiaolei Liang, Hongwu Inner Mongolia Key Laboratory of Environmental Pollution Control & Waste Resource Reuse School of Ecology and Environment Inner Mongolia University Hohhot010030 China

The widespread use of silver nanoparticles (AgNPs) in commercial and industrial applications has led to their increased presence in the environment, raising concerns about their ecological and health impacts. This study pioneers an investigation into the chronic versus short-term acute toxicological impacts of differently coated AgNPs on zebrafish, with a novel focus on the thyroid-disrupting effects previously unexplored. The results showed that acute toxicity ranked from highest to lowest as AgNO3 (0.128 mg/L), PVP-AgNPs (1.294 mg/L), Citrate-AgNPs (6.984 mg/L), Uncoated-AgNPs (8.269 mg/L). For bioaccumulation, initial peaks were observed at 2 days, followed by fluctuations over time, with the eventual highest enrichment seen in Uncoated-AgNPs and Citrate-AgNPs at concentrations of 13 and 130 μg/L. Additionally, the four exposure groups showed a significant increase in T3 levels, which was 1.28–2.11 times higher than controls, and significant changes in thyroid peroxidase (TPO) and thyroglobulin (TG) content, indicating thyroid disruption. Gene expression analysis revealed distinct changes in the HPT axis-related genes, providing potential mechanisms underlying the thyroid toxicity induced by different AgNPs. The higher the Ag concentration in zebrafish, the stronger the thyroid disrupting effects, which in turn affected growth and development, in the order of Citrate-AgNPs, Uncoated-AgNPs > AgNO3, PVP-AgNPs. This research underscores the importance of considering nanoparticle coatings in risk assessments and offers insights into the mechanisms by which AgNPs affect aquatic organisms' endocrine systems, highlighting the need for careful nanotechnology use and the relevance of these findings for understanding environmental pollutants' role in thyroid disease. © 2024

关键词： Bioaccumulation

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Effect of Antibiotics and Their Degradation Products on the Chlorine Resistance of Biofilms in Drinking Water Distribution Systems

SSRN

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SSRN 2024年

作者： Ruotong, Xu Jiayi, Xing Ruisi, Chen Yulin, Tang Yongji, Zhang State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

This study investigated the effects of tetracycline (TC) and sulfadiazine (SD), along with their degradation products, on biofilm chlorine resistance. The results showed that low concentrations of antibiotics and their degradation products promoted biofilm formation on tube surfaces and increased resistance to chlorine. There was a positive correlation between antibiotic levels, degradation products, and biofilm chlorine resistance within a specific concentration range. Sulfadiazine had a more significant impact on biofilm chlorine resistance compared to tetracycline. The presence of both antibiotics and their degradation products in water led to an increase in biofilm chlorine resistance, especially when combined with 0.3 mg/L sodium hypochlorite. Furthermore, the study found that gram-negative bacteria with enhanced chlorine resistance predominated in biofilms with antibiotics and degradation products present, leading to overall increased biofilm chlorine resistance. Additionally, higher concentrations of antibiotics and their degradation products were associated with reduced biodiversity within the biofilm. Overall, the findings suggest that the presence of antibiotics and their degradation products can influence biofilm formation, alter bacterial species composition, and enhance biofilm resistance to chlorine in drinking water distribution systems. © 2024, The Authors. All rights reserved.

关键词： Biofilms

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Enhanced Photocatalytic Removal of Bromate in Drinking Water by Au/Tio2 Under Ultraviolet Light

SSRN

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SSRN 2024年

作者： Xu, Ying He, Zhiwen Yu, Shuili Ji, Xingli Zhang, Wei State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

The photo-reduction of bromate (BrO3-) has attracted much attention as the carcinogenesis and genotoxicity of BrO3- in drinking water. In this study, a heterojunction photocatalyst was developed by depositing Au nanoparticles (NPs) onto P25 TiO2 NPs through a one-pot, solvent-thermal process. Due to the unique properties of Au, the Au NPs deposited on the TiO2 surface created a Schottky barrier between the metal and the semiconductor, leading to an effective separation of photo-generated charge carriers as the Au nanoparticles served as electron sinks. The Au/TiO2 photocatalyst demonstrated efficient reduction of bromate under UV light illumination without the need for sacrificial agents. The effect of different Au loading of Au/TiO2 was systematically investigated for their influence on the generation of electrons and the reduction ability of BrO3-. The results indicate that the 1% Au/TiO2 catalyst exhibited a higher concentration of localized electrons, rendering it more effective in BrO3- removal. The photocatalytic efficiency for BrO3- reduction decreased upon the addition of K2S2O8 as an electron quencher, suggesting that the primary factor in this photo-reduction process was the availability of electrons. These findings hold promise for the potential application of the Au/TiO2 catalyst in the removal of BrO3- from drinking water through photo-reduction. © 2024, The Authors. All rights reserved.

关键词： Titanium dioxide

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