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Pilot Combustion Characteristics of RP-3 Kerosene in a Trapped-Vortex Cavity with Radial Bluff-Body Flameholder

Journal of Thermal Science 2023年第1期32卷 468-487页

作者： ZHANG Yuxuan HE Xiaomin College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Aero-Engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information TechnologyNanjing 210016China

The structure of the trapped-vortex cavity and radial flameholder can maintain stable combustion under severe conditions,such as sub-atmospheric pressure and high inlet *** article reports a complete study of combustion characteristics for this *** flow field of the physical model was obtained by numerical *** pilot combustion characteristics,including the combustion process,combustion efficiency,and wall temperature distribution,were studied by *** pilot combustion can be divided into three modes under different fuel flow rates and inlet ***“cavity maintained(CM)”mode,pilot flame exists at both sides of the cavity zone,rotating with the main ***“cavity-flameholder maintained(CFM)”mode,the combustion process occurs both inside the cavity and behind the *** in“flameholder maintained(FM)”mode,the cavity will quench,and the combustion is maintained by the radial flameholder *** to the difference in the flow field,the flame pattern and propagation direction vary under different combustion *** combustion efficiency,influenced by combustion modes,shows an increase-decrease-increase *** wall temperature distribution is also affected;the cavity wall temperature decreases under large fuel flux while the temperature of the burner-back plate continues to rise to a maximum value.

关键词： cavity spray combustion flame propagation combustion efficiency wall temperature

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Fe/BC co-conditioners with environmental and economic benefits on composting:reduced NH_(3)emissions and improved fertilizer quality

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Biochar 2024年第1期6卷 50-65页

作者： Jixiang Wang Huifang Xie Jun Wu Weijiang He Xi Zhang Junxia Huang Yanfang Feng Lihong Xue Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and EnvironmentJiangsu Academy of Agricultural SciencesNanjing 210014China. Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China. Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes Ministry of EducationCollege of EnvironmentHohai UniversityNanjing 210098China.

The significant volatilization of NH_(3)during aerobic composting causes nitrogen(N)losses and environmental *** iron(Fe)and biochar(BC)can influence the N conversion process in *** application can delay the maturation of materials,while biochar can enhance the quality of organic *** combination of these two conditioners may help decrease NH_(3)emissions and improve organic fertilizer ***,this study investigates the effects of different doses of FeCl_(3)and BC on NH_(3)emissions and organic fertilizer quality during *** results demonstrated that Fe/BC co-conditioners reduced the accumulation of NH_(3)emissions during composting by 11.1-48.2%,increased the total nutrient content by 0.6-15.3%,and enhanced economic and environmental benefits by 0.1-23.6$t^(−1).At the high-temperature stage of composting,Fe/BC co-conditioners decreased the pH by 0.3-1.2,but there was no significant difference compared to the control at the end of composting,and they did not affect compost *** structural equation model analysis suggested that the reduction in NH_(3)emis-sions was related to ammonia-oxidizing bacteria(AOB),NH_(4)^(+)-N,and total nitrogen(TN).As a result,the Fe/BC co-conditioners reduced NH_(3)emissions by lowering the pH at the beginning of composting and increasing the content of NH_(4)^(+)-*** study concludes that Fe/BC co-conditioners could complement each other to significantly reduce NH_(3)emissions and improve the quality of organic fertilizers.

关键词： Aerobic composting Biochar Organic fertilizer NH_(3)emissions FeCl_(3)

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Exploring the release mechanism of micro/nanoplastics from different layers of masks in water: towards reduction of plastic contamination in masks

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environmental Science and Pollution Research 2024年第22期31卷 33047-33057页

作者： Ge, Wei Liang, Hao Gao, Ping Li, Yan Song, Ningning Wu, Juan Chai, Chao School of Life Sciences Shandong Province Key Laboratory of Applied Mycology Qingdao Agricultural University Qingdao266109 China School of Engineering China Pharmaceutical University Nanjing210009 China School of Resources and Environment Qingdao Engineering Research Center for Rural Environment Qingdao Agricultural University Qingdao266109 China Institute of Agricultural Resource and Environment Shandong Academy of Agricultural Sciences Jinan250100 China

During the COVID-19 pandemic, a substantial quantity of disposable face masks was discarded, consisting of three layers of nonwoven fabric. However, their improper disposal led to the release of microplastics (MPs) and nanoplastics (NPs) when they ended up in aquatic environments. To analyze the release kinetics and size characteristics of these masks, release experiments were performed on commercially available disposable masks over a period of 7 days and micro- and nanoplastic releases were detected using fiber counting and nanoparticle tracking analysis. The study’s findings revealed that there was no significant difference (p > 0.05) in the quantity of MPs released among the layers of the masks. However, the quantity of NPs released from the middle layer of the mask was 25.9 ± 1.3 × 108 to 81.3 ± 5.3 × 108 particles/piece, significantly higher than the inner and outer layers (p © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Microplastic

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"Forever chemicals":a sticky environmental problem

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Frontiers of environmental Science & engineering 2024年第10期18卷 175-183页

作者： Junhua Fang Shaolin Li Rongliang Qiu Wei-Xian Zhang College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510642China College of Natural Resources and Environment Guangdong Provincial Key Laboratory of Agricultural&Rural Pollution Abatement and Environmental SafetySouth China Agricultural UniversityGuangzhou 510642China

The discovery and widespread use of per-and poly-fluoroalkyl substances(PFAS)have exemplified the beneficial role of chemistry in modern life,yet *** also underscored significant environmental and health *** "forever chemicals"due to their remarkable persistence,PFAS present formidable challenges in terms of contamination and *** to address these challenges have led to the development of innovative degradation technologies,such as hydrothermal alkali treatment(HALT),low-temperature mineralization,and mechanochemical degradation,offering promising solutions to PFAS ***,these advancements must be accompanied by robust investment in research,collaboration among stakeholders,and global responsibility to ensure effective management of PFAs contamination and mitigate its adverse impacts on ecosystems and humanhealth.

关键词： PFAS Degradation technologies environmental remediation Global responsibility

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Advances in controlled-release fertilizer encapsulated by organic-inorganic composite membranes

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Particuology 2024年第1期84卷 236-248页

作者： Xueping Wang Yongyan Yang Shuangling Zhong Qingye Meng Yiwei Li Jia Wang Yan Gao Xuejun Cui College of Chemistry Jilin UniversityChangchun130012China College of Resources and Environment Jilin Agricultural UniversityChangchun130118China State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchun130012China Weihai Institute for Bionics-Jilin University Weihai264400China

Heavy use of conventional fertilizers can lead to negative environmental ***-release fertilizers(CRFs)can effectively reduce the amounts of fertilizers used,improve the availability of fer-tilizers,and which is conducive to the protection of the ecological environment and sustainable devel-opment of ***,it is imperative to develop and use CRFs as an alternative to traditional *** review aims to present the classification,raw material composition,benefits,release process,release mode,and manufacturing methods of fertilizers coated with organic-inorganic com-posite membranes(OICMs)in order to provide an overall update and summarize CRFs encapsulated by OICMs and provide an insight for future trends in the field of *** is expected that utilizing CRFs encapsulated by OICMs and their characteristics for agricultural applications can provide innovative ideas and suggestions for developing novel CRFs suitable for modern and sustainable agriculture.

关键词： Controlled-release fertilizers Organic-inorganic composite membranes Surface treatments

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Sono-assembly of folate-decorated curcumins/alginate core-shell microcomplex and its targeted delivery and pH/reduction dual-triggered release

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Particuology 2024年第1期84卷 168-177页

作者： Qingye Meng Shuangling Zhong Jingfei Wang Zhenqian Zhang Yan Gao Xuejun Cui College of Chemistry Jilin University Changchun130012China College of Resources and Environment Jilin Agricultural University Changchun130118China State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchun130012China Weihai Institute for Bionics-Jlin University Weihai264400China

In this study,sodium alginate(SA),a non-toxic natural polysaccharide with good biocompatibility and biodegradability,was developed for targeted delivery of curcumin(CUR)in tumor *** strategy is to sulfhydrylate the folic acid(FA)modified SA,and the CUR dissolved in ethyl acetate(EAC)phase is coated in microcapsules by a quick,efficient and environment-friendly sonochemical *** EAC in the microcapsule core is volatile,which can be recycled and reused to reduce *** prepared mi-crocapsules(FA-RSMCs@CUR)exhibited similar toxicity to free curcumin in anti-tumour evaluation in ***-RSMCs@CUR also exhibited effective antibacterial properties in the antibacterial evaluation in *** is expected to become a low-cost tumor targeting vector in the future,and has the potential to be promoted in clinical application.

关键词： Reductive-responsive Sodium alginate Microcapsule Targeted delivery Sonochemical

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Interface properties and failures of REBCO coated conductor tapes:Research progress and challenges

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Superconductivity 2023年第4期8卷 53-68页

作者： Peifeng Gao Yameng Zhang Xingzhe Wang Youhe Zhou Key Laboratory of Mechanics on Western Disaster and Environment Ministry of EducationCollege of Civil Engineering and MechanicsKey Laboratory of Special Function Materials and Structure Design of Ministry of EducationLanzhou UniversityLanzhou 730000China

RE‐Ba‐Cu‐O(REBCO,where RE=Y,Gd,Sm,and other rare earth elements)coated conductor(CC)tapes are promising for applications in high‐energy physics and high‐field science owing to their significant advantages such as high critical magnetic field,high current density,and the ability to achieve superconductivity at liquid nitrogen ***,the mechanical and superconducting performances of these CC tapes are significantly affected by interface failures,such as interfacial delamination and coating fractures,which arise from the complex interplay of mechanical stress induced by magnet processing,thermal mismatch stress during cooling,electromagnetic stress under high magnetic fields,and thermal stress during *** study comprehensively reviews the interface properties and failure behavior of REBCO CC ***,the research progress in characterizing the intricate interface properties of REBCO CC is systematically ***,the interface failure behavior in extreme multifield environments was analyzed and ***,this study outlines optimization strategies to mitigate interface failure risks in REBCO superconducting magnet ***,we address the current challenges and future perspectives on interface issues in REBCO CC *** addressing these challenges,this study offers valuable insights for advancing the development and practical implementation of superconducting technologies in diverse applications.

关键词： REBCO coated conductor tapes Interface properties Delamination Electro‐mechanical degradation Optimization

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Biochar-based composites for removing chlorinated organic pollutants: Applications, mechanisms, and perspectives

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environmental Science and Ecotechnology 2024年第5期21卷 47-61页

作者： Qingqing Song Fanying Kong Bing-Feng Liu Xueting Song Hong-Yu Ren State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China School of Water Conservancy and Civil Engineering Northeast Agricultural UniversityHarbin150030China

Chlorinated organic pollutants constitute a significant category of persistent organic pollutants due to their widespread presence in the environment,which is primarily attributed to the expansion of agricultural and industrial *** pollutants are characterized by their persistence,potent toxicity,and capability for long-range dispersion,emphasizing the importance of their eradication to mitigate environmental *** conventional methods for removing chlorinated organic pollutants encompass advanced oxidation,catalytic oxidation,and bioremediation,the utilization of biochar has emerged as a prominent green and efficacious method in recent *** we review biochar's role in remediating typical chlorinated organics,including polychlorinated biphenyls(PCBs),triclosan(TCS),trichloroethene(TCE),tetrachloroethylene(PCE),organochlorine pesticides(OCPs),and chlorobenzenes(CBs).We focus on the impact of biochar material properties on the adsorption mechanisms of chlorinated *** review highlights the use of biochar as a sustainable and eco-friendly method for removing chlorinated organic pollutants,especially when combined with biological or chemical *** facilitates electron transfer efficiency between microorganisms,promoting the growth of dechlorinating bacteria and mitigating the toxicity of chlorinated organics through ***,biochar can activate processes such as advanced oxidation or nano zero-valent iron,generating free radicals to decompose chlorinated organic *** observe a broader application of biochar and bioprocesses for treating chlorinated organic pollutants in soil,reducing environmental ***,for water-based pollutants,integrating biochar with chemical methods proved more effective,leading to superior purification *** review contributes to the theoretical and practical application of biochar for removing environmental chlorinated organic pollutants.

关键词： Biochar Chlorinated organic pollutants Polychlorinated biphenyls Triclosan Trichloroethene

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Facile preparation of ZIF-8/ZIF-67-derived biomass carbon composites for highly efficient electromagnetic wave absorption

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Chinese Chemical Letters 2024年第9期35卷 376-381页

作者： Xuexia Lin Yihui Zhou Jiafu Hong Xiaofeng Wei Bin Liu Chong-Chen Wang College of Chemical Engineering Huaqiao UniversityXiamen 361021China Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation Beijing University of Civil Engineering and ArchitectureBeijing 100044China College of Materials Science and Engineering Huaqiao UniversityXiamen 361021China

Biomass absorbing materials have received increasing attention for electromagnetic wave(EMW)absorption field absorbing materials due to its low density and high dielectric ***,the biomass EMW absorbing materials often suffer from the insufficient magnetic loss and impedance *** this work,a facile ZIF-8/ZIF-67-derived biomass composites(CoZnO@BPC)was prepared for high-performance EMW absorption based on multi-component micro,nano structures metal particles and xanthoce sorbifolia bunge shells-derived biomass porous carbon(BPC).The dielectric loss and/or magnetic loss abilities of CoZnO@BPC composites were adjusted by changing the mass ratio of Zn^(2+)to Co^(2+)*** the filled amount of 20 wt%,Co Zn O@BPC exhibited excellent EMW absorption with the minimum reflection loss(RL)at 15.84 GHz is-50.2 dB,and the matching thickness is only 1.7 *** adjusting the ZIFs mass ratio,the effective absorption bandwidth(EAB)can be up to 5.92 GHz(from 12.08 GHz to 18 GHz),and the matching thickness is only 1.9 *** results provide a new insight for the economical and efficient preparation of lightweight and advanced microwave absorbing materials.

关键词： Biomass Metal organic framework EMW absorption Dielectric loss Magnetic loss

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Acetylacetone effectively controlled the secondary metabolites of Microcystis aeruginosa under simulated sunlight irradiation

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Journal of environmental Sciences 2024年第1期135卷 285-295页

作者： Xiaomeng Wang Yixin Luo Shujuan Zhang Lixiang Zhou Department of Environmental Engineering College of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China The State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Inactivation of cyanobacterial cells and simultaneous control of secondary metabolites is of significant necessity for the treatment of cyanobacteria-laden ***(AcAc)has been reported a specific algicide to inactivate Microcystis aeruginosa(***)and an effective light activator to degrade *** study systematically investigated the photodegradation ability of AcAc under xenon(Xe)irradiation on the secondary metabolites of ***,mainly algal organic matter(AOM),especially toxic microcystin-LR(MC-LR).Results showed that AcAc outperformed H_(2)O_(2)in destructing the protein-like substances,humic acid-like matters,aromatic proteins and fulvic-like substances of *** MC-LR(250μg/L),0.05 mmol/L AcAc attained the same degradation efficiency(87.0%)as 0.1mmol/L H_(2)O_(2).The degradation mechanism of Xe/AcAc might involve photo-induced energy/electron transfer and formation of carbon center *** conditions(pH>9.0)were detrimental to the photoactivity of AcAc,corresponding to the observed degradation rate constant(k_(1)value)of MC-LR drastically decreasing to 0.0013 min^(-1)as solution pH exceeded *** PO_(4)^(3-)and HCO_(3)^(-)ions had obvious inhibition effects,whereas NO_(3)^(-)slightly improved k_(1)value from 0.0277 min^(-1)to 0.0321 min^(-1).The presence of AOM did not significantly inhibit MC-LR degradation in Xe/AcAc *** addition,the biological toxicity of MC-LR was greatly reduced after *** results demonstrated that AcAc was an alternative algicidal agent to effectively inactivate algal cells and simultaneously control the secondary metabolites after cell ***,the concentration and irradiation conditions should be further optimized in practical application.

关键词： Microcystis aeruginosa Photodegradation Acetylacetone Secondary metabolites Microcystin

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