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Insights into the conversion of dissolved organic phosphorus favors algal bloom, arsenate biotransformation and microcystins release of Microcystis aeruginosa

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Journal of environmental Sciences 2023年第3期125卷 205-214页

作者： Xiaoyan Zhang Zhenhong Wang Zhuanxi Luo Yan Chen Xuguang Huang College of Chemistry Chemical Engineering and EnvironmentMinnan Normal UniversityKey Laboratory of Modern Separation and Analysis Science and TechnologyKey Laboratory of Pollution Monitoring and ControlZhangzhou 363000China College of Chemical Engineering Huaqiao UniversityXiamen 361021China

Little information is available on influences of the conversion of dissolved organic phosphorus(DOP) to inorganic phosphorus(IP) on algal growth and subsequent behaviors of arsenate(As(V)) in Microcystis aeruginosa(M. aeruginosa). In this study, the influences factors on the conversion of three typical DOP types including adenosine-5-triphosphate disodium salt(ATP), β-glycerophosphate sodium(βP) and D-glucose-6-phosphate disodium salt(GP)were investigated under different extracellular polymeric secretions(EPS) ratios from ***, and As(V) levels. Thus, algal growth, As(V) biotransformation and microcystins(MCs) release of M. aeruginosa were explored in the different converted DOP conditions compared with IP. Results showed that the three DOP to IP without EPS addition became in favor of algal growth during their conversion. Compared with IP, M. aeruginosa growth was thus facilitated in the three converted DOP conditions, subsequently resulting in potential algal bloom particularly at arsenic(As) contaminated water environment. Additionally, DOP after conversion could inhibit As accumulation in M. aeruginosa, thus intracellular As accumulation was lower in the converted DOP conditions than that in IP condition. As(V) biotransformation and MCs release in M. aeruginosa was impacted by different converted DOP with their different types. Specifically, DMA concentrations in media and As(III) ratios in algal cells were promoted in converted βP condition, indicating that the observed dissolved organic compositions from βP conversion could enhance As(V) reduction in M. aeruginosa and then accelerate DMA release. The obtained findings can provide better understanding of cyanobacteria blooms and As biotransformation in different DOP as the main phosphorus source.

关键词： Organic phosphorus Arsenate Phosphate Methylation Extracellular polymeric secretions

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Fabrication of Polytetrafluoroethylene Aerogels with Excellent Sound Absorption and Thermal Insulation

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Chinese Journal of Polymer Science 2025年第5期43卷 808-818页

作者： Cong-Cong Li You-Lei Tu Shao-Yun Guo Jia-Bin Shen State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversityNational Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing TechnologyChengdu610065China Department of Mechanics College of Architecture&EnvironmentSichuan UniversityChengdu610065China

As the application scenarios of aerogels expand,higher requirements are put forward for the materials used to prepare *** to the unique chemical structure,polytetrafluoroethylene(PTFE)has excellent properties such as high-temperature resistance,hydrophobicity,and chemical ***,the PTFE aerogels are difficult to be molded due to the weak interaction between resin *** this work,poly(ethylene oxide)(PEO)was selected as the carrier to assist the PTFE aerogels *** pure PTFE aerogels were prepared by homogeneously mixing PTFE aqueous dispersion and PEO,freeze-drying,and high-temperature *** the mass fraction of PTFE and PEO were appropriate,the porosity of PTFE aerogels exceeded 90%and had a hierarchical honeycomb *** showed that the PTFE aerogels not only had excellent hydrophobicity but also possessed superior acoustic insulation,mechanical strength,thermal insulation,and heat resistance ***,the water contact angle is about 140°.The noise reduction coefficient is 0.34 and the average sound absorption coefficient is greater than 88%in the frequency range of 2000-6400 ***,the thermal conductivity in the air is about 0.045 W/(m·K),and the initial thermal decomposition temperature is 450℃.More importantly,the PTFE aerogels had excellent temperature and corrosion *** after extremely thermal and chemical treatment,they remained unchanged porous structure as well as acoustic and thermal insulation properties,which exhibits great potential for application in many harsh environments.

关键词： Polytetrafluoroethylene Fluoropolymer Aerogel Acoustic absorption Thermal insulation

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Diversity and dynamic response of anaerobic ammonia oxidation granular sludge

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Journal of environmental Sciences 2025年第6期152卷 262-275页

作者： Jiahong Ye Xiang Li Yan Yuan Yayi Wang Yong Huang JunMa Han Wang Pengze Dang Pei-ling Xu School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China State Key Laboratory of Pollution Control and Resources Reuse Shanghai Institute of Pollution Control and Ecological SecurityCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

Red anaerobic ammonia oxidation (Anammox) granular sludge (AnGS) has been reported insuccessfully operating Anammox systems, and its color is associated with sludge ***, in long-term operating systems, AnGS exhibits different sensory colors, physicalstructures, community structures, and denitrification performance, but the relationship betweenthem has not yet been *** AnGS of the Anammox system, which has beenin operation for more than a decade, can be divided into twomain categories: red and *** specific Anammox activity (SAA) in conventional red AnGS increased continuously asthe particle size increased from <0.51 mm to 6.02 ± 0.84 mm. The SAA of white AnGS wereslightly lower than those of red AnGS with similarly-size granules but significantly higherthan AnGS with smaller red granules. Compared with red AnGS, the extracellular polymericsubstances of white AnGS were significantly reduced,mainly due to the higher intracellulariron content, resulting in lower heme c concentration. Thus, heme c may prove not to bean evaluative tool for measuring Anammox activity. Red and white AnGS, whether throughself-aggregation or adsorption by hydroxyl apatite and other carriers, will face the fate ofinternal voids during particle size growth. White AnGS exhibited amore complex microbialcommunity than red AnGS. Candidatus Brocadia was abundant in red AnGS and the abundanceincreased with increasing granule size. Candidatus Kuenenia and Candidatus Jetteniamade significant contributions to denitrification in white AnGS. This study provides a newperspective on particle selection for anammox engineering applications.

关键词： Anaerobic ammonium oxidation granular sludge Sensory diversity Intracellular iron Heme Enzyme activity Microbial diversity

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Cobalt-loaded carbon nanotubes boosted aerobic ciprofloxacin transformation driven by sulfide:A comprehensive mechanism investigation

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Chinese Chemical Letters 2024年第3期35卷 127-134页

作者： Han-Qing Zhao Peili Lu Fei Chen Chen-Xuan Li Rui Yan Yang Mu State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400044China CAS Key Laboratory of Urban Pollutant Conversion Department of Environmental Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment College of Environment and EcologyChongqing UniversityChongqing 400045China College of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China

Sulfide oxidation under aerobic conditions can produce active oxygen for the transformation of organic pollutants in aquatic ***,the catalytic performance of transition metal-supported carbon material on this process is poor *** study found that Co-loaded carbon nanotubes(CNTs)was able to realize the efficient aerobic transformation of antibiotic ciprofloxacin(CIP)by sulfide,with the pseudo-first order reaction rate constant improved from 0.013 h^(-1)without catalyst to 0.44–0.71 h^(-1)with 100 mg/L Co-loaded *** oxygen(^(1)O_(2))was the main active specie playing key roles in the process of CIP aerobic transformation with presence of Co-loaded *** studies indicated that the excellent electron transfer ability of Co-loaded CNTs might play an important role to promote the electron transfer and facilitate the formation of intermediate H_(2)O_(2)and^(1)O_(2).Additionally,the Co-loaded CNTs/sulfide system effectively reduced the acute toxicity of organic pollutant,and Co-loaded CNTs showed remarkable cycling stability and negligible *** study gives a better understanding for the Co-loaded CNTs mediated aerobic antibiotics transformation by sulfide,and provide a reference for the application of Co-loaded carbon materials on organics aerobic transformation by sulfide.

关键词： Ciprofloxacin Aerobic transformation Co-loaded carbon nanotubes Sulfide Singlet oxygen

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Absorption mechanism of SO_(3)on various alkaline absorbents in the presence of SO_(2)

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Journal of environmental Sciences 2025年第3期149卷 268-277页

作者： Junxiang Guo Jin Xiong Yuran Li Jirigele Qinggele Tingyu Zhu Shougang Group Research Institute of Technology Beijing 100043China Beijing Key Laboratory of Green Recyclable Process for Iron&Steel Production Technology Beijing 100043China CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringInnovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China WISDRI City Environment Protection Engineering Limited Company Wuhan 430205China

Sulfur trioxide(SO_(3))as a condensable particle matter has a significant influence on atmospheric visibility,which easily arouses formation of *** is imperative to control the SO_(3)emission from the industrial flue *** commonly used basic absorbents,including Ca(OH)_(2),MgO and NaHCO_(3)were selected to explore the effects of temperature,SO_(2)concentration on the SO_(3)absorption,and the reaction mechanism of SO_(3)absorption was further *** suitable reaction temperature for various absorbents were proposed,Ca(OH)_(2)at the high temperatures above 500°C,MgO at the low temperatures below 320°C,and NaHCO_(3)at the temperature range of 320–500°*** competitive absorption between SO_(2)and SO_(3)was found that the addition of SO_(2)reduced the SO_(3)absorption on Ca(OH)_(2)and NaHCO_(3),while had no effect on *** order of the absorption selectivity of SO_(3)follows MgO,NaHCO_(3)and Ca(OH)_(2)under the given conditions in this *** absorption process of SO_(3)on NaHCO_(3)follows the shrinking core model,thus the absorption reaction continues until NaHCO_(3)was exhausted with the utilization rate of nearly 100%.The absorption process of SO_(3)on Ca(OH)_(2)and MgO follows the grain model,and the dense product layer hinders the further absorption reaction,resulting in low utilization of about 50%for Ca(OH)_(2)and *** research provides a favorable support for the selection of alkaline absorbent for SO_(3)removal in application.

关键词： Alkali absorbent Sulfur trioxide Selectivity Shrinking core model Grain model

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FPGA-based small-world spiking neural network with anti-interference ability under external noise

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Neural Computing and Applications 2024年第20期36卷 12505-12527页

作者： Guo, Lei Liu, Yongkang Wu, Youxi Xu, Guizhi Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering School of Health Sciences and Biomedical Engineering Hebei University of Technology Tianjin300131 China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin300131 China School of Artificial Intelligence Hebei University of Technology Tianjin300401 China

Neuromorphic hardware has become hotspot in the field of brain-like computing due to its advantages. However, the presence of external noise imposes challenges with respect to maintaining normal function of neuromorphic hardware. Biological brains have self-adaptability to external noise, meaning that a brain-like hardware with bio-plausibility can be expected to improve robustness. The purpose of this paper is to implement a highly fitted brain-like hardware with anti-interference ability (AIA) while preserving bio-plausibility. We propose a method of implementing a small-world spiking neural network (SWSNN) with bio-plausibility based on a field-programmable gate array (FPGA), in which the nodes are Izhikevich neuron modules, the edges are synaptic plasticity modules, and the topology is a small-world network. Then, the AIAs of the FPGA-based SNNs with different external noises are evaluated by two anti-interference indices. Further, taking a speech recognition task as the case study, the AIAs of these FPGA-based SNNs are verified in application. Finally, the AIA mechanism of the FPGA-based SNNs is discussed. Our results demonstrate that: (i) In the FPGA-based SWSNN, the FPGA-based Izhikevich neuron modules and the synaptic plasticity modules highly fit to the corresponding simulation results, and the topology conforms to the small-world property of human functional brain networks. (ii) Based on two anti-interference indices, the FPGA-based SWSNN outperforms the FPGA-based SNNs with other topologies, which is further verified by the speech recognition accuracy. (iii) Our discussions hint that the synaptic plasticity is intrinsic factor of the AIA, and the topology is a factor affecting the AIA. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2024.

关键词： Topology

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A diselenide MOF-based nanomotor dual-driven by carbon monoxide and near-infrared-Ⅱ light for multimodal tumor-targeted therapy

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Science China Chemistry 2025年第5期68卷 1952-1969页

作者： Ruizhen Tian Zherui Zhang Liping Song Yijia Li Zhengwei Xu Wang Liu Tianlong Zhang Jiayun Xu Youju Huang Tingting Wang Xiaotong Fan Junqiu Liu China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal University Institute of Sustainability for Chemicals Energy and Environment (ISCE2)Agency for ScienceTechnology and Research (A*STAR)

The dense extracellular matrix and high interstitial pressure within tumors hinder nanoparticle penetration,reducing therapeutic *** address this,we engineered a dual-driven nanomotor based on a diselenide metal–organic framework（MOF） using a layer-by-layer assembly process for multimodal synergistic tumor ***-containing imidazole derivatives coordinated with Zn2+form the MOF,sequentially encapsulating near-infrared-Ⅱ（NIR-Ⅱ） photothermal-responsive gold nanorods（AuRods）,Mn2CO10（MnCO）,and glucose oxidase（GOD）.The nanoparticle surface was functionalized with 4T1 cancer cell membranes（DSACGM NPs）,guiding it to drive toward the tumor *** photothermal effect of AuRods and CO release drives nanomotor propulsion,enhancing tumor tissue *** catalyzes glucose（Glu） oxidation,inducing tumor starvation,while the resulting H2O2triggers CO release,suppressing heat shock protein（HSP） expression and enhancing mild photothermal therapy（PTT）.The release of CO and the Mn2+-triggered Fenton-like reaction from MnCO increased intracellular ROS levels,while diselenide depletion of glutathione（GSH） amplified chemodynamic therapy（CDT）.In vitro and in vivo experiments show that DSACGM NPs induce cancer cell apoptosis under NIR-Ⅱ irradiation and efficiently ablate tumors in mice at sub-hyperthermic temperatures（<45°C） with excellent *** study provides valuable insights into nanomedicine design and its potential in advanced tumor therapies.

关键词： dual-driven nanomotors diselenide metal–organic frameworks CO release NIR-II light-responsive mild photothermal therapy chemodynamic therapy starvation therapy

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Simulation Analysis of Sound Field Characteristics of Spacecraft Cabin Leakage in Orbit Under Multi-Working Conditions 9

Simulation Analysis of Sound Field Characteristics of Spacec...

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9th International Conference on Advances in Machinery, Materials Science and engineering Applications, MMSE 2023

作者： Sun, Wei Li, Zheng Wang, Lina Ren, Guohua Sun, Lichen Jiang, Lixiang Yan, Rongxin Sun, Jipeng Beijing Institute of Satellite Environment Engineering Beijing100094 China Key Laboratory of Reliability and Environmental Engineering Technology Beijing100094 China Harbin Institute of Technology Harbin150006 China

ISBN: (纸本)9781643684383

For manned on-orbit space station system, leakage will reduce the air pressure in the cabin, and seriously endanger the astronauts life safety, so it is urgent to locate the leakage hole quickly. Based on this, this paper establishes a simulation model of leakage flow field and sound field, and analyzes the influence of leakage hole diameter on the characteristics of leakage sound field under the condition of atmospheric leakage to vacuum. The results show that with the increase of hole diameter, the leakage velocity field and the maximum turbulent kinetic energy will increase, but the maximum turbulent dissipation will decrease, and the fluid velocity at the outlet of smooth hole is slightly higher than that of rough hole. The distribution of sound pressure level of low-voltage dipole sound source is relatively uniform. The distribution of sound pressure level of quadrupole sound source is radially outward. The research in this paper can provide technical support for subsequent leakage location. © 2023 The Authors.

关键词： Acoustic fields

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Membrane modification in enhancement of virus removal:A critical review

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Journal of environmental Sciences 2024年第12期146卷 198-216页

作者： Jie Zeng Peter Desmond Huu Hao Ngo Wei Lin Xiao Liu Bingsheng Liu Guibai Li An Ding State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Institute of Environmental Engineering(ISA) RWTH Aachen UniversityAachen 52056Germany Faculty of Engineering University of Technology SydneySydney 2007Australia The Second Construction Co.Ltd.of China Construction Third Engineering Bureau China

Many waterborne diseases are related with viruses,and COVID-19 worldwide has raised the concern of virus security in water into the public *** to other conventional water treatment processes,membrane technology can achieve satisfactory virus removal with fewer chemicals,and prevent the outbreaks of viruses to a maximal *** developed new modification methods to improve membrane *** review focused on the membrane modifications that enhance the performance in virus *** characteristics of viruses and their removal by membrane filtration were briefly generalized,and membrane modifications were systematically discussed through different virus removal mechanisms,including size exclusion,hydrophilic and hydrophobic interactions,electronic interactions,and *** functional materials for membrane modification were summarized based on their ***,it is suggested that membranes should be enhanced through different mechanisms mainly based on their ranks of pore *** current review provided theoretical support regarding membrane modifications in the enhancement of virus removal and avenues for practical application.

关键词： Membrane process Membrane modification Virus removal mechanisms Water treatment

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Efficient and sustained inhibition of ammonia nitrogen release from sediment in water by microbial self-aggregation zeolite layer

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environmental Science and Pollution Research 2024年第39期31卷 51197-51210页

作者： Xu, Jinlan He, Chen Bai, Wenguang Cao, Fen Dai, Jianan School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology Shaanxi Xi’an710055 China Key Laboratory of Northwest Water Resources Environment and Ecology MOE Beijing China Key Laboratory of Environmental Engineering Shaanxi Province Xi’an China

Despite global efforts to manage water eutrophication, the continual release of ammonia nitrogen from sediments maintains the eutrophic state of water bodies, presenting serious challenges to the management. In order to find an efficient method for sediment remediation, the experiment of using signal molecules to enhance the adhesion of microorganisms on zeolite was carried out. Five different zeolitic ammonium adsorptions were examined using two different signal molecules, N-(3-oxohexanoyl)-l-homoserine lactone (OHHL) and N-(β-ketocaproyl)-dl-homoserine lactone (C6), to enhance microbial attachment on two types of zeolites. The results showed that the modified microbial attached Z1 zeolite reinforced with signal molecule C6 had the best effect. The effect was better in the case of high ammonium adsorption, and the TN removal could reach 7.99 mg·L−1 with an inhibition rate of 90.08%. The ammonia nitrogen removal reached 4.75 mg·L−1 with an inhibition rate of 87.64%, and the ammonia nitrogen and total nitrogen of the overlying water reached the surface III water quality standard. In addition, the addition of the signal molecule increased the zeta potential on the surface of the bacterial colloid. In addition, the amount of protein I in the dissolved organic matter (DOM) fraction increased, improving microbial adhesion ability and facilitating their attachment to the zeolite surface. The signal molecule C6 could increase the zeta potential of microbial surface and promote the production of protein I, thus strengthening the attachment of zeolite biofilm and improving the water quality. Graphical abstract: Efficient biological removal of ammonia by microbial self aggregation zeolite. (Figure presented.). © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Sediments

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